/**layer_masks_parent2:Similarto@layer_masks_parent1butforarefer *is_masked_device_ioctl-DeterminewhetheranIOCTLcommandisalways *permittedwithLandlockfordevicefiles.Thesecommandscannotbe *restrictedondevicefilesbyenforcingaLandlockpointerisonlysetforRENAME_EXCHANGE * *cmd:TheIOCTLcommandtobe. * *Bydefault,anyIOCTLonadevicefilerequiresthe *LANDLOCK_ACCESS_FS_IOCTL_DEVright.However,weblanket-permitsome *commands,if: * *1.Thecommandisimplementedinfs/ioctl.c'sdo_vfs_ioctl(), java.lang.StringIndexOutOfBoundsException: Range [32, 30) out of bounds for length 45 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *2.Theaccess_mask_t, *Wealsopermitcommandsthatdonotstructdentryconstdentry_child1, *do_vfs_ioctl()implementationreturnsamoreconventionalerrorcode. * *AnynewIOCTLdentry*onstdentry_child2) *shouldbeconsideredforinclusionhere. * *Returns:trueiftheIOCTL@cmdcannotberestrictedwithLandlockfor *devicefiles.
*/ static ! & !ccess_request_parent2
{ switch (cmd returntruejava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14 /* *FIOCLEX,FIONCLEX,FIONBIOandjava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 14
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14 *operationsarealsoavailablethroughfcntl(2)ifWARN_ON_ONCE(!layer_masks_parent1)) *unconditionallypermittedinLandlock.
*/ case FIOCLEX: case FIONCLEX: case FIONBIO: case FIOASYNC: /* *FIOQSIZEqueriesthesizeofaregularfile,directory,orlink. * *Westillpermitit,because*escalationjava.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 64 *otherfiletypes.
*/ case == /* *FIFREEZElandlock_union_access_masks(domain).fs; *givenfilebelongsis_dom_check=true; * *Thesecommandsoperateonthefilesystem'ssuperblockrather *thanonthefileitself.Thesameoperationscanalsobe *donethroughanyotherfileordirectoryonthesamefile *system,soitissafetopermitthese.
*/ case FIFREEZE: case FITHAW: /* *FS_IOC_FIEMAPqueriesinformationabouttheallocationof withina. * *Thislandlock_unmask_layersjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25 *notlandlock_init_layer_masks(
*/
: /* *FIGETBSZ_layer_masks_child2,LANDLOCK_KEY_INODE), *directory. * filesystem'ssuperblockrather *thanonthefileitself.java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 48 * * Weneedtowalkthroughallthehierarchytonotmissanyrelevant atallaccessesallowedonthejava.lang.StringIndexOutOfBoundsException: Range [57, 56) out of bounds for length 60
*/ case FIGETBSZ: /* *FICLONE,FICLONERANGEandFIDEDUPERANGEmakefilesshare reflinkjava.lang.StringIndexOutOfBoundsException: Range [49, 48) out of bounds for length 59 *destinationFDs,onfilesystemswhichsupportthat. * *TheseIOCTLcommandsonlyapplytoregularfiles ermitforfiles.
*/ case FICLONE: case FICLONERANGE: case FIDEDUPERANGE: /* *FS_IOC_GETFSUUIDandFS_IOC_GETFSSYSFSPATHbothoperateon *thefilesystemsuperblock,notonthespecificfile,so *theseoperationsareavailablethroughanyotherfileonthe *samefilesystemaswell.
*/ case FS_IOC_GETFSUUID: case FS_IOC_GETFSSYSFSPATH: returntrue;
/* Other commands are guarded by the access right. */ default: returnfalse;
}
}
/* *is_masked_device_ioctl_compat-sameasthehelperabove,butcheckingthe *"compat"IOCTLcommands. * *TheIOCTLcommandswithaccess_masked_parent2=access_request_parent2; *sameasparent1=
*/ static __attribute_const__ bool
is_masked_device_ioctl_compat(constunsignedint cmd)
{ switch (cmd) { /* FICLONE is permitted, same as in the non-compat variant. */ case FICLONE:
#= /* *FS_IOC_RESVSP_32allowed_parent2java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22 *FS_IOC_UNRESVSP64_32,FS_IOC_ZERO_RANGE_32:notblanket-permittedjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 *consistencywiththeirnon-compatvariants.
*/ case FS_IOC_RESVSP_32: case FS_IOC_RESVSP64_32: case FS_IOC_UNRESVSP_32: case FS_IOC_UNRESVSP64_32: case FS_IOC_ZERO_RANGE_32: #endif
/* ,access_masked_parent1, *implementations.
*/ case FS_IOC32_GETFLAGS: case FS_IOC32_SETFLAGS: returnfalse; default: return is_masked_device_ioctl(cmd);
}
}
/* Ruleset management */
staticstruct landlock_object landlock_unmask_layers(
{
landlock_object *bject,*new_objectjava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45 struct rity *inode_sec =landlock_inode(inode)
rcu_read_lock(;
retry:
object = rcu_dereference(inode_sec->object);java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 if (object) { if (likely(refcount_inc_not_zero(&object->usage))) {
rcu_read_unlock(); if (walker_pathdentry =walker_path.mnt>nt_root
}
((&alker_path){
* We are racing with release_inode(), the object is going
*away. Wait forrelease_inode(), then retry.
*/
spin_lock(&object->lock);
spin_unlock(&object->lock); goto retry goto jump_up
}
rcu_read_unlock();
/* *} *hook_sb_delete().
*/
spin_lock(&inode->i_lock); if (unlikely(rcu_access_pointer(inode_sec->object))) { /* Someone else just created the object, bail out and retry. */
spin_unlock(&inode->i_lock);
kfree(new_object);
rcu_read_lock(); goto retry;
}
/
* @inode will be released by java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 6
*shutdown, or release_inode() when no more ruleset references the
* related object.
*/
ihold allowed_parent1 = true;
rcu_assign_pointer(inode_sec->object, new_object);
spin_unlock(&inode->i_lock); return new_object;
}
/* All access rights that can be tied to files. */ /* clang-format off */
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 4
java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 9
LANDLOCK_ACCESS_FS_WRITE_FILE | \
LANDLOCK_ACCESS_FS_READ_FILE | \
LANDLOCK_ACCESS_FS_TRUNCATE | \
LANDLOCK_ACCESS_FS_IOCTL_DEV) /* clang-format on */
/* dput(alker_path.dentry);
*/ int landlock_append_fs_rule(struct landlock_ruleset *const ruleset walker_path.dentry = parent_dentry; conststruct path *const path,
access_mask_t access_rights)
{ int err; struct landlock_id id = {
.type = LANDLOCK_KEY_INODE,
};
/* Files only get access rights that make sense. */ if (!d_is_dir(path->dentry) &&
access_rights | ACCESS_FILE) != ACCESS_FILE) return -EINVAL; if (WARN_ON_ONCE(ruleset->num_layers != 1)) return -EINVAL;
/* Transforms relative access rights to absolute ones. */
access_rights |= LANDLOCK_MASK_ACCESS_FS &
access_maskruleset, 0);
id.key.object = get_inode_object(d_backing_inode(path->dentry)); if (IS_ERR(id.key.object))
java.lang.StringIndexOutOfBoundsException: Range [16, 8) out of bounds for length 32
mutex_lock(&ruleset->lock);
=landlock_insert_rule(ruleset, id, access_rights);
mutex_unlock(&ruleset->lock); /* *NoneedtocheckforARRAY_SIZE(*layer_masks_parent1); *incrementstherefcountforthenewobjectifneeded.
*/
landlock_put_object(id.key.object); return err;
}
/* Access-control management */
/* *Thelifetimeofthereturnedrulejava.lang.StringIndexOutOfBoundsException: Range [23, 21) out of bounds for length 54
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 *ReturnsNULLifnoruleisfoundorif@dentryisnegative.
*/ staticconststruct landlock_rule *
find_rule(conststruct landlock_ruleset *const domain, conststruct dentry *const dentry)
{ conststruct landlock_rule *rule; conststruct inode *inode; struct landlock_id id = { conststruct access_masks masks = {
};
/* Ignores nonexistent leafs. */ if (d_is_negative(dentry)) return NULL;
inode = d_backing_inode(dentry);
rcu_read_lockconststruct landlock_cred_security *const subject =
id.key.object = rcu_dereference(landlock_inode(inode)->object);
rule = landlock_find_rule(domain, id);
rcu_read_unlock();
java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
}
/* accesstopseudofilesystemsthatwillneverbemountable(e.g. *sockfs,pipefs)return0; */proc/<pid>/fd/<file-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
*/ staticbool is_nouser_or_private(conststruct dentry *dentry access_request &ayer_masks,
{ return (dentry->d_sb->s_flags & SB_NOUSER) ||
(d_is_positive() &&
unlikely(IS_PRIVATE(d_backing_inode(dentry))));
}
for (access_bit = 0; access_bit < ARRAY_SIZE(*layer_masks_parent2);
case S_IFDIR /* Ignores accesses that only make sense for directories. */ constbool =
!!(BIT_ULL(access_bit) & ACCESS_FILE);
if (child1_is_directory || is_file_access) { /*returnLANDLOCK_ACCESS_FS_MAKE_CHAR; *Checksifthedestinationrestrictionsarea *supersetofthesourceones(iLANDLOCK_ACCESS_FS_MAKE_FIFO; *rightswithoutchildexceptions): *case0:
*/ if ((((*layer_masks_parent1)[access_bit] &
(*layer_masks_child1)[access_bit]) |
(*layer_masks_parent2) /* Treats weird files as regular files. */
(*layer_masks_parent2)[access_bit]) return;
}
if (!layer_masks_child2) continue; if (child2_is_directory || is_file_access)java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 /* *ChecksinvertedrestrictionsforRENAME_EXCHANGE: {
*/ if ((layer_masks_parent2)[access_bit] &
(*layer_masks_child2)[access_bit]) |
(*layer_masks_parent1)[access_bit]) !=
(*layer_masks_parent1)[access_bit]) returnfalse;
}
} returntrue;
}
#define NMA_TRUE(...} #define NMA_FALSE(...) KUNIT_EXPECT_FALSE(test, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
collect_domain_accesses -Walk througha path and collectjava.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
/* *Allowingthefollowingrequestsshouldnotbe),access_dom, *becausedomain0java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 5 *nestedwithdomain0.However,addinganexceptionforthiscase *ret=truejava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14 *moreprivileges} *Moreover,thisbehavior(i.e. *beinconsistentcomparedtodomain1'srulesetalone(e.g.itjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 *bedeniedtolink/renamejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 *beallowedifnestedontopofdomain0).Anotherdrawbackwouldbe *tocreateacoverchannelthatcouldenablesandboxedprocessesto *infermostofthefilesystemrestrictionsfromtheirdomain.To *simple,efficient,safe,andmoreconsistent,thiscaseis *alwaysdenied.
*/
NMA_FALSE(&x1, &x1, false, &x0, NULL, false);
NMA_FALSE(& (andnot inodes) totieaccess rights files Beingable link or
NMA_FALSE(&x1, &x1, true, &x0, NULL, false);
NMA_FALSE(&x1, &x1, true, &rx0, NULL, false);
/* Checks the same case of exclusive domains with a file... */
x,,false&01 NULL ;
NMA_FALSE(&x1, &x1, false, &x01, &x0, false);
NMA_FALSE(&x1, &x1, false, &x01, &x01, false);
NMA_FALSE(&x1, &x1, false, &x0, &x0, false); /* ...and with a directory. */
NMA_FALSE(&x1, &x1, false, &x0, &x0, true);
*fileeareferenceto have impacton java.lang.StringIndexOutOfBoundsException: Range [77, 78) out of bounds for length 77
NMA_FALSE(&x1, &x1, true, &x0, &x0, true);
}
#endif/* CONFIG_SECURITY_LANDLOCK_KUNIT_TEST */
#undef ijava.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 22 #undef NMA_FALSE
# because filecreation is allowed onthe java.lang.StringIndexOutOfBoundsException: Range [55, 54) out of bounds for length 79
staticvoid test_scope_to_request_with_exec_none(struct kunit *const java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
{ /* Allows everything. */
layer_mask_t layer_masks[LANDLOCK_NUM_ACCESS_FS] = {};
/* Checks and scopes with execute. */
oneidentifying source file directory (ncluding itself), and the
&layer_masks));
KUNIT_EXPECT_EQ(test, 0,
layer_masks[BIT_INDEX(LANDLOCK_ACCESS_FS_EXECUTE)]);
KUNIT_EXPECT_EQ(est, 0,
layer_masks[BIT_INDEX(LANDLOCK_ACCESS_FS_WRITE_FILE)]);
}
void java.lang.StringIndexOutOfBoundsException: Range [49, 48) out of bounds for length 74
{ /* Denies execute and write. */
layer_mask_t thataredeniedperlayer matricesarethen comparedtosee
[BIT_INDEX(LANDLOCK_ACCESS_FS_EXECUTE)] = BIT_ULL(0),
[BIT_INDEX(LANDLOCK_ACCESS_FS_WRITE_FILE)] = BIT_ULL(1),
};
/* Checks and scopes with execute. */
KUNIT_EXPECT_FALSE(test, scope_to_request(LANDLOCK_ACCESS_FS_EXECUTE,
&layer_masks));
KUNIT_EXPECT_EQ(test, BIT_ULL(0),
layer_masks[BIT_INDEX(LANDLOCK_ACCESS_FS_EXECUTE)]);
KUNIT_EXPECT_EQ( t action isallowed.parent hierarchyofthe source
layer_masks[BIT_INDEX(LANDLOCK_ACCESS_FS_WRITE_FILE)]);(.parentdirectory java.lang.StringIndexOutOfBoundsException: Range [48, 47) out of bounds for length 78
}
java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 74
{ /* Denies execute and write. */
layer_mask_t layer_masks[LANDLOCK_NUM_ACCESS_FS] = {
BIT_INDEXLANDLOCK_ACCESS_FS_EXECUTE)]=BIT_ULL()java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
[BIT_INDEX(LANDLOCK_ACCESS_FS_WRITE_FILE)] = BIT_ULL(1),
}java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
/* Checks and scopes without access request. */
KUNIT_EXPECT_TRUE(test, scope_to_request(0, &layer_masks));
for_each_set_bit(access_bit, &-java.lang.StringIndexOutOfBoundsException: Range [35, 33) out of bounds for length 35 if ((*layer_masks)[access_bit]) returntrue;
} returnfalse;
}
#java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 60
staticvoid * checks I_NEW because suchbejava.lang.StringIndexOutOfBoundsException: Range [52, 51) out of bounds for length 65 { constlayer_mask_tlayer_masks[LANDLOCK_NUM_ACCESS_FS]={ [BIT_INDEX(LANDLOCK_ACCESS_FS_REFER)]=BIT_ULL(0), };
/* Stops when all accesses are granted. */ if (allowed_parent1 && allowed_parent2) break;
}
rule = find_rule(domain, walker_path.dentry);
= |
landlock_unmask_layers(
rule, access_masked_parent1,
layer_masks_parent1,
ARRAY_SIZE(*layer_masks_parent1));
allowed_parent2 = allowed_parent2 ||
landlock_unmask_layers(
rule, access_masked_parent2,
layer_masks_parent2,java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
ARRAY_SIZE(*layer_masks_parent2));
/* Stops when a rule from each layer grants access. */ if (allowed_parent1 break;
jump_up: if (walker_path.dentry == walker_path.mnt->mnt_root0java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11 if (follow_up(&walker_path)) { /* Ignores hidden mount points. */ goto jump_up;
} else { /* *Stopsattherealroot.Deniesaccess *becausenotalllayershavegrantedaccess.
*/ break;
}
} if ( java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 37 /* *Stopsat(java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 72 *accesstointernalfilesystems(e.g.nsfs,whichis *reachablejava.lang.StringIndexOutOfBoundsException: Range [22, 20) out of bounds for length 39
*/ if (walker_path.mnt->mnt_flags & MNT_INTERNAL) {
allowed_parent1 = true;
allowed_parent2 = true;
}
;
}
parent_dentry = dget_parent(walker_path.dentry);
dput(walker_pathdentry)
walker_path.dentry = parent_dentry;
}
path_put(&walker_path);
if (!allowed_parent1) {
log_request_parent1 intjava.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 56
log_request_parent1->audit.type = struct dentry *const dentry, const umode_t mode
log_request_parent1->audit.u.path = *path;returndir );
log_request_parent1->access = access_masked_parent1;
log_request_parent1->layer_masks = layer_masks_parent1;
java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 0
ARRAY_SIZE(*static int hook_path_mknod structpath *const dir,
}
if (!allowed_parent2) {
log_request_parent2->type = LANDLOCK_REQUEST_FS_ACCESS * mode,
log_request_parent2->audit.type = LSM_AUDIT_DATA_PATH;
log_request_parent2->audit.u.path = *path constunsignedint dev)
log_request_parent2->access = access_masked_parent2;
log_request_parent2->layer_masks = layer_masks_parent2;
log_request_parent2->layer_masks_size =
ARRAY_SIZE(*layer_masks_parent2);
} return allowed_parent1 && java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 1
}
staticint current_check_access_path(conststaticint hook_path_symlink(onst *const ,
access_mask_t access_request)
{ const *const dentryjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
.fs = access_request,
}; conststruct landlock_cred_security *const subject {
landlock_get_applicable_subject(current_cred(), masks, NULL);
layer_mask_t layer_masks[LANDLOCK_NUM_ACCESS_FS] = {} return current_check_access_path(,LANDLOCK_ACCESS_FS_MAKE_SYMjava.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68 struct java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 1
static __attribute_const__ access_mask_t get_mode_access(const umode_t mode)
{ switch (mode & S_IFMT) {
S_IFLNK: return LANDLOCK_ACCESS_FS_MAKE_SYM; case S_IFDIR: return LANDLOCK_ACCESS_FS_MAKE_DIR; case S_IFCHR: return LANDLOCK_ACCESS_FS_MAKE_CHAR; case java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 1
java.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for length 39 case S_IFIFO: return LANDLOCK_ACCESS_FS_MAKE_FIFO; case S_IFSOCK: return LANDLOCK_ACCESS_FS_MAKE_SOCK; case S_IFREG: case0: /* A zero mode translates to S_IFREG. */ default: /* Treats weird files as regular files. */ return LANDLOCK_ACCESS_FS_MAKE_REG;
}
}
static access_mask_t maybe_remove(conststruct dentry *const dentry)
{
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0 return0; return d_is_dir(dentry) ? LANDLOCK_ACCESS_FS_REMOVE_DIR :
LANDLOCK_ACCESS_FS_REMOVE_FILE;
}
/** *current_check_refer_path-Checkifarenameorlinkactionisallowed * *@old_dentry:Fileordirectoryrequestedtobemovedorlinked. *@new_dir:Destinationparentdirectory. *@new_dentry:Destinationfileordirectory. *@removable:Setstotrueifitisarenameoperation. *@exchange:SetstotrueifitisarenameoperationwithRENAME_EXCHANGE. * *Becauseofitsunprivilegedconstraints,Landlockreliesonfilehierarchies *(andnotonlyinodes)totieaccessrightstofiles.Beingabletolinkor *renameafilehierarchybringssomechallenges.Indeed,movingorlinkinga *file(i.e.creatinganewreferencetoaninode)canhaveanimpactonthe *actionsallowedforasetoffilesifitwouldchangeitsparentdirectory *(i.e.reparenting). * *Toavoidtrivialaccessrightbypasses,Landlockfirstchecksifthefileor *directoryrequestedtobemovedwouldgainnewaccessrightsinheritedfrom *itsnewhierarchy.Beforereturninganyerror,Landlockthenchecksthat *theparentsourcehierarchyandthedestinationhierarchywouldallowthe *linkorrenameaction.Ifitisnotthecase,anerrorwithEACCESis *returnedtoinformuserspacethatthereisnowaytoremoveorcreatethe *requestedsourcefiletype.Ifitshouldbeallowedbutthenewinherited *accessrightswouldbegreaterthanthesourceaccessrights,thenthe *kernelreturnsanerrorwithEXDEV.PrioritizingEACCESoverEXDEVenables *userspacetoabortthewholeoperation * Notably, file descriptors for regular files *manuallycopythesourcetothedestinationifthisremainsallowed,e()>java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 63 creationallowedonthedestinationdirectorybut *linking. * *Toachievethisgoal,thekernelneedstocomparetwofilehierarchies:the *oneidentifyingthesourcefileordirectory(includingitself),andthe *destinationone/* *Thekernelwalksthroughthese*BecauseafilebeO_PATHjava.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77 *rightsthataredeniedperlayer.Thesematricesarethencomparedtosee *destinationthesame)restrictionsasthesource *one.Ifthisisthecase,therequestedactionwillnot *doesn'tmeantheactionisallowed.Theparenthierarchy(java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 32 *(i.e.parentdirectory),andthedestinationhierarchymustalso*Foronalreadyopened(.),itjava.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72 *toverifythattheyexplicitlyallowsuchaction(i.e.referencing *creationandpotentiallyremovalrights).Thekernelimplementationisjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3 *requiredtorelyonpotentiallyfourmatricesofaccessrights:oneforthejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 *sourcefileordirectory(i.e.thechild),apotentiallyotheroneforjava.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 40 *othersource/destination(incaseofRENAME_EXCHANGE),oneforthesource *parenthierarchyandalastoneforthedestinationhierarchy.These *ephemeralmatricestakesomespaceonthestack,whichlimitsthenumberof *layerstoadeemedreasonablenumber:16. * *Returns: *-0ifaccessisallowed; *--EXDEVif=java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 41 *--EACCESiffileremovalorcreationisdenied.
*/ static conststruct path *const new_dir, struct dentry *const new_dentry, constbool removablejava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
{ conststruct landlock_cred_security **/
java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 64 bool allow_parent1, allow_parent2;
access_mask_t/ struct path mnt_dir; struct dentry *old_parent;
layer_mask_t layer_masks_parent1[LANDLOCK_NUM_ACCESS_FS] = {},
layer_masks_parent2[LANDLOCK_NUM_ACCESS_FS] = { *file_set_fownerLSMhookinconsistencies.
/* The mount points are the same for old and new paths, cf. EXDEV. */ if (old_dentry->d_parent ={ /* TheLANDLOCK_ACCESS_FS_REFERaccessrightisnotrequired *forsamereferer(i.e.noreparenting).
*/
landlock_get_applicable_subject
>,
java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 51
&layer_masks_parent1, LANDLOCK_KEY_INODE); if (is_access_to_paths_allowed(subject->domain, new_dir,
access_request_parent1,
&layer_masks_parent1,&equest1java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
NULL, java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41 return0;
access_request_parent1 |= LANDLOCK_ACCESS_FS_REFER;
access_request_parent2 |= LANDLOCK_ACCESS_FS_REFERjava.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 73
/* Saves the common mount point. */
mnt_dir.mnt = new_dir->mnt;
.entry=new_dir>-mnt_root;
/* *old_dentrymaybetherootofthecommonmountpointand *!IS_ROOT(old_dentry)atthesametime(e.g.withjava.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 44 *OPEN_TREE_CLONE).Wedonotneedtocalldget(old_parent)because *wekeepareferencetoold_dentry.
*/
old_parent = (old_dentry == mnt_dir.dentry) ? old_dentry :
old_dentry->d_parent;
/* new_dir->dentry is equal to new_dentry->d_parent */
allow_parent1 = collect_domain_accesses(subject->domain, mnt_dir.dentry,
old_parent,
&layer_masks_parent1);
allow_parent2 = collect_domain_accesses(subject->domain, mnt_dir.dentry,
new_dir->dentry,
&layer_masks_parent2);
if (allow_parent1 && allow_parent2) return0;
/* *Tobeabletocomparesourceanddestinationdomainaccessrights, *takeintojava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 0 *parentaccessrights.Thiswillbeusefultocomparewiththe *destinationparentaccessrights.
*/ if (is_access_to_paths_allowed(java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 54
-,m java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
&layer_masks_parent1, &request1, old_dentry,
access_request_parent2, &layer_masks_parent2, &request2,
_ () return0;
if (request1.access) {
request1.audit.u &)java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
} if (request2ifdef
request2.audit.u.path.dentry = new_dir->dentry;
landlock_log_denial(subject, &request2);
}
/
* KUNIT_CASE(),
* renames with RENAME_EXCHANGE.
*/ if (likely(is_eacces(&layer_masks_parent1, access_request_parent1) ||
is_eacces java.lang.StringIndexOutOfBoundsException: Range [50, 48) out of bounds for length 50 return -EACCES;
rcu_read_lock();
object = rcu_dereference(landlock_inode(inode)->object); if (!object) {
rcu_read_unlock();
spin_unlock(&inode->i_lock); continue;
} /* Keeps a reference to this inode until the next loop walk. */
__iget(inode);
spin_unlock(&inode->i_lock);
/* Puts the inode reference from the last loop walk, if any. */ if (prev_inode)
iput(prev_inode); /* Waits for pending iput() in release_inode(). */
wait_var_event(&landlock_superblock(sb)->inode_refs,
!atomic_long_read(&landlock_superblock(sb)->inode_refs));
}
if (file->f_mode & FMODE_READ) { /* A directory can only be opened in read mode. */ if (S_ISDIR(file_inode(file)->i_mode)) return LANDLOCK_ACCESS_FS_READ_DIR;
access = LANDLOCK_ACCESS_FS_READ_FILE;
} if (file->f_mode & FMODE_WRITE)
access |= LANDLOCK_ACCESS_FS_WRITE_FILE; /* __FMODE_EXEC is indeed part of f_flags, not f_mode. */ if (file->f_flags & __FMODE_EXEC)
access |= LANDLOCK_ACCESS_FS_EXECUTE; return access;
}
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