diff options
| author | Eiichi Tsukata <devel@etsukata.com> | 2020-08-06 15:18:48 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2020-08-07 11:50:17 -0700 |
| commit | 96cf2a2c75567ff56195fe3126d497a2e7e4379f (patch) | |
| tree | 0776f5737a93c42665263c4f07ad536f651427c7 /fs/xfs/xfs_globals.c | |
| parent | b63da6c8dfa9b2ab3554e8c59ef294d1f28bb9bd (diff) | |
xfs: Fix UBSAN null-ptr-deref in xfs_sysfs_init
If xfs_sysfs_init is called with parent_kobj == NULL, UBSAN
shows the following warning:
UBSAN: null-ptr-deref in ./fs/xfs/xfs_sysfs.h:37:23
member access within null pointer of type 'struct xfs_kobj'
Call Trace:
dump_stack+0x10e/0x195
ubsan_type_mismatch_common+0x241/0x280
__ubsan_handle_type_mismatch_v1+0x32/0x40
init_xfs_fs+0x12b/0x28f
do_one_initcall+0xdd/0x1d0
do_initcall_level+0x151/0x1b6
do_initcalls+0x50/0x8f
do_basic_setup+0x29/0x2b
kernel_init_freeable+0x19f/0x20b
kernel_init+0x11/0x1e0
ret_from_fork+0x22/0x30
Fix it by checking parent_kobj before the code accesses its member.
Signed-off-by: Eiichi Tsukata <devel@etsukata.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: minor whitespace edits]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_globals.c')
0 files changed, 0 insertions, 0 deletions