diff options
| author | Dongliang Mu <mudongliangabcd@gmail.com> | 2022-10-18 08:48:07 -0500 |
|---|---|---|
| committer | Dave Kleikamp <dave.kleikamp@oracle.com> | 2022-10-18 08:49:42 -0500 |
| commit | 898f706695682b9954f280d95e49fa86ffa55d08 (patch) | |
| tree | abd223efffb99bcf200b2fafa0a9282fe34f51c8 /fs/fhandle.c | |
| parent | bbb8ceb5e2421184db9560e9d2cfaf858e1db616 (diff) | |
fs: jfs: fix shift-out-of-bounds in dbAllocAG
Syzbot found a crash : UBSAN: shift-out-of-bounds in dbAllocAG. The
underlying bug is the missing check of bmp->db_agl2size. The field can
be greater than 64 and trigger the shift-out-of-bounds.
Fix this bug by adding a check of bmp->db_agl2size in dbMount since this
field is used in many following functions. The upper bound for this
field is L2MAXL2SIZE - L2MAXAG, thanks for the help of Dave Kleikamp.
Note that, for maintenance, I reorganized error handling code of dbMount.
Reported-by: syzbot+15342c1aa6a00fb7a438@syzkaller.appspotmail.com
Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Diffstat (limited to 'fs/fhandle.c')
0 files changed, 0 insertions, 0 deletions