[syzbot] [jfs?] KASAN: slab-out-of-bounds Write in diWrite

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syzbot

unread,
Apr 25, 2024, 5:10:22 PMApr 25
to jfs-dis...@lists.sourceforge.net, linux-...@vger.kernel.org, linux-...@vger.kernel.org, sha...@kernel.org, syzkall...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: 7b4f2bc91c15 Add linux-next specific files for 20240418
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1181b910980000
kernel config: https://syzkaller.appspot.com/x/.config?x=ae644165a243bf62
dashboard link: https://syzkaller.appspot.com/bug?extid=aa6df9d3b383bf5f047f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108f21c7180000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=128532bb180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/524a18e6c5be/disk-7b4f2bc9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/029f1b84d653/vmlinux-7b4f2bc9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c02d1542e886/bzImage-7b4f2bc9.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/b09f946202a4/mount_0.gz

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10dec06b180000
final oops: https://syzkaller.appspot.com/x/report.txt?x=12dec06b180000
console output: https://syzkaller.appspot.com/x/log.txt?x=14dec06b180000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa6df9...@syzkaller.appspotmail.com

loop0: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: use-after-free in diWrite+0xde3/0x19b0 fs/jfs/jfs_imap.c:750
Write of size 32 at addr ffff888076cee0c0 by task syz-executor949/5083

CPU: 1 PID: 5083 Comm: syz-executor949 Not tainted 6.9.0-rc4-next-20240418-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
__asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
diWrite+0xde3/0x19b0 fs/jfs/jfs_imap.c:750
txCommit+0xa1a/0x6a20 fs/jfs/jfs_txnmgr.c:1255
add_missing_indices fs/jfs/jfs_dtree.c:2661 [inline]
jfs_readdir+0x28e9/0x4660 fs/jfs/jfs_dtree.c:3009
wrap_directory_iterator+0x94/0xe0 fs/readdir.c:67
iterate_dir+0x65e/0x820 fs/readdir.c:110
__do_sys_getdents64 fs/readdir.c:409 [inline]
__se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff57c567679
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffddcb47e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fffddcb49b8 RCX: 00007ff57c567679
RDX: 000000000000005d RSI: 00000000200002c0 RDI: 0000000000000005
RBP: 00007ff57c5e0610 R08: 0000000000000000 R09: 00007fffddcb49b8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffddcb49a8 R14: 0000000000000001 R15: 0000000000000001
</TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76cee
flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff)
raw: 00fff80000000000 ffffea0001db3bc8 ffffea0001dcea48 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x500cc2(GFP_HIGHUSER|__GFP_ACCOUNT), pid 5078, tgid 397447660 (sshd), ts 5078, free_ts 51945391130
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1476
prep_new_page mm/page_alloc.c:1484 [inline]
get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3446
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4704
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
pipe_write+0x657/0x1a40 fs/pipe.c:513
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5080 tgid 5080 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1096 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2609
__folio_put+0x3b9/0x620 mm/swap.c:129
pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
pipe_update_tail fs/pipe.c:224 [inline]
pipe_read+0x6f2/0x13e0 fs/pipe.c:344
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x9c4/0xbd0 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
ffff888076cedf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888076cee000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff888076cee080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
^
ffff888076cee100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ffff888076cee180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
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Lizhi Xu

unread,
May 16, 2024, 8:53:05 PMMay 16
to syzbot+aa6df9...@syzkaller.appspotmail.com, syzkall...@googlegroups.com
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git ed30a4a51bb1

diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 2ec35889ad24..84c9abb0fa71 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -746,7 +746,9 @@ int diWrite(tid_t tid, struct inode *ip)
p = (dtpage_t *) &jfs_ip->i_dtroot;
xp = (dtpage_t *) & dp->di_dtroot;
lv = ilinelock->lv;
- for (n = 0; n < ilinelock->index; n++, lv++) {
+ printk("sp ms: %d, dp ms: %d, %s\n", p->header.maxslot, xp->header.maxslot, __func__);
+ if (p->header.maxslot < DTPAGEMAXSLOT && xp->header.maxslot < DTPAGEMAXSLOT)
+ for (n = 0; n < ilinelock->index && lv->offset < DTPAGEMAXSLOT; n++, lv++) {
memcpy(&xp->slot[lv->offset], &p->slot[lv->offset],
lv->length << L2DTSLOTSIZE);
}

syzbot

unread,
May 16, 2024, 9:05:06 PMMay 16
to linux-...@vger.kernel.org, lizh...@windriver.com, syzkall...@googlegroups.com
Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-out-of-bounds Read in jfs_readdir

loop0: detected capacity change from 0 to 32768
sp ms: 103, dp ms: 2, diWrite
==================================================================
BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894
Read of size 1 at addr ffff8880112dfdd5 by task syz-executor.0/5535

CPU: 1 PID: 5535 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894
wrap_directory_iterator+0x94/0xe0 fs/readdir.c:67
iterate_dir+0x539/0x6f0 fs/readdir.c:110
__do_sys_getdents64 fs/readdir.c:409 [inline]
__se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f447227dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4472f0a0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f44723abf80 RCX: 00007f447227dea9
RDX: 000000000000005d RSI: 00000000200002c0 RDI: 0000000000000005
RBP: 00007f44722ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f44723abf80 R15: 00007ffff75dcee8
</TASK>

Allocated by task 5535:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc_lru+0x178/0x350 mm/slub.c:3864
alloc_inode_sb include/linux/fs.h:3091 [inline]
jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105
alloc_inode fs/inode.c:261 [inline]
iget_locked+0x1ad/0x850 fs/inode.c:1280
jfs_iget+0x22/0x3b0 fs/jfs/inode.c:29
jfs_fill_super+0x808/0xc50 fs/jfs/super.c:580
mount_bdev+0x20a/0x2d0 fs/super.c:1658
legacy_get_tree+0xee/0x190 fs/fs_context.c:662
vfs_get_tree+0x90/0x2a0 fs/super.c:1779
do_new_mount+0x2be/0xb40 fs/namespace.c:3352
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8880112def00
which belongs to the cache jfs_ip of size 2240
The buggy address is located 1557 bytes to the right of
allocated 2240-byte region [ffff8880112def00, ffff8880112df7c0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112d8
head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888015bb6d01
flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000840 ffff888015be6dc0 dead000000000122 0000000000000000
raw: 0000000000000000 00000000000d000d 00000001ffffffff ffff888015bb6d01
head: 00fff80000000840 ffff888015be6dc0 dead000000000122 0000000000000000
head: 0000000000000000 00000000000d000d 00000001ffffffff ffff888015bb6d01
head: 00fff80000000003 ffffea000044b601 dead000000000122 00000000ffffffff
head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5492, tgid 556946219 (syz-executor.0), ts 5494, free_ts 89804801893
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
__alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2175
allocate_slab mm/slub.c:2338 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2391
___slab_alloc+0xc73/0x1260 mm/slub.c:3525
__slab_alloc mm/slub.c:3610 [inline]
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
kmem_cache_alloc_lru+0x253/0x350 mm/slub.c:3864
alloc_inode_sb include/linux/fs.h:3091 [inline]
jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105
alloc_inode fs/inode.c:261 [inline]
new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007
new_inode+0x22/0x1d0 fs/inode.c:1033
jfs_fill_super+0x408/0xc50 fs/jfs/super.c:544
mount_bdev+0x20a/0x2d0 fs/super.c:1658
legacy_get_tree+0xee/0x190 fs/fs_context.c:662
vfs_get_tree+0x90/0x2a0 fs/super.c:1779
do_new_mount+0x2be/0xb40 fs/namespace.c:3352
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
page last free pid 5473 tgid 5473 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
discard_slab mm/slub.c:2437 [inline]
__put_partials+0xeb/0x130 mm/slub.c:2906
put_cpu_partial+0x17c/0x250 mm/slub.c:2981
__slab_free+0x2ea/0x3d0 mm/slub.c:4151
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc+0x174/0x340 mm/slub.c:3852
getname_flags+0xbd/0x4f0 fs/namei.c:139
do_sys_openat2+0xd2/0x1d0 fs/open.c:1400
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1432
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
ffff8880112dfc80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880112dfd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880112dfd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff8880112dfe00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880112dfe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================


Tested on:

commit: ed30a4a5 Linux 6.9-rc5
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=15266ae0980000
kernel config: https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc
dashboard link: https://syzkaller.appspot.com/bug?extid=aa6df9d3b383bf5f047f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=11605ed0980000

Lizhi Xu

unread,
May 16, 2024, 10:03:43 PMMay 16
to syzbot+aa6df9...@syzkaller.appspotmail.com, syzkall...@googlegroups.com
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git ed30a4a51bb1

diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 2ec35889ad24..d9b302938ed2 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -747,6 +747,8 @@ int diWrite(tid_t tid, struct inode *ip)
xp = (dtpage_t *) & dp->di_dtroot;
lv = ilinelock->lv;
for (n = 0; n < ilinelock->index; n++, lv++) {
+ printk("lv: %p offset:%d %s\n", lv, lv->offset, __func__);
+ if (lv->offset < DTPAGEMAXSLOT)

syzbot

unread,
May 16, 2024, 10:19:05 PMMay 16
to linux-...@vger.kernel.org, lizh...@windriver.com, syzkall...@googlegroups.com
Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-out-of-bounds Read in jfs_readdir

loop0: detected capacity change from 0 to 32768
lv: ffffc900028520b0 offset:0 diWrite
lv: ffffc900028520b2 offset:6 diWrite
lv: ffffc900028520b4 offset:0 diWrite
lv: ffffc900028520b6 offset:0 diWrite
==================================================================
BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894
Read of size 1 at addr ffff888076df3d15 by task syz-executor.0/5492

CPU: 0 PID: 5492 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
jfs_readdir+0x1b79/0x4660 fs/jfs/jfs_dtree.c:2894
wrap_directory_iterator+0x94/0xe0 fs/readdir.c:67
iterate_dir+0x539/0x6f0 fs/readdir.c:110
__do_sys_getdents64 fs/readdir.c:409 [inline]
__se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:394
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8966e7dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f89669ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f8966fabf80 RCX: 00007f8966e7dea9
RDX: 000000000000005d RSI: 00000000200002c0 RDI: 0000000000000005
RBP: 00007f8966eca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f8966fabf80 R15: 00007ffe3b2048e8
</TASK>

The buggy address belongs to the object at ffff888076df3780
which belongs to the cache jfs_ip of size 2240
The buggy address is located 1429 bytes inside of
allocated 2240-byte region [ffff888076df3780, ffff888076df4040)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76df0
head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88802aef9f01
flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000840 ffff8880197418c0 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000001ffffffff ffff88802aef9f01
head: 00fff80000000840 ffff8880197418c0 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000001ffffffff ffff88802aef9f01
head: 00fff80000000003 ffffea0001db7c01 dead000000000122 00000000ffffffff
head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5490, tgid 1905245577 (syz-executor.0), ts 5492, free_ts 87323640300
page last free pid 4525 tgid 4525 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
discard_slab mm/slub.c:2437 [inline]
__put_partials+0xeb/0x130 mm/slub.c:2906
put_cpu_partial+0x17c/0x250 mm/slub.c:2981
__slab_free+0x2ea/0x3d0 mm/slub.c:4151
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x5e/0xc0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc+0x174/0x340 mm/slub.c:3852
kmem_cache_zalloc include/linux/slab.h:739 [inline]
lsm_file_alloc security/security.c:649 [inline]
security_file_alloc+0x28/0x130 security/security.c:2709
init_file+0x99/0x200 fs/file_table.c:152
alloc_empty_file+0xb8/0x1d0 fs/file_table.c:206
path_openat+0xfb/0x3240 fs/namei.c:3785
do_filp_open+0x235/0x490 fs/namei.c:3826
do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1432

Memory state around the buggy address:
ffff888076df3c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888076df3c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888076df3d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888076df3d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888076df3e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================


Tested on:

commit: ed30a4a5 Linux 6.9-rc5
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=12ba37b8980000
kernel config: https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc
dashboard link: https://syzkaller.appspot.com/bug?extid=aa6df9d3b383bf5f047f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=12a532e0980000

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