==================================================================
BUG: KASAN: slab-use-after-free in lbmIODone+0xedc/0x1200 fs/jfs/jfs_logmgr.c:2184
Read of size 4 at addr ffff88801c949008 by task kworker/u32:2/44
CPU: 0 PID: 44 Comm: kworker/u32:2 Not tainted 6.9.0-rc6-syzkaller-00005-gb947cc5bf6d7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: loop2 loop_workfn
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
lbmIODone+0xedc/0x1200 fs/jfs/jfs_logmgr.c:2184
bio_endio+0x5f0/0x700 block/bio.c:1603
req_bio_endio block/blk-mq.c:786 [inline]
blk_update_request+0x693/0x1820 block/blk-mq.c:931
blk_mq_end_request+0x4f/0x90 block/blk-mq.c:1054
lo_complete_rq+0x232/0x2f0 drivers/block/loop.c:366
blk_complete_reqs+0xae/0xf0 block/blk-mq.c:1129
__do_softirq+0x218/0x922 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:633 [inline]
irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:raise_softirq+0x88/0xc0 kernel/softirq.c:690
Code: 42 00 8b 7c 24 04 e8 77 f8 ff ff 65 8b 05 38 a6 b1 7e a9 00 ff ff 00 74 16 e8 74 ac 42 00 9c 58 f6 c4 02 75 2a fb 48 83 c4 08 cc cc cc cc 48 c7 c7 00 4d 0b 8b e8 87 63 89 09 65 48 8b 3d cf
RSP: 0018:ffffc900009c7a48 EFLAGS: 00000286
RAX: 0000000000000006 RBX: 0000000015f9a401 RCX: 1ffffffff27c878a
RDX: 0000000000000000 RSI: ffffffff8b0cae00 RDI: ffffffff8b6f55a0
RBP: 000000000003a480 R08: 0000000000000001 R09: fffffbfff27bb651
R10: ffffffff93ddb28f R11: 0000000000000000 R12: 0000000000000000
R13: ffff888021a0af88 R14: ffff888021902dc8 R15: ffff888021a0b090
blk_mq_raise_softirq block/blk-mq.c:1191 [inline]
blk_mq_complete_request_remote+0x6db/0x800 block/blk-mq.c:1215
blk_mq_complete_request+0x16/0xb0 block/blk-mq.c:1231
loop_handle_cmd drivers/block/loop.c:1924 [inline]
loop_process_work+0x774/0x20c0 drivers/block/loop.c:1942
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 7357:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
kmalloc include/linux/slab.h:628 [inline]
lbmLogInit fs/jfs/jfs_logmgr.c:1822 [inline]
lmLogInit+0x3ec/0x1a90 fs/jfs/jfs_logmgr.c:1270
open_inline_log fs/jfs/jfs_logmgr.c:1175 [inline]
lmLogOpen+0x7e1/0x1400 fs/jfs/jfs_logmgr.c:1069
jfs_mount_rw+0x2ea/0x700 fs/jfs/jfs_mount.c:257
jfs_fill_super+0x9d6/0xd20 fs/jfs/super.c:565
mount_bdev+0x1e3/0x2d0 fs/super.c:1658
legacy_get_tree+0x109/0x220 fs/fs_context.c:662
vfs_get_tree+0x8f/0x380 fs/super.c:1779
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x14e6/0x1f20 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__x64_sys_mount+0x297/0x320 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7357:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:240 [inline]
__kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2106 [inline]
slab_free mm/slub.c:4280 [inline]
kfree+0x129/0x390 mm/slub.c:4390
lbmLogShutdown fs/jfs/jfs_logmgr.c:1865 [inline]
lmLogShutdown+0x379/0x780 fs/jfs/jfs_logmgr.c:1684
lmLogClose+0x57b/0x710 fs/jfs/jfs_logmgr.c:1460
jfs_umount+0x2f0/0x440 fs/jfs/jfs_umount.c:114
jfs_put_super+0x88/0x1d0 fs/jfs/super.c:194
generic_shutdown_super+0x159/0x3d0 fs/super.c:641
kill_block_super+0x3b/0x90 fs/super.c:1675
deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
deactivate_super+0xde/0x100 fs/super.c:505
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14e/0x250 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88801c949000
which belongs to the cache kmalloc-192 of size 192
The buggy address is located 8 bytes inside of
freed 192-byte region [ffff88801c949000, ffff88801c9490c0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c949
anon flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000800 ffff888015042a00 0000000000000000 dead000000000001
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 6949, tgid 608980566 (syz-executor.0), ts 6949, free_ts 90675353197
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
__alloc_pages+0x22b/0x2460 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 mm/slub.c:2175 [inline]
allocate_slab mm/slub.c:2338 [inline]
new_slab+0xcc/0x3a0 mm/slub.c:2391
___slab_alloc+0x66d/0x1790 mm/slub.c:3525
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610
__slab_alloc_node mm/slub.c:3663 [inline]
slab_alloc_node mm/slub.c:3835 [inline]
__do_kmalloc_node mm/slub.c:3965 [inline]
__kmalloc_node+0x36e/0x480 mm/slub.c:3973
kmalloc_array_node include/linux/slab.h:726 [inline]
kcalloc_node include/linux/slab.h:731 [inline]
memcg_alloc_slab_cgroups+0xa9/0x180 mm/memcontrol.c:3015
__memcg_slab_post_alloc_hook+0xa3/0x370 mm/slub.c:1960
memcg_slab_post_alloc_hook mm/slub.c:1983 [inline]
slab_post_alloc_hook mm/slub.c:3807 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc+0x310/0x320 mm/slub.c:3852
kmem_cache_zalloc include/linux/slab.h:739 [inline]
alloc_buffer_head+0x21/0x160 fs/buffer.c:3001
folio_alloc_buffers+0x2c8/0x7d0 fs/buffer.c:924
create_empty_buffers+0x36/0x480 fs/buffer.c:1650
ext4_block_write_begin+0xccd/0xef0 fs/ext4/inode.c:1038
ext4_da_write_begin+0x410/0x8f0 fs/ext4/inode.c:2894
generic_perform_write+0x272/0x620 mm/filemap.c:3974
page last free pid 4679 tgid 4679 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+0x527/0xb10 mm/page_alloc.c:2347
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
__put_partials+0x14c/0x170 mm/slub.c:2906
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 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+0x136/0x320 mm/slub.c:3852
getname_flags.part.0+0x50/0x4f0 fs/namei.c:139
getname_flags include/linux/audit.h:322 [inline]
getname+0x8f/0xe0 fs/namei.c:218
do_sys_openat2+0x104/0x1e0 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+0x175/0x210 fs/open.c:1432
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88801c948f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88801c948f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801c949000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801c949080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
ffff88801c949100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 8b 7c 24 04 mov 0x4(%rsp),%edi
4: e8 77 f8 ff ff call 0xfffff880
9: 65 8b 05 38 a6 b1 7e mov %gs:0x7eb1a638(%rip),%eax # 0x7eb1a648
10: a9 00 ff ff 00 test $0xffff00,%eax
15: 74 16 je 0x2d
17: e8 74 ac 42 00 call 0x42ac90
1c: 9c pushf
1d: 58 pop %rax
1e: f6 c4 02 test $0x2,%ah
21: 75 2a jne 0x4d
23: fb sti
24: 48 83 c4 08 add $0x8,%rsp
* 28: c3 ret <-- trapping instruction
29: cc int3
2a: cc int3
2b: cc int3
2c: cc int3
2d: 48 c7 c7 00 4d 0b 8b mov $0xffffffff8b0b4d00,%rdi
34: e8 87 63 89 09 call 0x98963c0
39: 65 gs
3a: 48 rex.W
3b: 8b .byte 0x8b
3c: 3d .byte 0x3d
3d: cf iret