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BUG: KASAN: use-after-free in lbmIODone+0xf9e/0x1530 fs/jfs/jfs_logmgr.c:2193
Read of size 4 at addr ffff88809754fe08 by task ksoftirqd/0/9

CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.9.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d6/0x29e lib/dump_stack.c:118
 print_address_description+0x66/0x620 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report+0x132/0x1d0 mm/kasan/report.c:530
 lbmIODone+0xf9e/0x1530 fs/jfs/jfs_logmgr.c:2193
 req_bio_endio block/blk-core.c:259 [inline]
 blk_update_request+0x7b7/0x1510 block/blk-core.c:1577
 blk_mq_end_request+0x39/0x70 block/blk-mq.c:562
 blk_done_softirq+0x392/0x410 block/blk-mq.c:586
 __do_softirq+0x256/0x6d5 kernel/softirq.c:298
 run_ksoftirqd+0xa1/0x130 kernel/softirq.c:652
 smpboot_thread_fn+0x572/0x970 kernel/smpboot.c:165
 kthread+0x37e/0x3a0 drivers/block/aoe/aoecmd.c:1234
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Allocated by task 4886:
 kasan_save_stack mm/kasan/common.c:48 [inline]
 kasan_set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc+0x100/0x130 mm/kasan/common.c:461
 kmem_cache_alloc_trace+0x1e4/0x2e0 mm/slab.c:3554
 kmalloc include/linux/slab.h:554 [inline]
 lbmLogInit fs/jfs/jfs_logmgr.c:1829 [inline]
 lmLogInit+0x26f/0x1750 fs/jfs/jfs_logmgr.c:1278
 open_inline_log fs/jfs/jfs_logmgr.c:1183 [inline]
 lmLogOpen+0x508/0xf60 fs/jfs/jfs_logmgr.c:1077
 jfs_mount_rw+0x92/0x4a0 fs/jfs/jfs_mount.c:259
 jfs_fill_super+0x59e/0x9b0 fs/jfs/super.c:571
 mount_bdev+0x24f/0x360 fs/super.c:1417
 legacy_get_tree+0xea/0x180 fs/fs_context.c:592
 vfs_get_tree+0x88/0x270 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x179d/0x29e0 fs/namespace.c:3192
 do_mount fs/namespace.c:3205 [inline]
 __do_sys_mount fs/namespace.c:3413 [inline]
 __se_sys_mount+0x126/0x180 fs/namespace.c:3390
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 6864:
 kasan_save_stack mm/kasan/common.c:48 [inline]
 kasan_set_track+0x3d/0x70 mm/kasan/common.c:56
 kasan_set_free_info+0x17/0x30 mm/kasan/generic.c:355
 __kasan_slab_free+0xdd/0x110 mm/kasan/common.c:422
 __cache_free mm/slab.c:3422 [inline]
 kfree+0x113/0x200 mm/slab.c:3760
 lbmLogShutdown fs/jfs/jfs_logmgr.c:1872 [inline]
 lmLogShutdown+0x575/0x780 fs/jfs/jfs_logmgr.c:1691
 lmLogClose+0x269/0x480 fs/jfs/jfs_logmgr.c:1467
 jfs_put_super+0x68/0x100 fs/jfs/super.c:194
 generic_shutdown_super+0x120/0x2a0 fs/super.c:464
 kill_block_super+0x79/0xd0 fs/super.c:1444
 deactivate_locked_super+0xa7/0xf0 fs/super.c:335
 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1118
 task_work_run+0x137/0x1c0 kernel/task_work.c:141
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:165 [inline]
 exit_to_user_mode_prepare+0x11a/0x1e0 kernel/entry/common.c:192
 syscall_exit_to_user_mode+0x82/0x1d0 kernel/entry/common.c:267
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Last call_rcu():
 kasan_save_stack+0x27/0x50 mm/kasan/common.c:48
 kasan_record_aux_stack+0x7b/0xb0 mm/kasan/generic.c:346
 __call_rcu kernel/rcu/tree.c:2896 [inline]
 call_rcu+0x141/0x830 kernel/rcu/tree.c:2970
 rhashtable_rehash_table lib/rhashtable.c:345 [inline]
 rht_deferred_worker+0x17b5/0x1bc0 lib/rhashtable.c:429
 process_one_work+0x789/0xfc0 kernel/workqueue.c:2269
 worker_thread+0xaa4/0x1460 kernel/workqueue.c:2415
 kthread+0x37e/0x3a0 drivers/block/aoe/aoecmd.c:1234
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the object at ffff88809754fe00
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 8 bytes inside of
 192-byte region [ffff88809754fe00, ffff88809754fec0)
The buggy address belongs to the page:
page:0000000022677d4f refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809754f200 pfn:0x9754f
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea0002772d08 ffffea0002823348 ffff8880aa440000
raw: ffff88809754f200 ffff88809754f000 000000010000000d 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809754fd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809754fd80: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809754fe00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88809754fe80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88809754ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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