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BUG: KASAN: slab-use-after-free in txEnd+0x32d/0x530
Write of size 8 at addr ffff8881b8507840 by task jfsCommit/128

CPU: 1 UID: 0 PID: 128 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_address_description+0x55/0x1e0
 print_report+0x58/0x70
 kasan_report+0x117/0x150
 kasan_check_range+0x264/0x2c0
 txEnd+0x32d/0x530
 jfs_lazycommit+0x5d6/0xac0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Allocated by task 10005:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x321/0x600
 lmLogOpen+0x2d1/0xf90
 jfs_mount_rw+0xf3/0x670
 jfs_fill_super+0x769/0xda0
 get_tree_bdev_flags+0x430/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 9579:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x40/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c5/0x650
 lmLogClose+0x296/0x530
 jfs_umount+0x2da/0x3b0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x13d/0x2d0
 kill_block_super+0x44/0xa0
 deactivate_locked_super+0xbc/0x110
 cleanup_mnt+0x3d3/0x460
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0x204/0x770
 do_syscall_64+0x328/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff8881b8507800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 64 bytes inside of
 freed 1024-byte region [ffff8881b8507800, ffff8881b8507c00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b8500
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff888100041dc0 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff888100041dc0 dead000000000100 dead000000000122
head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000
head: 057ff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5356, tgid 5356 (dhcpcd-run-hook), ts 29268305546
 post_alloc_hook+0x1f9/0x250
 get_page_from_freelist+0x2209/0x2280
 __alloc_frozen_pages_noprof+0x217/0x5a0
 allocate_slab+0x7d/0x620
 refill_objects+0x2d5/0x350
 __pcs_replace_empty_main+0x2c8/0x6c0
 __kmalloc_noprof+0x47b/0x720
 tomoyo_init_log+0x1aae/0x1fa0
 tomoyo_supervisor+0x35f/0x1560
 tomoyo_env_perm+0x151/0x1f0
 tomoyo_find_next_domain+0x1332/0x1a90
 tomoyo_bprm_check_security+0x11b/0x180
 security_bprm_check+0x85/0x240
 bprm_execve+0x888/0x1590
 do_execveat_common+0x4f4/0x670
 __x64_sys_execve+0x97/0xc0
page last free pid 1 tgid 1 ts 14582899551 stack trace:
 free_pages_prepare+0x9eb/0xaf0
 __free_contig_range_common+0x174/0x340
 destroy_args+0x4e5/0x570
 debug_vm_pgtable+0x3f8/0x410
 do_one_initcall+0x250/0x870
 do_initcall_level+0x10a/0x1a0
 do_initcalls+0x59/0xa0
 kernel_init_freeable+0x29d/0x3e0
 kernel_init+0x22/0x1d0
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30

Memory state around the buggy address:
 ffff8881b8507700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881b8507780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881b8507800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff8881b8507880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881b8507900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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