==================================================================
BUG: KASAN: slab-use-after-free in txEnd+0x32d/0x530
Write of size 8 at addr ffff888175cd6840 by task jfsCommit/117

CPU: 0 UID: 0 PID: 117 Comm: jfsCommit Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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_report+0xba/0x230
 kasan_report+0x117/0x150
 kasan_check_range+0x264/0x2c0
 txEnd+0x32d/0x530
 jfs_lazycommit+0x5b8/0xaa0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Allocated by task 6178:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x3d1/0x6e0
 lmLogOpen+0x2d1/0xfa0
 jfs_mount_rw+0xee/0x670
 jfs_fill_super+0x754/0xd80
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x329/0xa50
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5841:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1be/0x650
 lmLogClose+0x297/0x520
 jfs_umount+0x2ef/0x3c0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x135/0x2c0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x2b7/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888175cd6800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 64 bytes inside of
 freed 1024-byte region [ffff888175cd6800, ffff888175cd6c00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x175cd0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x57ff00000000040(head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000040 ffff888100041dc0 0000000000000000 0000000000000001
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 057ff00000000040 ffff888100041dc0 0000000000000000 0000000000000001
head: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
head: 057ff00000000003 ffffea0005d73401 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5956, tgid 5955 (syz.0.26), ts 69185649070, free_ts 68949083281
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 allocate_slab+0x7a/0x3a0
 ___slab_alloc+0xd82/0x1760
 __slab_alloc+0x65/0x100
 __kmalloc_node_noprof+0x5bc/0x7f0
 alloc_slab_obj_exts+0x3e/0x100
 __memcg_slab_post_alloc_hook+0x330/0x730
 __kmalloc_node_track_caller_noprof+0x5d6/0x7f0
 kstrdup+0x42/0x100
 alloc_vfsmnt+0xeb/0x430
 vfs_create_mount+0x69/0x320
 btrfs_get_tree+0xab4/0x1920
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x329/0xa50
page last free pid 5963 tgid 5963 stack trace:
 __free_frozen_pages+0xbb9/0xd10
 __slab_free+0x2ce/0x320
 qlist_free_all+0x97/0x100
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x370/0x6e0
 getname_flags+0xb7/0x540
 __x64_sys_symlinkat+0x7a/0xb0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888175cd6700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888175cd6780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888175cd6800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff888175cd6880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888175cd6900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
