jfs_flush_journal: synclist not empty
=====================================================
BUG: KMSAN: uninit-value in hex_dump_to_buffer+0xefb/0xf30 lib/hexdump.c:171
 hex_dump_to_buffer+0xefb/0xf30 lib/hexdump.c:171
 print_hex_dump+0x10d/0x330 lib/hexdump.c:276
 jfs_flush_journal+0x13ed/0x1670 fs/jfs/jfs_logmgr.c:1598
 lmLogShutdown+0xcd/0xc30 fs/jfs/jfs_logmgr.c:1643
 lmLogClose+0x422/0xc60 fs/jfs/jfs_logmgr.c:1460
 jfs_umount+0x4cf/0x720 fs/jfs/jfs_umount.c:114
 jfs_put_super+0x112/0x3d0 fs/jfs/super.c:194
 generic_shutdown_super+0x1ad/0x4b0 fs/super.c:642
 kill_block_super+0x42/0xd0 fs/super.c:1710
 deactivate_locked_super+0xcb/0x3c0 fs/super.c:473
 deactivate_super+0x12f/0x140 fs/super.c:506
 cleanup_mnt+0x6fb/0x780 fs/namespace.c:1431
 __cleanup_mnt+0x22/0x30 fs/namespace.c:1438
 task_work_run+0x209/0x2b0 kernel/task_work.c:227
 resume_user_mode_work+0x105/0x160 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x7b/0xb0 kernel/entry/common.c:218
 do_syscall_64+0xe6/0x1b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 hex_dump_to_buffer+0xef4/0xf30 lib/hexdump.c:173
 print_hex_dump+0x10d/0x330 lib/hexdump.c:276
 jfs_flush_journal+0x13ed/0x1670 fs/jfs/jfs_logmgr.c:1598
 lmLogShutdown+0xcd/0xc30 fs/jfs/jfs_logmgr.c:1643
 lmLogClose+0x422/0xc60 fs/jfs/jfs_logmgr.c:1460
 jfs_umount+0x4cf/0x720 fs/jfs/jfs_umount.c:114
 jfs_put_super+0x112/0x3d0 fs/jfs/super.c:194
 generic_shutdown_super+0x1ad/0x4b0 fs/super.c:642
 kill_block_super+0x42/0xd0 fs/super.c:1710
 deactivate_locked_super+0xcb/0x3c0 fs/super.c:473
 deactivate_super+0x12f/0x140 fs/super.c:506
 cleanup_mnt+0x6fb/0x780 fs/namespace.c:1431
 __cleanup_mnt+0x22/0x30 fs/namespace.c:1438
 task_work_run+0x209/0x2b0 kernel/task_work.c:227
 resume_user_mode_work+0x105/0x160 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x7b/0xb0 kernel/entry/common.c:218
 do_syscall_64+0xe6/0x1b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4153 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 kmem_cache_alloc_noprof+0x81b/0xec0 mm/slub.c:4203
 add_delayed_ref+0x1bb/0x3ec0 fs/btrfs/delayed-ref.c:1011
 btrfs_add_delayed_tree_ref+0xd8/0x190 fs/btrfs/delayed-ref.c:1097
 btrfs_free_tree_block+0x316/0x1450 fs/btrfs/extent-tree.c:3434
 btrfs_force_cow_block+0x1d1b/0x2b10 fs/btrfs/ctree.c:555
 btrfs_cow_block+0x9ed/0xbc0 fs/btrfs/ctree.c:688
 btrfs_search_slot+0x1727/0x4f40 fs/btrfs/ctree.c:2088
 btrfs_update_root+0xec/0x1230 fs/btrfs/root-tree.c:144
 commit_fs_roots+0x875/0xf40 fs/btrfs/transaction.c:1516
 btrfs_commit_transaction+0x2010/0x6fc0 fs/btrfs/transaction.c:2442
 btrfs_sync_fs+0x264/0x890 fs/btrfs/super.c:1044
 sync_filesystem+0x2d9/0x3c0 fs/sync.c:66
 generic_shutdown_super+0x8d/0x4b0 fs/super.c:621
 kill_anon_super+0x49/0x2c0 fs/super.c:1237
 btrfs_kill_super+0x3d/0x70 fs/btrfs/super.c:2103
 deactivate_locked_super+0xcb/0x3c0 fs/super.c:473
 deactivate_super+0x12f/0x140 fs/super.c:506
 cleanup_mnt+0x6fb/0x780 fs/namespace.c:1431
 __cleanup_mnt+0x22/0x30 fs/namespace.c:1438
 task_work_run+0x209/0x2b0 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xbdc/0x4120 kernel/exit.c:953
 do_group_exit+0x259/0x390 kernel/exit.c:1102
 get_signal+0x23c0/0x2a20 kernel/signal.c:3034
 arch_do_signal_or_restart+0x53/0xbe0 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x6c/0xb0 kernel/entry/common.c:218
 do_syscall_64+0xe6/0x1b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 6500 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller-00142-g4856ebd99715 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
=====================================================