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
 jfs_umount+0x1e3/0x720 fs/jfs/jfs_umount.c:58
 jfs_put_super+0x112/0x3d0 fs/jfs/super.c:194
 generic_shutdown_super+0x1ad/0x4b0 fs/super.c:643
 kill_block_super+0x42/0xd0 fs/super.c:1753
 deactivate_locked_super+0xcb/0x3c0 fs/super.c:474
 deactivate_super+0x12f/0x140 fs/super.c:507
 cleanup_mnt+0x6fb/0x780 fs/namespace.c:1417
 __cleanup_mnt+0x22/0x30 fs/namespace.c:1424
 task_work_run+0x209/0x2b0 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0x2a6/0x330 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x1e3/0x210 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
 jfs_umount+0x1e3/0x720 fs/jfs/jfs_umount.c:58
 jfs_put_super+0x112/0x3d0 fs/jfs/super.c:194
 generic_shutdown_super+0x1ad/0x4b0 fs/super.c:643
 kill_block_super+0x42/0xd0 fs/super.c:1753
 deactivate_locked_super+0xcb/0x3c0 fs/super.c:474
 deactivate_super+0x12f/0x140 fs/super.c:507
 cleanup_mnt+0x6fb/0x780 fs/namespace.c:1417
 __cleanup_mnt+0x22/0x30 fs/namespace.c:1424
 task_work_run+0x209/0x2b0 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0x2a6/0x330 kernel/entry/common.c:114
 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
 do_syscall_64+0x1e3/0x210 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:4154 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_noprof+0x81b/0xec0 mm/slub.c:4204
 mempool_alloc_slab+0x36/0x50 mm/mempool.c:559
 mempool_alloc_noprof+0xfc/0x540 mm/mempool.c:402
 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline]
 __get_metapage+0xa1d/0x1790 fs/jfs/jfs_metapage.c:758
 diWrite+0x58f/0x2190 fs/jfs/jfs_imap.c:639
 txCommit+0xcc0/0x93d0 fs/jfs/jfs_txnmgr.c:1255
 jfs_mkdir+0x1271/0x13a0 fs/jfs/namei.c:290
 vfs_mkdir+0x4e7/0x850 fs/namei.c:4366
 ovl_do_mkdir fs/overlayfs/overlayfs.h:249 [inline]
 ovl_workdir_create+0x760/0xf60 fs/overlayfs/super.c:330
 ovl_make_workdir fs/overlayfs/super.c:669 [inline]
 ovl_get_workdir+0x6f8/0x2740 fs/overlayfs/super.c:827
 ovl_fill_super+0x1613/0x6230 fs/overlayfs/super.c:1406
 vfs_get_super fs/super.c:1323 [inline]
 get_tree_nodev+0x164/0x360 fs/super.c:1342
 ovl_get_tree+0x35/0x40 fs/overlayfs/params.c:701
 vfs_get_tree+0xb3/0x5c0 fs/super.c:1802
 do_new_mount+0x738/0x1610 fs/namespace.c:3885
 path_mount+0x6db/0x1e90 fs/namespace.c:4209
 do_mount fs/namespace.c:4222 [inline]
 __do_sys_mount fs/namespace.c:4433 [inline]
 __se_sys_mount+0x6eb/0x7d0 fs/namespace.c:4410
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4410
 x64_sys_call+0xfa7/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 14771 Comm: syz-executor Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
=====================================================