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: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_fast_syscall_32+0xbd/0x110 arch/x86/entry/syscall_32.c:309
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

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: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_fast_syscall_32+0xbd/0x110 arch/x86/entry/syscall_32.c:309
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:4989
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2301
 alloc_frozen_pages_noprof+0xf7/0x200 mm/mempolicy.c:2372
 alloc_slab_page mm/slub.c:2450 [inline]
 allocate_slab+0x24d/0x1210 mm/slub.c:2618
 new_slab mm/slub.c:2672 [inline]
 ___slab_alloc+0xfec/0x3480 mm/slub.c:3858
 __slab_alloc mm/slub.c:3948 [inline]
 __slab_alloc_node mm/slub.c:4023 [inline]
 slab_alloc_node mm/slub.c:4184 [inline]
 kmem_cache_alloc_noprof+0x91b/0xec0 mm/slub.c:4203
 fdb_create+0x1e3/0x1be0 net/bridge/br_fdb.c:402
 br_fdb_update+0x2e2/0xb80 net/bridge/br_fdb.c:939
 br_handle_frame_finish+0x80b/0x2910 net/bridge/br_input.c:144
 br_nf_hook_thresh+0x51d/0x5d0 net/bridge/br_netfilter_hooks.c:-1
 br_nf_pre_routing_finish_ipv6+0xbff/0xf50 net/bridge/br_netfilter_ipv6.c:-1
 NF_HOOK include/linux/netfilter.h:314 [inline]
 br_nf_pre_routing_ipv6+0x3d7/0x6c0 net/bridge/br_netfilter_ipv6.c:184
 br_nf_pre_routing+0xf82/0x1e50 net/bridge/br_netfilter_hooks.c:508
 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:282 [inline]
 br_handle_frame+0x13ef/0x2190 net/bridge/br_input.c:433
 __netif_receive_skb_core+0x202e/0x70c0 net/core/dev.c:5773
 __netif_receive_skb_one_core net/core/dev.c:5885 [inline]
 __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6000
 process_backlog+0x485/0xa00 net/core/dev.c:6352
 __napi_poll+0xda/0x9c0 net/core/dev.c:7324
 napi_poll net/core/dev.c:7388 [inline]
 net_rx_action+0xa0a/0x18f0 net/core/dev.c:7510
 handle_softirqs+0x169/0x6e0 kernel/softirq.c:579
 __do_softirq+0x14/0x1b kernel/softirq.c:613

CPU: 0 UID: 0 PID: 5807 Comm: syz-executor Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
=====================================================