NMI backtrace for cpu 0
CPU: 0 PID: 32 Comm: khungtaskd Not tainted 6.7.0-rc7 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xe7a/0x1100 kernel/hung_task.c:379
 kthread+0x2cc/0x3b0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4522 Comm: systemd-journal Not tainted 6.7.0-rc7 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:unwind_next_frame+0x4df/0x2220 arch/x86/kernel/unwind_orc.c:505
Code: 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 7d 18 00 00 45 0f b6 7c 24 05 <31> ff 41 83 e7 07 44 89 fe e8 53 b5 4b 00 45 84 ff 0f 84 95 fe ff
RSP: 0000:ffffc900026ff528 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900026ff5a0 RCX: ffffffff81394c34
RDX: 0000000000000001 RSI: ffffffff81395b2d RDI: 0000000000000006
RBP: 0000000000000001 R08: 0000000000000006 R09: ffffffff81c4b482
R10: ffffffff81c4ad0e R11: 0000000000000000 R12: ffffffff8fb00944
R13: ffffffff8fb00949 R14: ffffc900026ff5d5 R15: 0000000000000002
FS:  00007fb6f2bf3900(0000) GS:ffff888135c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6f0e56720 CR3: 00000000194fd000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 arch_stack_walk+0xe0/0x160 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
 kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 __kasan_slab_alloc+0x7f/0x90 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:763 [inline]
 slab_alloc_node mm/slab.c:3237 [inline]
 slab_alloc mm/slab.c:3246 [inline]
 __kmem_cache_alloc_lru mm/slab.c:3423 [inline]
 kmem_cache_alloc+0x2aa/0x370 mm/slab.c:3432
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 jbd2_alloc_handle include/linux/jbd2.h:1595 [inline]
 new_handle fs/jbd2/transaction.c:476 [inline]
 jbd2__journal_start+0x195/0x850 fs/jbd2/transaction.c:503
 __ext4_journal_start_sb+0x342/0x5d0 fs/ext4/ext4_jbd2.c:112
 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline]
 ext4_dirty_inode+0xa5/0x130 fs/ext4/inode.c:5962
 __mark_inode_dirty+0x1e0/0xd80 fs/fs-writeback.c:2452
 generic_update_time+0xcb/0xf0 fs/inode.c:1943
 inode_update_time fs/inode.c:1956 [inline]
 __file_update_time fs/inode.c:2144 [inline]
 file_update_time+0x132/0x160 fs/inode.c:2174
 ext4_page_mkwrite+0x352/0x16b0 fs/ext4/inode.c:6083
 do_page_mkwrite+0x181/0x390 mm/memory.c:2944
 wp_page_shared mm/memory.c:3339 [inline]
 do_wp_page+0x793/0x3580 mm/memory.c:3479
 handle_pte_fault mm/memory.c:5055 [inline]
 __handle_mm_fault+0x15b8/0x3c40 mm/memory.c:5180
 handle_mm_fault+0x3c2/0xa30 mm/memory.c:5345
 do_user_addr_fault+0x2ed/0xff0 arch/x86/mm/fault.c:1364
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x99/0x180 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fb6f33c5fde
Code: 40 38 00 00 00 00 4c 89 e8 48 f7 f1 48 8b 85 d8 00 00 00 48 c1 e2 04 48 01 d0 49 89 d5 48 8b 50 08 48 85 d2 0f 85 32 03 00 00 <4c> 89 00 48 8b 85 d8 00 00 00 4e 89 44 28 08 48 8b 85 d0 00 00 00
RSP: 002b:00007fffb2f8dc50 EFLAGS: 00010246
RAX: 00007fb6f0e56720 RBX: 000055e64147e320 RCX: 000000000000acf8
RDX: 0000000000000000 RSI: 000055e64147e320 RDI: 00007fb6f0efe8e0
RBP: 000055e6414bd890 R08: 00000000000fe8a0 R09: 00000000000fe8a0
R10: 0000000000000002 R11: 7fffffffffffffff R12: 0000000000000025
R13: 0000000000055130 R14: 0000000000000000 R15: 00007fffb2f8dc70
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 3.714 msecs