INFO: task syz.2.540:1991 blocked for more than 122 seconds.
      Not tainted 6.12.30-syzkaller-g437e1d666d1d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.540       state:D stack:0     pid:1991  tgid:1985  ppid:290    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x132b/0x1e00 kernel/sched/core.c:7789
 __schedule_loop kernel/sched/core.c:7870 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7885
 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:419 [inline]
 do_coredump+0x7cf/0x2bd0 fs/coredump.c:576
 get_signal+0x11fd/0x14f0 kernel/signal.c:2919
 arch_do_signal_or_restart+0x96/0x720 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:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x58/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0003:0x7ffd557dcbd0
RSP: 0003:00007fb8e9db608c EFLAGS: 00050b52
RAX: 0000000000000000 RBX: 0000000029969148 RCX: 00007fb8e9db6080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 000000000000003b R08: 00007fb8e9db6080 R09: 00000000ea9af0c0
R10: ffffffff000015e6 R11: 00007fb8e9d32c80 R12: 000000000000003b
R13: 0000000029975a1d R14: 0000000000000000 R15: 0000000000000000
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.30-syzkaller-g437e1d666d1d #0 a7e852bab5516ec71c4837645977b8b84c4f3040
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bf/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xd8f/0xed0 kernel/hung_task.c:423
 kthread+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8537 Comm: syz.3.2718 Not tainted 6.12.30-syzkaller-g437e1d666d1d #0 a7e852bab5516ec71c4837645977b8b84c4f3040
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:folio_batch_add include/linux/pagevec.h:77 [inline]
RIP: 0010:free_pages_and_swap_cache+0x239/0x460 mm/swap_state.c:331
Code: 1e 0f 87 54 01 00 00 e8 65 4d ac ff 48 8b 44 24 38 48 8d 1c d8 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 5d 49 02 00 4c 89 2b 41 0f b6 de bf 1f 00 00 00
RSP: 0018:ffffc9000cc87200 EFLAGS: 00000246
RAX: 1ffff92001990e67 RBX: ffffc9000cc87338 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 000000000000001a RDI: 000000000000001f
RBP: ffffc9000cc874a0 R08: ffffea0004a0a007 R09: 1ffffd4000941400
R10: dffffc0000000000 R11: fffff94000941401 R12: ffff888110f4de70
R13: ffffea0004a0a000 R14: 000000000000001b R15: 00000000000001cc
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa090183178 CR3: 0000000101f9e000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
 tlb_flush_mmu+0x7ce/0xaf0 mm/mmu_gather.c:373
 zap_pte_range mm/memory.c:1724 [inline]
 zap_pmd_range mm/memory.c:1763 [inline]
 zap_pud_range mm/memory.c:1792 [inline]
 zap_p4d_range mm/memory.c:1813 [inline]
 unmap_page_range+0x3803/0x3f80 mm/memory.c:1834
 unmap_single_vma mm/memory.c:1880 [inline]
 unmap_vmas+0x2c5/0x3e0 mm/memory.c:1924
 exit_mmap+0x25b/0xb60 mm/mmap.c:1962
 __mmput+0x93/0x320 kernel/fork.c:1348
 mmput+0x55/0x170 kernel/fork.c:1371
 exit_mm kernel/exit.c:574 [inline]
 do_exit+0x910/0x2630 kernel/exit.c:931
 do_group_exit+0x22a/0x300 kernel/exit.c:1094
 get_signal+0x139d/0x14f0 kernel/signal.c:2934
 arch_do_signal_or_restart+0x96/0x720 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:328 [inline]
 irqentry_exit_to_user_mode+0x4e/0xb0 kernel/entry/common.c:231
 irqentry_exit+0x16/0x60 kernel/entry/common.c:334
 exc_page_fault+0x66/0xc0 arch/x86/mm/fault.c:1542
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7ff95cf8e9b1
Code: Unable to access opcode bytes at 0x7ff95cf8e987.
RSP: 002b:00000000fffffd10 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007ff95d1b6080 RCX: 00007ff95cf8e9a9
RDX: 0000000000000000 RSI: 00000000fffffd10 RDI: 0000000001000000
RBP: 00007ff95d010d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff95d1b6080 R15: 00007ffe89ad1848
 </TASK>