INFO: task syz-executor.1:30771 blocked for more than 143 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26760 pid:30771 ppid: 6575 flags:0x00024004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 io_wq_exit_workers fs/io-wq.c:1176 [inline] io_wq_put_and_exit+0x4b2/0xd20 fs/io-wq.c:1211 io_uring_clean_tctx fs/io_uring.c:9675 [inline] io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9755 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x265/0x2a30 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x2160 kernel/signal.c:2868 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe84f6c5739 RSP: 002b:00007fe84cc1b188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000800 RBX: 00007fe84f7ca038 RCX: 00007fe84f6c5739 RDX: 0000000000000000 RSI: 0000000000006b46 RDI: 0000000000000006 RBP: 00007fe84f71fcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe84f7ca038 R13: 00007ffcf6e03eff R14: 00007fe84cc1b300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b97d3e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6457: 3 locks held by kworker/u4:7/9628: #0: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:474 #1: ffff8880b9c1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x16a/0x480 kernel/sched/psi.c:871 #2: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:474 [inline] #2: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1317 [inline] #2: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1620 [inline] #2: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26f0 kernel/sched/core.c:6201 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 2961 Comm: systemd-journal Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__nr_to_section include/linux/mmzone.h:1349 [inline] RIP: 0010:__pfn_to_section include/linux/mmzone.h:1433 [inline] RIP: 0010:get_pageblock_bitmap mm/page_alloc.c:470 [inline] RIP: 0010:__get_pfnblock_flags_mask mm/page_alloc.c:495 [inline] RIP: 0010:get_pfnblock_migratetype mm/page_alloc.c:521 [inline] RIP: 0010:free_unref_page_prepare mm/page_alloc.c:3318 [inline] RIP: 0010:free_unref_page_prepare mm/page_alloc.c:3310 [inline] RIP: 0010:free_unref_page+0x88/0x690 mm/page_alloc.c:3394 Code: 0e 48 85 c0 0f 84 8c 03 00 00 4c 89 f2 48 c1 ea 16 48 8d 2c d0 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 c3 04 00 00 48 8b 45 00 48 85 c0 0f 84 59 03 00 00 83 e3 7f RSP: 0018:ffffc90002c07ce0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 0000000000000000 RDX: 1ffff11047ffe000 RSI: 00000000000000ff RDI: ffffed1010048000 RBP: ffff88823fff0000 R08: 0000000000000000 R09: ffffed1010047c00 R10: fffffbfff208e2fc R11: 0000000000086089 R12: ffffea0002008f80 R13: 0000000000000001 R14: 000000000008023e R15: ffffea0002008f80 FS: 00007f5a069e48c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5a03ffc000 CR3: 0000000077710000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: slab_destroy mm/slab.c:1627 [inline] slabs_destroy+0x89/0xc0 mm/slab.c:1647 cache_flusharray mm/slab.c:3418 [inline] ___cache_free+0x4c6/0x610 mm/slab.c:3480 qlink_free mm/kasan/quarantine.c:146 [inline] qlist_free_all+0x4e/0x110 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x92/0xa0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook mm/slab.h:519 [inline] slab_alloc mm/slab.c:3323 [inline] kmem_cache_alloc+0x25f/0x540 mm/slab.c:3507 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags include/linux/audit.h:319 [inline] getname fs/namei.c:217 [inline] __do_sys_mkdir fs/namei.c:3931 [inline] __se_sys_mkdir fs/namei.c:3929 [inline] __x64_sys_mkdir+0xda/0x140 fs/namei.c:3929 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f5a05c9f687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc41581478 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffc415844e0 RCX: 00007f5a05c9f687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055caad2f18c0 RBP: 00007ffc415814b0 R08: 000055caab8d23e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000055caad2f18c0 R15: 00007ffc41581af0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 85 c0 test %rax,%rax 3: 0f 84 8c 03 00 00 je 0x395 9: 4c 89 f2 mov %r14,%rdx c: 48 c1 ea 16 shr $0x16,%rdx 10: 48 8d 2c d0 lea (%rax,%rdx,8),%rbp 14: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1b: fc ff df 1e: 48 89 ea mov %rbp,%rdx 21: 48 c1 ea 03 shr $0x3,%rdx 25: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 29: 0f 85 c3 04 00 00 jne 0x4f2 <-- trapping instruction 2f: 48 8b 45 00 mov 0x0(%rbp),%rax 33: 48 85 c0 test %rax,%rax 36: 0f 84 59 03 00 00 je 0x395 3c: 83 e3 7f and $0x7f,%ebx