audit: type=1804 audit(1637322249.178:257): pid=19376 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir639637878/syzkaller.fedhhb/2235/bus" dev="sda1" ino=14002 res=1 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:19390] Modules linked in: irq event stamp: 3418267 hardirqs last enabled at (3418266): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (3418266): [] _raw_spin_unlock_irq+0x24/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (3418267): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (4570): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (4621): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (4621): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 19390 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192 Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d RSP: 0018:ffff8880ba007de0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff11004142d7d RDX: dffffc0000000000 RSI: ffff888020a16bc8 RDI: ffff888020a16bc4 RBP: ffff8880ba022b40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff869a4ab0 R13: ffff8880ba022b40 R14: ffff8880ba007e78 R15: 0000000000000000 FS: 00007f53f1bb0700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc060a3c00 CR3: 000000009cff3000 CR4: 00000000003426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: expire_timers+0x238/0x4e0 kernel/time/timer.c:1374 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:is_bpf_text_address+0x2/0x1b0 kernel/bpf/core.c:543 Code: e9 1b ff ff ff 48 89 df e8 ab 54 2b 00 eb c1 48 89 ef e8 a1 54 2b 00 eb 82 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 54 <55> 48 89 fd 53 e8 c4 74 f5 ff e8 2f fb e3 ff e8 ba 74 f5 ff 45 31 RSP: 0018:ffff88801f0477a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 000000001f047800 RBX: 00007f53f463aae9 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000004 RDI: 00007f53f463aae9 RBP: 00007f53f463aae9 R08: 0000000000000000 R09: ffffed101740455a R10: ffff8880ba022ad3 R11: 0000000000074071 R12: ffff88801f047898 R13: 0000000000000000 R14: ffff88813bff04c0 R15: 0000000000000060 kernel_text_address kernel/extable.c:152 [inline] kernel_text_address+0xbd/0xf0 kernel/extable.c:122 __kernel_text_address+0x9/0x30 kernel/extable.c:107 unwind_get_return_address arch/x86/kernel/unwind_orc.c:297 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:292 __save_stack_trace+0xaf/0x190 arch/x86/kernel/stacktrace.c:45 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc_trace+0x11a/0x380 mm/slab.c:3623 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] aa_alloc_file_ctx security/apparmor/include/file.h:60 [inline] apparmor_file_alloc_security+0x394/0xad0 security/apparmor/lsm.c:438 security_file_alloc+0x40/0x90 security/security.c:880 __alloc_file+0xd8/0x340 fs/file_table.c:105 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 alloc_file+0x5e/0x4d0 fs/file_table.c:192 alloc_file_pseudo+0x165/0x250 fs/file_table.c:231 anon_inode_getfile fs/anon_inodes.c:87 [inline] anon_inode_getfile+0xc8/0x1f0 fs/anon_inodes.c:70 __do_sys_perf_event_open kernel/events/core.c:10775 [inline] __se_sys_perf_event_open+0xaa0/0x2720 kernel/events/core.c:10549 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f53f463aae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f53f1bb0188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f53f474df60 RCX: 00007f53f463aae9 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 000000002025c000 RBP: 00007f53f4694f6d R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe32caea8f R14: 00007f53f1bb0300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13629 Comm: kworker/u4:10 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x1db/0x420 kernel/smp.c:302 Code: 00 e8 09 04 0a 00 48 8b 4c 24 08 48 8b 54 24 10 48 8d 74 24 40 8b 7c 24 1c e8 a1 f9 ff ff 41 89 c5 eb 07 e8 e7 03 0a 00 f3 90 <44> 8b 64 24 58 31 ff 41 83 e4 01 44 89 e6 e8 42 05 0a 00 45 85 e4 RSP: 0018:ffff88804ff76ce0 EFLAGS: 00000293 RAX: ffff8880b07421c0 RBX: 1ffff11009feeda0 RCX: ffffffff8158819e RDX: 0000000000000000 RSI: ffffffff81588189 RDI: 0000000000000005 RBP: ffff88804ff76da8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000007e38902 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc060a6717 CR3: 0000000093536000 CR4: 00000000003426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x743/0x8d0 kernel/smp.c:434 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x179/0x320 arch/x86/mm/tlb.c:728 flush_tlb_page arch/x86/include/asm/tlbflush.h:576 [inline] ptep_clear_flush+0x123/0x160 mm/pgtable-generic.c:87 page_mkclean_one+0x425/0x860 mm/rmap.c:912 rmap_walk_file+0x539/0xb10 mm/rmap.c:1897 rmap_walk+0x105/0x190 mm/rmap.c:1915 page_mkclean+0x20f/0x2b0 mm/rmap.c:981 clear_page_dirty_for_io+0x305/0xee0 mm/page-writeback.c:2687 mpage_submit_page+0x80/0x250 fs/ext4/inode.c:2215 mpage_process_page_bufs+0x534/0x630 fs/ext4/inode.c:2345 mpage_prepare_extent_to_map+0x9a2/0xf10 fs/ext4/inode.c:2707 ext4_writepages+0x111d/0x37f0 fs/ext4/inode.c:2835 do_writepages+0xe5/0x290 mm/page-writeback.c:2344 __writeback_single_inode+0x10c/0x11d0 fs/fs-writeback.c:1385 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1716 wb_writeback+0x841/0xcc0 fs/fs-writeback.c:1822 wb_check_old_data_flush fs/fs-writeback.c:1924 [inline] wb_do_writeback fs/fs-writeback.c:1977 [inline] wb_workfn+0x8ba/0x1250 fs/fs-writeback.c:2006 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 ---------------- Code disassembly (best guess), 5 bytes skipped: 0: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 7: fc ff df a: 48 c1 e8 03 shr $0x3,%rax e: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 12: 75 31 jne 0x45 14: 48 83 3d 01 31 d8 01 cmpq $0x0,0x1d83101(%rip) # 0x1d8311d 1b: 00 1c: 74 25 je 0x43 1e: fb sti 1f: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) * 25: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction 2a: e8 26 1b 28 f9 callq 0xf9281b55 2f: 65 8b 05 9f 8d e8 77 mov %gs:0x77e88d9f(%rip),%eax # 0x77e88dd5 36: 85 c0 test %eax,%eax 38: 74 02 je 0x3c 3a: 5d pop %rbp