EXT4-fs (loop7): VFS: Can't find ext4 filesystem watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.3:6075] Modules linked in: irq event stamp: 14468939 hardirqs last enabled at (14468938): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (14468939): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (14465518): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (14465521): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 6075 Comm: syz-executor.3 Not tainted 5.10.233 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__orc_find+0x86/0xf0 arch/x86/kernel/unwind_orc.c:52 Code: d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 50 48 63 03 48 01 d8 <48> 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee 49 c1 fe 02 4b RSP: 0018:ffff88806ce09820 EFLAGS: 00000283 RAX: ffffffff83c3788f RBX: ffffffff85925fb8 RCX: ffffffff83c37850 RDX: 0000000000000000 RSI: ffffffff85d17176 RDI: ffffffff85925fa8 RBP: ffffffff85925fa8 R08: ffffffff85d17176 R09: ffffffff85d171ac R10: 0000000000032042 R11: 1ffff1100d9c1315 R12: ffffffff85925fc8 R13: ffffffff85925fa8 R14: ffffffff85925fa8 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff64982fe0 CR3: 0000000004e26000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: orc_find arch/x86/kernel/unwind_orc.c:178 [inline] unwind_next_frame+0x2b3/0x1a90 arch/x86/kernel/unwind_orc.c:448 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 __save_stack_trace mm/kmemleak.c:563 [inline] create_object.isra.0+0x372/0xa20 mm/kmemleak.c:618 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] __kmalloc_node_track_caller+0x1a6/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:144 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:212 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:448 netdev_alloc_skb include/linux/skbuff.h:2855 [inline] dev_alloc_skb include/linux/skbuff.h:2868 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1586 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1650 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1667 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:__free_pages_ok+0x31/0xd00 mm/page_alloc.c:1519 Code: fc ff df 41 57 41 56 41 55 41 54 41 89 f4 55 48 89 fd 53 48 83 ec 30 89 54 24 28 48 c7 c2 40 d6 c8 84 48 c1 ea 03 80 3c 02 00 <0f> 85 a0 0a 00 00 48 8b 05 e2 ae 62 03 4c 8d 6d 08 4c 89 ea 48 89 RSP: 0018:ffff88801f2a7318 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81667004 RDX: 1ffffffff0991ac8 RSI: 0000000000000003 RDI: ffffea00011c8600 RBP: ffffea00011c8600 R08: 0000000000000001 R09: ffffea00011c8637 R10: fffff940002390c6 R11: 0000000000000001 R12: 0000000000000003 R13: 0000000080000000 R14: ffffffff80000000 R15: ffff88800ee61960 qlink_free mm/kasan/quarantine.c:151 [inline] qlist_free_all+0x59/0xe0 mm/kasan/quarantine.c:170 quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:267 __kasan_kmalloc.constprop.0+0xa2/0xd0 mm/kasan/common.c:442 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x13b/0x310 mm/slub.c:2909 kmem_cache_zalloc include/linux/slab.h:654 [inline] jbd2_alloc_handle include/linux/jbd2.h:1554 [inline] new_handle fs/jbd2/transaction.c:464 [inline] jbd2__journal_start+0x190/0x7e0 fs/jbd2/transaction.c:491 __ext4_journal_start_sb+0x214/0x390 fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:328 [inline] ext4_da_write_begin+0x51f/0xd40 fs/ext4/inode.c:3055 generic_perform_write+0x20a/0x4f0 mm/filemap.c:3336 ext4_buffered_write_iter+0x232/0x4a0 fs/ext4/file.c:269 ext4_file_write_iter+0x3ab/0x1530 fs/ext4/file.c:662 __kernel_write+0x593/0xb40 fs/read_write.c:550 do_acct_process+0xd46/0x1360 kernel/acct.c:524 slow_acct_process kernel/acct.c:583 [inline] acct_process+0x41f/0x580 kernel/acct.c:607 do_exit+0x182f/0x2600 kernel/exit.c:850 do_group_exit+0x125/0x310 kernel/exit.c:982 get_signal+0x4bc/0x2350 kernel/signal.c:2762 arch_do_signal_or_restart+0x2b7/0x1990 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x10f/0x190 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x38/0x1d0 kernel/entry/common.c:274 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f057575eb19 Code: Unable to access opcode bytes at RIP 0x7f057575eaef. RSP: 002b:00007f0572cb3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: 0000000000000001 RBX: 00007f0575872020 RCX: 00007f057575eb19 RDX: 0000000000000001 RSI: 0000000020002040 RDI: 0000000000000008 RBP: 00007f05757b8f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffee60fcef R14: 00007f0572cb3300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 ---------------- Code disassembly (best guess): 0: d1 f8 sar %eax 2: 48 8d 5c 85 00 lea 0x0(%rbp,%rax,4),%rbx 7: 48 89 d8 mov %rbx,%rax a: 48 c1 e8 03 shr $0x3,%rax e: 42 0f b6 14 38 movzbl (%rax,%r15,1),%edx 13: 48 89 d8 mov %rbx,%rax 16: 83 e0 07 and $0x7,%eax 19: 83 c0 03 add $0x3,%eax 1c: 38 d0 cmp %dl,%al 1e: 7c 04 jl 0x24 20: 84 d2 test %dl,%dl 22: 75 50 jne 0x74 24: 48 63 03 movslq (%rbx),%rax 27: 48 01 d8 add %rbx,%rax * 2a: 48 39 c1 cmp %rax,%rcx <-- trapping instruction 2d: 73 b0 jae 0xffffffdf 2f: 4c 8d 63 fc lea -0x4(%rbx),%r12 33: 49 39 ec cmp %rbp,%r12 36: 73 b3 jae 0xffffffeb 38: 4d 29 ee sub %r13,%r14 3b: 49 c1 fe 02 sar $0x2,%r14 3f: 4b rex.WXB