watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:5321] Modules linked in: irq event stamp: 4342171 hardirqs last enabled at (4342170): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4342171): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (4292128): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4292131): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 5321 Comm: syz-executor.1 Not tainted 5.10.237 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:193 Code: ff ff b9 ff ff ff ff b8 08 00 00 00 4d 8b 17 49 8b 16 48 0f bd c8 48 63 c9 e9 5e ff ff ff 4c 01 d2 49 89 17 e9 cd fd ff ff 90 <48> 8b 34 24 65 48 8b 14 25 80 6f 02 00 65 8b 05 4c b2 c1 7e a9 00 RSP: 0018:ffff88806cf09ba8 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff888047761d98 RCX: ffffffff83c38052 RDX: 0000000000000001 RSI: ffff8880153ab480 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8686c6a7 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888047678d00 R13: 0000000000000001 R14: 1ffff11008eec40b R15: dffffc0000000000 FS: 00007f4a1b3b0700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4a1b34d718 CR3: 0000000047d1e000 CR4: 0000000000350ee0 Call Trace: ieee80211_get_buffered_bc+0x5c5/0x8a0 net/mac80211/tx.c:5296 mac80211_hwsim_beacon_tx+0x4dd/0x940 drivers/net/wireless/mac80211_hwsim.c:1773 __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:1588 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1652 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1669 __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:crc32_body+0xad/0x600 lib/crc32.c:106 Code: ff 49 8d 7f 04 48 89 f8 48 c1 e8 03 42 0f b6 0c 20 48 89 f8 83 e0 07 83 c0 03 38 c8 7c 08 84 c9 0f 85 1e 05 00 00 41 8b 47 04 <31> d8 0f b6 c8 49 8d 9c 8d 00 1c 00 00 48 89 d9 48 c1 e9 03 42 0f RSP: 0018:ffff888048e9f1d8 EFLAGS: 00000246 RAX: 0000000000008000 RBX: 000000002c9eaebf RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff81f53474 RDI: ffff888045c0f100 RBP: ffff888045c0f100 R08: 0000000000000000 R09: ffff88801db62c87 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: ffffffff845bec00 R14: 0000000000000000 R15: ffff888045c0f0fc chksum_update+0x4c/0xb0 crypto/crc32c_generic.c:88 crypto_shash_update+0xca/0x120 crypto/shash.c:131 ext4_chksum fs/ext4/ext4.h:2302 [inline] ext4_inode_csum+0x189/0x8f0 fs/ext4/inode.c:60 ext4_inode_csum_set fs/ext4/inode.c:114 [inline] ext4_inode_csum_set+0x169/0x360 fs/ext4/inode.c:104 ext4_do_update_inode fs/ext4/inode.c:5281 [inline] ext4_mark_iloc_dirty+0x18dc/0x3630 fs/ext4/inode.c:5873 __ext4_mark_inode_dirty+0x20a/0x770 fs/ext4/inode.c:6075 __ext4_ext_dirty+0x1ce/0x240 fs/ext4/extents.c:182 ext4_ext_remove_space+0x2cbf/0x3d90 fs/ext4/extents.c:3036 ext4_ext_truncate+0x1ea/0x250 fs/ext4/extents.c:4465 ext4_truncate+0xc38/0x1160 fs/ext4/inode.c:4336 ext4_setattr+0x1659/0x20f0 fs/ext4/inode.c:5650 notify_change+0xc28/0x1160 fs/attr.c:410 do_truncate+0x134/0x1f0 fs/open.c:64 handle_truncate fs/namei.c:2970 [inline] do_open fs/namei.c:3311 [inline] path_openat+0x1dcd/0x2770 fs/namei.c:3425 do_filp_open+0x190/0x3e0 fs/namei.c:3452 do_sys_openat2+0x171/0x4d0 fs/open.c:1227 do_sys_open fs/open.c:1243 [inline] __do_sys_creat fs/open.c:1319 [inline] __se_sys_creat fs/open.c:1313 [inline] __x64_sys_creat+0xc9/0x120 fs/open.c:1313 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f4a1de5bb19 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:00007f4a1b3b0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f4a1df6f020 RCX: 00007f4a1de5bb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200001c0 RBP: 00007f4a1deb5f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd52c22b0f R14: 00007f4a1b3b0300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:711 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: b9 ff ff ff ff mov $0xffffffff,%ecx 5: b8 08 00 00 00 mov $0x8,%eax a: 4d 8b 17 mov (%r15),%r10 d: 49 8b 16 mov (%r14),%rdx 10: 48 0f bd c8 bsr %rax,%rcx 14: 48 63 c9 movslq %ecx,%rcx 17: e9 5e ff ff ff jmpq 0xffffff7a 1c: 4c 01 d2 add %r10,%rdx 1f: 49 89 17 mov %rdx,(%r15) 22: e9 cd fd ff ff jmpq 0xfffffdf4 27: 90 nop * 28: 48 8b 34 24 mov (%rsp),%rsi <-- trapping instruction 2c: 65 48 8b 14 25 80 6f mov %gs:0x26f80,%rdx 33: 02 00 35: 65 8b 05 4c b2 c1 7e mov %gs:0x7ec1b24c(%rip),%eax # 0x7ec1b288 3c: a9 .byte 0xa9