watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.2:7226] Modules linked in: irq event stamp: 5177767 hardirqs last enabled at (5177766): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5177767): [] sysvec_apic_timer_interrupt+0xf/0xc0 softirqs last enabled at (5150244): [] __irq_exit_rcu+0x11b/0x180 softirqs last disabled at (5150247): [] __irq_exit_rcu+0x11b/0x180 CPU: 0 PID: 7226 Comm: syz-executor.2 Not tainted 6.1.0-rc8-next-20221206 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x123/0x2130 Code: 00 00 41 f6 84 24 88 00 00 00 03 0f 85 b7 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8d 66 41 4c 89 e2 48 c1 ea 03 0f b6 04 02 <4c> 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 dd 07 00 00 48 89 e9 41 RSP: 0018:ffff88806ce097c8 EFLAGS: 00000216 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 1ffffffff0f376f8 RDX: 1ffff1100d9c1311 RSI: ffffffff82fda686 RDI: 0000000000000001 RBP: ffff88806ce098a0 R08: ffffffff862eca7c R09: ffffffff862eca80 R10: ffffed100d9c1316 R11: ffff88806ce09888 R12: ffff88806ce09889 R13: ffff88806ce098a8 R14: ffff88806ce09848 R15: ffff888008441c80 FS: 00007f2a2a314700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe30028c718 CR3: 0000000015d6c000 CR4: 0000000000350ef0 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0xa40 __kmem_cache_free+0x95/0x410 skb_release_data+0x6d8/0x810 consume_skb+0xcb/0x170 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x566/0xab0 __iterate_interfaces+0x2d3/0x560 ieee80211_iterate_active_interfaces_atomic+0x74/0x180 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x54b/0xba0 hrtimer_run_softirq+0x176/0x350 __do_softirq+0x1c7/0x8f9 __irq_exit_rcu+0x11b/0x180 irq_exit_rcu+0x9/0x30 sysvec_apic_timer_interrupt+0x92/0xc0 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:blk_cgroup_bio_start+0x410/0x640 Code: 02 00 00 48 8b 5d 38 31 ff 49 89 dc 41 83 e4 03 4c 89 e6 e8 f2 27 42 ff 4d 85 e4 0f 85 63 01 00 00 e8 84 2b 42 ff 65 48 ff 03 7b 2b 42 ff e8 86 9a 2c ff 31 ff 89 c3 89 c6 e8 3b 27 42 ff 84 RSP: 0018:ffff8880211c7870 EFLAGS: 00000256 RAX: 0000000000009d53 RBX: 0000607f92e21c10 RCX: ffffc90002e06000 RDX: 0000000000040000 RSI: ffffffff820728fc RDI: 0000000000000007 RBP: ffff88803e3b7000 R08: 0000000000000007 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888045c66000 R14: 0000000000000000 R15: 0000000000000000 submit_bio_noacct+0x46f/0x13f0 submit_bio+0x8f/0x1c0 write_dirty_buffer+0xc8/0x170 __flush_batch+0x11b/0x2b0 jbd2_log_do_checkpoint+0xa8f/0xf10 jbd2_journal_flush+0x1a6/0xc10 __ext4_ioctl+0x9c5/0x4500 __x64_sys_ioctl+0x19e/0x210 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f2a2cd9eb19 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:00007f2a2a314188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2a2ceb1f60 RCX: 00007f2a2cd9eb19 RDX: 0000000020000340 RSI: 000000004004662b RDI: 0000000000000005 RBP: 00007f2a2cdf8f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc9c8290cf R14: 00007f2a2a314300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci3: command 0x0406 tx timeout Bluetooth: hci7: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Process accounting resumed Process accounting resumed loop7: detected capacity change from 0 to 40 loop4: detected capacity change from 0 to 40 FAT-fs (loop3): Unrecognized mount option "euid>00000000000000000000" or missing value bio_check_eod: 1 callbacks suppressed syz-executor.7: attempt to access beyond end of device loop7: rw=0, sector=40, nr_sectors = 4 limit=40 syz-executor.7: attempt to access beyond end of device loop7: rw=0, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, async page read syz-executor.7: attempt to access beyond end of device loop7: rw=0, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, async page read syz-executor.7: attempt to access beyond end of device loop7: rw=0, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop7, logical block 10, async page read FAT-fs (loop0): Unrecognized mount option "euid>00000000000000000000" or missing value syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write audit: type=1400 audit(1670402578.898:12): avc: denied { read } for pid=7267 comm="syz-executor.5" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop7: detected capacity change from 0 to 40 syz-executor.2 uses obsolete (PF_INET,SOCK_PACKET) syz-executor.7: attempt to access beyond end of device loop7: rw=0, sector=40, nr_sectors = 4 limit=40 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write syz-executor.3 (7257) used greatest stack depth: 23000 bytes left loop7: detected capacity change from 0 to 40 loop4: detected capacity change from 0 to 40 syz-executor.7: attempt to access beyond end of device loop7: rw=0, sector=40, nr_sectors = 4 limit=40 syz-executor.4: attempt to access beyond end of device loop4: rw=2049, sector=40, nr_sectors = 4 limit=40 Buffer I/O error on dev loop4, logical block 10, lost async page write loop6: detected capacity change from 0 to 40 loop7: detected capacity change from 0 to 40 syz-executor.7: attempt to access beyond end of device loop7: rw=0, sector=40, nr_sectors = 4 limit=40 Process accounting resumed Buffer I/O error on dev loop6, logical block 10, lost async page write ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 41 f6 84 24 88 00 00 testb $0x3,0x88(%r12) 9: 00 03 b: 0f 85 b7 02 00 00 jne 0x2c8 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 4d 8d 66 41 lea 0x41(%r14),%r12 1f: 4c 89 e2 mov %r12,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax * 2a: 4c 89 e2 mov %r12,%rdx <-- trapping instruction 2d: 83 e2 07 and $0x7,%edx 30: 38 d0 cmp %dl,%al 32: 7f 08 jg 0x3c 34: 84 c0 test %al,%al 36: 0f 85 dd 07 00 00 jne 0x819 3c: 48 89 e9 mov %rbp,%rcx 3f: 41 rex.B