[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. syzkaller login: [ 35.149746] IPVS: ftp: loaded support on port[0] = 21 [ 35.220270] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 35.228374] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 35.244470] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 35.254400] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 35.261678] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 35.274016] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 35.281374] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 35.288538] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program [ 35.350268] UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/09/12 12:00 (1000) [ 35.379508] ------------[ cut here ]------------ [ 35.384300] VFS: brelse: Trying to free free buffer [ 35.389440] WARNING: CPU: 0 PID: 0 at fs/buffer.c:1144 __brelse+0x67/0xa0 [ 35.396350] Kernel panic - not syncing: panic_on_warn set ... [ 35.396350] [ 35.403700] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.211-syzkaller #0 [ 35.410878] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 35.420256] Call Trace: [ 35.422828] [ 35.424970] dump_stack+0x1fc/0x2ef [ 35.428591] panic+0x26a/0x50e [ 35.431769] ? __warn_printk+0xf3/0xf3 [ 35.435656] ? __brelse+0x67/0xa0 [ 35.439103] ? __probe_kernel_read+0x130/0x1b0 [ 35.443683] ? __warn.cold+0x5/0x5a [ 35.447316] ? __warn+0xe4/0x200 [ 35.450696] ? __brelse+0x67/0xa0 [ 35.454148] __warn.cold+0x20/0x5a [ 35.457704] ? __brelse+0x67/0xa0 [ 35.461153] report_bug+0x262/0x2b0 [ 35.464775] do_error_trap+0x1d7/0x310 [ 35.468763] ? math_error+0x310/0x310 [ 35.472583] ? irq_work_claim+0xa6/0xc0 [ 35.476556] ? irq_work_queue+0x29/0x80 [ 35.480532] ? error_entry+0x72/0xd0 [ 35.484249] ? trace_hardirqs_off_caller+0x2c/0x210 [ 35.489266] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 35.494099] invalid_op+0x14/0x20 [ 35.497540] RIP: 0010:__brelse+0x67/0xa0 [ 35.501585] Code: 7c 04 84 d2 75 4e 44 8b 63 60 31 ff 44 89 e6 e8 bf 16 b2 ff 45 85 e4 75 1c e8 45 15 b2 ff 48 c7 c7 e0 1c 75 88 e8 1e 4d 42 06 <0f> 0b 5b 5d 41 5c e9 2e 15 b2 ff e8 29 15 b2 ff be 04 00 00 00 48 [ 35.520769] RSP: 0018:ffff8880ba007f40 EFLAGS: 00010082 [ 35.526126] RAX: 0000000000000000 RBX: ffff88808b43a348 RCX: 0000000000000000 [ 35.533410] RDX: 0000000000010000 RSI: ffffffff814dff01 RDI: ffffed1017400fda [ 35.540663] RBP: ffff88808b43a3a8 R08: 0000000000000001 R09: 0000000000000000 [ 35.547919] R10: 0000000000000005 R11: ffffffff8c66501b R12: 0000000000000000 [ 35.555260] R13: dffffc0000000000 R14: ffff8880ba0287e0 R15: 0000000000000000 [ 35.562530] ? vprintk_func+0x81/0x180 [ 35.566418] invalidate_bh_lru+0x90/0x140 [ 35.570558] flush_smp_call_function_queue+0x144/0x4d0 [ 35.575826] ? __find_get_block+0xde0/0xde0 [ 35.580136] smp_call_function_single_interrupt+0x98/0x440 [ 35.585750] call_function_single_interrupt+0xf/0x20 [ 35.590832] [ 35.593056] RIP: 0010:native_safe_halt+0xe/0x10 [ 35.597714] Code: 48 89 df e8 f4 20 7f f9 e9 2e ff ff ff 48 89 df e8 e7 20 7f f9 eb 82 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 14 43 4e 00 fb f4 90 e9 07 00 00 00 0f 00 2d 04 43 4e 00 f4 c3 90 90 41 56 41 55 [ 35.616600] RSP: 0018:ffffffff89e07d40 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff04 [ 35.624295] RAX: 1ffffffff13e3054 RBX: dffffc0000000000 RCX: 0000000000000000 [ 35.631562] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff89e78904 [ 35.638824] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 35.646093] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89f18290 [ 35.653355] R13: 1ffffffff13c0fb2 R14: 0000000000000000 R15: 0000000000000000 [ 35.660641] default_idle+0x49/0x310 [ 35.664351] do_idle+0x2ec/0x4b0 [ 35.667709] ? arch_cpu_idle_exit+0x70/0x70 [ 35.672025] ? check_preemption_disabled+0x41/0x280 [ 35.677029] cpu_startup_entry+0xc5/0xe0 [ 35.681078] ? cpu_in_idle+0x20/0x20 [ 35.684781] ? preempt_count_add+0xaf/0x190 [ 35.689093] ? trace_event_define_fields_vector_free_moved+0xab/0xab [ 35.695575] start_kernel+0x8d6/0x911 [ 35.699383] ? mem_encrypt_init+0x5/0x5 [ 35.703372] ? load_ucode_bsp+0x239/0x279 [ 35.707522] secondary_startup_64+0xa4/0xb0 [ 35.712250] Kernel Offset: disabled [ 35.715964] Rebooting in 86400 seconds..