Warning: Permanently added '10.128.10.4' (ED25519) to the list of known hosts. [+] Starting reproduction for blktrace print_one_line NULL dereference... [+] Running with root privileges (euid=0). [+] Found tracing directory: /sys/kernel/tracing [+] memfd_create successful. [+] ftruncate successful. [+] open /dev/loop0 successful. [+] ioctl LOOP_SET_FD successful. [+] ioctl BLKTRACESETUP successful. [+] ioctl BLKTRACESTART successful. [+] write to /proc/sys/kernel/pid_max successful (8 bytes). [+] Truncated /sys/kernel/tracing/trace. [ 104.800016][ T6058] loop0: detected capacity change from 0 to 4096 [+] write to /sys/kernel/tracing/current_tracer successful (4 bytes). [+] write to /sys/kernel/tracing/tracing_on successful (2 bytes). [+] Attempting clone3 with target PID 14... [-] clone3 with target PID 14 failed: File exists [+] Child running with PID 65 ((pid & 0xfeff) = 65) [+] Child pwrite successful (4096 bytes). [+] Child pread successful (4096 bytes). [+] Child fsync successful. [+] Child direct I/O completed. [+] Child finished I/O, exiting. [+] Attempting clone3 with target PID 270... [+] clone3 succeeded (child=270, target=270). [+] clone3 succeeded (child=0, target=270). [+] Child running with PID 270 ((pid & 0xfeff) = 14) [+] Child pwrite successful (4096 bytes). [+] Child pread successful (4096 bytes). [+] Child fsync successful. [+] Child direct I/O completed. [+] Child finished I/O, exiting. [+] Child 270 reaped successfully (status=0x0). [+] open /sys/kernel/tracing/trace successful. [+] Reading /sys/kernel/tracing/trace to trigger print_one_line NULL dereference... [ 104.908300][ T6058] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 104.916149][ T6058] #PF: supervisor instruction fetch in kernel mode [ 104.922659][ T6058] #PF: error_code(0x0010) - not-present page [ 104.928738][ T6058] PGD 0 P4D 0 [ 104.932157][ T6058] Oops: Oops: 0010 [#1] SMP KASAN PTI [ 104.937568][ T6058] CPU: 1 UID: 0 PID: 6058 Comm: syz-executor155 Not tainted syzkaller #0 PREEMPT(full) [ 104.947297][ T6058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 [ 104.957363][ T6058] RIP: 0010:0x0 [ 104.960929][ T6058] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 104.968365][ T6058] RSP: 0018:ffffc900039cf9f8 EFLAGS: 00010206 [ 104.974506][ T6058] RAX: 1ffff1100f6dc81e RBX: 0000000000000000 RCX: ffff888027a8ddc0 [ 104.982467][ T6058] RDX: 0000000000000001 RSI: ffff88807b428004 RDI: ffff88807b6e20f0 [ 104.990430][ T6058] RBP: ffffffff8c334eb0 R08: ffff88807b6e215d R09: 1ffff1100f6dc42b [ 104.998420][ T6058] R10: dffffc0000000000 R11: 0000000000000000 R12: ffff88807b6e0000 [ 105.006386][ T6058] R13: ffffffff81d21760 R14: ffff88807b6e20f0 R15: ffff88807b6e40f0 [ 105.014349][ T6058] FS: 000055555b9db400(0000) GS:ffff8881234ff000(0000) knlGS:0000000000000000 [ 105.023359][ T6058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 105.029930][ T6058] CR2: ffffffffffffffd6 CR3: 000000005d394000 CR4: 00000000003526f0 [ 105.037890][ T6058] Call Trace: [ 105.041159][ T6058] [ 105.044078][ T6058] print_one_line+0x29d/0x300 [ 105.048770][ T6058] s_show+0x142/0x320 [ 105.052833][ T6058] seq_read_iter+0x8d5/0xca0 [ 105.057458][ T6058] seq_read+0x367/0x480 [ 105.061610][ T6058] ? __pfx_seq_read+0x10/0x10 [ 105.066283][ T6058] ? rw_verify_area+0x24a/0x4c0 [ 105.071220][ T6058] ? __pfx_seq_read+0x10/0x10 [ 105.075910][ T6058] vfs_read+0x213/0xa80 [ 105.080077][ T6058] ? __pfx_vfs_read+0x10/0x10 [ 105.084762][ T6058] ? do_sys_openat2+0x18d/0x200 [ 105.089634][ T6058] ? kmem_cache_free+0x184/0x660 [ 105.094655][ T6058] ? fdget+0x16b/0x250 [ 105.098724][ T6058] ksys_read+0x150/0x270 [ 105.102980][ T6058] ? __pfx_ksys_read+0x10/0x10 [ 105.107970][ T6058] do_syscall_64+0x166/0x520 [ 105.112574][ T6058] ? trace_irq_disable+0x3b/0x140 [ 105.117598][ T6058] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 105.123672][ T6058] ? clear_bhb_loop+0x70/0xc0 [ 105.128374][ T6058] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 105.134275][ T6058] RIP: 0033:0x7fc3268e9437 [ 105.138717][ T6058] Code: 48 89 fa 4c 89 df e8 98 1e 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff [ 105.158321][ T6058] RSP: 002b:00007ffe64d7f280 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 105.166912][ T6058] RAX: ffffffffffffffda RBX: 000055555b9db400 RCX: 00007fc3268e9437 [ 105.174900][ T6058] RDX: 0000000000001000 RSI: 00007ffe64d7f530 RDI: 0000000000000005 [ 105.182868][ T6058] RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000 [ 105.190826][ T6058] R10: 0000000000000000 R11: 0000000000000202 R12: 00007fc326926928 [ 105.198787][ T6058] R13: 0000000000000004 R14: 00007ffe64d7f430 R15: 00007ffe64d7f2fc [ 105.206766][ T6058] [ 105.209776][ T6058] Modules linked in: [ 105.213668][ T6058] CR2: 0000000000000000 [ 105.217834][ T6058] ---[ end trace 0000000000000000 ]--- [ 105.223278][ T6058] RIP: 0010:0x0 [ 105.223301][ T6058] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 105.223309][ T6058] RSP: 0018:ffffc900039cf9f8 EFLAGS: 00010206 [ 105.223323][ T6058] RAX: 1ffff1100f6dc81e RBX: 0000000000000000 RCX: ffff888027a8ddc0 [ 105.223333][ T6058] RDX: 0000000000000001 RSI: ffff88807b428004 RDI: ffff88807b6e20f0 [ 105.223343][ T6058] RBP: ffffffff8c334eb0 R08: ffff88807b6e215d R09: 1ffff1100f6dc42b [ 105.223354][ T6058] R10: dffffc0000000000 R11: 0000000000000000 R12: ffff88807b6e0000 [ 105.223365][ T6058] R13: ffffffff81d21760 R14: ffff88807b6e20f0 R15: ffff88807b6e40f0 [ 105.223376][ T6058] FS: 000055555b9db400(0000) GS:ffff8881234ff000(0000) knlGS:0000000000000000 [ 105.223389][ T6058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 105.223399][ T6058] CR2: ffffffffffffffd6 CR3: 000000005d394000 CR4: 00000000003526f0 [ 105.223415][ T6058] Kernel panic - not syncing: Fatal exception [ 105.309860][ T6058] Kernel Offset: disabled [ 105.314199][ T6058] Rebooting in 86400 seconds..