./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2498504887 <...> Warning: Permanently added '10.128.1.46' (ED25519) to the list of known hosts. execve("./syz-executor2498504887", ["./syz-executor2498504887"], 0x7ffc03833ba0 /* 10 vars */) = 0 brk(NULL) = 0x55555700b000 brk(0x55555700be00) = 0x55555700be00 arch_prctl(ARCH_SET_FS, 0x55555700b480) = 0 set_tid_address(0x55555700b750) = 5026 set_robust_list(0x55555700b760, 24) = 0 rseq(0x55555700bda0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2498504887", 4096) = 28 getrandom("\xc8\x23\xd0\x66\x33\x09\xf5\x19", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555700be00 brk(0x55555702ce00) = 0x55555702ce00 brk(0x55555702d000) = 0x55555702d000 mprotect(0x7f6f23966000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7f6f238c2c60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f6f238c9ef0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f6f238c2c60, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f6f238c9ef0}, NULL, 8) = 0 io_uring_setup(18137, {flags=0, sq_thread_cpu=0, sq_thread_idle=0, sq_entries=32768, cq_entries=65536, features=IORING_FEAT_SINGLE_MMAP|IORING_FEAT_NODROP|IORING_FEAT_SUBMIT_STABLE|IORING_FEAT_RW_CUR_POS|IORING_FEAT_CUR_PERSONALITY|IORING_FEAT_FAST_POLL|IORING_FEAT_POLL_32BITS|IORING_FEAT_SQPOLL_NONFIXED|IORING_FEAT_EXT_ARG|IORING_FEAT_NATIVE_WORKERS|IORING_FEAT_RSRC_TAGS|IORING_FEAT_CQE_SKIP|IORING_FEAT_LINKED_FILE|0x2000, sq_off={head=0, tail=4, ring_mask=16, ring_entries=24, flags=36, dropped=32, array=1048640}, cq_off={head=8, tail=12, ring_mask=20, ring_entries=28, overflow=44, cqes=64, flags=40}}) = 3 mmap(NULL, 1179712, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 3, 0) = 0x7f6f23798000 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- io_uring_setup(9465, {flags=IORING_SETUP_COOP_TASKRUN|0x10000, sq_thread_cpu=0, sq_thread_idle=0, sq_entries=16384, cq_entries=32768, features=IORING_FEAT_SINGLE_MMAP|IORING_FEAT_NODROP|IORING_FEAT_SUBMIT_STABLE|IORING_FEAT_RW_CUR_POS|IORING_FEAT_CUR_PERSONALITY|IORING_FEAT_FAST_POLL|IORING_FEAT_POLL_32BITS|IORING_FEAT_SQPOLL_NONFIXED|IORING_FEAT_EXT_ARG|IORING_FEAT_NATIVE_WORKERS|IORING_FEAT_RSRC_TAGS|IORING_FEAT_CQE_SKIP|IORING_FEAT_LINKED_FILE|0x2000, sq_off={head=0, tail=4, ring_mask=16, ring_entries=24, flags=36, dropped=32, array=0}, cq_off={head=8, tail=12, ring_mask=20, ring_entries=28, overflow=44, cqes=64, flags=40}}) = 4 mmap(NULL, 524352, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 4, 0) = 0x7f6f23717000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_POPULATE, 4, 0x10000000) = 0x7f6f23617000 openat(AT_FDCWD, "/proc/thread-self/fdinfo/4", O_RDWR) = 5 syzkaller login: [ 51.611514][ T5026] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 51.623435][ T5026] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 51.631831][ T5026] CPU: 0 PID: 5026 Comm: syz-executor249 Not tainted 6.5.0-syzkaller-09276-g99d99825fc07 #0 [ 51.641964][ T5026] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 [ 51.652098][ T5026] RIP: 0010:io_uring_show_fdinfo+0x391/0x1790 [ 51.658160][ T5026] Code: 00 00 00 42 80 3c 28 00 74 0f 48 8b 7c 24 30 e8 d5 9d 22 f7 48 8b 4c 24 30 44 21 f3 48 c1 e3 02 48 03 19 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 64 02 00 00 8b 1b 89 df 44 89 f6 e8 c7 c9 [ 51.677769][ T5026] RSP: 0018:ffffc900038ffc20 EFLAGS: 00010246 [ 51.683832][ T5026] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8880299e60d0 [ 51.691791][ T5026] RDX: ffff8880262f9dc0 RSI: 0000000000000001 RDI: 0000000000000000 [ 51.699745][ T5026] RBP: ffffc900038ffd98 R08: ffffffff8ac4995f R09: 1ffff11004f01013 [ 51.707712][ T5026] R10: dffffc0000000000 R11: ffffed1004f01014 R12: ffff888021153de0 [ 51.715679][ T5026] R13: dffffc0000000000 R14: 0000000000003fff R15: 0000000000000001 [ 51.723723][ T5026] FS: 000055555700b480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 51.732636][ T5026] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 51.739299][ T5026] CR2: 00007f6f2394f653 CR3: 0000000029588000 CR4: 00000000003506f0 [ 51.747258][ T5026] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 51.755213][ T5026] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 51.763181][ T5026] Call Trace: [ 51.766447][ T5026] [ 51.769369][ T5026] ? __die_body+0x8b/0xe0 [ 51.773733][ T5026] ? die_addr+0xc9/0x100 [ 51.777985][ T5026] ? exc_general_protection+0x3c2/0x5b0 [ 51.783527][ T5026] ? asm_exc_general_protection+0x26/0x30 [ 51.789245][ T5026] ? io_uring_show_fdinfo+0x2ff/0x1790 [ 51.794782][ T5026] ? io_uring_show_fdinfo+0x391/0x1790 [ 51.800233][ T5026] ? io_sqpoll_wq_cpu_affinity+0xc0/0xc0 [ 51.805870][ T5026] ? do_raw_spin_unlock+0x13b/0x8b0 [ 51.811062][ T5026] ? show_fd_locks+0x18e/0x3d0 [ 51.815821][ T5026] ? io_sqpoll_wq_cpu_affinity+0xc0/0xc0 [ 51.821439][ T5026] seq_show+0x57d/0x6a0 [ 51.825584][ T5026] traverse+0x1d5/0x530 [ 51.829827][ T5026] seq_lseek+0x129/0x240 [ 51.834229][ T5026] __x64_sys_lseek+0x14f/0x1d0 [ 51.839100][ T5026] do_syscall_64+0x41/0xc0 [ 51.843519][ T5026] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 51.849401][ T5026] RIP: 0033:0x7f6f238f2fe9 [ 51.853819][ T5026] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 [ 51.873672][ T5026] RSP: 002b:00007ffc7fc29dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000008 [ 51.882089][ T5026] RAX: ffffffffffffffda RBX: 00007ffc7fc29de0 RCX: 00007f6f238f2fe9 [ 51.890306][ T5026] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 [ 51.898262][ T5026] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 51.906218][ T5026] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 51.914259][ T5026] R13: 00007ffc7fc2a048 R14: 0000000000000001 R15: 0000000000000001 [ 51.922223][ T5026] [ 51.925228][ T5026] Modules linked in: [ 51.929990][ T5026] ---[ end trace 0000000000000000 ]--- [ 51.935462][ T5026] RIP: 0010:io_uring_show_fdinfo+0x391/0x1790 [ 51.941683][ T5026] Code: 00 00 00 42 80 3c 28 00 74 0f 48 8b 7c 24 30 e8 d5 9d 22 f7 48 8b 4c 24 30 44 21 f3 48 c1 e3 02 48 03 19 48 89 d8 48 c1 e8 03 <42> 8a 04 28 84 c0 0f 85 64 02 00 00 8b 1b 89 df 44 89 f6 e8 c7 c9 [ 51.961967][ T5026] RSP: 0018:ffffc900038ffc20 EFLAGS: 00010246 [ 51.968287][ T5026] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8880299e60d0 [ 51.976303][ T5026] RDX: ffff8880262f9dc0 RSI: 0000000000000001 RDI: 0000000000000000 [ 51.984332][ T5026] RBP: ffffc900038ffd98 R08: ffffffff8ac4995f R09: 1ffff11004f01013 [ 51.992438][ T5026] R10: dffffc0000000000 R11: ffffed1004f01014 R12: ffff888021153de0 [ 52.000447][ T5026] R13: dffffc0000000000 R14: 0000000000003fff R15: 0000000000000001 [ 52.008681][ T5026] FS: 000055555700b480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 52.017719][ T5026] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.024444][ T5026] CR2: 00007f6f2394f653 CR3: 0000000029588000 CR4: 00000000003506f0 [ 52.032448][ T5026] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.040683][ T5026] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.048669][ T5026] Kernel panic - not syncing: Fatal exception [ 52.055290][ T5026] Kernel Offset: disabled [ 52.059608][ T5026] Rebooting in 86400 seconds..