./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2438079688 <...> Warning: Permanently added '10.128.1.225' (ED25519) to the list of known hosts. execve("./syz-executor2438079688", ["./syz-executor2438079688"], 0x7ffd1ff5ce20 /* 10 vars */) = 0 brk(NULL) = 0x555573e9d000 brk(0x555573e9dd00) = 0x555573e9dd00 arch_prctl(ARCH_SET_FS, 0x555573e9d380) = 0 set_tid_address(0x555573e9d650) = 5219 set_robust_list(0x555573e9d660, 24) = 0 rseq(0x555573e9dca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2438079688", 4096) = 28 getrandom("\x2a\x06\xb2\x97\x31\x64\x53\xa7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555573e9dd00 brk(0x555573ebed00) = 0x555573ebed00 brk(0x555573ebf000) = 0x555573ebf000 mprotect(0x7fc785a0d000, 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 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5220 attached [pid 5220] set_robust_list(0x555573e9d660, 24) = 0 [pid 5220] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5220] setpgid(0, 0 [pid 5219] <... clone resumed>, child_tidptr=0x555573e9d650) = 5220 [pid 5220] <... setpgid resumed>) = 0 [pid 5220] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5220] write(3, "1000", 4) = 4 [pid 5220] close(3) = 0 [pid 5220] write(1, "executing program\n", 18executing program ) = 18 [pid 5220] memfd_create("syzkaller", 0) = 3 [pid 5220] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc77d400000 [pid 5220] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1048576) = 1048576 [pid 5220] munmap(0x7fc77d400000, 138412032) = 0 [pid 5220] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5220] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5220] close(3) = 0 [pid 5220] close(4) = 0 [pid 5220] mkdir("./file0", 0777) = 0 [ 78.161402][ T5220] loop0: detected capacity change from 0 to 2048 [pid 5220] mount("/dev/loop0", "./file0", "nilfs2", 0, "") = 0 [pid 5220] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5220] chdir("./file0") = 0 [pid 5220] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5220] openat(AT_FDCWD, "./file2", O_RDWR|O_CREAT|O_NOCTTY|O_DSYNC|O_LARGEFILE|O_NOATIME|FASYNC, 000) = 4 [ 78.202064][ T5222] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 78.252669][ T5220] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN PTI [ 78.265320][ T5220] KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] [ 78.273750][ T5220] CPU: 1 UID: 0 PID: 5220 Comm: syz-executor243 Not tainted 6.11.0-rc5-syzkaller-00057-g86987d84b968 #0 [ 78.284973][ T5220] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 [ 78.295115][ T5220] RIP: 0010:nilfs_btree_insert+0x6d3/0x1c10 [ 78.301041][ T5220] Code: 8d 9f 80 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 ab 89 8a fe 48 8b 1b 48 83 c3 28 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 8e 89 8a fe 4c 89 64 24 28 48 8b [ 78.320671][ T5220] RSP: 0018:ffffc9000352f4e0 EFLAGS: 00010206 [ 78.326734][ T5220] RAX: 0000000000000005 RBX: 0000000000000028 RCX: 1ffff1100f66a0ee [ 78.334718][ T5220] RDX: ffff88807d6f9e00 RSI: 0000000000000002 RDI: 0000000000000001 [ 78.342691][ T5220] RBP: ffffc9000352f670 R08: ffffffff836d1ea6 R09: 1ffff1100469939a [ 78.350681][ T5220] R10: dffffc0000000000 R11: ffffed100469939b R12: 0000000000000000 [ 78.358650][ T5220] R13: dffffc0000000000 R14: 0000000000000002 R15: ffff88807fbd9680 [ 78.366614][ T5220] FS: 0000555573e9d380(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 [ 78.375539][ T5220] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.382115][ T5220] CR2: 00007fc785a110f8 CR3: 000000007ea40000 CR4: 00000000003506f0 [ 78.390098][ T5220] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.398058][ T5220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.406036][ T5220] Call Trace: [ 78.409319][ T5220] [ 78.412243][ T5220] ? __die_body+0x88/0xe0 [ 78.416602][ T5220] ? die_addr+0x108/0x140 [ 78.420933][ T5220] ? exc_general_protection+0x3dd/0x5d0 [ 78.426494][ T5220] ? asm_exc_general_protection+0x26/0x30 [ 78.432212][ T5220] ? nilfs_btree_insert+0x696/0x1c10 [ 78.437494][ T5220] ? nilfs_btree_insert+0x6d3/0x1c10 [ 78.442783][ T5220] ? __pfx___might_resched+0x10/0x10 [ 78.448073][ T5220] ? nilfs_btree_lookup_contig+0xe86/0xfc0 [ 78.453963][ T5220] ? __pfx_nilfs_btree_insert+0x10/0x10 [ 78.459503][ T5220] ? down_write+0x18c/0x220 [ 78.464015][ T5220] ? __pfx_down_write+0x10/0x10 [ 78.468878][ T5220] nilfs_bmap_insert+0x25e/0x3c0 [ 78.474003][ T5220] ? __pfx_nilfs_bmap_insert+0x10/0x10 [ 78.479486][ T5220] ? __up_read+0x2c2/0x6b0 [ 78.483906][ T5220] ? nilfs_transaction_begin+0x4fd/0x6e0 [ 78.489539][ T5220] nilfs_get_block+0x428/0x8e0 [ 78.494326][ T5220] ? __pfx_lock_release+0x10/0x10 [ 78.499366][ T5220] ? __pfx_nilfs_get_block+0x10/0x10 [ 78.504651][ T5220] ? _raw_spin_unlock+0x28/0x50 [ 78.509501][ T5220] ? create_empty_buffers+0x53e/0x740 [ 78.514888][ T5220] __block_write_begin_int+0x50c/0x1a70 [ 78.520449][ T5220] ? folio_mapping+0x1b4/0x430 [ 78.525207][ T5220] ? __pfx_nilfs_get_block+0x10/0x10 [ 78.530491][ T5220] ? __pfx___block_write_begin_int+0x10/0x10 [ 78.536469][ T5220] ? __pfx_nilfs_get_block+0x10/0x10 [ 78.541752][ T5220] block_write_begin+0x9b/0x1e0 [ 78.546602][ T5220] nilfs_write_begin+0xa0/0x110 [ 78.551456][ T5220] generic_perform_write+0x399/0x840 [ 78.556740][ T5220] ? __pfx_generic_perform_write+0x10/0x10 [ 78.562540][ T5220] ? __generic_file_write_iter+0x105/0x230 [ 78.568338][ T5220] generic_file_write_iter+0xaf/0x310 [ 78.573699][ T5220] vfs_write+0xa72/0xc90 [ 78.577935][ T5220] ? __pfx_generic_file_write_iter+0x10/0x10 [ 78.583925][ T5220] ? __pfx_vfs_write+0x10/0x10 [ 78.588682][ T5220] ? lockdep_hardirqs_on+0x99/0x150 [ 78.593880][ T5220] ksys_write+0x1a0/0x2c0 [ 78.598303][ T5220] ? __pfx_ksys_write+0x10/0x10 [ 78.603149][ T5220] ? exc_page_fault+0x590/0x8c0 [ 78.608015][ T5220] do_syscall_64+0xf3/0x230 [ 78.612510][ T5220] ? clear_bhb_loop+0x35/0x90 [ 78.617183][ T5220] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.623071][ T5220] RIP: 0033:0x7fc785999a99 [ 78.627485][ T5220] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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 [ 78.647167][ T5220] RSP: 002b:00007fff8363c328 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 78.655572][ T5220] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc785999a99 [ 78.663532][ T5220] RDX: 0000000000004000 RSI: 0000000020000000 RDI: 0000000000000004 [ 78.671493][ T5220] RBP: 00007fc785a0d5f0 R08: 0000555573e9e4c0 R09: 0000555573e9e4c0 [ 78.679455][ T5220] R10: 0000000000000a83 R11: 0000000000000246 R12: 00007fff8363c350 [ 78.687413][ T5220] R13: 00007fff8363c578 R14: 431bde82d7b634db R15: 00007fc7859e203b [ 78.695381][ T5220] [ 78.698390][ T5220] Modules linked in: [ 78.705686][ T5220] ---[ end trace 0000000000000000 ]--- [ 78.711843][ T5220] RIP: 0010:nilfs_btree_insert+0x6d3/0x1c10 [ 78.717799][ T5220] Code: 8d 9f 80 00 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 ab 89 8a fe 48 8b 1b 48 83 c3 28 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 8e 89 8a fe 4c 89 64 24 28 48 8b [ 78.737475][ T5220] RSP: 0018:ffffc9000352f4e0 EFLAGS: 00010206 [ 78.743615][ T5220] RAX: 0000000000000005 RBX: 0000000000000028 RCX: 1ffff1100f66a0ee [ 78.751630][ T5220] RDX: ffff88807d6f9e00 RSI: 0000000000000002 RDI: 0000000000000001 [ 78.759648][ T5220] RBP: ffffc9000352f670 R08: ffffffff836d1ea6 R09: 1ffff1100469939a [ 78.767618][ T5220] R10: dffffc0000000000 R11: ffffed100469939b R12: 0000000000000000 [ 78.775637][ T5220] R13: dffffc0000000000 R14: 0000000000000002 R15: ffff88807fbd9680 [ 78.783665][ T5220] FS: 0000555573e9d380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 [ 78.792715][ T5220] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.799322][ T5220] CR2: 00005582b0414000 CR3: 000000007ea40000 CR4: 00000000003506f0 [ 78.807336][ T5220] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.815381][ T5220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.823690][ T5220] Kernel panic - not syncing: Fatal exception [ 78.830040][ T5220] Kernel Offset: disabled [ 78.834388][ T5220] Rebooting in 86400 seconds..