./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1960942795 <...> Warning: Permanently added '10.128.0.207' (ED25519) to the list of known hosts. execve("./syz-executor1960942795", ["./syz-executor1960942795"], 0x7ffed816dc50 /* 10 vars */) = 0 brk(NULL) = 0x555592670000 brk(0x555592670d00) = 0x555592670d00 arch_prctl(ARCH_SET_FS, 0x555592670380) = 0 set_tid_address(0x555592670650) = 5223 set_robust_list(0x555592670660, 24) = 0 rseq(0x555592670ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1960942795", 4096) = 28 getrandom("\x02\xe2\x41\xc2\x1b\x95\xb0\x85", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555592670d00 brk(0x555592691d00) = 0x555592691d00 brk(0x555592692000) = 0x555592692000 mprotect(0x7fb9c921a000, 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 5224 attached , child_tidptr=0x555592670650) = 5224 [pid 5224] set_robust_list(0x555592670660, 24) = 0 [pid 5224] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5224] setpgid(0, 0) = 0 [pid 5224] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5224] write(3, "1000", 4) = 4 [pid 5224] close(3) = 0 [pid 5224] write(1, "executing program\n", 18executing program ) = 18 [pid 5224] memfd_create("syzkaller", 0) = 3 [pid 5224] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb9c0c00000 [pid 5224] 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"..., 524288) = 524288 [pid 5224] munmap(0x7fb9c0c00000, 138412032) = 0 [pid 5224] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5224] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5224] close(3) = 0 [pid 5224] close(4) = 0 [pid 5224] mkdir("./file1", 0777) = 0 [ 77.955721][ T5224] loop0: detected capacity change from 0 to 1024 [pid 5224] mount("/dev/loop0", "./file1", "ext4", 0, "user_xattr,noquota,barrier=0x0000000000000006,jqfmt=vfsv1,block_validity,max_dir_size_kb=0x000000000"...) = 0 [pid 5224] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5224] chdir("./file1") = 0 [pid 5224] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5224] memfd_create("syzkaller", 0) = 4 [pid 5224] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb9c0c00000 [pid 5224] write(4, "\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"..., 262144) = 262144 [pid 5224] munmap(0x7fb9c0c00000, 138412032) = 0 [pid 5224] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5224] close(4) = 0 [pid 5224] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_SYNC|FASYNC, 000) = 4 [pid 5224] mkdir(".", 0777) = -1 EEXIST (File exists) [ 77.997986][ T5224] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. [pid 5224] mount(NULL, ".", 0x20000f40, MS_NOEXEC|MS_SYNCHRONOUS|MS_REMOUNT|MS_NOATIME|MS_MOVE|MS_SILENT|MS_PRIVATE|MS_RELATIME|MS_I_VERSION|MS_STRICTATIME, ",oldalloc,stripe=0x0000000000000005,") = 0 [pid 5224] openat(AT_FDCWD, ".", O_RDONLY|O_DIRECTORY) = 5 [pid 5224] chdir(".") = 0 [ 78.051476][ T5224] EXT4-fs: Ignoring removed oldalloc option [ 78.059801][ T5224] EXT4-fs (loop0): re-mounted 00000000-0000-0000-0000-000000000000 r/w. Quota mode: none. [ 78.094081][ T5224] Oops: divide error: 0000 [#1] PREEMPT SMP KASAN PTI [ 78.100902][ T5224] CPU: 0 UID: 0 PID: 5224 Comm: syz-executor196 Not tainted 6.11.0-rc2-syzkaller-00111-gee9a43b7cfe2 #0 [ 78.112022][ T5224] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 78.122082][ T5224] RIP: 0010:ext4_mb_regular_allocator+0x1687/0x3b80 [ 78.128881][ T5224] Code: 16 00 00 8b 1a bf 40 00 00 00 89 de e8 e2 ab 38 ff 48 83 fb 3f 0f 87 9f 19 00 00 e8 93 a7 38 ff 89 d9 49 d3 ec 4c 89 f8 31 d2 <49> f7 f4 48 89 d3 31 ff 48 89 d6 e8 59 ac 38 ff 83 bc 24 64 01 00 [ 78.148511][ T5224] RSP: 0018:ffffc9000341e740 EFLAGS: 00010246 [ 78.154612][ T5224] RAX: 0000000000000001 RBX: 0000000000000004 RCX: 0000000000000004 [ 78.162600][ T5224] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000040 [ 78.170659][ T5224] RBP: ffffc9000341e9f0 R08: ffffffff825acf3e R09: ffffffff825bea62 [ 78.178888][ T5224] R10: 0000000000000005 R11: ffff8880282b1e00 R12: 0000000000000000 [ 78.186940][ T5224] R13: 0000000000000003 R14: ffff8880663270e0 R15: 0000000000000001 [ 78.195006][ T5224] FS: 0000555592670380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 [ 78.204042][ T5224] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.210724][ T5224] CR2: 00007ffe13f0d000 CR3: 0000000025072000 CR4: 00000000003506f0 [ 78.218705][ T5224] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.226694][ T5224] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.234705][ T5224] Call Trace: [ 78.238031][ T5224] [ 78.240993][ T5224] ? __die_body+0x88/0xe0 [ 78.245344][ T5224] ? die+0xcf/0x110 [ 78.249294][ T5224] ? do_trap+0x15a/0x3a0 [ 78.253729][ T5224] ? ext4_mb_regular_allocator+0x1687/0x3b80 [ 78.259821][ T5224] ? do_error_trap+0x1dc/0x2c0 [ 78.264595][ T5224] ? ext4_mb_regular_allocator+0x1687/0x3b80 [ 78.270687][ T5224] ? ext4_get_group_info+0x103/0x400 [ 78.276238][ T5224] ? __pfx_do_error_trap+0x10/0x10 [ 78.281569][ T5224] ? rcu_is_watching+0x15/0xb0 [ 78.286385][ T5224] ? exc_divide_error+0x39/0x50 [ 78.291447][ T5224] ? ext4_mb_regular_allocator+0x1687/0x3b80 [ 78.297544][ T5224] ? asm_exc_divide_error+0x1a/0x20 [ 78.302859][ T5224] ? ext4_mb_good_group+0x192/0x5c0 [ 78.308137][ T5224] ? ext4_mb_regular_allocator+0x166e/0x3b80 [ 78.314140][ T5224] ? ext4_mb_regular_allocator+0x1687/0x3b80 [ 78.320217][ T5224] ? kasan_save_track+0x51/0x80 [ 78.325084][ T5224] ? kasan_save_track+0x3f/0x80 [ 78.330063][ T5224] ? __pfx_ext4_mb_regular_allocator+0x10/0x10 [ 78.336245][ T5224] ? ext4_mb_new_blocks+0xfff/0x4e30 [ 78.341538][ T5224] ? rcu_is_watching+0x15/0xb0 [ 78.346324][ T5224] ? trace_kmem_cache_alloc+0x1f/0xc0 [ 78.351715][ T5224] ? kmem_cache_alloc_noprof+0x185/0x2a0 [ 78.357353][ T5224] ext4_mb_new_blocks+0x10a8/0x4e30 [ 78.362584][ T5224] ? ext4_find_extent+0x379/0xe20 [ 78.367628][ T5224] ? rcu_is_watching+0x15/0xb0 [ 78.372414][ T5224] ? ext4_find_extent+0x379/0xe20 [ 78.377539][ T5224] ? ext4_find_extent+0x379/0xe20 [ 78.382570][ T5224] ? trace_kmalloc+0x1f/0xd0 [ 78.387167][ T5224] ? __kmalloc_noprof+0x21a/0x400 [ 78.392291][ T5224] ? __pfx_ext4_mb_new_blocks+0x10/0x10 [ 78.397837][ T5224] ? ext4_find_extent+0xb68/0xe20 [ 78.402894][ T5224] ? ext4_ext_search_right+0x4ab/0x860 [ 78.408352][ T5224] ? ext4_ext_check_overlap+0x180/0x5b0 [ 78.413897][ T5224] ? ext4_inode_to_goal_block+0x317/0x450 [ 78.419641][ T5224] ext4_ext_map_blocks+0x1c74/0x77b0 [ 78.424980][ T5224] ? __pfx_ext4_ext_map_blocks+0x10/0x10 [ 78.430635][ T5224] ? __pfx_lock_acquire+0x10/0x10 [ 78.435666][ T5224] ? __pfx___might_resched+0x10/0x10 [ 78.440963][ T5224] ? ext4_es_lookup_extent+0x61a/0xa90 [ 78.446451][ T5224] ext4_map_blocks+0xa5e/0x1d20 [ 78.451312][ T5224] ? __lock_acquire+0x137a/0x2040 [ 78.456367][ T5224] ? __pfx_ext4_map_blocks+0x10/0x10 [ 78.461980][ T5224] _ext4_get_block+0x239/0x6b0 [ 78.466924][ T5224] ? create_empty_buffers+0x53e/0x740 [ 78.472419][ T5224] ? do_raw_spin_lock+0x14f/0x370 [ 78.477480][ T5224] ? __pfx__ext4_get_block+0x10/0x10 [ 78.482903][ T5224] ? _raw_spin_unlock+0x28/0x50 [ 78.487789][ T5224] ext4_get_block_unwritten+0x2f/0x100 [ 78.493328][ T5224] __block_write_begin_int+0x50c/0x1a70 [ 78.498978][ T5224] ? __brelse+0x59/0xa0 [ 78.503137][ T5224] ? __pfx_ext4_get_block_unwritten+0x10/0x10 [ 78.509244][ T5224] ? __pfx___block_write_begin_int+0x10/0x10 [ 78.515230][ T5224] ? ext4_inode_journal_mode+0x18b/0x460 [ 78.521125][ T5224] ? __block_write_begin+0x64/0x150 [ 78.526350][ T5224] ext4_try_to_write_inline_data+0x7ed/0x1360 [ 78.532530][ T5224] ? __pfx_ext4_try_to_write_inline_data+0x10/0x10 [ 78.539036][ T5224] ? __pfx_from_kprojid+0x10/0x10 [ 78.544171][ T5224] ext4_write_begin+0x2a0/0x10e0 [ 78.549183][ T5224] ? __pfx_ext4_write_begin+0x10/0x10 [ 78.555015][ T5224] ext4_da_write_begin+0x300/0xa70 [ 78.560140][ T5224] ? __pfx_fault_in_readable+0x10/0x10 [ 78.565672][ T5224] ? __pfx_ext4_da_write_begin+0x10/0x10 [ 78.571335][ T5224] ? fault_in_iov_iter_readable+0x19f/0x280 [ 78.577378][ T5224] generic_perform_write+0x399/0x840 [ 78.582695][ T5224] ? __pfx_generic_perform_write+0x10/0x10 [ 78.588578][ T5224] ? ext4_write_checks+0x256/0x2c0 [ 78.593739][ T5224] ext4_buffered_write_iter+0xc6/0x350 [ 78.599247][ T5224] ext4_file_write_iter+0x1de/0x1a10 [ 78.604564][ T5224] ? __pfx_ext4_file_write_iter+0x10/0x10 [ 78.610419][ T5224] do_iter_readv_writev+0x60a/0x890 [ 78.615634][ T5224] ? __pfx_do_iter_readv_writev+0x10/0x10 [ 78.621460][ T5224] ? rcu_read_lock_any_held+0xb7/0x160 [ 78.626933][ T5224] vfs_writev+0x37c/0xbb0 [ 78.631275][ T5224] ? __pfx_vfs_writev+0x10/0x10 [ 78.636141][ T5224] ? _raw_spin_unlock_irq+0x2e/0x50 [ 78.641372][ T5224] ? ptrace_notify+0x279/0x380 [ 78.646171][ T5224] __se_sys_pwritev2+0x1ca/0x2d0 [ 78.651210][ T5224] ? __pfx___se_sys_pwritev2+0x10/0x10 [ 78.656845][ T5224] ? do_syscall_64+0x100/0x230 [ 78.661810][ T5224] ? __x64_sys_pwritev2+0x21/0xf0 [ 78.666859][ T5224] do_syscall_64+0xf3/0x230 [ 78.671382][ T5224] ? clear_bhb_loop+0x35/0x90 [ 78.676529][ T5224] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.682570][ T5224] RIP: 0033:0x7fb9c91a61d9 [ 78.687014][ T5224] 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 [ 78.706646][ T5224] RSP: 002b:00007ffe13f0c6c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 [ 78.715074][ T5224] RAX: ffffffffffffffda RBX: 00007fb9c91ef095 RCX: 00007fb9c91a61d9 [ 78.723145][ T5224] RDX: 000000000000000f RSI: 00000000200002c0 RDI: 0000000000000004 [ 78.731419][ T5224] RBP: 0031656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 78.739670][ T5224] R10: 0000000000000a12 R11: 0000000000000246 R12: 70756f7267647362 [ 78.747681][ T5224] R13: 7461785f72657375 R14: 431bde82d7b634db R15: 00007fb9c91ef03b [ 78.755720][ T5224] [ 78.758744][ T5224] Modules linked in: [ 78.762893][ T5224] ---[ end trace 0000000000000000 ]--- [ 78.769699][ T5224] RIP: 0010:ext4_mb_regular_allocator+0x1687/0x3b80 [ 78.776377][ T5224] Code: 16 00 00 8b 1a bf 40 00 00 00 89 de e8 e2 ab 38 ff 48 83 fb 3f 0f 87 9f 19 00 00 e8 93 a7 38 ff 89 d9 49 d3 ec 4c 89 f8 31 d2 <49> f7 f4 48 89 d3 31 ff 48 89 d6 e8 59 ac 38 ff 83 bc 24 64 01 00 [ 78.796328][ T5224] RSP: 0018:ffffc9000341e740 EFLAGS: 00010246 [ 78.802507][ T5224] RAX: 0000000000000001 RBX: 0000000000000004 RCX: 0000000000000004 [ 78.810551][ T5224] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000040 [ 78.818591][ T5224] RBP: ffffc9000341e9f0 R08: ffffffff825acf3e R09: ffffffff825bea62 [ 78.826611][ T5224] R10: 0000000000000005 R11: ffff8880282b1e00 R12: 0000000000000000 [ 78.834687][ T5224] R13: 0000000000000003 R14: ffff8880663270e0 R15: 0000000000000001 [ 78.842849][ T5224] FS: 0000555592670380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 [ 78.851859][ T5224] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.858501][ T5224] CR2: 00007ffe13f0d000 CR3: 0000000025072000 CR4: 00000000003506f0 [ 78.866491][ T5224] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.874549][ T5224] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.882691][ T5224] Kernel panic - not syncing: Fatal exception [ 78.889282][ T5224] Kernel Offset: disabled [ 78.893619][ T5224] Rebooting in 86400 seconds..