./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4099895767 <...> Warning: Permanently added '10.128.1.14' (ED25519) to the list of known hosts. execve("./syz-executor4099895767", ["./syz-executor4099895767"], 0x7ffd6ce93df0 /* 10 vars */) = 0 brk(NULL) = 0x5555570f1000 brk(0x5555570f1d00) = 0x5555570f1d00 arch_prctl(ARCH_SET_FS, 0x5555570f1380) = 0 set_tid_address(0x5555570f1650) = 5031 set_robust_list(0x5555570f1660, 24) = 0 rseq(0x5555570f1ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4099895767", 4096) = 28 getrandom("\xe6\x6f\xbf\x5c\xe5\x6a\x98\x73", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555570f1d00 brk(0x555557112d00) = 0x555557112d00 brk(0x555557113000) = 0x555557113000 mprotect(0x7f732a711000, 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/iommu", O_RDONLY) = 3 [ 78.192455][ T5031] iommufd_mock iommufd_mock0: Adding to iommu group 0 [ 78.199897][ T5031] iommufd_mock iommufd_mock0: Removing from iommu group 0 [ 78.208183][ T5031] general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN [ 78.219936][ T5031] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 78.228371][ T5031] CPU: 0 PID: 5031 Comm: syz-executor409 Not tainted 6.5.0-rc1-next-20230717-syzkaller #0 [ 78.238268][ T5031] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 [ 78.248322][ T5031] RIP: 0010:sysfs_remove_link_from_group+0x2b/0x80 [ 78.254849][ T5031] Code: 0f 1e fa 41 54 49 89 d4 55 48 89 f5 53 48 89 fb e8 ba 13 73 ff 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 39 48 8b 7b 30 31 d2 48 89 ee e8 81 f2 fe ff 48 85 [ 78.274463][ T5031] RSP: 0018:ffffc90003adfc18 EFLAGS: 00010206 [ 78.280535][ T5031] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 78.288514][ T5031] RDX: 0000000000000006 RSI: ffffffff8213b9d6 RDI: 0000000000000030 [ 78.296488][ T5031] RBP: ffffffff8adb0760 R08: 0000000000000001 R09: ffffed10280ca11b [ 78.304462][ T5031] R10: ffff8881406508df R11: ffffffff8a345578 R12: ffff888022507500 [ 78.312448][ T5031] R13: ffffffff8d519e20 R14: ffff888015ab8450 R15: ffff888015ab8448 [ 78.320433][ T5031] FS: 00005555570f1380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 78.329388][ T5031] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.335985][ T5031] CR2: 0000000020000000 CR3: 00000000226b9000 CR4: 00000000003506f0 [ 78.343969][ T5031] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.351953][ T5031] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.359937][ T5031] Call Trace: [ 78.363226][ T5031] [ 78.366167][ T5031] ? die_addr+0x3b/0xa0 [ 78.370349][ T5031] ? exc_general_protection+0x154/0x230 [ 78.375943][ T5031] ? asm_exc_general_protection+0x26/0x30 [ 78.381695][ T5031] ? do_syscall_64+0x38/0xb0 [ 78.386311][ T5031] ? sysfs_remove_link_from_group+0x16/0x80 [ 78.392235][ T5031] ? sysfs_remove_link_from_group+0x2b/0x80 [ 78.398154][ T5031] ? sysfs_remove_link_from_group+0x16/0x80 [ 78.404070][ T5031] iommu_deinit_device+0x111/0x580 [ 78.409213][ T5031] __iommu_group_remove_device+0x296/0x390 [ 78.415052][ T5031] iommu_group_remove_device+0x7e/0xa0 [ 78.420541][ T5031] iommufd_test+0x1b92/0x2c70 [ 78.425252][ T5031] ? iommufd_selftest_destroy+0x180/0x180 [ 78.430997][ T5031] ? vfs_fileattr_set+0xbf0/0xbf0 [ 78.436058][ T5031] iommufd_fops_ioctl+0x347/0x4d0 [ 78.441123][ T5031] ? iommufd_get_object.part.0+0x2c0/0x2c0 [ 78.446961][ T5031] ? bpf_lsm_file_ioctl+0x9/0x10 [ 78.451921][ T5031] ? iommufd_get_object.part.0+0x2c0/0x2c0 [ 78.457755][ T5031] __x64_sys_ioctl+0x18f/0x210 [ 78.462552][ T5031] do_syscall_64+0x38/0xb0 [ 78.467014][ T5031] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 78.472948][ T5031] RIP: 0033:0x7f732a69e2e9 [ 78.477378][ T5031] 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 [ 78.497017][ T5031] RSP: 002b:00007ffe820edd58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 78.505451][ T5031] RAX: ffffffffffffffda RBX: 00007ffe820edf28 RCX: 00007f732a69e2e9 [ 78.513531][ T5031] RDX: 0000000020000100 RSI: 0000000000003ba0 RDI: 0000000000000003 [ 78.521515][ T5031] RBP: 00007f732a711610 R08: 0000000000000000 R09: 00007ffe820edf28 [ 78.529501][ T5031] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 78.537481][ T5031] R13: 00007ffe820edf18 R14: 0000000000000001 R15: 0000000000000001 [ 78.545477][ T5031] [ 78.548518][ T5031] Modules linked in: [ 78.552602][ T5031] ---[ end trace 0000000000000000 ]--- [ 78.558272][ T5031] RIP: 0010:sysfs_remove_link_from_group+0x2b/0x80 [ 78.564832][ T5031] Code: 0f 1e fa 41 54 49 89 d4 55 48 89 f5 53 48 89 fb e8 ba 13 73 ff 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 39 48 8b 7b 30 31 d2 48 89 ee e8 81 f2 fe ff 48 85 [ 78.584500][ T5031] RSP: 0018:ffffc90003adfc18 EFLAGS: 00010206 [ 78.590577][ T5031] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 78.598591][ T5031] RDX: 0000000000000006 RSI: ffffffff8213b9d6 RDI: 0000000000000030 [ 78.606614][ T5031] RBP: ffffffff8adb0760 R08: 0000000000000001 R09: ffffed10280ca11b [ 78.614643][ T5031] R10: ffff8881406508df R11: ffffffff8a345578 R12: ffff888022507500 [ 78.622640][ T5031] R13: ffffffff8d519e20 R14: ffff888015ab8450 R15: ffff888015ab8448 [ 78.630665][ T5031] FS: 00005555570f1380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 78.639647][ T5031] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.646288][ T5031] CR2: 000055d13f5f7530 CR3: 00000000226b9000 CR4: 00000000003506e0 [ 78.654295][ T5031] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.662280][ T5031] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.670316][ T5031] Kernel panic - not syncing: Fatal exception [ 78.676712][ T5031] Kernel Offset: disabled [ 78.681043][ T5031] Rebooting in 86400 seconds..