./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor178326245 <...> Warning: Permanently added '10.128.0.123' (ED25519) to the list of known hosts. execve("./syz-executor178326245", ["./syz-executor178326245"], 0x7ffc75c17340 /* 10 vars */) = 0 brk(NULL) = 0x5555560d7000 brk(0x5555560d7d00) = 0x5555560d7d00 arch_prctl(ARCH_SET_FS, 0x5555560d7380) = 0 set_tid_address(0x5555560d7650) = 5053 set_robust_list(0x5555560d7660, 24) = 0 rseq(0x5555560d7ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor178326245", 4096) = 27 getrandom("\xa3\x63\x5a\x99\xb3\x3f\xe0\xdd", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555560d7d00 brk(0x5555560f8d00) = 0x5555560f8d00 brk(0x5555560f9000) = 0x5555560f9000 mprotect(0x7f5fb028a000, 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 [ 93.389343][ T5053] divide error: 0000 [#1] PREEMPT SMP KASAN [ 93.395297][ T5053] CPU: 1 PID: 5053 Comm: syz-executor178 Not tainted 6.6.0-rc6-next-20231023-syzkaller #0 [ 93.405230][ T5053] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 [ 93.415513][ T5053] RIP: 0010:iommufd_test+0x1fd/0x35c0 [ 93.420939][ T5053] Code: 04 02 48 89 4c 24 28 84 c0 74 09 3c 03 7f 05 e8 69 ac 2f fd 48 8b 04 24 31 d2 31 ff 48 8b 5c 24 20 44 8b 68 08 48 8b 44 24 28 <48> f7 f3 48 89 d5 48 89 d6 e8 85 cf d8 fc 48 85 ed 0f 85 ce 22 00 [ 93.440561][ T5053] RSP: 0018:ffffc90003937cb0 EFLAGS: 00010246 [ 93.446638][ T5053] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 93.454618][ T5053] RDX: 0000000000000000 RSI: ffffffff84affaf2 RDI: 0000000000000000 [ 93.462597][ T5053] RBP: 000000000000000d R08: 0000000000000005 R09: 000000000000000d [ 93.470592][ T5053] R10: 000000000000000d R11: 0000000000000000 R12: 0000000000000000 [ 93.478582][ T5053] R13: 0000000000000000 R14: ffffc90003937e40 R15: ffffc90003937e00 [ 93.486573][ T5053] FS: 00005555560d7380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 93.495540][ T5053] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.502225][ T5053] CR2: 0000000020006000 CR3: 0000000075a85000 CR4: 00000000003506f0 [ 93.510220][ T5053] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.518215][ T5053] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.526204][ T5053] Call Trace: [ 93.529494][ T5053] [ 93.532434][ T5053] ? show_regs+0x8e/0xa0 [ 93.536715][ T5053] ? die+0x36/0xa0 [ 93.540452][ T5053] ? do_trap+0x22a/0x420 [ 93.544736][ T5053] ? iommufd_test+0x1fd/0x35c0 [ 93.549523][ T5053] ? iommufd_test+0x1fd/0x35c0 [ 93.554295][ T5053] ? do_error_trap+0xf4/0x230 [ 93.559007][ T5053] ? iommufd_test+0x1fd/0x35c0 [ 93.563786][ T5053] ? exc_divide_error+0x38/0x50 [ 93.568687][ T5053] ? iommufd_test+0x1fd/0x35c0 [ 93.573461][ T5053] ? asm_exc_divide_error+0x1a/0x20 [ 93.578703][ T5053] ? iommufd_test+0x112/0x35c0 [ 93.583476][ T5053] ? iommufd_test+0x1fd/0x35c0 [ 93.588269][ T5053] ? preempt_count_sub+0x150/0x150 [ 93.593390][ T5053] ? iommufd_selftest_destroy+0x100/0x100 [ 93.599134][ T5053] ? __might_fault+0xe3/0x190 [ 93.603834][ T5053] iommufd_fops_ioctl+0x35a/0x4e0 [ 93.609097][ T5053] ? iommufd_destroy+0x180/0x180 [ 93.614071][ T5053] ? bpf_lsm_file_ioctl+0x9/0x10 [ 93.619049][ T5053] ? iommufd_destroy+0x180/0x180 [ 93.624010][ T5053] __x64_sys_ioctl+0x18f/0x210 [ 93.628793][ T5053] do_syscall_64+0x3f/0x110 [ 93.633316][ T5053] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 93.639224][ T5053] RIP: 0033:0x7f5fb02172e9 [ 93.643644][ T5053] 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 [ 93.663262][ T5053] RSP: 002b:00007ffd74d26068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 93.671698][ T5053] RAX: ffffffffffffffda RBX: 00007ffd74d26238 RCX: 00007f5fb02172e9 [ 93.679677][ T5053] RDX: 0000000020000140 RSI: 0000000000003ba0 RDI: 0000000000000003 [ 93.687654][ T5053] RBP: 00007f5fb028a610 R08: 0000000000000000 R09: 00007ffd74d26238 [ 93.695630][ T5053] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 93.703616][ T5053] R13: 00007ffd74d26228 R14: 0000000000000001 R15: 0000000000000001 [ 93.711688][ T5053] [ 93.714707][ T5053] Modules linked in: [ 93.719808][ T5053] ---[ end trace 0000000000000000 ]--- [ 93.725367][ T5053] RIP: 0010:iommufd_test+0x1fd/0x35c0 [ 93.730838][ T5053] Code: 04 02 48 89 4c 24 28 84 c0 74 09 3c 03 7f 05 e8 69 ac 2f fd 48 8b 04 24 31 d2 31 ff 48 8b 5c 24 20 44 8b 68 08 48 8b 44 24 28 <48> f7 f3 48 89 d5 48 89 d6 e8 85 cf d8 fc 48 85 ed 0f 85 ce 22 00 [ 93.750599][ T5053] RSP: 0018:ffffc90003937cb0 EFLAGS: 00010246 [ 93.756726][ T5053] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 93.764759][ T5053] RDX: 0000000000000000 RSI: ffffffff84affaf2 RDI: 0000000000000000 [ 93.772809][ T5053] RBP: 000000000000000d R08: 0000000000000005 R09: 000000000000000d [ 93.780844][ T5053] R10: 000000000000000d R11: 0000000000000000 R12: 0000000000000000 [ 93.789047][ T5053] R13: 0000000000000000 R14: ffffc90003937e40 R15: ffffc90003937e00 [ 93.797039][ T5053] FS: 00005555560d7380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 93.806070][ T5053] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.812734][ T5053] CR2: 0000000020006000 CR3: 0000000075a85000 CR4: 00000000003506f0 [ 93.820777][ T5053] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.828817][ T5053] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.836823][ T5053] Kernel panic - not syncing: Fatal exception [ 93.843104][ T5053] Kernel Offset: disabled [ 93.847455][ T5053] Rebooting in 86400 seconds..