./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2494609470 <...> Warning: Permanently added '10.128.1.131' (ED25519) to the list of known hosts. execve("./syz-executor2494609470", ["./syz-executor2494609470"], 0x7ffc87d16170 /* 10 vars */) = 0 brk(NULL) = 0x55556aa78000 brk(0x55556aa78d00) = 0x55556aa78d00 arch_prctl(ARCH_SET_FS, 0x55556aa78380) = 0 set_tid_address(0x55556aa78650) = 5081 set_robust_list(0x55556aa78660, 24) = 0 rseq(0x55556aa78ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2494609470", 4096) = 28 getrandom("\x9f\x67\xce\xc0\x41\xa7\xe2\xd4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556aa78d00 brk(0x55556aa99d00) = 0x55556aa99d00 brk(0x55556aa9a000) = 0x55556aa9a000 mprotect(0x7f27665a8000, 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 syzkaller login: [ 67.702426][ T5081] usercopy: Kernel memory overwrite attempt detected to SLUB object 'kmalloc-16' (offset 8, size 9)! [ 67.714586][ T5081] ------------[ cut here ]------------ [ 67.720094][ T5081] kernel BUG at mm/usercopy.c:102! [ 67.725383][ T5081] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI [ 67.732506][ T5081] CPU: 1 PID: 5081 Comm: syz-executor249 Not tainted 6.9.0-rc2-next-20240402-syzkaller #0 [ 67.742494][ T5081] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 67.752645][ T5081] RIP: 0010:usercopy_abort+0x84/0x90 [ 67.757952][ T5081] Code: 49 89 ce 48 c7 c3 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 [ 67.778431][ T5081] RSP: 0018:ffffc90003dbfd78 EFLAGS: 00010286 [ 67.784717][ T5081] RAX: 0000000000000062 RBX: ffffffff8bd827e0 RCX: 2b2ecef8eabe4800 [ 67.792895][ T5081] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 67.800958][ T5081] RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920007b7f4c [ 67.809022][ T5081] R10: dffffc0000000000 R11: fffff520007b7f4d R12: ffffea00008fe840 [ 67.817188][ T5081] R13: 0000000000000009 R14: 0000000000000008 R15: 0000000000000009 [ 67.825162][ T5081] FS: 000055556aa78380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 [ 67.834187][ T5081] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.840859][ T5081] CR2: 0000000020000040 CR3: 0000000076e74000 CR4: 00000000003506f0 [ 67.850304][ T5081] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.858284][ T5081] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.866447][ T5081] Call Trace: [ 67.869746][ T5081] [ 67.872675][ T5081] ? __die_body+0x88/0xe0 [ 67.877058][ T5081] ? die+0xcf/0x110 [ 67.880877][ T5081] ? do_trap+0x15a/0x3a0 [ 67.885165][ T5081] ? usercopy_abort+0x84/0x90 [ 67.889846][ T5081] ? do_error_trap+0x1dc/0x2c0 [ 67.894619][ T5081] ? usercopy_abort+0x84/0x90 [ 67.899298][ T5081] ? __pfx_do_error_trap+0x10/0x10 [ 67.904435][ T5081] ? handle_invalid_op+0x34/0x40 [ 67.909452][ T5081] ? usercopy_abort+0x84/0x90 [ 67.914564][ T5081] ? exc_invalid_op+0x38/0x50 [ 67.919244][ T5081] ? asm_exc_invalid_op+0x1a/0x20 [ 67.924288][ T5081] ? __wake_up_klogd+0xcc/0x110 [ 67.929192][ T5081] ? usercopy_abort+0x84/0x90 [ 67.933863][ T5081] __check_heap_object+0xb1/0x100 [ 67.938981][ T5081] __check_object_size+0x1e3/0x900 [ 67.944113][ T5081] do_handle_open+0x1f6/0x660 [ 67.948881][ T5081] ? __pfx_do_handle_open+0x10/0x10 [ 67.954088][ T5081] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 67.960438][ T5081] ? exc_page_fault+0x585/0x8e0 [ 67.965999][ T5081] do_syscall_64+0xfb/0x240 [ 67.970502][ T5081] entry_SYSCALL_64_after_hwframe+0x72/0x7a [ 67.976404][ T5081] RIP: 0033:0x7f27665352a9 [ 67.980825][ T5081] 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 [ 68.000479][ T5081] RSP: 002b:00007ffe7e4589d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130 [ 68.008876][ T5081] RAX: ffffffffffffffda RBX: 00007ffe7e458bb8 RCX: 00007f27665352a9 [ 68.017122][ T5081] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 00000000ffffffff [ 68.025081][ T5081] RBP: 00007f27665a8610 R08: 0000000000000000 R09: 0000000000000000 [ 68.033230][ T5081] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 68.041220][ T5081] R13: 00007ffe7e458ba8 R14: 0000000000000001 R15: 0000000000000001 [ 68.049213][ T5081] [ 68.052244][ T5081] Modules linked in: [ 68.057628][ T5081] ---[ end trace 0000000000000000 ]--- [ 68.063169][ T5081] RIP: 0010:usercopy_abort+0x84/0x90 [ 68.068773][ T5081] Code: 49 89 ce 48 c7 c3 e0 27 d8 8b 48 0f 44 de 48 c7 c7 80 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 b1 6f 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 [ 68.089753][ T5081] RSP: 0018:ffffc90003dbfd78 EFLAGS: 00010286 [ 68.095886][ T5081] RAX: 0000000000000062 RBX: ffffffff8bd827e0 RCX: 2b2ecef8eabe4800 [ 68.104101][ T5081] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 68.112181][ T5081] RBP: 0000000000000008 R08: ffffffff81760b9c R09: 1ffff920007b7f4c [ 68.120164][ T5081] R10: dffffc0000000000 R11: fffff520007b7f4d R12: ffffea00008fe840 [ 68.128327][ T5081] R13: 0000000000000009 R14: 0000000000000008 R15: 0000000000000009 [ 68.136449][ T5081] FS: 000055556aa78380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 [ 68.145694][ T5081] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.152391][ T5081] CR2: 0000000020000040 CR3: 0000000076e74000 CR4: 00000000003506f0 [ 68.160911][ T5081] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.169390][ T5081] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.177524][ T5081] Kernel panic - not syncing: Fatal exception [ 68.183989][ T5081] Kernel Offset: disabled [ 68.188650][ T5081] Rebooting in 86400 seconds..