RBP: 00007f1c02d2b090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f1c02026038 R14: 00007f1c02025fa0 R15: 00007ffce1f79368 Oops: general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] CPU: 2 UID: 0 PID: 6506 Comm: syz.3.247 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:path_put+0x22/0x70 fs/namei.c:722 Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 63 50 78 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 29 48 8b 7b 08 e8 4f 97 04 00 48 89 da 48 b8 00 00 RSP: 0018:ffffc90006aafa68 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000000000003c RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffffffff8292147d RDI: 0000000000000044 RBP: ffffc90006aafbf8 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff9b73bc40 R11: 0000000000000000 R12: ffff88803d63ad08 R13: ffff88803ee21c20 R14: ffff888026d90980 R15: fffffffffffffff4 FS: 00007f1c02d2b6c0(0000) GS:ffff8880d5fec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f155035da08 CR3: 000000005a90d000 CR4: 0000000000352ef0 Call Trace: free_trace_uprobe kernel/trace/trace_uprobe.c:374 [inline] free_trace_uprobe kernel/trace/trace_uprobe.c:369 [inline] __free_free_trace_uprobe kernel/trace/trace_uprobe.c:536 [inline] __trace_uprobe_create+0x96d/0x22f0 kernel/trace/trace_uprobe.c:545 trace_probe_create+0xef/0x100 kernel/trace/trace_probe.c:2371 dyn_event_create+0x46/0x70 kernel/trace/trace_dynevent.c:128 create_or_delete_trace_uprobe+0x5a/0xb0 kernel/trace/trace_uprobe.c:739 trace_parse_run_command+0x1ab/0x3b0 kernel/trace/trace.c:9565 vfs_write+0x2aa/0x1050 fs/read_write.c:685 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1c01d9e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1c02d2b028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1c02025fa0 RCX: 00007f1c01d9e0d9 RDX: 000000000000000f RSI: 0000200000000180 RDI: 0000000000000004 RBP: 00007f1c02d2b090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f1c02026038 R14: 00007f1c02025fa0 R15: 00007ffce1f79368 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:path_put+0x22/0x70 fs/namei.c:722 Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 63 50 78 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 29 48 8b 7b 08 e8 4f 97 04 00 48 89 da 48 b8 00 00 RSP: 0018:ffffc90006aafa68 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 000000000000003c RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffffffff8292147d RDI: 0000000000000044 RBP: ffffc90006aafbf8 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff9b73bc40 R11: 0000000000000000 R12: ffff88803d63ad08 R13: ffff88803ee21c20 R14: ffff888026d90980 R15: fffffffffffffff4 FS: 00007f1c02d2b6c0(0000) GS:ffff8880d5fec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f155035da08 CR3: 000000005a90d000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: f3 0f 1e fa endbr64 c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 63 50 78 ff call 0xff785078 15: 48 8d 7b 08 lea 0x8(%rbx),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 29 jne 0x59 30: 48 8b 7b 08 mov 0x8(%rbx),%rdi 34: e8 4f 97 04 00 call 0x49788 39: 48 89 da mov %rbx,%rdx 3c: 48 rex.W 3d: b8 .byte 0xb8