Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057] CPU: 1 UID: 0 PID: 13424 Comm: syz-executor Not tainted 6.13.0-rc3-syzkaller-00017-gf44d154d6e3d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:idr_find+0x26/0x50 lib/idr.c:174 Code: 90 90 90 90 f3 0f 1e fa 55 48 89 f5 53 48 89 fb e8 2f 91 89 f6 48 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 13 8b 43 50 48 89 ee 48 89 df 5b RSP: 0018:ffffc90003117818 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81641519 RDX: 000000000000000a RSI: ffffffff8b0fbdc1 RDI: 0000000000000050 RBP: 000000000000061d R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888026b64980 R14: 0000000000000000 R15: 0000000010000000 FS: 000055558b867500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc77e2eec8 CR3: 000000007ad8c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_pid_ns kernel/pid.c:320 [inline] find_task_by_pid_ns+0x36/0xc0 kernel/pid.c:430 proc_pid_lookup+0xfd/0x500 fs/proc/base.c:3517 proc_root_lookup+0x23/0x70 fs/proc/root.c:325 __lookup_slow+0x24f/0x460 fs/namei.c:1791 lookup_slow fs/namei.c:1808 [inline] walk_component+0x350/0x5b0 fs/namei.c:2112 link_path_walk.part.0.constprop.0+0x53a/0xd40 fs/namei.c:2474 link_path_walk fs/namei.c:2409 [inline] path_openat+0x228/0x2d60 fs/namei.c:3983 do_filp_open+0x20c/0x470 fs/namei.c:4014 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1428 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f451a384680 Code: 48 89 44 24 20 75 93 44 89 54 24 0c e8 49 94 02 00 44 8b 54 24 0c 89 da 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 38 44 89 c7 89 44 24 0c e8 9c 94 02 00 8b 44 RSP: 002b:00007ffc77e2f520 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000080001 RCX: 00007f451a384680 RDX: 0000000000080001 RSI: 00007f451a40320c RDI: 00000000ffffff9c RBP: 00007f451a40320c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000004 R13: 00007ffc77e2f5c0 R14: 00007ffc77e2fb20 R15: 00007ffc77e2fb20 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:idr_find+0x26/0x50 lib/idr.c:174 Code: 90 90 90 90 f3 0f 1e fa 55 48 89 f5 53 48 89 fb e8 2f 91 89 f6 48 8d 7b 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 13 8b 43 50 48 89 ee 48 89 df 5b RSP: 0018:ffffc90003117818 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81641519 RDX: 000000000000000a RSI: ffffffff8b0fbdc1 RDI: 0000000000000050 RBP: 000000000000061d R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffff888026b64980 R14: 0000000000000000 R15: 0000000010000000 FS: 000055558b867500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055558b867808 CR3: 000000007ad8c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: f3 0f 1e fa endbr64 8: 55 push %rbp 9: 48 89 f5 mov %rsi,%rbp c: 53 push %rbx d: 48 89 fb mov %rdi,%rbx 10: e8 2f 91 89 f6 call 0xf6899144 15: 48 8d 7b 50 lea 0x50(%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: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 04 je 0x36 32: 3c 03 cmp $0x3,%al 34: 7e 13 jle 0x49 36: 8b 43 50 mov 0x50(%rbx),%eax 39: 48 89 ee mov %rbp,%rsi 3c: 48 89 df mov %rbx,%rdi 3f: 5b pop %rbx