Oops: general protection fault, probably for non-canonical address 0xdffffc000000002e: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000170-0x0000000000000177] CPU: 0 UID: 0 PID: 4397 Comm: syz-executor.4 Not tainted 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:nsproxy_free+0x28a/0x5a0 Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 4f 47 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00 RSP: 0018:ffff8880162ff9f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000b429000 RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174 RBP: ffff8880178afdd0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8664ca57 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88801f63141c R14: ffff888018a8d860 R15: ffff88801b550878 loop2: detected capacity change from 0 to 736 FS: 00007f1887a9e700(0000) GS:ffff8880e5397000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56d9ccd718 CR3: 000000001778d000 CR4: 0000000000350ef0 Call Trace: create_new_namespaces+0x585/0x750 copy_namespaces+0x45c/0x580 copy_process+0x26e4/0x72a0 kernel_clone+0xea/0x7f0 loop7: detected capacity change from 0 to 264192 __do_sys_clone3+0x1f5/0x280 tmpfs: Bad value for 'size' do_syscall_64+0xbf/0x430 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f188a549b19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1887a9e188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f188a65d020 RCX: 00007f188a549b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880 RBP: 00007f188a5a3f6d R08: 0000000000000000 R09: 0000000000000000 iso9660: Unknown parameter 'chb3ÿÿ")[eck' R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc718c99bf R14: 00007f1887a9e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- loop7: detected capacity change from 0 to 264192 RIP: 0010:nsproxy_free+0x28a/0x5a0 Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 4f 47 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00 RSP: 0018:ffff8880162ff9f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc9000b429000 RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174 iso9660: Unknown parameter 'subj_user' RBP: ffff8880178afdd0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8664ca57 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88801f63141c R14: ffff888018a8d860 R15: ffff88801b550878 FS: 00007f1887a9e700(0000) GS:ffff8880e5397000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f56d9ccd718 CR3: 000000001778d000 CR4: 0000000000350ef0 loop2: detected capacity change from 0 to 736 iso9660: Unknown parameter 'chb3ÿÿ")[eck' loop7: detected capacity change from 0 to 264192 tmpfs: Bad value for 'size' loop7: detected capacity change from 0 to 264192 iso9660: Unknown parameter 'subj_user' tmpfs: Bad value for 'mpol' audit: type=1400 audit(1763020627.056:14): avc: denied { relabelto } for pid=4432 comm="syz-executor.2" name="file0" dev="sda" ino=16016 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:vhost_device_t:s0 tclass=file permissive=1 tmpfs: Bad value for 'mpol' audit: type=1400 audit(1763020627.058:15): avc: denied { write } for pid=4432 comm="syz-executor.2" name="file0" dev="sda" ino=16016 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:vhost_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1763020627.063:16): avc: denied { open } for pid=4432 comm="syz-executor.2" path="/syzkaller-testdir188758925/syzkaller.3Gdq8S/15/file0" dev="sda" ino=16016 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:vhost_device_t:s0 tclass=file permissive=1 audit: type=1400 audit(1763020627.065:17): avc: denied { ioctl } for pid=4432 comm="syz-executor.2" path="/syzkaller-testdir188758925/syzkaller.3Gdq8S/15/file0" dev="sda" ino=16016 ioctlcmd=0x937e scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:vhost_device_t:s0 tclass=file permissive=1 ---------------- Code disassembly (best guess): 0: 02 00 add (%rax),%al 2: 00 4c 8b 65 add %cl,0x65(%rbx,%rcx,4) 6: 28 4d 85 sub %cl,-0x7b(%rbp) 9: e4 74 in $0x74,%al b: 43 e8 4f 47 30 00 rex.XB callq 0x304760 11: 49 8d bc 24 78 01 00 lea 0x178(%r12),%rdi 18: 00 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: 0f 85 f7 02 00 00 jne 0x32b 34: 49 8b 9c 24 78 01 00 mov 0x178(%r12),%rbx 3b: 00 3c: bf .byte 0xbf 3d: 08 00 or %al,(%rax)