Oops: general protection fault, probably for non-canonical address 0xdffffc000000002e: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000170-0x0000000000000177] CPU: 1 UID: 0 PID: 4788 Comm: syz-executor.3 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:ffff88804a3979f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90008cd0000 RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174 RBP: ffff88800c181a90 R08: 0000000000000001 R09: ffffed1001307a83 R10: 0000000000000002 R11: ffff88806cf37298 R12: fffffffffffffffc R13: ffff88800983d41c R14: ffffffff85cfbf20 R15: ffff88801b17dbb8 FS: 00007f4e73c40700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a22f5d541 CR3: 0000000013bde000 CR4: 0000000000350ef0 Call Trace: create_new_namespaces+0x585/0x750 copy_namespaces+0x45c/0x580 copy_process+0x26e4/0x72a0 kernel_clone+0xea/0x7f0 __do_sys_clone3+0x1f5/0x280 do_syscall_64+0xbf/0x430 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4e766ebb19 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:00007f4e73c40188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f4e767ff020 RCX: 00007f4e766ebb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240 RBP: 00007f4e76745f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd4072e94f R14: 00007f4e73c40300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- 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:ffff88804a3979f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90008cd0000 RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174 RBP: ffff88800c181a90 R08: 0000000000000001 R09: ffffed1001307a83 R10: 0000000000000002 R11: ffff88806cf37298 R12: fffffffffffffffc R13: ffff88800983d41c R14: ffffffff85cfbf20 R15: ffff88801b17dbb8 FS: 00007f4e73c40700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a22f5d541 CR3: 0000000013bde000 CR4: 0000000000350ef0 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 9p: Bad value for 'rfdno' netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 9p: Bad value for 'cachetag' audit: type=1400 audit(1762992919.131:12): avc: denied { tracepoint } for pid=4847 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 9pnet_fd: p9_fd_create_tcp (4852): problem connecting socket to 127.0.0.1 9p: Bad value for 'cachetag' 9pnet_fd: p9_fd_create_tcp (4858): problem connecting socket to 127.0.0.1 audit: type=1326 audit(1762992919.297:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4867 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f04c9a38b19 code=0x0 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy misc raw-gadget: fail, usb_gadget_register_driver returned -16 ---------------- 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)