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: 114335 Comm: syz-executor.3 Not tainted 6.18.0-rc5-next-20251113 #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:ffff8880346479f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc9001231b000 RDX: 000000000000002e RSI: ffffffff8144cb61 RDI: 0000000000000174 RBP: ffff88801e0462d8 R08: 0000000000000001 R09: ffffed10026cf203 R10: 0000000000000003 R11: ffff88806ce37498 R12: fffffffffffffffc R13: ffff88801367901c R14: ffffffff85cfdf20 R15: ffff88805f155bb8 FS: 00007f28dd49c700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe559dfd08 CR3: 000000003298d000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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: 0033:0x7f28dff47b19 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:00007f28dd49c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f28e005b020 RCX: 00007f28dff47b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000000 RBP: 00007f28dffa1f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf46f675f R14: 00007f28dd49c300 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:ffff8880346479f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc9001231b000 RDX: 000000000000002e RSI: ffffffff8144cb61 RDI: 0000000000000174 RBP: ffff88801e0462d8 R08: 0000000000000001 R09: ffffed10026cf203 R10: 0000000000000003 R11: ffff88806ce37498 R12: fffffffffffffffc R13: ffff88801367901c R14: ffffffff85cfdf20 R15: ffff88805f155bb8 FS: 00007f28dd49c700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe559dfd08 CR3: 000000003298d000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Buffer I/O error on dev sr0, logical block 0, lost async page write Buffer I/O error on dev sr0, logical block 0, lost async page write No source specified No source specified netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor.5'. audit: type=1400 audit(2000000024.014:93): avc: denied { map } for pid=117527 comm="syz-executor.4" path="pipe:[61689]" dev="pipefs" ino=61689 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=fifo_file permissive=1 cgroup: fork rejected by pids controller in /syz6 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. scsi_io_completion_action: 7 callbacks suppressed sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s sr 1:0:0:0: [sr0] tag#0 Sense Key : Illegal Request [current] sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 00 00 00 00 00 02 00 blk_print_req_error: 7 callbacks suppressed critical target error, dev sr0, sector 0 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 2 buffer_io_error: 5 callbacks suppressed Buffer I/O error on dev sr0, logical block 0, lost async page write Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. tmpfs: Bad value for 'mpol' tmpfs: Bad value for 'mpol' netlink: 'syz-executor.5': attribute type 29 has an invalid length. netlink: 'syz-executor.5': attribute type 29 has an invalid length. netlink: 'syz-executor.5': attribute type 29 has an invalid length. netlink: 'syz-executor.5': attribute type 29 has an invalid length. No source specified No source specified ---------------- 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)