netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. syz-executor.0 uses obsolete (PF_INET,SOCK_PACKET) loop6: detected capacity change from 0 to 8 loop6: detected capacity change from 0 to 8 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: 3960 Comm: syz-executor.4 Not tainted 6.18.0-rc5-next-20251114 #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 7f 56 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:ffff88801b9d7dc8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc900044ac000 RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174 RBP: ffff88800974fd68 R08: 0000000000000001 R09: ffffed10037f8843 R10: 0000000000000003 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88801bfc421c R14: ffffffff85cfdf20 R15: ffff888016bd0878 FS: 00007f2efaccf700(0000) GS:ffff8880e548f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0d18e4718 CR3: 0000000016f4c000 CR4: 0000000000350ef0 Call Trace: create_new_namespaces+0x585/0x750 unshare_nsproxy_namespaces+0xc0/0x200 ksys_unshare+0x468/0xa10 __x64_sys_unshare+0x31/0x40 do_syscall_64+0xbf/0x430 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2efd759b19 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:00007f2efaccf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f2efd86cf60 RCX: 00007f2efd759b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000044000200 RBP: 00007f2efd7b3f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffebdf519af R14: 00007f2efaccf300 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 7f 56 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:ffff88801b9d7dc8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000003 RCX: ffffc900044ac000 RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174 RBP: ffff88800974fd68 R08: 0000000000000001 R09: ffffed10037f8843 R10: 0000000000000003 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88801bfc421c R14: ffffffff85cfdf20 R15: ffff888016bd0878 FS: 00007f2efaccf700(0000) GS:ffff8880e548f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0d18e4718 CR3: 0000000016f4c000 CR4: 0000000000350ef0 Bluetooth: hci7: command 0x0c1a tx timeout Bluetooth: hci6: command 0x0c1a tx timeout Bluetooth: hci5: command 0x0c1a tx timeout Bluetooth: hci4: command 0x0c1a tx timeout Bluetooth: hci3: command 0x0c1a tx timeout Bluetooth: hci2: command 0x0c1a tx timeout Bluetooth: hci0: command 0x0c1a tx timeout Bluetooth: hci1: command 0x0c1a tx timeout loop1: detected capacity change from 0 to 512 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.7'. EXT4-fs (loop1): mounting ext2 file system using the ext4 subsystem EXT4-fs error (device loop1): __ext4_fill_super:5513: inode #2: comm syz-executor.1: iget: special inode unallocated EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounting ext2 file system using the ext4 subsystem EXT4-fs error (device loop1): __ext4_fill_super:5513: inode #2: comm syz-executor.1: iget: special inode unallocated EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed 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 loop1: detected capacity change from 0 to 640 ext4: Unknown parameter '˙˙' loop1: detected capacity change from 0 to 640 ext4: Unknown parameter '˙˙aps_rollup' mac80211_hwsim hwsim13 wlan1: entered promiscuous mode mac80211_hwsim hwsim13 wlan1: left promiscuous mode mac80211_hwsim hwsim13 wlan1: entered promiscuous mode mac80211_hwsim hwsim13 wlan1: left promiscuous mode 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 syz-executor.5 (4007) used greatest stack depth: 24432 bytes left ---------------- 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 7f 56 30 00 rex.XB callq 0x305690 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)