loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. 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: 3969 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:ffff88804b23f9f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90009025000 RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174 RBP: ffff88800dc6f340 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8664ca57 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88800d90c41c R14: ffff888013d9c410 R15: ffff888019d20878 FS: 00007f6235c6c700(0000) GS:ffff8880e5397000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000d0e7000 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: 0033:0x7f62386f6b19 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:00007f6235c6c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f6238809f60 RCX: 00007f62386f6b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020005880 RBP: 00007f6238750f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3dcb139f R14: 00007f6235c6c300 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:ffff88804b23f9f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90009025000 RDX: 000000000000002e RSI: ffffffff81447b61 RDI: 0000000000000174 RBP: ffff88800dc6f340 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8664ca57 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88800d90c41c R14: ffff888013d9c410 R15: ffff888019d20878 FS: 00007f6235c6c700(0000) GS:ffff8880e5397000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000d0e7000 CR4: 0000000000350ef0 EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. 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 EXT4-fs (loop3): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 loop5: detected capacity change from 0 to 2048 EXT4-fs: Ignoring removed i_version option EXT4-fs: Ignoring removed nobh option EXT4-fs (loop7): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs error (device loop5): __ext4_fill_super:5513: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop2: detected capacity change from 0 to 512 EXT4-fs (loop5): get root inode failed audit: type=1400 audit(1762973803.209:11): avc: denied { watch_reads } for pid=4022 comm="syz-executor.3" path="/syzkaller-testdir455821506/syzkaller.3p70cK/2/file0" dev="tmpfs" ino=1 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=dir permissive=1 EXT4-fs (loop5): mount failed EXT4-fs warning (device loop2): read_mmp_block:110: Error -117 while reading MMP block 12 loop5: detected capacity change from 0 to 2048 EXT4-fs: Ignoring removed i_version option EXT4-fs: Ignoring removed nobh option 9p: Bad value for 'rfdno' EXT4-fs error (device loop5): __ext4_fill_super:5513: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 loop5: detected capacity change from 0 to 2048 EXT4-fs: Ignoring removed i_version option EXT4-fs: Ignoring removed nobh option EXT4-fs (loop7): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs error (device loop5): __ext4_fill_super:5513: inode #2: comm syz-executor.5: iget: special inode unallocated EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. ---------------- 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)