capability: warning: `syz-executor.0' uses deprecated v2 capabilities in a way that may be insecure 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: 4030 Comm: syz-executor.6 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:ffff888048d0f9f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90008e44000 RDX: 000000000000002e RSI: ffffffff8144cb61 RDI: 0000000000000174 RBP: ffff88800d38d410 R08: 0000000000000001 R09: ffffed1003d32a43 R10: 0000000000000002 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88801e99521c R14: ffffffff85cfdf20 R15: ffff888017512438 FS: 00007fb330eb1700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020bb5000 CR3: 000000000d517000 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: 0033:0x7fb33395cb19 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:00007fb330eb1188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fb333a70020 RCX: 00007fb33395cb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240 RBP: 00007fb3339b6f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcfbba282f R14: 00007fb330eb1300 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:ffff888048d0f9f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90008e44000 RDX: 000000000000002e RSI: ffffffff8144cb61 RDI: 0000000000000174 RBP: ffff88800d38d410 R08: 0000000000000001 R09: ffffed1003d32a43 R10: 0000000000000002 R11: 0000000000000001 R12: fffffffffffffffc R13: ffff88801e99521c R14: ffffffff85cfdf20 R15: ffff888017512438 FS: 00007fb330eb1700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020bb5000 CR3: 000000000d517000 CR4: 0000000000350ef0 syz-executor.3 (4008) used greatest stack depth: 23368 bytes left loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounting ext2 file system using the ext4 subsystem EXT4-fs error (device loop5): __ext4_fill_super:5513: inode #2: comm syz-executor.5: iget: bogus i_mode (166400) EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed audit: type=1326 audit(1763061784.834:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4060 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa3d446cb19 code=0x0 loop6: detected capacity change from 0 to 264192 ext4: Bad value for 'min_batch_time' loop5: detected capacity change from 0 to 512 loop6: detected capacity change from 0 to 264192 EXT4-fs (loop5): mounting ext2 file system using the ext4 subsystem ext4: Bad value for 'min_batch_time' EXT4-fs error (device loop5): __ext4_fill_super:5513: inode #2: comm syz-executor.5: iget: bogus i_mode (166400) EXT4-fs (loop5): get root inode failed EXT4-fs (loop5): mount failed loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounting ext2 file system using the ext4 subsystem EXT4-fs (loop0): warning: mounting unchecked fs, running e2fsck is recommended EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop6: detected capacity change from 0 to 264192 EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. ext4: Bad value for 'min_batch_time' loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounting ext2 file system using the ext4 subsystem workqueue: Failed to create a rescuer kthread for wq "ext4-rsv-conversion": -EINTR EXT4-fs: failed to create workqueue EXT4-fs (loop0): mount failed loop6: detected capacity change from 0 to 264192 ext4: Bad value for 'min_batch_time' audit: type=1326 audit(1763061785.656:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4060 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa3d446cb19 code=0x0 ---------------- 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)