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: 4912 Comm: syz-executor.6 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:ffff888048b679f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000007 RCX: ffffc90002e20000 RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174 RBP: ffff88801e020548 R08: 0000000000000001 R09: ffffed1002c79583 R10: 0000000000000007 R11: ffff88806cf37498 R12: fffffffffffffffc R13: ffff8880163cac1c R14: ffffffff85cfdf20 R15: ffff888047fb2438 FS: 00007fa86e01a700(0000) GS:ffff8880e548f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555674b6c58 CR3: 000000000bc16000 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: 0033:0x7fa870aa4b19 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:00007fa86e01a188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007fa870bb7f60 RCX: 00007fa870aa4b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240 RBP: 00007fa870afef6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdba47cadf R14: 00007fa86e01a300 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:ffff888048b679f8 EFLAGS: 00010217 RAX: dffffc0000000000 RBX: 0000000000000007 RCX: ffffc90002e20000 RDX: 000000000000002e RSI: ffffffff8144dd61 RDI: 0000000000000174 RBP: ffff88801e020548 R08: 0000000000000001 R09: ffffed1002c79583 R10: 0000000000000007 R11: ffff88806cf37498 R12: fffffffffffffffc R13: ffff8880163cac1c R14: ffffffff85cfdf20 R15: ffff888047fb2438 FS: 00007fa86e01a700(0000) GS:ffff8880e548f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555674b6c58 CR3: 000000000bc16000 CR4: 0000000000350ef0 loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/66/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/66/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/67/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/68/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 loop1: detected capacity change from 0 to 512 loop2: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir910179697/syzkaller.Acd2lc/64/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir894161436/syzkaller.a7yc2h/63/file0 supports timestamps until 2038-01-19 (0x7fffffff) ext4 filesystem being mounted at /syzkaller-testdir316486982/syzkaller.KqbjEP/62/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/69/file0 supports timestamps until 2038-01-19 (0x7fffffff) loop2: detected capacity change from 0 to 512 EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir894161436/syzkaller.a7yc2h/64/file0 supports timestamps until 2038-01-19 (0x7fffffff) loop0: detected capacity change from 0 to 512 EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir910179697/syzkaller.Acd2lc/65/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir316486982/syzkaller.KqbjEP/63/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop0: detected capacity change from 0 to 512 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir910179697/syzkaller.Acd2lc/66/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 512 loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir316486982/syzkaller.KqbjEP/64/file0 supports timestamps until 2038-01-19 (0x7fffffff) loop2: detected capacity change from 0 to 512 ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/70/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000. EXT4-fs (loop2): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir894161436/syzkaller.a7yc2h/65/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop2): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 loop1: detected capacity change from 0 to 264192 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: unexpected EA_INODE flag EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/71/file0 supports timestamps until 2038-01-19 (0x7fffffff) loop1: detected capacity change from 0 to 264192 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: unexpected EA_INODE flag EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop7: detected capacity change from 0 to 512 EXT4-fs (loop7): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ext4 filesystem being mounted at /syzkaller-testdir532867239/syzkaller.VIRgv5/72/file0 supports timestamps until 2038-01-19 (0x7fffffff) EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop1: detected capacity change from 0 to 264192 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: unexpected EA_INODE flag EXT4-fs (loop1): get root inode failed EXT4-fs (loop1): mount failed audit: type=1326 audit(1763108158.555:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5318 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7efdfec36b19 code=0x0 audit: type=1326 audit(1763108159.460:11): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5329 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7efdfec36b19 code=0x0 audit: type=1326 audit(1763108159.573:12): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5347 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa870aa4b19 code=0x0 audit: type=1326 audit(1763108160.318:13): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5375 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f331528db19 code=0x0 audit: type=1326 audit(1763108160.377:14): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5385 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7efdfec36b19 code=0x0 audit: type=1326 audit(1763108161.227:15): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5389 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f331528db19 code=0x0 audit: type=1326 audit(1763108161.263:16): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5394 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa870aa4b19 code=0x0 audit: type=1326 audit(1763108161.263:17): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5392 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7efdfec36b19 code=0x0 process 'syz-executor.1' launched './file1' with NULL argv: empty string added audit: type=1326 audit(1763108162.452:18): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5429 comm="syz-executor.6" exe="/syz-executor.6" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7fa870aa4b19 code=0x0 audit: type=1326 audit(1763108162.470:19): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5434 comm="syz-executor.0" exe="/syz-executor.0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f331528db19 code=0x0 capability: warning: `syz-executor.4' uses 32-bit capabilities (legacy support in use) netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 1000 bytes leftover after parsing attributes in process `syz-executor.0'. isofs_fill_super: bread failed, dev=loop4, iso_blknum=16, block=32 audit: type=1326 audit(1763108164.472:20): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5622 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f71b0c36b19 code=0x0 isofs_fill_super: bread failed, dev=loop4, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop5, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop4, iso_blknum=16, block=32 audit: type=1326 audit(1763108164.633:21): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5656 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f71b0c36b19 code=0x0 isofs_fill_super: bread failed, dev=loop5, iso_blknum=16, block=32 audit: type=1326 audit(1763108164.760:22): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=5664 comm="syz-executor.7" exe="/syz-executor.7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f71b0c36b19 code=0x0 isofs_fill_super: bread failed, dev=loop5, iso_blknum=16, block=32 isofs_fill_super: bread failed, dev=loop4, iso_blknum=16, block=32 ---------------- 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)