Oops: general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf] CPU: 1 UID: 0 PID: 5676 Comm: syz-executor.7 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:put_pid_ns+0x30/0x80 Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8 RSP: 0018:ffff88801e8dfdb0 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 0000000000000006 RCX: ffffc90009025000 RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba RBP: ffffffffffffffea R08: 0000000000000001 R09: ffffed1003d1bfa3 R10: 0000000000000000 R11: ffff88801fb8df70 R12: ffff888019a08b60 R13: ffff888019a08d14 R14: ffffffff85cfdf20 R15: ffff8880145e2438 FS: 00007f7638b49700(0000) GS:ffff8880e5494000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f763b6e3000 CR3: 0000000051618000 CR4: 0000000000350ef0 Call Trace: nsproxy_free+0xfa/0x5a0 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: 0033:0x7f763b5d3b19 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:00007f7638b49188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f763b6e6f60 RCX: 00007f763b5d3b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000022060200 RBP: 00007f763b62df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9c7bddef R14: 00007f7638b49300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:put_pid_ns+0x30/0x80 Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8 RSP: 0018:ffff88801e8dfdb0 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 0000000000000006 RCX: ffffc90009025000 RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba RBP: ffffffffffffffea R08: 0000000000000001 R09: ffffed1003d1bfa3 R10: 0000000000000000 R11: ffff88801fb8df70 R12: ffff888019a08b60 R13: ffff888019a08d14 R14: ffffffff85cfdf20 R15: ffff8880145e2438 FS: 00007f7638b49700(0000) GS:ffff8880e5494000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f763b6e3000 CR3: 0000000051618000 CR4: 0000000000350ef0 EXT4-fs error (device loop3): ext4_quota_enable:7132: comm syz-executor.3: Bad quota inum: 768, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7177: Failed to enable quota tracking (type=0, err=-117, ino=768). Please run e2fsck to fix. EXT4-fs (loop3): mount failed Oops: general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#2] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf] CPU: 1 UID: 0 PID: 5690 Comm: syz-executor.7 Tainted: G D 6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary) Tainted: [D]=DIE Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:put_pid_ns+0x30/0x80 Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8 RSP: 0018:ffff8880171d7db0 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 0000000000000007 RCX: ffffc90009c2b000 RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba RBP: ffffffffffffffea R08: 0000000000000001 R09: ffffed1002e3afa3 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888019a08b60 R13: ffff888019a08d14 R14: ffffffff85cfdf20 R15: ffff888049783ff8 FS: 00007f7638b28700(0000) GS:ffff8880e5494000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7638b07718 CR3: 0000000051618000 CR4: 0000000000350ef0 Call Trace: nsproxy_free+0xfa/0x5a0 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: 0033:0x7f763b5d3b19 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:00007f7638b28188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f763b6e7020 RCX: 00007f763b5d3b19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000022060200 RBP: 00007f763b62df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff9c7bddef R14: 00007f7638b28300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:put_pid_ns+0x30/0x80 Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8 RSP: 0018:ffff88801e8dfdb0 EFLAGS: 00010216 RAX: dffffc0000000000 RBX: 0000000000000006 RCX: ffffc90009025000 RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba RBP: ffffffffffffffea R08: 0000000000000001 R09: ffffed1003d1bfa3 R10: 0000000000000000 R11: ffff88801fb8df70 R12: ffff888019a08b60 R13: ffff888019a08d14 R14: ffffffff85cfdf20 R15: ffff8880145e2438 FS: 00007f7638b28700(0000) GS:ffff8880e5494000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7638b07718 CR3: 0000000051618000 CR4: 0000000000350ef0 loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): ext4_quota_enable:7132: comm syz-executor.3: Bad quota inum: 768, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7177: Failed to enable quota tracking (type=0, err=-117, ino=768). Please run e2fsck to fix. EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): ext4_quota_enable:7132: comm syz-executor.3: Bad quota inum: 768, type: 0 EXT4-fs warning (device loop3): ext4_enable_quotas:7177: Failed to enable quota tracking (type=0, err=-117, ino=768). Please run e2fsck to fix. EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 Bluetooth: hci6: unexpected subevent 0x01 length: 30 > 18 Bluetooth: hci6: unexpected subevent 0x01 length: 30 > 18 debugfs: '0' already exists in 'hci6' sysfs: cannot create duplicate filename '/devices/virtual/bluetooth/hci6/hci6:0' CPU: 1 UID: 0 PID: 306 Comm: kworker/u11:3 Tainted: G D 6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary) Tainted: [D]=DIE Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: hci6 hci_rx_work Call Trace: dump_stack_lvl+0xfa/0x120 sysfs_warn_dup+0x80/0xa0 sysfs_create_dir_ns+0x23b/0x2a0 kobject_add_internal+0x24c/0x9a0 kobject_add+0x157/0x240 device_add+0x32d/0x1830 hci_conn_add_sysfs+0x117/0x1c0 le_conn_complete_evt+0x124b/0x1f60 hci_le_conn_complete_evt+0x22a/0x2c0 hci_le_meta_evt+0x34b/0x530 hci_event_packet+0x66c/0x10e0 hci_rx_work+0x96c/0x1270 process_one_work+0x8e1/0x19c0 worker_thread+0x67e/0xe90 kthread+0x3c8/0x740 ret_from_fork+0x67a/0x7a0 ret_from_fork_asm+0x1a/0x30 kobject: kobject_add_internal failed for hci6:0 with -EEXIST, don't try to register things with the same name in the same directory. Bluetooth: hci6: failed to register connection device loop3: detected capacity change from 0 to 512 mac80211_hwsim hwsim6 wlan1: entered promiscuous mode mac80211_hwsim hwsim6 wlan1: left promiscuous mode loop3: detected capacity change from 0 to 512 loop3: detected capacity change from 0 to 512 mac80211_hwsim hwsim6 wlan1: entered promiscuous mode mac80211_hwsim hwsim6 wlan1: left promiscuous mode mac80211_hwsim hwsim7 wlan1: entered promiscuous mode mac80211_hwsim hwsim7 wlan1: left promiscuous mode mac80211_hwsim hwsim6 wlan1: entered promiscuous mode loop3: detected capacity change from 0 to 272 mac80211_hwsim hwsim6 wlan1: left promiscuous mode mac80211_hwsim hwsim7 wlan1: entered promiscuous mode EXT4-fs (loop3): bad geometry: block count 128 exceeds size of device (68 blocks) mac80211_hwsim hwsim7 wlan1: left promiscuous mode mac80211_hwsim hwsim12 wlan1: entered promiscuous mode mac80211_hwsim hwsim12 wlan1: left promiscuous mode loop3: detected capacity change from 0 to 272 mac80211_hwsim hwsim7 wlan1: entered promiscuous mode mac80211_hwsim hwsim7 wlan1: left promiscuous mode EXT4-fs (loop3): bad geometry: block count 128 exceeds size of device (68 blocks) mac80211_hwsim hwsim6 wlan1: entered promiscuous mode mac80211_hwsim hwsim6 wlan1: left promiscuous mode mac80211_hwsim hwsim12 wlan1: entered promiscuous mode mac80211_hwsim hwsim12 wlan1: left promiscuous mode loop3: detected capacity change from 0 to 272 EXT4-fs (loop3): bad geometry: block count 128 exceeds size of device (68 blocks) mac80211_hwsim hwsim12 wlan1: entered promiscuous mode mac80211_hwsim hwsim12 wlan1: left promiscuous mode No source specified No source specified No source specified loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.1'. loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.6'. Bluetooth: hci6: command 0x0c1a tx timeout loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.1'. loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.6'. netlink: 4384 bytes leftover after parsing attributes in process `syz-executor.1'. loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed audit: type=1400 audit(2000000008.635:17): avc: denied { tracepoint } for pid=6061 comm="syz-executor.2" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed syz-executor.1 (6142) used greatest stack depth: 22960 bytes left loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 Bluetooth: hci6: command 0x0c1a tx timeout EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed syz-executor.1 (6165) used greatest stack depth: 22832 bytes left loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 loop5: detected capacity change from 0 to 240 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root isofs_fill_super: root inode is not a directory. Corrupted media? EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop5: detected capacity change from 0 to 240 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root isofs_fill_super: root inode is not a directory. Corrupted media? loop3: detected capacity change from 0 to 512 EXT4-fs (loop3): corrupt root inode, run e2fsck EXT4-fs (loop3): mount failed loop5: detected capacity change from 0 to 240 loop3: detected capacity change from 0 to 512 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root EXT4-fs (loop3): corrupt root inode, run e2fsck isofs_fill_super: root inode is not a directory. Corrupted media? EXT4-fs (loop3): mount failed loop5: detected capacity change from 0 to 240 loop3: detected capacity change from 0 to 512 ISO 9660 Extensions: Microsoft Joliet Level 3 ISOFS: changing to secondary root isofs_fill_super: root inode is not a directory. Corrupted media? EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs error (device loop3): __ext4_fill_super:5513: inode #2: comm syz-executor.3: iget: special inode unallocated EXT4-fs (loop3): get root inode failed EXT4-fs (loop3): mount failed loop3: detected capacity change from 0 to 512 EXT4-fs warning (device loop3): read_mmp_block:110: Error -117 while reading MMP block 12 loop3: detected capacity change from 0 to 512 EXT4-fs warning (device loop3): read_mmp_block:110: Error -117 while reading MMP block 12 loop3: detected capacity change from 0 to 512 EXT4-fs warning (device loop3): read_mmp_block:110: Error -117 while reading MMP block 12 loop3: detected capacity change from 0 to 512 ---------------- Code disassembly (best guess): 0: 89 fd mov %edi,%ebp 2: 53 push %rbx 3: e8 42 a0 03 00 callq 0x3a04a 8: 48 85 ed test %rbp,%rbp b: 74 3d je 0x4a d: e8 38 a0 03 00 callq 0x3a04a 12: 48 8d bd d0 00 00 00 lea 0xd0(%rbp),%rdi 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: 75 35 jne 0x65 30: 48 8b 9d d0 00 00 00 mov 0xd0(%rbp),%rbx 37: bf 08 00 00 00 mov $0x8,%edi 3c: 48 89 de mov %rbx,%rsi 3f: e8 .byte 0xe8