------------[ cut here ]------------ WARNING: fs/namespace.c:1375 at cleanup_mnt+0x33f/0x430, CPU#1: syz-executor.0/33022 Modules linked in: CPU: 1 UID: 0 PID: 33022 Comm: syz-executor.0 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:cleanup_mnt+0x33f/0x430 Code: c7 a0 45 d1 85 e8 01 7c fa 02 49 8d 7d 40 5b 48 c7 c6 10 e2 be 81 5d 41 5c 41 5d 41 5e 41 5f e9 57 b3 9c ff e8 82 46 b4 ff 90 <0f> 0b 90 e9 e6 fc ff ff e8 74 46 b4 ff 4c 89 ef e8 6c d7 06 00 e9 RSP: 0018:ffff888048c27af8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81bf9de5 RDX: ffff8880475c1b80 RSI: ffffffff81bfa0fe RDI: 0000000000000005 RBP: ffff88801f350740 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000001 R11: ffff88801d32b030 R12: ffff8880475c2458 R13: ffff88801f350540 R14: 0000000000000001 R15: ffff88801f350580 FS: 0000000000000000(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8520398718 CR3: 000000003f433000 CR4: 0000000000350ef0 Call Trace: task_work_run+0x172/0x280 do_exit+0x846/0x2970 do_group_exit+0xd3/0x2a0 get_signal+0x2315/0x2340 arch_do_signal_or_restart+0x80/0x790 irqentry_exit_to_user_mode+0x106/0x1c0 exc_page_fault+0xd9/0x180 asm_exc_page_fault+0x26/0x30 RIP: 0033:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 002b:000000002000021c EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f8522f56f60 RCX: 00007f8522e43b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240 RBP: 00007f8522e9df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff03ce165f R14: 00007f85203b9300 R15: 0000000000022000 irq event stamp: 1159 hardirqs last enabled at (1167): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (1176): [] __up_console_sem+0x5d/0x80 softirqs last enabled at (1000): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (995): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- kmemleak: Found object by alias at 0x607f1a639f28 CPU: 1 UID: 0 PID: 4013 Comm: syz-executor.6 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 __lookup_object+0x94/0xb0 delete_object_full+0x27/0x70 free_percpu+0x30/0x1160 futex_hash_free+0x38/0xc0 mmput+0x2d3/0x390 do_exit+0x79d/0x2970 do_group_exit+0xd3/0x2a0 get_signal+0x2315/0x2340 arch_do_signal_or_restart+0x80/0x790 exit_to_user_mode_loop+0x8b/0x110 do_syscall_64+0x2f7/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc657467b19 Code: Unable to access opcode bytes at 0x7fc657467aef. RSP: 002b:00007fc6549dd218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007fc65757af68 RCX: 00007fc657467b19 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc65757af68 RBP: 00007fc65757af60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc65757af6c R13: 00007fff33db29df R14: 00007fc6549dd300 R15: 0000000000022000 kmemleak: Object (percpu) 0x607f1a639f24 (size 8): kmemleak: comm "syz-executor.0", pid 4019, jiffies 4294789343 kmemleak: min_count = 1 kmemleak: count = 0 kmemleak: flags = 0x21 kmemleak: checksum = 0 kmemleak: backtrace: pcpu_alloc_noprof+0x87a/0x1170 alloc_vfsmnt+0x135/0x6e0 clone_mnt+0x6c/0xb70 copy_tree+0x34b/0xaf0 copy_mnt_ns+0x1ab/0xab0 create_new_namespaces+0xd6/0xab0 copy_namespaces+0x45c/0x580 copy_process+0x2649/0x73c0 kernel_clone+0xea/0x7f0 __do_sys_clone3+0x1f5/0x280 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f ------------[ cut here ]------------ WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.0/33022 Modules linked in: CPU: 0 UID: 0 PID: 33022 Comm: syz-executor.0 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:mntput_no_expire+0x78e/0xbe0 Code: 05 16 42 81 04 01 e8 31 f8 91 ff e9 41 fc ff ff e8 b7 50 b4 ff 31 ff 44 89 ee e8 dd 4b b4 ff 45 85 ed 79 09 e8 a3 50 b4 ff 90 <0f> 0b 90 e8 9a 50 b4 ff e8 75 f6 fb 02 31 ff 89 c5 89 c6 e8 ba 4b RSP: 0018:ffff88804829f9b8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff11009053f3c RCX: ffffffff81bf96d3 RDX: ffff8880482c0000 RSI: ffffffff81bf96dd RDI: 0000000000000005 RBP: ffff88800dfd3500 R08: 0000000000000001 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88804829fa20 R13: 00000000ffffffff R14: dead000000000100 R15: ffff88800dfd3500 FS: 0000000000000000(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f045d9ff098 CR3: 00000000465fa000 CR4: 0000000000350ef0 Call Trace: namespace_unlock+0x7f1/0x810 put_mnt_ns+0xf5/0x120 free_nsproxy+0x3a/0x400 switch_task_namespaces+0xe2/0x100 do_exit+0x841/0x2970 do_group_exit+0xd3/0x2a0 get_signal+0x2315/0x2340 arch_do_signal_or_restart+0x80/0x790 irqentry_exit_to_user_mode+0x106/0x1c0 exc_page_fault+0xd9/0x180 asm_exc_page_fault+0x26/0x30 RIP: 0033:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 002b:000000002000021c EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007f8522f56f60 RCX: 00007f8522e43b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240 RBP: 00007f8522e9df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff03ce165f R14: 00007f85203b9300 R15: 0000000000022000 irq event stamp: 1037 hardirqs last enabled at (1047): [] __up_console_sem+0x78/0x80 hardirqs last disabled at (1054): [] __up_console_sem+0x5d/0x80 softirqs last enabled at (696): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (691): [] __irq_exit_rcu+0xc4/0x100 ---[ end trace 0000000000000000 ]--- kmemleak: Found object by alias at 0x607f1a639f28 CPU: 0 UID: 0 PID: 4078 Comm: syz-executor.6 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 __lookup_object+0x94/0xb0 delete_object_full+0x27/0x70 free_percpu+0x30/0x1160 futex_hash_free+0x38/0xc0 mmput+0x2d3/0x390 do_exit+0x79d/0x2970 do_group_exit+0xd3/0x2a0 __x64_sys_exit_group+0x3e/0x50 x64_sys_call+0x18c5/0x18d0 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc657467b19 Code: Unable to access opcode bytes at 0x7fc657467aef. RSP: 002b:00007fff33db2c08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007fc657467b19 RDX: 00007fc65741a72b RSI: ffffffffffffffbc RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000001b2d422df8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007fff33db2cf0 kmemleak: Object (percpu) 0x607f1a639f24 (size 8): kmemleak: comm "syz-executor.0", pid 4084, jiffies 4294789903 kmemleak: min_count = 1 kmemleak: count = 0 kmemleak: flags = 0x21 kmemleak: checksum = 0 kmemleak: backtrace: pcpu_alloc_noprof+0x87a/0x1170 alloc_vfsmnt+0x135/0x6e0 clone_mnt+0x6c/0xb70 copy_tree+0x34b/0xaf0 copy_mnt_ns+0x1ab/0xab0 create_new_namespaces+0xd6/0xab0 copy_namespaces+0x45c/0x580 copy_process+0x2649/0x73c0 kernel_clone+0xea/0x7f0 __do_sys_clone3+0x1f5/0x280 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f EXT4-fs warning (device sda): ext4_group_extend:1862: can't shrink FS - resize aborted EXT4-fs warning (device sda): ext4_group_extend:1862: can't shrink FS - resize aborted EXT4-fs warning (device sda): ext4_group_extend:1862: can't shrink FS - resize aborted netlink: 24 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.7'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.7'. EXT4-fs warning (device sda): ext4_group_extend:1862: can't shrink FS - resize aborted netlink: 24 bytes leftover after parsing attributes in process `syz-executor.7'. EXT4-fs warning (device sda): ext4_group_extend:1862: can't shrink FS - resize aborted netlink: 24 bytes leftover after parsing attributes in process `syz-executor.7'. EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 21 (only 16 groups) I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 FAT-fs (loop0): unable to read boot sector I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 FAT-fs (loop0): unable to read boot sector EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 21 (only 16 groups) I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 FAT-fs (loop0): unable to read boot sector I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 FAT-fs (loop0): unable to read boot sector EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 21 (only 16 groups) I/O error, dev loop0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2 FAT-fs (loop0): unable to read boot sector EXT4-fs warning (device sda): verify_group_input:136: Cannot add at group 21 (only 16 groups) loop3: detected capacity change from 0 to 240 isofs_fill_super: root inode is not a directory. Corrupted media? loop3: detected capacity change from 0 to 240 isofs_fill_super: root inode is not a directory. Corrupted media? loop3: detected capacity change from 0 to 240 isofs_fill_super: root inode is not a directory. Corrupted media? loop3: detected capacity change from 0 to 240 isofs_fill_super: root inode is not a directory. Corrupted media? SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65380 sclass=netlink_xfrm_socket pid=39 comm=kworker/1:1 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65380 sclass=netlink_xfrm_socket pid=125 comm=kworker/1:2 loop3: detected capacity change from 0 to 240 isofs_fill_super: root inode is not a directory. Corrupted media? SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65380 sclass=netlink_xfrm_socket pid=125 comm=kworker/1:2 syz-executor.0 (4393) used greatest stack depth: 23408 bytes left SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65380 sclass=netlink_xfrm_socket pid=58 comm=kworker/0:2 random: crng reseeded on system resumption random: crng reseeded on system resumption SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65380 sclass=netlink_xfrm_socket pid=58 comm=kworker/0:2 loop6: detected capacity change from 0 to 276 kmemleak: Found object by alias at 0x607f1a6399f0 CPU: 1 UID: 0 PID: 4545 Comm: syz-executor.3 Tainted: G W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) Tainted: [W]=WARN Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0xca/0x120 __lookup_object+0x94/0xb0 delete_object_full+0x27/0x70 free_percpu+0x30/0x1160 futex_hash_free+0x38/0xc0 mmput+0x2d3/0x390 do_exit+0x79d/0x2970 do_group_exit+0xd3/0x2a0 __x64_sys_exit_group+0x3e/0x50 x64_sys_call+0x18c5/0x18d0 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4ba2e36b19 Code: Unable to access opcode bytes at 0x7f4ba2e36aef. RSP: 002b:00007ffc21c6cfa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f4ba2e36b19 RDX: 00007f4ba2de972b RSI: ffffffffffffffbc RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000001b2d022084 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc21c6d090 kmemleak: Object (percpu) 0x607f1a6399ec (size 8): kmemleak: comm "syz-executor.2", pid 4554, jiffies 4294794668 kmemleak: min_count = 1 kmemleak: count = 0 kmemleak: flags = 0x21 kmemleak: checksum = 0 kmemleak: backtrace: pcpu_alloc_noprof+0x87a/0x1170 alloc_vfsmnt+0x135/0x6e0 vfs_create_mount.part.0+0x40/0x440 path_mount+0x1637/0x1dd0 __x64_sys_mount+0x27b/0x300 do_syscall_64+0xbf/0x360 entry_SYSCALL_64_after_hwframe+0x77/0x7f audit: type=1400 audit(1756473971.871:10): avc: denied { ingress } for pid=252 comm="syz-fuzzer" saddr=127.0.0.1 src=44114 daddr=127.0.0.1 dest=43077 netif=lo scontext=system_u:object_r:bin_t:s0 tcontext=system_u:object_r:netif_t:s0 tclass=netif permissive=1 audit: type=1400 audit(1756473971.872:11): avc: denied { recvfrom } for pid=252 comm="syz-fuzzer" saddr=127.0.0.1 src=44114 daddr=127.0.0.1 dest=43077 netif=lo scontext=system_u:object_r:bin_t:s0 tcontext=system_u:object_r:node_t:s0 tclass=node permissive=1 audit: type=1400 audit(1756473971.872:12): avc: denied { recv } for pid=252 comm="syz-fuzzer" saddr=127.0.0.1 src=44114 daddr=127.0.0.1 dest=43077 netif=lo scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:bin_t:s0 tclass=peer permissive=1 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 sr 1:0:0:0: [sr0] CDROM not ready. Make sure there is a disc in the drive. 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 process 'syz-executor.0' launched './file1' with NULL argv: empty string added loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. netlink: 20 bytes leftover after parsing attributes in process `syz-executor.7'. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. loop5: detected capacity change from 0 to 512 EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. random: crng reseeded on system resumption loop5: detected capacity change from 0 to 512 random: crng reseeded on system resumption EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. audit: type=1400 audit(1756473974.023:13): avc: denied { read } for pid=4851 comm="syz-executor.3" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000. audit: type=1400 audit(1756473974.179:14): avc: denied { write } for pid=4858 comm="syz-executor.1" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 audit: type=1400 audit(1756473975.187:15): avc: denied { block_suspend } for pid=4972 comm="syz-executor.5" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1