------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x33f/0x3d0, CPU#0: syz-executor.2/4870
Modules linked in:
CPU: 0 UID: 0 PID: 4870 Comm: syz-executor.2 Not tainted 6.18.0-rc4-next-20251107 #1 PREEMPT(voluntary)
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_ns_active_get+0x33f/0x3d0
Code: ab ff 90 0f 0b 90 eb ee e8 3e 24 ab ff 90 0f 0b 90 e9 3f fd ff ff e8 30 24 ab ff 90 0f 0b 90 e9 92 fd ff ff e8 22 24 ab ff 90 <0f> 0b 90 e9 e5 fd ff ff e8 14 24 ab ff 90 0f 0b 90 e9 38 fe ff ff
RSP: 0018:ffff8880168a7e08 EFLAGS: 00010216
RAX: 0000000000000d07 RBX: ffff88800f64b9c0 RCX: ffffc90005bdb000
RDX: 0000000000040000 RSI: ffffffff81c9ab0e RDI: 0000000000000001
RBP: ffff8880165ec001 R08: 0000000000000001 R09: ffffed1002cbd941
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800c009a40
R13: 0000000000000000 R14: ffff888018d6d340 R15: ffff8880168a7e98
FS: 00007f9aaf3c1700(0000) GS:ffff8880e5398000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3b30d3f718 CR3: 0000000015fc6000 CR4: 0000000000350ef0
Call Trace:
switch_task_namespaces+0x3d/0x110
__do_sys_setns+0x6b0/0x19a0
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ab1e4d107
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 34 01 00 00 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:00007f9aaf3c1128 EFLAGS: 00000246 ORIG_RAX: 0000000000000134
RAX: ffffffffffffffda RBX: 00007f9ab1f5ef60 RCX: 00007f9ab1e4d107
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ef
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffccaf92c4f R14: 00007f9aaf3c1300 R15: 0000000000022000
irq event stamp: 883
hardirqs last enabled at (893): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (902): [] __up_console_sem+0x5d/0x80
misc raw-gadget: fail, usb_gadget_register_driver returned -16
softirqs last enabled at (618): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (923): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x35b/0x3d0, CPU#0: syz-executor.2/4870
Modules linked in:
CPU: 0 UID: 0 PID: 4870 Comm: syz-executor.2 Tainted: G W 6.18.0-rc4-next-20251107 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_ns_active_get+0x35b/0x3d0
Code: 0f 0b 90 e9 92 fd ff ff e8 22 24 ab ff 90 0f 0b 90 e9 e5 fd ff ff e8 14 24 ab ff 90 0f 0b 90 e9 38 fe ff ff e8 06 24 ab ff 90 <0f> 0b 90 e9 8b fe ff ff e8 f8 23 ab ff 90 0f 0b 90 e9 de fe ff ff
RSP: 0018:ffff8880168a7e08 EFLAGS: 00010216
RAX: 000000000001fa2c RBX: ffff88800f64b9c0 RCX: ffffc90005bdb000
RDX: 0000000000040000 RSI: ffffffff81c9ab2a RDI: 0000000000000001
RBP: ffff88801be48c01 R08: 0000000000000001 R09: ffffed10037c9197
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800c009a40
R13: 0000000000000000 R14: ffff888018d6d340 R15: ffff8880168a7e98
FS: 00007f9aaf3c1700(0000) GS:ffff8880e5398000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3b30d3f718 CR3: 0000000015fc6000 CR4: 0000000000350ef0
Call Trace:
switch_task_namespaces+0x3d/0x110
__do_sys_setns+0x6b0/0x19a0
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ab1e4d107
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 34 01 00 00 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:00007f9aaf3c1128 EFLAGS: 00000246 ORIG_RAX: 0000000000000134
RAX: ffffffffffffffda RBX: 00007f9ab1f5ef60 RCX: 00007f9ab1e4d107
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ef
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffccaf92c4f R14: 00007f9aaf3c1300 R15: 0000000000022000
irq event stamp: 1655
hardirqs last enabled at (1663): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (1672): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (1296): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (1127): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x369/0x3d0, CPU#0: syz-executor.2/4870
Modules linked in:
CPU: 0 UID: 0 PID: 4870 Comm: syz-executor.2 Tainted: G W 6.18.0-rc4-next-20251107 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_ns_active_get+0x369/0x3d0
Code: 0f 0b 90 e9 e5 fd ff ff e8 14 24 ab ff 90 0f 0b 90 e9 38 fe ff ff e8 06 24 ab ff 90 0f 0b 90 e9 8b fe ff ff e8 f8 23 ab ff 90 <0f> 0b 90 e9 de fe ff ff e8 ea 23 ab ff 90 0f 0b 90 e9 31 ff ff ff
RSP: 0018:ffff8880168a7e08 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88800f64b208 RCX: ffffc90005bdb000
RDX: 0000000000040000 RSI: ffffffff81c9ab38 RDI: 0000000000000001
RBP: ffff888048058001 R08: 0000000000000001 R09: ffffed100900b042
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800ca301c0
R13: 0000000000000000 R14: ffff888018d6d340 R15: ffff8880168a7e98
FS: 00007f9aaf3c1700(0000) GS:ffff8880e5398000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d427000 CR3: 0000000015fc6000 CR4: 0000000000350ef0
Call Trace:
switch_task_namespaces+0x3d/0x110
__do_sys_setns+0x6b0/0x19a0
do_syscall_64+0xbf/0x430
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ab1e4d107
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 34 01 00 00 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:00007f9aaf3c1128 EFLAGS: 00000246 ORIG_RAX: 0000000000000134
RAX: ffffffffffffffda RBX: 000000000000000d RCX: 00007f9ab1e4d107
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9aaf3c16bc
R13: 000000000000000e R14: 00007f9aaf3c1300 R15: 0000000000022000
irq event stamp: 2581
hardirqs last enabled at (2591): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (2600): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (2360): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (2197): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
Zero length message leads to an empty skb