ksys_unshare+0x468/0xa10
__x64_sys_unshare+0x31/0x40
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.3/4070
Modules linked in:
CPU: 0 UID: 0 PID: 4070 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
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:ffff8880470ff9c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11008e1ff3d RCX: ffffffff81bf96d3
RDX: ffff88800dd79b80 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff888015f37a40 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff8880470ffa28
R13: 00000000ffffffff R14: dead000000000100 R15: ffff888015f37a40
FS: 0000000000000000(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055baf6953d40 CR3: 000000001eb70000 CR4: 0000000000350ef0
Call Trace:
namespace_unlock+0x57d/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
exit_to_user_mode_loop+0x8b/0x110
do_syscall_64+0x2f7/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0042f35b19
Code: Unable to access opcode bytes at 0x7f0042f35aef.
RSP: 002b:00007f00404ab188 EFLAGS: 00000246 ORIG_RAX: 00000000000000dc
RAX: fffffffffffffffc RBX: 00007f0043048f60 RCX: 00007f0042f35b19
RDX: 0000000000000002 RSI: 0000000020000100 RDI: 0000000000000001
RBP: 00007f0042f8ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc68f6a5ef R14: 00007f00404ab300 R15: 0000000000022000
irq event stamp: 2643
hardirqs last enabled at (2653): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (2662): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (2502): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (2497): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.3/4070
Modules linked in:
CPU: 0 UID: 0 PID: 4070 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
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:ffff8880470ff9c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11008e1ff3d RCX: ffffffff81bf96d3
RDX: ffff88800dd79b80 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff8880146eafc0 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000fffffffe R11: 0000000000000001 R12: ffff8880470ffa28
R13: 00000000fffffffe R14: dead000000000100 R15: ffff8880146eafc0
FS: 0000000000000000(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055baf6953d40 CR3: 0000000005a88000 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
exit_to_user_mode_loop+0x8b/0x110
do_syscall_64+0x2f7/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0042f35b19
Code: Unable to access opcode bytes at 0x7f0042f35aef.
RSP: 002b:00007f00404ab188 EFLAGS: 00000246 ORIG_RAX: 00000000000000dc
RAX: fffffffffffffffc RBX: 00007f0043048f60 RCX: 00007f0042f35b19
RDX: 0000000000000002 RSI: 0000000020000100 RDI: 0000000000000001
RBP: 00007f0042f8ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc68f6a5ef R14: 00007f00404ab300 R15: 0000000000022000
irq event stamp: 4243
hardirqs last enabled at (4253): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (4262): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (3932): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (3923): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
loop2: detected capacity change from 0 to 736
iso9660: Unknown parameter 'm'
loop4: detected capacity change from 0 to 640
loop0: detected capacity change from 0 to 2048
ext4: Unknown parameter 'ÝÊunÿ'
loop0: detected capacity change from 0 to 2048
ext4: Unknown parameter 'ÝÊunÿ'
Quota error (device loop4): v2_read_file_info: Number of blocks too big for quota file size (3655866691584 > 6144).
EXT4-fs warning (device loop4): ext4_enable_quotas:7174: Failed to enable quota tracking (type=0, err=-117, ino=3). Please run e2fsck to fix.
EXT4-fs (loop4): mount failed
loop5: detected capacity change from 0 to 4096
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
audit: type=1326 audit(1756579705.226:10): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=4127 comm="syz-executor.2" exe="/syz-executor.2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f09c9446b19 code=0x0
EXT4-fs (loop5): unmounting filesystem 00000000-0000-0000-0000-000000000000.
loop4: detected capacity change from 0 to 640
FAULT_INJECTION: forcing a failure.
name fail_futex, interval 1, probability 0, space 0, times 1
CPU: 1 UID: 0 PID: 4145 Comm: syz-executor.1 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+0xfa/0x120
should_fail_ex+0x4d7/0x5e0
get_futex_key+0x1c5/0x14a0
futex_requeue+0x251/0x2060
do_futex+0x29b/0x370
__x64_sys_futex+0x1c9/0x4d0
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f932c9a3b19
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:00007f9329f19188 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f932cab6f60 RCX: 00007f932c9a3b19
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 00007f9329f191d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc646cff6f R14: 00007f9329f19300 R15: 0000000000022000
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000032: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197]
CPU: 0 UID: 0 PID: 4122 Comm: systemd-udevd 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:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff8880161fef80 EFLAGS: 00010012
RAX: 0000000000000032 RBX: ffffffffffffffa1 RCX: 0000000000000002
RDX: ffff8880474f9b80 RSI: ffffffff818995b7 RDI: 0000000000000191
RBP: ffff8880161ff1f0 R08: ffff88806ce31340 R09: ffffe8ffffc15e18
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007f7ab3ece8c0(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29914d6fe8 CR3: 0000000009e12000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_preemptirq_template+0x259/0x430
trace_irq_enable.constprop.0+0xa6/0x100
trace_hardirqs_on+0x26/0x40
ktime_get+0x1c7/0x270
submit_bio_noacct_nocheck+0x41a/0xcb0
submit_bio_noacct+0x359/0x1350
mpage_readahead+0x3f9/0x550
read_pages+0x196/0xb10
page_cache_ra_unbounded+0x391/0x6a0
force_page_cache_ra+0x253/0x370
page_cache_sync_ra+0x104/0xaa0
filemap_get_pages+0x354/0x18e0
filemap_read+0x388/0xcf0
blkdev_read_iter+0x1a3/0x510
vfs_read+0x868/0xc70
ksys_read+0x121/0x240
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7ab446704e
Code: 0f 1f 40 00 48 8b 15 79 9f 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffc1dce5648 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055baf693c3e8 RCX: 00007f7ab446704e
RDX: 0000000000000200 RSI: 000055baf693c3f8 RDI: 0000000000000010
RBP: 000055baf6938080 R08: 000055baf693c3d0 R09: 00007f7ab444dbe0
R10: 0000000000000080 R11: 0000000000000246 R12: 0000000000020000
R13: 0000000000000200 R14: 000055baf693c3d0 R15: 000055baf69380d0
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff8880161fef80 EFLAGS: 00010012
RAX: 0000000000000032 RBX: ffffffffffffffa1 RCX: 0000000000000002
RDX: ffff8880474f9b80 RSI: ffffffff818995b7 RDI: 0000000000000191
RBP: ffff8880161ff1f0 R08: ffff88806ce31340 R09: ffffe8ffffc15e18
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007f7ab3ece8c0(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29914d6fe8 CR3: 0000000009e12000 CR4: 0000000000350ef0
note: systemd-udevd[4122] exited with irqs disabled
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000032: 0000 [#2] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197]
CPU: 0 UID: 0 PID: 4122 Comm: systemd-udevd Tainted: G D W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary)
Tainted: [D]=DIE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff88806ce08b80 EFLAGS: 00010012
RAX: 0000000000000032 RBX: ffffffffffffffa1 RCX: 0000000000000002
RDX: ffff8880474f9b80 RSI: ffffffff818995b7 RDI: 0000000000000191
RBP: ffff88806ce08df0 R08: ffff88806ce313e8 R09: ffffe8ffffc15e18
R10: 0000000000000000 R11: ffff8880175ff498 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806ce313e8 R15: dffffc0000000000
FS: 00007f7ab3ece8c0(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29914d6fe8 CR3: 0000000009e12000 CR4: 0000000000350ef0
Call Trace:
perf_trace_run_bpf_submit+0xef/0x180
perf_trace_preemptirq_template+0x259/0x430
trace_irq_enable.constprop.0+0xa6/0x100
trace_hardirqs_on+0x26/0x40
handle_softirqs+0x16e/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x70/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:make_task_dead+0xa2/0x3b0
Code: 38 00 85 db 0f 84 21 01 00 00 e8 d9 96 38 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 27 92 38 00 48 85 db 0f 84 17 01 00 00 b9 96 38 00 31 ff 65 8b 1d 60 df 48 06 81 e3 ff ff ff 7f 89 de
RSP: 0018:ffff8880161fff28 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff8880474f9b80 RCX: ffffffff817c2b86
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff813b5234
RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff8643ac57 R11: 0000000000000001 R12: ffff8880474f9b80
R13: 0000000000000000 R14: dffffc0000000032 R15: 0000000000000000
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7f7ab446704e
Code: 0f 1f 40 00 48 8b 15 79 9f 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffc1dce5648 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055baf693c3e8 RCX: 00007f7ab446704e
RDX: 0000000000000200 RSI: 000055baf693c3f8 RDI: 0000000000000010
RBP: 000055baf6938080 R08: 000055baf693c3d0 R09: 00007f7ab444dbe0
R10: 0000000000000080 R11: 0000000000000246 R12: 0000000000020000
R13: 0000000000000200 R14: 000055baf693c3d0 R15: 000055baf69380d0
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:perf_tp_event+0x175/0xe70
Code: ff df 48 89 85 a8 fd ff ff 48 c1 e8 03 4c 01 e0 48 89 85 c8 fd ff ff e8 c9 51 ea ff 48 8d bb f0 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 08 3c 03 0f 8e c5 0b 00 00 44 8b ab f0 01
RSP: 0018:ffff8880161fef80 EFLAGS: 00010012
RAX: 0000000000000032 RBX: ffffffffffffffa1 RCX: 0000000000000002
RDX: ffff8880474f9b80 RSI: ffffffff818995b7 RDI: 0000000000000191
RBP: ffff8880161ff1f0 R08: ffff88806ce31340 R09: ffffe8ffffc15e18
R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000014 R14: ffff88806ce31340 R15: dffffc0000000000
FS: 00007f7ab3ece8c0(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29914d6fe8 CR3: 0000000009e12000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: df 48 89 fisttps -0x77(%rax)
3: 85 a8 fd ff ff 48 test %ebp,0x48fffffd(%rax)
9: c1 e8 03 shr $0x3,%eax
c: 4c 01 e0 add %r12,%rax
f: 48 89 85 c8 fd ff ff mov %rax,-0x238(%rbp)
16: e8 c9 51 ea ff callq 0xffea51e4
1b: 48 8d bb f0 01 00 00 lea 0x1f0(%rbx),%rdi
22: 48 89 f8 mov %rdi,%rax
25: 48 c1 e8 03 shr $0x3,%rax
* 29: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 74 08 je 0x3a
32: 3c 03 cmp $0x3,%al
34: 0f 8e c5 0b 00 00 jle 0xbff
3a: 44 rex.R
3b: 8b .byte 0x8b
3c: ab stos %eax,%es:(%rdi)
3d: f0 lock
3e: 01 .byte 0x1