==================================================================
BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x3a/0x60
Read of size 1 at addr ffff888017eec720 by task scsi_eh_1/55
CPU: 0 UID: 0 PID: 55 Comm: scsi_eh_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+0xca/0x120
print_report+0xcb/0x610
kasan_report+0xca/0x100
__kasan_check_byte+0x3a/0x50
lock_acquire+0xec/0x2f0
_raw_spin_lock_irqsave+0x3a/0x60
aio_complete+0x4e/0x8c0
aio_complete_rw+0x2cf/0x710
blkdev_bio_end_io+0x271/0x4b0
bio_endio+0x5ad/0x6b0
blk_update_request+0x2c5/0x1060
scsi_end_request+0x7a/0xa00
scsi_io_completion+0x92a/0x1640
scsi_eh_flush_done_q+0x328/0x480
ata_scsi_port_error_handler+0x142d/0x1b00
ata_scsi_error+0x1f0/0x320
scsi_error_handler+0x2aa/0xea0
kthread+0x3c8/0x740
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
Allocated by task 4152:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc_noprof+0x205/0x690
ioctx_alloc+0x150/0x1e10
__x64_sys_io_setup+0xc8/0x1f0
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 43:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
__kasan_save_free_info+0x3a/0x60
__kasan_slab_free+0x3f/0x50
kmem_cache_free+0x2a1/0x540
process_one_work+0x8e1/0x19c0
worker_thread+0x67e/0xe90
kthread+0x3c8/0x740
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
Last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__queue_work+0xa3b/0x1240
rcu_work_rcufn+0x5c/0x90
rcu_core+0x7c8/0x1800
handle_softirqs+0x1b1/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x70/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
Second to last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__call_rcu_common.constprop.0+0x70/0x960
queue_rcu_work+0xa9/0xe0
percpu_ref_put_many.constprop.0+0x267/0x2a0
rcu_core+0x7c8/0x1800
handle_softirqs+0x1b1/0x770
__irq_exit_rcu+0xc4/0x100
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x70/0x80
asm_sysvec_apic_timer_interrupt+0x1a/0x20
The buggy address belongs to the object at ffff888017eec440
which belongs to the cache kioctx of size 960
The buggy address is located 736 bytes inside of
freed 960-byte region [ffff888017eec440, ffff888017eec800)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17eec
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff8880097da8c0 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
head: 0100000000000040 ffff8880097da8c0 dead000000000122 0000000000000000
head: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000
head: 0100000000000002 ffffea00005fbb01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888017eec600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888017eec680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888017eec700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888017eec780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888017eec800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 55 Comm: scsi_eh_1 Tainted: G B W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary)
Tainted: [B]=BAD_PAGE, [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:aio_complete+0x117/0x8c0
Code: 03 80 3c 02 00 0f 85 a8 07 00 00 48 8b 53 58 44 89 e8 c1 e8 07 4c 8d 34 c2 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 68 07 00 00 48 c7 c0 50 92 84 85 4d 8b 36 48 ba
RSP: 0018:ffff888009f37928 EFLAGS: 00010056
RAX: dffffc0000000000 RBX: ffff888017eec440 RCX: ffffffff81cc4825
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888017eec498
RBP: ffff888044a1d3c0 R08: ffff888017eec700 R09: ffffed10013e6f13
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888017eec708
FS: 0000000000000000(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d13b000 CR3: 0000000043972000 CR4: 0000000000350ef0
Call Trace:
aio_complete_rw+0x2cf/0x710
blkdev_bio_end_io+0x271/0x4b0
bio_endio+0x5ad/0x6b0
blk_update_request+0x2c5/0x1060
scsi_end_request+0x7a/0xa00
scsi_io_completion+0x92a/0x1640
scsi_eh_flush_done_q+0x328/0x480
ata_scsi_port_error_handler+0x142d/0x1b00
ata_scsi_error+0x1f0/0x320
scsi_error_handler+0x2aa/0xea0
kthread+0x3c8/0x740
ret_from_fork+0x34b/0x430
ret_from_fork_asm+0x1a/0x30
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:aio_complete+0x117/0x8c0
Code: 03 80 3c 02 00 0f 85 a8 07 00 00 48 8b 53 58 44 89 e8 c1 e8 07 4c 8d 34 c2 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 68 07 00 00 48 c7 c0 50 92 84 85 4d 8b 36 48 ba
RSP: 0018:ffff888009f37928 EFLAGS: 00010056
RAX: dffffc0000000000 RBX: ffff888017eec440 RCX: ffffffff81cc4825
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888017eec498
RBP: ffff888044a1d3c0 R08: ffff888017eec700 R09: ffffed10013e6f13
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888017eec708
FS: 0000000000000000(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d13b000 CR3: 0000000043972000 CR4: 0000000000350ef0
note: scsi_eh_1[55] exited with irqs disabled
note: scsi_eh_1[55] exited with preempt_count 1
FAT-fs (loop5): count of clusters too big (3992318)
FAT-fs (loop5): Can't find a valid FAT filesystem
FAT-fs (loop5): count of clusters too big (3992318)
FAT-fs (loop5): Can't find a valid FAT filesystem
kmemleak: Found object by alias at 0x607f1a638f04
CPU: 1 UID: 0 PID: 4200 Comm: syz-executor.6 Tainted: G B D W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary)
Tainted: [B]=BAD_PAGE, [D]=DIE, [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: 0033:0x7f0ac0232b19
Code: Unable to access opcode bytes at 0x7f0ac0232aef.
RSP: 002b:00007f0abd7a8188 EFLAGS: 00000246 ORIG_RAX: 000000000000011b
RAX: 0000000000000004 RBX: 00007f0ac0345f60 RCX: 00007f0ac0232b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f0ac028cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd74b45d4f R14: 00007f0abd7a8300 R15: 0000000000022000
kmemleak: Object (percpu) 0x607f1a638f00 (size 8):
kmemleak: comm "syz-executor.3", pid 4205, jiffies 4294854193
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.3/4205
Modules linked in:
CPU: 0 UID: 0 PID: 4205 Comm: syz-executor.3 Tainted: G B D W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary)
Tainted: [B]=BAD_PAGE, [D]=DIE, [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:ffff888017f3f878 EFLAGS: 00010212
RAX: 0000000000027c69 RBX: 1ffff11002fe7f14 RCX: ffffc90005e0c000
RDX: 0000000000040000 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88800ae57880 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff888017f3f8e0
R13: 00000000ffffffff R14: dead000000000100 R15: ffff88800ae57880
FS: 00007fcdc3d5f700(0000) GS:ffff8880e55dd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555748a9c58 CR3: 0000000044b26000 CR4: 0000000000350ef0
Call Trace:
namespace_unlock+0x57d/0x810
put_mnt_ns+0xf5/0x120
free_nsproxy+0x3a/0x400
switch_task_namespaces+0xe2/0x100
copy_process+0x26c8/0x73c0
kernel_clone+0xea/0x7f0
__do_sys_clone3+0x1f5/0x280
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcdc67e9b19
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:00007fcdc3d5f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fcdc68fcf60 RCX: 00007fcdc67e9b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240
RBP: 00007fcdc6843f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff765cfeff R14: 00007fcdc3d5f300 R15: 0000000000022000
irq event stamp: 0
hardirqs last enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [] copy_process+0x1e08/0x73c0
softirqs last enabled at (0): [] copy_process+0x1e58/0x73c0
softirqs last disabled at (0): [<0000000000000000>] 0x0
---[ end trace 0000000000000000 ]---
kmemleak: Found object by alias at 0x607f1a638f04
CPU: 1 UID: 0 PID: 4225 Comm: syz-executor.6 Tainted: G B D W 6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary)
Tainted: [B]=BAD_PAGE, [D]=DIE, [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: 0033:0x7f0ac0232b19
Code: Unable to access opcode bytes at 0x7f0ac0232aef.
RSP: 002b:00007ffd74b45f78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f0ac0232b19
RDX: 00007f0ac01e572b RSI: ffffffffffffffbc RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000001b2d625194 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffd74b46060
kmemleak: Object (percpu) 0x607f1a638f00 (size 8):
kmemleak: comm "syz-executor.1", pid 4229, jiffies 4294854482
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
percpu_ref_init+0x37/0x400
ioctx_alloc+0x27f/0x1e10
__x64_sys_io_setup+0xc8/0x1f0
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
----------------
Code disassembly (best guess):
0: 03 80 3c 02 00 0f add 0xf00023c(%rax),%eax
6: 85 a8 07 00 00 48 test %ebp,0x48000007(%rax)
c: 8b 53 58 mov 0x58(%rbx),%edx
f: 44 89 e8 mov %r13d,%eax
12: c1 e8 07 shr $0x7,%eax
15: 4c 8d 34 c2 lea (%rdx,%rax,8),%r14
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 4c 89 f2 mov %r14,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 68 07 00 00 jne 0x79c
34: 48 c7 c0 50 92 84 85 mov $0xffffffff85849250,%rax
3b: 4d 8b 36 mov (%r14),%r14
3e: 48 rex.W
3f: ba .byte 0xba