loop2: detected capacity change from 0 to 640
Oops: general protection fault, probably for non-canonical address 0xdffffc0003b99da0: 0000 [#1] SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x000000001dcced00-0x000000001dcced07]
CPU: 1 UID: 0 PID: 4025 Comm: syz-executor.2 Tainted: G W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__queue_work+0x202/0x1240
Code: 48 8b 6d 00 e8 4f ee 79 03 31 ff 41 89 c5 89 c6 e8 c3 02 32 00 45 85 ed 0f 85 e1 05 00 00 e8 85 07 32 00 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 a0 0e 00 00 4c 8b 75 00 48 89 df 4c 89 34 24
RSP: 0018:ffff88801b19f3d0 EFLAGS: 00010016
RAX: 0000000003b99da0 RBX: ffff888047193418 RCX: ffffc900070c2000
RDX: 0000000000040000 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 000000001dcced00 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: ffff8880486f7000
FS: 00007feac7b79700(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5d9ab2a718 CR3: 000000001beac000 CR4: 0000000000350ef0
Call Trace:
queue_work_on+0xd0/0xe0
loop_queue_rq+0x5c8/0x1180
__blk_mq_issue_directly+0xd5/0x260
blk_mq_request_issue_directly+0x11c/0x1e0
blk_mq_issue_direct+0x192/0x640
blk_mq_dispatch_queue_requests+0x4b0/0x7c0
blk_mq_flush_plug_list+0x1ec/0x5b0
__blk_flush_plug+0x25c/0x460
__submit_bio+0x480/0x5b0
submit_bio_noacct_nocheck+0x68e/0xcb0
submit_bio_noacct+0x359/0x1350
ext4_read_bh_nowait+0x156/0x240
ext4_sb_breadahead_unmovable+0xb5/0xf0
ext4_fill_super+0x4f39/0xba20
get_tree_bdev_flags+0x38a/0x620
vfs_get_tree+0x93/0x340
path_mount+0x132d/0x1dd0
__x64_sys_mount+0x27b/0x300
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feaca60504a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 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:00007feac7b78fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007feaca60504a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007feac7b79000
RBP: 00007feac7b79040 R08: 00007feac7b79040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007feac7b79000 R15: 0000000020014900
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x202/0x1240
Code: 48 8b 6d 00 e8 4f ee 79 03 31 ff 41 89 c5 89 c6 e8 c3 02 32 00 45 85 ed 0f 85 e1 05 00 00 e8 85 07 32 00 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 a0 0e 00 00 4c 8b 75 00 48 89 df 4c 89 34 24
RSP: 0018:ffff88801b19f3d0 EFLAGS: 00010016
RAX: 0000000003b99da0 RBX: ffff888047193418 RCX: ffffc900070c2000
RDX: 0000000000040000 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 000000001dcced00 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: ffff8880486f7000
FS: 00007feac7b79700(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5d9ab2a718 CR3: 000000001beac000 CR4: 0000000000350ef0
note: syz-executor.2[4025] exited with irqs disabled
note: syz-executor.2[4025] exited with preempt_count 1
------------[ cut here ]------------
WARNING: kernel/exit.c:898 at do_exit+0x1c36/0x2970, CPU#1: syz-executor.2/4025
Modules linked in:
CPU: 1 UID: 0 PID: 4025 Comm: syz-executor.2 Tainted: G D W 6.17.0-rc4-next-20250901 #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:do_exit+0x1c36/0x2970
Code: 96 0a 00 00 c7 43 18 00 00 00 00 e9 21 e6 ff ff e8 ef b3 38 00 bf 02 24 00 00 e8 f5 ab 0b 00 e9 41 ff ff ff e8 db b3 38 00 90 <0f> 0b 90 e9 87 e4 ff ff e8 cd b3 38 00 4c 89 e6 bf 05 06 00 00 e8
RSP: 0018:ffff88801b19fe40 EFLAGS: 00010216
RAX: 000000000003d373 RBX: 0000000000000200 RCX: ffffc900070c2000
RDX: 0000000000040000 RSI: ffffffff813b42d5 RDI: ffff888015c42d68
RBP: ffff888015c41b80 R08: 0000000000000001 R09: fffffbfff0f126d8
R10: 0000000000000200 R11: 0000000000000001 R12: 000000000000000b
R13: 0000000000002710 R14: dffffc0003b99da0 R15: 0000000000000000
FS: 00007feac7b79700(0000) GS:ffff8880e56d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5d9ab2a718 CR3: 000000001beac000 CR4: 0000000000350ef0
Call Trace:
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7feaca60504a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 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:00007feac7b78fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007feaca60504a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007feac7b79000
RBP: 00007feac7b79040 R08: 00007feac7b79040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007feac7b79000 R15: 0000000020014900
irq event stamp: 1816
hardirqs last enabled at (1815): [] ktime_get+0x1c7/0x270
hardirqs last disabled at (1816): [] _raw_spin_lock_irq+0x42/0x50
softirqs last enabled at (1614): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (1605): [] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
BUG: sleeping function called from invalid context at ./include/linux/percpu-rwsem.h:51
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 4025, name: syz-executor.2
preempt_count: 0, expected: 0
RCU nest depth: 2, expected: 0
INFO: lockdep is turned off.
CPU: 1 UID: 0 PID: 4025 Comm: syz-executor.2 Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [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+0xfa/0x120
__might_resched+0x2f3/0x510
exit_signals+0x25/0x940
do_exit+0x2db/0x2970
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7feaca60504a
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 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:00007feac7b78fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007feaca60504a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007feac7b79000
RBP: 00007feac7b79040 R08: 00007feac7b79040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007feac7b79000 R15: 0000000020014900
audit: type=1400 audit(1756782512.623:10): avc: denied { read } for pid=4021 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
sr 1:0:0:0: [sr0] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
sr 1:0:0:0: [sr0] tag#0 Sense Key : Not Ready [current]
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Medium not present
sr 1:0:0:0: [sr0] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 06 00
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 3 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
audit: type=1400 audit(1756782512.623:11): avc: denied { write } for pid=4021 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
Buffer I/O error on dev sr0, logical block 0, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 1, async page read
loop0: detected capacity change from 0 to 4
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 2, async page read
loop0: detected capacity change from 0 to 4
kmemleak: Found object by alias at 0x607f1a63e7c4
CPU: 0 UID: 0 PID: 4024 Comm: syz-executor.3 Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
Tainted: [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: 0033:0x7f5d9d5888ac
Code: Unable to access opcode bytes at 0x7f5d9d588882.
RSP: 002b:00007f5d9ab4a020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: 0000000000000024 RBX: 00007f5d9ab4a110 RCX: 00007f5d9d5888ac
RDX: 0000000000000024 RSI: 00007f5d9ab4a160 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007f5d9ab4a074 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f5d9ab4a0c8
R13: 00007f5d9ab4a160 R14: 0000000000000003 R15: 0000000000000000
kmemleak: Object (percpu) 0x607f1a63e7c0 (size 8):
kmemleak: comm "syz-executor.2", pid 4025, jiffies 4294819132
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
__alloc_workqueue+0x74b/0x1820
alloc_workqueue_noprof+0xc7/0x200
loop_configure+0xf73/0x1590
lo_ioctl+0x66d/0x1c70
blkdev_ioctl+0x27c/0x6c0
__x64_sys_ioctl+0x18f/0x210
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
----------------
Code disassembly (best guess):
0: 48 8b 6d 00 mov 0x0(%rbp),%rbp
4: e8 4f ee 79 03 callq 0x379ee58
9: 31 ff xor %edi,%edi
b: 41 89 c5 mov %eax,%r13d
e: 89 c6 mov %eax,%esi
10: e8 c3 02 32 00 callq 0x3202d8
15: 45 85 ed test %r13d,%r13d
18: 0f 85 e1 05 00 00 jne 0x5ff
1e: e8 85 07 32 00 callq 0x3207a8
23: 48 89 e8 mov %rbp,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 0f 85 a0 0e 00 00 jne 0xed5
35: 4c 8b 75 00 mov 0x0(%rbp),%r14
39: 48 89 df mov %rbx,%rdi
3c: 4c 89 34 24 mov %r14,(%rsp)