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
buffer_io_error: 14 callbacks suppressed
Buffer I/O error on dev sr0, logical block 0, async page read
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: 4027 Comm: syz-executor.6 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:ffff8880480cf4a0 EFLAGS: 00010056
RAX: 0000000000000000 RBX: ffff8880472ce518 RCX: ffffc90006a2e000
RDX: 0000000000040000 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000001 R09: fffffbfff0f128f4
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888046a1d000
FS: 00007f5dcf42d700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555563759c58 CR3: 000000001e937000 CR4: 0000000000350ef0
I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Call Trace:
queue_work_on+0xd0/0xe0
Buffer I/O error on dev sr0, logical block 1, async page read
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
__bread_gfp+0x18b/0x3c0
isofs_fill_super+0x582/0x2bd0
kmemleak: Found object by alias at 0x607f1a63636c
CPU: 1 UID: 0 PID: 4026 Comm: syz-executor.4 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
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: 0033:0x7f2504c3bb19
Code: Unable to access opcode bytes at 0x7f2504c3baef.
RSP: 002b:00007ffc8fdbbf38 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f2504c3bb19
RDX: 00007f2504bee72b RSI: ffffffffffffffbc RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000001b2d029afc R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffc8fdbc020
kmemleak: Object (percpu) 0x607f1a636368 (size 8):
kmemleak: comm "cron", pid 4016, jiffies 4294805180
kmemleak: min_count = 1
kmemleak: count = 1
kmemleak: flags = 0x21
kmemleak: checksum = 0
kmemleak: backtrace:
pcpu_alloc_noprof+0x87a/0x1170
percpu_ref_init+0x37/0x400
wb_get_create+0x25b/0x1120
__inode_attach_wb+0x2e2/0xc70
__mark_inode_dirty+0xae3/0xd00
d_tmpfile+0x50/0x80
ext4_tmpfile+0x291/0x4c0
vfs_tmpfile+0x2c6/0x8a0
path_openat+0x14bc/0x2880
do_filp_open+0x1e8/0x450
do_sys_openat2+0x104/0x1b0
__x64_sys_openat+0x142/0x200
do_syscall_64+0xbf/0x360
entry_SYSCALL_64_after_hwframe+0x77/0x7f
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
get_tree_bdev_flags+0x38a/0x620
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
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
vfs_get_tree+0x93/0x340
path_mount+0x132d/0x1dd0
Buffer I/O error on dev sr0, logical block 3, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 4 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 4, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
__x64_sys_mount+0x27b/0x300
I/O error, dev sr0, sector 5 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Buffer I/O error on dev sr0, logical block 5, async page read
do_syscall_64+0xbf/0x360
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
entry_SYSCALL_64_after_hwframe+0x77/0x7f
I/O error, dev sr0, sector 6 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
RIP: 0033:0x7f5dd1eb904a
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:00007f5dcf42cfa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f5dd1eb904a
Buffer I/O error on dev sr0, logical block 6, async page read
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f5dcf42d000
RBP: 00007f5dcf42d040 R08: 00007f5dcf42d040 R09: 0000000020000000
R10: 0000000000000001 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f5dcf42d000 R15: 0000000020000400
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
I/O error, dev sr0, sector 7 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x202/0x1240
Buffer I/O error on dev sr0, logical block 7, async page read
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
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
RSP: 0018:ffff8880480cf4a0 EFLAGS: 00010056
I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
RAX: 0000000000000000 RBX: ffff8880472ce518 RCX: ffffc90006a2e000
RDX: 0000000000040000 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff888046a1d000
Buffer I/O error on dev sr0, logical block 0, async page read
FS: 00007f5dcf42d700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555563759c58 CR3: 000000001e937000 CR4: 0000000000350ef0
note: syz-executor.6[4027] exited with irqs disabled
note: syz-executor.6[4027] exited with preempt_count 1
Buffer I/O error on dev sr0, logical block 1, async page read
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
------------[ cut here ]------------
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
WARNING: kernel/exit.c:898 at do_exit+0x1c36/0x2970, CPU#0: syz-executor.6/4027
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Modules linked in:
CPU: 0 UID: 0 PID: 4027 Comm: syz-executor.6 Tainted: G D W 6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary)
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Tainted: [D]=DIE, [W]=WARN
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
sr 1:0:0:0: [sr0] tag#0 unaligned transfer
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:ffff8880480cfe40 EFLAGS: 00010246
RAX: 0000000000040000 RBX: 0000000000000200 RCX: ffffc90006a2e000
RDX: 0000000000040000 RSI: ffffffff813b42d5 RDI: ffff888046a048e8
RBP: ffff888046a03700 R08: 0000000000000001 R09: fffffbfff0f126d8
R10: 0000000000000200 R11: 6637303030302052 R12: 000000000000000b
R13: 0000000000002710 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007f5dcf42d700(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555563759c58 CR3: 000000001e937000 CR4: 0000000000350ef0
Call Trace:
make_task_dead+0x174/0x3b0
rewind_stack_and_make_dead+0x16/0x20
RIP: 0033:0x7f5dd1eb904a
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:00007f5dcf42cfa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f5dd1eb904a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f5dcf42d000
RBP: 00007f5dcf42d040 R08: 00007f5dcf42d040 R09: 0000000020000000
R10: 0000000000000001 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f5dcf42d000 R15: 0000000020000400
irq event stamp: 4242
hardirqs last enabled at (4241): [] ktime_get+0x1c7/0x270
hardirqs last disabled at (4242): [] _raw_spin_lock_irq+0x42/0x50
softirqs last enabled at (3866): [] handle_softirqs+0x50c/0x770
softirqs last disabled at (3333): [] __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: 4027, name: syz-executor.6
preempt_count: 0, expected: 0
RCU nest depth: 2, expected: 0
INFO: lockdep is turned off.
CPU: 0 UID: 0 PID: 4027 Comm: syz-executor.6 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: 0033:0x7f5dd1eb904a
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:00007f5dcf42cfa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f5dd1eb904a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f5dcf42d000
RBP: 00007f5dcf42d040 R08: 00007f5dcf42d040 R09: 0000000020000000
R10: 0000000000000001 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f5dcf42d000 R15: 0000000020000400
----------------
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)