sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 a9 40 00 00 40 00
critical target error, dev sr0, sector 2008320 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
critical target error, dev sr0, sector 2008576 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
INFO: task syz-executor.6:4371 blocked for more than 143 seconds.
      Not tainted 6.18.0-rc2-next-20251024 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.6  state:D stack:26096 pid:4371  tgid:4369  ppid:288    task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0xf85/0x3e30
 schedule+0xdb/0x390
 schedule_preempt_disabled+0x10/0x20
 rwsem_down_read_slowpath+0x575/0xca0
 down_read+0xec/0x470
 blkdev_write_iter+0x789/0xd00
 do_iter_readv_writev+0x5b3/0x910
 vfs_writev+0x2d4/0xcd0
 do_pwritev+0x1ab/0x280
 __x64_sys_pwritev2+0xef/0x160
 do_syscall_64+0xbf/0x390
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc9d849b19
RSP: 002b:00007fdc9adbf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fdc9d95cf60 RCX: 00007fdc9d849b19
RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000008
RBP: 00007fdc9d8a3f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000600 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe63c610ff R14: 00007fdc9adbf300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.6:4371 <reader> blocked on an rw-semaphore likely owned by task syz-executor.5:4331 <writer>
task:syz-executor.5  state:D stack:26568 pid:4331  tgid:4328  ppid:286    task_flags:0x400040 flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0xf85/0x3e30
 schedule+0xdb/0x390
 io_schedule+0xbf/0x130
 blk_mq_get_tag+0x568/0xaa0
 __blk_mq_alloc_requests+0x6ed/0x15a0
 blk_mq_submit_bio+0x1c9a/0x2b70
 __submit_bio+0x17f/0x5b0
 submit_bio_noacct_nocheck+0x552/0xb60
 submit_bio_noacct+0x35b/0x1350
 bio_chain_and_submit+0x2f/0x40
 __blkdev_issue_zero_pages+0x2ee/0x630
 blkdev_issue_zeroout+0x540/0x800
 blkdev_fallocate+0x387/0x450
 vfs_fallocate+0x3fb/0xd60
 __x64_sys_fallocate+0xd6/0x150
 do_syscall_64+0xbf/0x390
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f27e5515b19
RSP: 002b:00007f27e2a8b188 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f27e5628f60 RCX: 00007f27e5515b19
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007f27e556ff6d R08: 0000000000000000 R09: 0000000000000000
R10: 7fffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffffeb8aa9f R14: 00007f27e2a8b300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffffffff85e1dca0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0
1 lock held by systemd-journal/97:
 #0: ffff88806cf36ed8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2e6/0x3e30
1 lock held by in:imklog/176:
2 locks held by syz-executor.5/4331:
1 lock held by syz-executor.6/4371:
 #0: ffff888009056cd8 (&sb->s_type->i_mutex_key#6){++++}-{4:4}, at: blkdev_write_iter+0x789/0xd00

=============================================

scsi_io_completion_action: 234 callbacks suppressed
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e4 00 00 00 40 00
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e4 40 00 00 40 00
blk_print_req_error: 234 callbacks suppressed
critical target error, dev sr0, sector 2068736 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e4 80 00 00 40 00
critical target error, dev sr0, sector 2068992 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e4 c0 00 00 40 00
critical target error, dev sr0, sector 2069248 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e5 00 00 00 40 00
critical target error, dev sr0, sector 2069504 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e5 40 00 00 40 00
critical target error, dev sr0, sector 2069760 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e5 80 00 00 40 00
critical target error, dev sr0, sector 2070016 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e5 c0 00 00 40 00
critical target error, dev sr0, sector 2070272 op 0x1:(WRITE) flags 0x0 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e6 00 00 00 40 00
critical target error, dev sr0, sector 2070528 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
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 : Illegal Request [current] 
sr 1:0:0:0: [sr0] tag#0 Add. Sense: Invalid command operation code
sr 1:0:0:0: [sr0] tag#0 CDB: Write(10) 2a 00 00 07 e6 40 00 00 40 00
critical target error, dev sr0, sector 2070784 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
critical target error, dev sr0, sector 2071040 op 0x1:(WRITE) flags 0x4000 phys_seg 32 prio class 2
sr 1:0:0:0: [sr0] tag#0 unaligned transfer