null_blk: mydev: using native zone append
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:623
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 6033, name: syz-executor412
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
locks held by syz-executor412/6033: 6, last CPU#0:
 #0: ffff888024494460 (sb_writers#13){.+.+}-{0:0}, at: ksys_write+0x12a/0x250 fs/read_write.c:739
 #1: ffff888025c1c880 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x76/0x4e0 fs/configfs/file.c:226
 #2: ffff88802a5b2170 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
 #2: ffff88802a5b2170 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x218/0x4e0 fs/configfs/file.c:229
 #3: ffffffff8fe5a8c0 (lock#6){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
 #3: ffffffff8fe5a8c0 (lock#6){+.+.}-{4:4}, at: nullb_device_power_store+0xde/0x350 drivers/block/null_blk/main.c:506
 #4: ffff88802d4d2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe40 block/bdev.c:990
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: blk_mq_submit_bio+0x21b2/0x3000 block/blk-mq.c:3208
CPU: 0 UID: 0 PID: 6033 Comm: syz-executor412 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 __might_resched.cold+0x1dc/0x222 kernel/sched/core.c:9234
 __mutex_lock_common kernel/locking/mutex.c:623 [inline]
 __mutex_lock+0x10e/0x1bd0 kernel/locking/mutex.c:821
 null_lock_zone drivers/block/null_blk/zoned.c:41 [inline]
 null_lock_zone drivers/block/null_blk/zoned.c:35 [inline]
 null_process_zoned_cmd+0x9b7/0x1140 drivers/block/null_blk/zoned.c:738
 null_handle_cmd drivers/block/null_blk/main.c:1463 [inline]
 null_queue_rq+0x664/0xfb0 drivers/block/null_blk/main.c:1711
 __blk_mq_issue_directly+0xe2/0x200 block/blk-mq.c:2694
 blk_mq_try_issue_directly+0x21b/0x420 block/blk-mq.c:2754
 blk_mq_submit_bio+0x21ec/0x3000 block/blk-mq.c:3208
 __submit_bio+0x90/0x3d0 block/blk-core.c:673
 __submit_bio_noacct_mq block/blk-core.c:756 [inline]
 submit_bio_noacct_nocheck+0x549/0xc00 block/blk-core.c:790
 submit_bio_noacct+0xc93/0x2130 block/blk-core.c:925
 blk_crypto_submit_bio include/linux/blk-crypto.h:212 [inline]
 __bh_submit+0x7ce/0xaa0 fs/buffer.c:1132
 bh_submit fs/buffer.c:1146 [inline]
 block_read_full_folio+0x496/0x8c0 fs/buffer.c:2373
 filemap_read_folio+0xfc/0x3b0 mm/filemap.c:2520
 do_read_cache_folio+0x2d7/0x6b0 mm/filemap.c:4156
 read_mapping_folio include/linux/pagemap.h:1015 [inline]
 read_part_sector+0xd1/0x370 block/partitions/core.c:724
 adfspart_check_ICS+0x91/0x7d0 block/partitions/acorn.c:357
 check_partition block/partitions/core.c:143 [inline]
 blk_add_partitions block/partitions/core.c:591 [inline]
 bdev_disk_changed+0x7b1/0x1260 block/partitions/core.c:695
 blkdev_get_whole+0x187/0x290 block/bdev.c:793
 bdev_open+0x2c7/0xe40 block/bdev.c:1002
 bdev_file_open_by_dev block/bdev.c:1104 [inline]
 bdev_file_open_by_dev+0x179/0x210 block/bdev.c:1079
 disk_scan_partitions+0x1ef/0x320 block/genhd.c:387
 add_disk_final block/genhd.c:412 [inline]
 add_disk_fwnode+0x3f4/0x480 block/genhd.c:606
 add_disk include/linux/blkdev.h:798 [inline]
 null_add_dev+0x129d/0x1df0 drivers/block/null_blk/main.c:2061
 nullb_device_power_store+0x29d/0x350 drivers/block/null_blk/main.c:511
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x302/0x4e0 fs/configfs/file.c:229
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6af/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78b88f72f7
Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffdbea5b950 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000555589893400 RCX: 00007f78b88f72f7
RDX: 0000000000000002 RSI: 00007f78b8930060 RDI: 0000000000000003
RBP: 00007f78b8930060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007f78b8932238
R13: 0000000000000002 R14: 00007f78b895acc0 R15: 0000000000000002
 </TASK>

=============================
[ BUG: Invalid wait context ]
syzkaller #0 Tainted: G        W          
-----------------------------
syz-executor412/6033 is trying to lock:
ffff888056f80060 (&zone->mutex){+.+.}-{4:4}, at: null_lock_zone drivers/block/null_blk/zoned.c:41 [inline]
ffff888056f80060 (&zone->mutex){+.+.}-{4:4}, at: null_lock_zone drivers/block/null_blk/zoned.c:35 [inline]
ffff888056f80060 (&zone->mutex){+.+.}-{4:4}, at: null_process_zoned_cmd+0x9b7/0x1140 drivers/block/null_blk/zoned.c:738
other info that might help us debug this:
context-{5:5}
locks held by syz-executor412/6033: 6, last CPU#0:
 #0: ffff888024494460 (sb_writers#13){.+.+}-{0:0}, at: ksys_write+0x12a/0x250 fs/read_write.c:739
 #1: ffff888025c1c880 (&buffer->mutex){+.+.}-{4:4}, at: configfs_write_iter+0x76/0x4e0 fs/configfs/file.c:226
 #2: ffff88802a5b2170 (&p->frag_sem){.+.+}-{4:4}, at: flush_write_buffer fs/configfs/file.c:205 [inline]
 #2: ffff88802a5b2170 (&p->frag_sem){.+.+}-{4:4}, at: configfs_write_iter+0x218/0x4e0 fs/configfs/file.c:229
 #3: ffffffff8fe5a8c0 (lock#6){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
 #3: ffffffff8fe5a8c0 (lock#6){+.+.}-{4:4}, at: nullb_device_power_store+0xde/0x350 drivers/block/null_blk/main.c:506
 #4: ffff88802d4d2350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x41a/0xe40 block/bdev.c:990
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #5: ffffffff8edec060 (rcu_read_lock){....}-{1:3}, at: blk_mq_submit_bio+0x21b2/0x3000 block/blk-mq.c:3208
stack backtrace:
CPU: 0 UID: 0 PID: 6033 Comm: syz-executor412 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_lock_invalid_wait_context kernel/locking/lockdep.c:4846 [inline]
 check_wait_context kernel/locking/lockdep.c:4918 [inline]
 __lock_acquire+0x104c/0x1ec0 kernel/locking/lockdep.c:5204
 lock_acquire kernel/locking/lockdep.c:5908 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821
 null_lock_zone drivers/block/null_blk/zoned.c:41 [inline]
 null_lock_zone drivers/block/null_blk/zoned.c:35 [inline]
 null_process_zoned_cmd+0x9b7/0x1140 drivers/block/null_blk/zoned.c:738
 null_handle_cmd drivers/block/null_blk/main.c:1463 [inline]
 null_queue_rq+0x664/0xfb0 drivers/block/null_blk/main.c:1711
 __blk_mq_issue_directly+0xe2/0x200 block/blk-mq.c:2694
 blk_mq_try_issue_directly+0x21b/0x420 block/blk-mq.c:2754
 blk_mq_submit_bio+0x21ec/0x3000 block/blk-mq.c:3208
 __submit_bio+0x90/0x3d0 block/blk-core.c:673
 __submit_bio_noacct_mq block/blk-core.c:756 [inline]
 submit_bio_noacct_nocheck+0x549/0xc00 block/blk-core.c:790
 submit_bio_noacct+0xc93/0x2130 block/blk-core.c:925
 blk_crypto_submit_bio include/linux/blk-crypto.h:212 [inline]
 __bh_submit+0x7ce/0xaa0 fs/buffer.c:1132
 bh_submit fs/buffer.c:1146 [inline]
 block_read_full_folio+0x496/0x8c0 fs/buffer.c:2373
 filemap_read_folio+0xfc/0x3b0 mm/filemap.c:2520
 do_read_cache_folio+0x2d7/0x6b0 mm/filemap.c:4156
 read_mapping_folio include/linux/pagemap.h:1015 [inline]
 read_part_sector+0xd1/0x370 block/partitions/core.c:724
 adfspart_check_ICS+0x91/0x7d0 block/partitions/acorn.c:357
 check_partition block/partitions/core.c:143 [inline]
 blk_add_partitions block/partitions/core.c:591 [inline]
 bdev_disk_changed+0x7b1/0x1260 block/partitions/core.c:695
 blkdev_get_whole+0x187/0x290 block/bdev.c:793
 bdev_open+0x2c7/0xe40 block/bdev.c:1002
 bdev_file_open_by_dev block/bdev.c:1104 [inline]
 bdev_file_open_by_dev+0x179/0x210 block/bdev.c:1079
 disk_scan_partitions+0x1ef/0x320 block/genhd.c:387
 add_disk_final block/genhd.c:412 [inline]
 add_disk_fwnode+0x3f4/0x480 block/genhd.c:606
 add_disk include/linux/blkdev.h:798 [inline]
 null_add_dev+0x129d/0x1df0 drivers/block/null_blk/main.c:2061
 nullb_device_power_store+0x29d/0x350 drivers/block/null_blk/main.c:511
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x302/0x4e0 fs/configfs/file.c:229
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6af/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78b88f72f7
Code: 48 89 fa 4c 89 df e8 98 1d 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffdbea5b950 EFLAGS: 00000202 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000555589893400 RCX: 00007f78b88f72f7
RDX: 0000000000000002 RSI: 00007f78b8930060 RDI: 0000000000000003
RBP: 00007f78b8930060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007f78b8932238
R13: 0000000000000002 R14: 00007f78b895acc0 R15: 0000000000000002
 </TASK>
null_blk: disk mydev created