From: syzbot ci <syzbot+ci472e62ec00dbd79b@syzkaller.appspotmail.com>
To: axboe@kernel.dk, bvanassche@acm.org, eadavis@qq.com, hch@lst.de,
jfs-discussion@lists.sourceforge.net,
linux-block@vger.kernel.org, nilay@linux.ibm.com,
penguin-kernel@i-love.sakura.ne.jp, shaggy@kernel.org
Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com
Subject: [syzbot ci] Re: loop: Detect write requests that failed to wait for completion.
Date: Sun, 11 Oct 2026 12:24:24 -0700 [thread overview]
Message-ID: <6acbe268.8cdf6287.1eb53.00ed.GAE@google.com> (raw)
In-Reply-To: <cc2910d3-3113-44d4-94ef-0c8d365fac9c@I-love.SAKURA.ne.jp>
syzbot ci has tested the following series
[v3] loop: Detect write requests that failed to wait for completion.
https://lore.kernel.org/all/cc2910d3-3113-44d4-94ef-0c8d365fac9c@I-love.SAKURA.ne.jp
* [PATCH v3] loop: Detect write requests that failed to wait for completion.
and found the following issues:
* BUG: found I/O issued by syz.NUM.NUM/NUM but loop0 is no longer bound.
* BUG: found I/O issued by syz.NUM.NUM/NUM but loop2 is no longer bound.
Full report is available here:
https://ci.syzbot.org/series/d3a0b036-fd1e-44c6-8869-386ea1642385
***
BUG: found I/O issued by syz.NUM.NUM/NUM but loop0 is no longer bound.
tree: axboe
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/axboe/linux.git
base: 4da93acb4f2ed06640255ad98801d0f0c734ff07
arch: amd64
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
config: https://ci.syzbot.org/builds/a23afb97-88bb-4fba-8885-d3062b5890e2/config
syz repro: https://ci.syzbot.org/findings/c9ad5ff9-784f-4528-805f-7971e0359600/syz_repro
BUG: found I/O issued by syz.0.760/7647 but loop0 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.0.760/7647 but loop0 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
***
BUG: found I/O issued by syz.NUM.NUM/NUM but loop2 is no longer bound.
tree: axboe
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/axboe/linux.git
base: 4da93acb4f2ed06640255ad98801d0f0c734ff07
arch: amd64
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
config: https://ci.syzbot.org/builds/a23afb97-88bb-4fba-8885-d3062b5890e2/config
syz repro: https://ci.syzbot.org/findings/bad9ae98-7887-4209-8226-7e84bb070faa/syz_repro
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: found I/O issued by syz.2.866/7955 but loop2 is no longer bound.
Call Trace:
loop_queue_rq+0x232/0xc90 drivers/block/loop.c:1922
__blk_mq_issue_directly block/blk-mq.c:2708 [inline]
blk_mq_try_issue_directly+0x3f4/0x880 block/blk-mq.c:2768
blk_mq_submit_bio+0x21de/0x2bb0 block/blk-mq.c:3220
__submit_bio_noacct_mq block/blk-core.c:756 [inline]
submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
bh_submit fs/buffer.c:1146 [inline]
__bh_read fs/buffer.c:2943 [inline]
bh_readahead include/linux/buffer_head.h:437 [inline]
__breadahead+0x15c/0x1f0 fs/buffer.c:1359
nilfs_search_super_root+0x2be/0x1530 fs/nilfs2/recovery.c:891
load_nilfs+0x363/0xfb0 fs/nilfs2/the_nilfs.c:259
nilfs_fill_super+0x1a0/0x4e0 fs/nilfs2/super.c:1073
nilfs_get_tree+0x491/0x850 fs/nilfs2/super.c:1226
vfs_get_tree+0x92/0x2a0 fs/super.c:1932
fc_mount fs/namespace.c:1198 [inline]
do_new_mount_fc fs/namespace.c:3772 [inline]
do_new_mount+0x319/0xdc0 fs/namespace.c:3848
do_mount fs/namespace.c:4181 [inline]
__do_sys_mount fs/namespace.c:4397 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4374
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
***
If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
Tested-by: syzbot@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
To test a fix for this bug, please reply with `#syz test`
(on a separate line) and attach the patch to the email.
Notes:
- The patch will be applied on top of the tested series (as an
incremental fix).
- To test a new version of the whole series, please send it directly
to syzbot@lists.linux.dev.
- Arguments like custom git repos and branches are not supported.
next prev parent reply other threads:[~2026-10-11 19:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-05 21:06 [PATCH v6] loop: Wait for I/O completion in __loop_clr_fd() Bart Van Assche
2026-10-06 12:01 ` Tetsuo Handa
2026-10-06 17:15 ` Bart Van Assche
2026-10-07 13:08 ` Christoph Hellwig
2026-10-07 13:35 ` Tetsuo Handa
2026-10-11 10:37 ` [PATCH] loop: Detect write requests that failed to wait for completion Tetsuo Handa
2026-10-11 11:29 ` [PATCH v2] " Tetsuo Handa
2026-10-11 13:26 ` [PATCH v3] " Tetsuo Handa
2026-10-11 19:24 ` syzbot ci [this message]
2026-10-12 8:26 ` [PATCH] block: Wait for inflight requests in bdev_release() Tetsuo Handa
2026-10-12 11:39 ` Tetsuo Handa
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