linux-kernel - [syzbot] [scsi?] BUG: sleeping function called from invalid context in __bio_release

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <691560c4.a70a0220.3124cb.001a.GAE@google.com>
Date: Wed, 12 Nov 2025 20:38:28 -0800
From: syzbot <syzbot+c01f8e6e73f20459912e@...kaller.appspotmail.com>
To: James.Bottomley@...senPartnership.com, dgilbert@...erlog.com, 
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org, 
	martin.petersen@...cle.com, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [scsi?] BUG: sleeping function called from invalid context
 in __bio_release_pages (2)

Hello,

syzbot found the following issue on:

HEAD commit:    e9a6fb0bcdd7 Linux 6.18-rc5
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11dd07cd980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=19d831c6d0386a9c
dashboard link: https://syzkaller.appspot.com/bug?extid=c01f8e6e73f20459912e
compiler:       gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9c9e524eb3ff/disk-e9a6fb0b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/db8dffcaebcd/vmlinux-e9a6fb0b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e341232467cd/bzImage-e9a6fb0b.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c01f8e6e73f20459912e@...kaller.appspotmail.com

BUG: sleeping function called from invalid context at ./include/linux/pagemap.h:1139
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 12867, name: kworker/0:6
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
3 locks held by kworker/0:6/12867:
 #0: ffff88813ff15948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3238
 #1: ffffc90003ddfd00 ((work_completion)(&sfp->ew.work)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3239
 #2: ffff88802a618080 (&sfp->rq_list_lock){..-.}-{3:3}, at: sg_remove_sfp_usercontext+0x81/0x590 drivers/scsi/sg.c:2208
irq event stamp: 943738
hardirqs last  enabled at (943737): [<ffffffff8b601a33>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last  enabled at (943737): [<ffffffff8b601a33>] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
hardirqs last disabled at (943738): [<ffffffff8b601ed2>] __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:184 [inline]
hardirqs last disabled at (943738): [<ffffffff8b601ed2>] _raw_write_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:318
softirqs last  enabled at (943720): [<ffffffff89b46670>] local_bh_enable include/linux/bottom_half.h:33 [inline]
softirqs last  enabled at (943720): [<ffffffff89b46670>] update_defense_level+0x5d0/0xf70 net/netfilter/ipvs/ip_vs_ctl.c:210
softirqs last disabled at (943718): [<ffffffff89b46184>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (943718): [<ffffffff89b46184>] update_defense_level+0xe4/0xf70 net/netfilter/ipvs/ip_vs_ctl.c:112
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 12867 Comm: kworker/0:6 Tainted: G     U              syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events sg_remove_sfp_usercontext
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 __might_resched+0x3c0/0x5e0 kernel/sched/core.c:8927
 folio_lock include/linux/pagemap.h:1139 [inline]
 __bio_release_pages+0x312/0x3b0 block/bio.c:1147
 bio_release_pages include/linux/bio.h:472 [inline]
 blk_rq_unmap_user+0x3be/0x980 block/blk-map.c:639
 sg_finish_rem_req+0xde/0x590 drivers/scsi/sg.c:1835
 sg_remove_sfp_usercontext+0x103/0x590 drivers/scsi/sg.c:2211
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup