[syzbot] [fs?] BUG: sleeping function called from invalid context in hook_sb_delete

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: ce7f1a983b07 Add linux-next specific files for 20250923
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=118724e2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e
dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1376e27c580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136e78e2580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c30be6f36c31/disk-ce7f1a98.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ae9ea347d4d8/vmlinux-ce7f1a98.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d59682a4f33c/bzImage-ce7f1a98.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+12479a...@syzkaller.appspotmail.com

BUG: sleeping function called from invalid context at fs/inode.c:1928
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6028, name: syz.0.17
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
2 locks held by syz.0.17/6028:
#0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffff8880326bc998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#1: ffff8880326bc998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: hook_sb_delete+0xae/0xbd0 security/landlock/fs.c:1405
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 UID: 0 PID: 6028 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
__might_resched+0x495/0x610 kernel/sched/core.c:8960
iput+0x2b/0xc50 fs/inode.c:1928
hook_sb_delete+0x6b5/0xbd0 security/landlock/fs.c:1468
security_sb_delete+0x80/0x150 security/security.c:1467
generic_shutdown_super+0xaa/0x2c0 fs/super.c:634
kill_anon_super fs/super.c:1281 [inline]
kill_litter_super+0x76/0xb0 fs/super.c:1291
deactivate_locked_super+0xbc/0x130 fs/super.c:473
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1327
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc08e18eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcd5efff18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc08e3e5fa0 RCX: 00007fc08e18eec9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000002c0
RBP: 00007fc08e211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc08e3e5fa0 R14: 00007fc08e3e5fa0 R15: 0000000000000002
</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 syzk...@googlegroups.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 syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

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

[Hillf Danton]

> Date: Tue, 23 Sep 2025 15:59:37 -0700 [thread overview]

> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: ce7f1a983b07 Add linux-next specific files for 20250923
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=118724e2580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e
> dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1376e27c580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136e78e2580000

#syz test

--- x/security/landlock/fs.c
+++ y/security/landlock/fs.c
@@ -1434,8 +1434,6 @@ static void hook_sb_delete(struct super_
spin_unlock(&inode->i_lock);
continue;
}
- /* Keeps a reference to this inode until the next loop walk. */
- __iget(inode);
spin_unlock(&inode->i_lock);

/*
@@ -1457,15 +1455,6 @@ static void hook_sb_delete(struct super_
* It is therefore not necessary to lock inode->i_lock.
*/
rcu_assign_pointer(landlock_inode(inode)->object, NULL);
- /*
- * At this point, we own the ihold() reference that was
- * originally set up by get_inode_object() and the
- * __iget() reference that we just set in this loop
- * walk. Therefore the following call to iput() will
- * not sleep nor drop the inode because there is now at
- * least two references to it.
- */
- iput(inode);
} else {
spin_unlock(&object->lock);
rcu_read_unlock();
@@ -1479,12 +1468,7 @@ static void hook_sb_delete(struct super_
* disappear from under us until the next loop walk.
*/
spin_unlock(&sb->s_inode_list_lock);
- /*
- * We can now actually put the inode reference from the
- * previous loop walk, which is not needed anymore.
- */
iput(prev_inode);
- cond_resched();
spin_lock(&sb->s_inode_list_lock);
}
prev_inode = inode;
--

[syzbot]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: syzbot+12479a...@syzkaller.appspotmail.com
Tested-by: syzbot+12479a...@syzkaller.appspotmail.com

Tested on:

commit: ce7f1a98 Add linux-next specific files for 20250923
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13182142580000

kernel config: https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e
dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

patch: https://syzkaller.appspot.com/x/patch.diff?x=108c8f12580000

Note: testing is done by a robot and is best-effort only.

[Edward Adam Davis]

#syz test

diff --git a/security/landlock/fs.c b/security/landlock/fs.c
index 4ed997f4a663..a18d53507210 100644
--- a/security/landlock/fs.c
+++ b/security/landlock/fs.c
@@ -1484,7 +1484,6 @@ static void hook_sb_delete(struct super_block *const sb)

* previous loop walk, which is not needed anymore.

[Edward Adam Davis]

diff --git a/kernel/fork.c b/kernel/fork.c
index e9a7fb5c3e49..a0b8eeeb1d27 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2349,7 +2349,7 @@ __latent_entropy struct task_struct *copy_process(
if (need_futex_hash_allocate_default(clone_flags)) {
retval = futex_hash_allocate_default();
if (retval)
- goto bad_fork_core_free;
+ goto bad_fork_cancel_cgroup;
/*
* If we fail beyond this point we don't free the allocated
* futex hash map. We assume that another thread will be created

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
BUG: sleeping function called from invalid context in hook_sb_delete

BUG: sleeping function called from invalid context at fs/inode.c:1928

in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6514, name: syz.0.17

preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0

2 locks held by syz.0.17/6514:
#0: ffff8880306a20e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff8880306a20e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff8880306a20e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffff8880306a2998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#1: ffff8880306a2998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: hook_sb_delete+0xae/0xbc0 security/landlock/fs.c:1405

Preemption disabled at:
[<0000000000000000>] 0x0

CPU: 1 UID: 0 PID: 6514 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
__might_resched+0x495/0x610 kernel/sched/core.c:8960
iput+0x2b/0xc50 fs/inode.c:1928

hook_sb_delete+0x6b7/0xbc0 security/landlock/fs.c:1468

security_sb_delete+0x80/0x150 security/security.c:1467
generic_shutdown_super+0xaa/0x2c0 fs/super.c:634
kill_anon_super fs/super.c:1281 [inline]
kill_litter_super+0x76/0xb0 fs/super.c:1291
deactivate_locked_super+0xbc/0x130 fs/super.c:473
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1327
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f

RIP: 0033:0x7fe6d878eec9

Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48

RSP: 002b:00007fe6d961c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe6d89e5fa0 RCX: 00007fe6d878eec9

RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000002c0

RBP: 00007fe6d8811f91 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

R13: 00007fe6d89e6038 R14: 00007fe6d89e5fa0 R15: 00007ffc5011e858
</TASK>

Tested on:

commit: ce7f1a98 Add linux-next specific files for 20250923
git tree: linux-next

console output: https://syzkaller.appspot.com/x/log.txt?x=128f94e2580000

kernel config: https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e
dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

patch: https://syzkaller.appspot.com/x/patch.diff?x=14e2cce2580000

[Edward Adam Davis]

#syz test: none

[syzbot]

> #syz test: none

want either no args or 2 args (repo, branch), got 1

>

[Davis Edward Adam]

#syz test: none

[syzbot]

> #syz test: none

"none" does not look like a valid git repo address.

>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-bugs" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-bug...@googlegroups.com.
> To view this discussion visit https://groups.google.com/d/msgid/syzkaller-bugs/4f6e21b7-3c0d-4f99-bf3a-3f20fafa9591n%40googlegroups.com.

[Jan Kara]

Hello!

Added Landlock guys to CC since this is a bug in Landlock.

On Tue 23-09-25 15:59:37, syzbot wrote:
> syzbot found the following issue on:
>
> HEAD commit: ce7f1a983b07 Add linux-next specific files for 20250923
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=118724e2580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e
> dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1376e27c580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136e78e2580000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/c30be6f36c31/disk-ce7f1a98.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/ae9ea347d4d8/vmlinux-ce7f1a98.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/d59682a4f33c/bzImage-ce7f1a98.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+12479a...@syzkaller.appspotmail.com
>
> BUG: sleeping function called from invalid context at fs/inode.c:1928

The first catch from the new might_sleep() annotations in iput().

> in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6028, name: syz.0.17
> preempt_count: 1, expected: 0
> RCU nest depth: 0, expected: 0
> 2 locks held by syz.0.17/6028:
> #0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
> #0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
> #0: ffff8880326bc0e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
> #1: ffff8880326bc998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
> #1: ffff8880326bc998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: hook_sb_delete+0xae/0xbd0 security/landlock/fs.c:1405
> Preemption disabled at:
> [<0000000000000000>] 0x0
> CPU: 0 UID: 0 PID: 6028 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
> Call Trace:
> <TASK>
> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
> __might_resched+0x495/0x610 kernel/sched/core.c:8960
> iput+0x2b/0xc50 fs/inode.c:1928
> hook_sb_delete+0x6b5/0xbd0 security/landlock/fs.c:1468

Indeed looks like a bug because we can call iput() while holding
sb->s_inode_list_lock in one case in hook_sb_delete().

Honza

--
Jan Kara <ja...@suse.com>
SUSE Labs, CR

[syzbot]

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:

BUG: sleeping function called from invalid context in hook_sb_delete

BUG: sleeping function called from invalid context at fs/inode.c:1928

in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 6483, name: syz.0.17

preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0

2 locks held by syz.0.17/6483:
#0: ffff888028f400e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline]
#0: ffff888028f400e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
#0: ffff888028f400e0 (&type->s_umount_key#48){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:505
#1: ffff888028f40998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#1: ffff888028f40998 (&s->s_inode_list_lock){+.+.}-{3:3}, at: hook_sb_delete+0xae/0xbc0 security/landlock/fs.c:1405

Preemption disabled at:
[<0000000000000000>] 0x0

CPU: 0 UID: 0 PID: 6483 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
__might_resched+0x495/0x610 kernel/sched/core.c:8960
iput+0x2b/0xc50 fs/inode.c:1928

hook_sb_delete+0x6b7/0xbc0 security/landlock/fs.c:1468

security_sb_delete+0x80/0x150 security/security.c:1467
generic_shutdown_super+0xaa/0x2c0 fs/super.c:634
kill_anon_super fs/super.c:1281 [inline]
kill_litter_super+0x76/0xb0 fs/super.c:1291
deactivate_locked_super+0xbc/0x130 fs/super.c:473
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1327
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f

RIP: 0033:0x7f8b7e78eec9

Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48

RSP: 002b:00007f8b7f714038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f8b7e9e5fa0 RCX: 00007f8b7e78eec9

RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00002000000002c0

RBP: 00007f8b7e811f91 R08: 0000000000000000 R09: 0000000000000000

R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000

R13: 00007f8b7e9e6038 R14: 00007f8b7e9e5fa0 R15: 00007ffe75b4a848
</TASK>


Tested on:

commit: ce7f1a98 Add linux-next specific files for 20250923
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13644f12580000

kernel config: https://syzkaller.appspot.com/x/.config?x=1be6fa3d47bce66e
dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

patch: https://syzkaller.appspot.com/x/patch.diff?x=11724d34580000

[Christian Brauner]

Very nice that the annotations help finding this!

[syzbot]

syzbot has bisected this issue to:

commit 2ef435a872abc347dc0a92f1c213bb0af3cbf195
Author: Max Kellermann <max.kel...@ionos.com>
Date: Wed Sep 17 15:36:31 2025 +0000

fs: add might_sleep() annotation to iput() and more

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1092ba7c580000
start commit: 7c3ba4249a36 Add linux-next specific files for 20251008
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=1292ba7c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=1492ba7c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=fa7a95b14b1eaa
dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12280dcd980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111d852f980000

Reported-by: syzbot+12479a...@syzkaller.appspotmail.com
Fixes: 2ef435a872ab ("fs: add might_sleep() annotation to iput() and more")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

[Tingmao Wang]

#syz test

diff --git a/fs/inode.c b/fs/inode.c
index 1396f79b2551..b28a61978d88 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -812,6 +812,8 @@ static void evict(struct inode *inode)
{
const struct super_operations *op = inode->i_sb->s_op;

+ might_sleep();
+
BUG_ON(!(inode_state_read_once(inode) & I_FREEING));
BUG_ON(!list_empty(&inode->i_lru));

@@ -1968,7 +1970,6 @@ static void iput_final(struct inode *inode)
*/
void iput(struct inode *inode)
{
- might_sleep();
if (unlikely(!inode))
return;

[syzbot]

For archival purposes, forwarding an incoming command email to
linux-...@vger.kernel.org, syzkall...@googlegroups.com.

***

Subject: [PATCH v1] fs: Move might_sleep() annotation to iput_final()
Author: m...@digikod.net

iput() don't directly call any sleepable code but mostly checks flags
and decrement a reference counter before calling iput_final() and then
evict().

Some code might call iput() with guarantees that iput_final() will not
be called. This is the case for Landlock's hook_sb_delete() where the
inode counter must de decremented while holding it with another
reference, see comment above the first iput() call.

Move the new might_sleep() call from iput() to iput_final(). The
alternative would be to manually decrement the counter without calling
iput(), but it doesn't seem right.

Cc: Christian Brauner <bra...@kernel.org>
Cc: Edward Adam Davis <ead...@qq.com>
Cc: Günther Noack <gno...@google.com>
Cc: Hillf Danton <hda...@sina.com>
Cc: Jan Kara <ja...@suse.cz>
Cc: Jann Horn <ja...@google.com>
Cc: Mateusz Guzik <mjg...@gmail.com>
Cc: Max Kellermann <max.kel...@ionos.com>
Cc: Tingmao Wang <m...@maowtm.org>
Reported-by: syzbot+12479a...@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/68d32659.a70a02...@google.com/

Fixes: 2ef435a872ab ("fs: add might_sleep() annotation to iput() and more")

Signed-off-by: Mickaël Salaün <m...@digikod.net>
---

From hook_sb_delete():

/*

* At this point, we own the ihold() reference that was

* originally set up by get_inode_object() and the

* __iget() reference that we just set in this loop

* walk. Therefore the following call to iput() will

* not sleep nor drop the inode because there is now at

* least two references to it.

*/
iput(inode);

#syz test

---
fs/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/inode.c b/fs/inode.c
index 84f539497857..64120cb21e8b 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1917,6 +1917,7 @@ static void iput_final(struct inode *inode)

const struct super_operations *op = inode->i_sb->s_op;

int drop;

+ might_sleep();
WARN_ON(inode_state_read(inode) & I_NEW);
VFS_BUG_ON_INODE(atomic_read(&inode->i_count) != 0, inode);

@@ -1969,7 +1970,6 @@ static void iput_final(struct inode *inode)

*/
void iput(struct inode *inode)
{
- might_sleep();
if (unlikely(!inode))
return;

--
2.51.0

[syzbot]

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

f
[ 104.167925][ T5820] ? clear_bhb_loop+0x60/0xb0
[ 104.167948][ T5820] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 104.167967][ T5820] RIP: 0033:0x7f9a9fef16c5
[ 104.167983][ T5820] Code: Unable to access opcode bytes at 0x7f9a9fef169b.
[ 104.167993][ T5820] RSP: 002b:00007fff0fc3e0f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[ 104.168021][ T5820] RAX: ffffffffffffffda RBX: 00005583ec761b10 RCX: 00007f9a9fef16c5
[ 104.168036][ T5820] RDX: 00000000000000e7 RSI: fffffffffffffe68 RDI: 0000000000000000
[ 104.168048][ T5820] RBP: 00005583ec738910 R08: 0000000000000000 R09: 0000000000000000
[ 104.168060][ T5820] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 104.168071][ T5820] R13: 00007fff0fc3e140 R14: 0000000000000000 R15: 0000000000000000
[ 104.168101][ T5820] </TASK>
2025/11/05 20:54:56 parsed 1 programs
[ 105.509351][ T5829] BUG: sleeping function called from invalid context at fs/inode.c:1920
[ 105.518601][ T5829] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5829, name: syz-execprog
[ 105.528439][ T5829] preempt_count: 1, expected: 0
[ 105.533521][ T5829] RCU nest depth: 0, expected: 0
[ 105.538811][ T5829] 1 lock held by syz-execprog/5829:
[ 105.544194][ T5829] #0: ffff88807e6f68d8 (&sb->s_type->i_lock_key#9){+.+.}-{3:3}, at: iput+0x2db/0x1050
[ 105.554222][ T5829] Preemption disabled at:
[ 105.554232][ T5829] [<0000000000000000>] 0x0
[ 105.564065][ T5829] CPU: 0 UID: 0 PID: 5829 Comm: syz-execprog Tainted: G W syzkaller #0 PREEMPT(full)
[ 105.564091][ T5829] Tainted: [W]=WARN
[ 105.564096][ T5829] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[ 105.564105][ T5829] Call Trace:
[ 105.564114][ T5829] <TASK>
[ 105.564121][ T5829] dump_stack_lvl+0x189/0x250
[ 105.564144][ T5829] ? __pfx_dump_stack_lvl+0x10/0x10
[ 105.564160][ T5829] ? __pfx__printk+0x10/0x10
[ 105.564176][ T5829] ? call_rcu+0x6ff/0x9c0
[ 105.564197][ T5829] ? print_lock_name+0xde/0x100
[ 105.564218][ T5829] __might_resched+0x495/0x610
[ 105.564241][ T5829] ? __pfx___might_resched+0x10/0x10
[ 105.564258][ T5829] ? do_raw_spin_lock+0x121/0x290
[ 105.564286][ T5829] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 105.564320][ T5829] iput+0x741/0x1050
[ 105.564352][ T5829] __dentry_kill+0x209/0x660
[ 105.564371][ T5829] ? dput+0x37/0x2b0
[ 105.564389][ T5829] dput+0x19f/0x2b0
[ 105.564406][ T5829] __fput+0x68e/0xa70
[ 105.564431][ T5829] fput_close_sync+0x113/0x220
[ 105.564450][ T5829] ? __pfx_fput_close_sync+0x10/0x10
[ 105.564470][ T5829] ? do_raw_spin_unlock+0x122/0x240
[ 105.564495][ T5829] __x64_sys_close+0x7f/0x110
[ 105.564517][ T5829] do_syscall_64+0xfa/0xfa0
[ 105.564541][ T5829] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 105.564558][ T5829] ? clear_bhb_loop+0x60/0xb0
[ 105.564577][ T5829] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 105.564593][ T5829] RIP: 0033:0x40dd0e
[ 105.564610][ T5829] Code: 24 28 44 8b 44 24 2c e9 70 ff ff ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48
[ 105.564625][ T5829] RSP: 002b:000000c002db1760 EFLAGS: 00000212 ORIG_RAX: 0000000000000003
[ 105.564688][ T5829] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000040dd0e
[ 105.564701][ T5829] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[ 105.564711][ T5829] RBP: 000000c002db17a0 R08: 0000000000000000 R09: 0000000000000000
[ 105.564723][ T5829] R10: 0000000000000000 R11: 0000000000000212 R12: 000000c002db18c0
[ 105.564735][ T5829] R13: 00000000000007ff R14: 000000c000002380 R15: 000000c0008937c0
[ 105.564765][ T5829] </TASK>
[ 107.337546][ T5837] BUG: sleeping function called from invalid context at fs/inode.c:1920
[ 107.347227][ T5837] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5837, name: dhcpcd
[ 107.356267][ T5837] preempt_count: 1, expected: 0
[ 107.361915][ T5837] RCU nest depth: 0, expected: 0
[ 107.367125][ T5837] 1 lock held by dhcpcd/5837:
[ 107.373083][ T5837] #0: ffff88807e6fa3d8 (&sb->s_type->i_lock_key#9){+.+.}-{3:3}, at: iput+0x2db/0x1050
[ 107.384068][ T5837] Preemption disabled at:
[ 107.384082][ T5837] [<0000000000000000>] 0x0
[ 107.393377][ T5837] CPU: 1 UID: 0 PID: 5837 Comm: dhcpcd Tainted: G W syzkaller #0 PREEMPT(full)
[ 107.393403][ T5837] Tainted: [W]=WARN
[ 107.393408][ T5837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[ 107.393417][ T5837] Call Trace:
[ 107.393424][ T5837] <TASK>
[ 107.393430][ T5837] dump_stack_lvl+0x189/0x250
[ 107.393456][ T5837] ? __pfx_dump_stack_lvl+0x10/0x10
[ 107.393480][ T5837] ? __pfx__printk+0x10/0x10
[ 107.393503][ T5837] ? print_lock_name+0xde/0x100
[ 107.393526][ T5837] __might_resched+0x495/0x610
[ 107.393553][ T5837] ? __pfx___might_resched+0x10/0x10
[ 107.393570][ T5837] ? do_raw_spin_lock+0x121/0x290
[ 107.393597][ T5837] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 107.393632][ T5837] iput+0x741/0x1050
[ 107.393662][ T5837] __dentry_kill+0x209/0x660
[ 107.393681][ T5837] ? dput+0x37/0x2b0
[ 107.393699][ T5837] dput+0x19f/0x2b0
[ 107.393717][ T5837] __fput+0x68e/0xa70
[ 107.393749][ T5837] fput_close_sync+0x113/0x220
[ 107.393768][ T5837] ? __pfx_fput_close_sync+0x10/0x10
[ 107.393790][ T5837] ? do_raw_spin_unlock+0x122/0x240
[ 107.393819][ T5837] __x64_sys_close+0x7f/0x110
[ 107.393843][ T5837] do_syscall_64+0xfa/0xfa0
[ 107.393871][ T5837] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 107.393890][ T5837] ? clear_bhb_loop+0x60/0xb0
[ 107.393915][ T5837] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 107.393933][ T5837] RIP: 0033:0x7fc58c16c407
[ 107.393950][ T5837] Code: 48 89 fa 4c 89 df e8 38 aa 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
[ 107.393968][ T5837] RSP: 002b:00007ffc1197cc80 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[ 107.393988][ T5837] RAX: ffffffffffffffda RBX: 00007fc58c0e2740 RCX: 00007fc58c16c407
[ 107.394002][ T5837] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
[ 107.394014][ T5837] RBP: 000055fc7ab074b0 R08: 0000000000000000 R09: 0000000000000000
[ 107.394026][ T5837] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
[ 107.394038][ T5837] R13: 000055fc83902290 R14: 0000000000000000 R15: 000055fc7ab1cac0
[ 107.394071][ T5837] </TASK>
[ 108.750656][ T5835] cgroup: Unknown subsys name 'net'
[ 108.759273][ T5835] BUG: sleeping function called from invalid context at fs/inode.c:1920
[ 108.769492][ T5835] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5835, name: syz-executor
[ 108.782190][ T5835] preempt_count: 1, expected: 0
[ 108.787683][ T5835] RCU nest depth: 0, expected: 0
[ 108.792976][ T5835] 2 locks held by syz-executor/5835:
[ 108.799370][ T5835] #0: ffff8880340e80e0 (&type->s_umount_key#44){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
[ 108.811870][ T5835] #1: ffff888077e41970 (&sb->s_type->i_lock_key#33){+.+.}-{3:3}, at: iput+0x2db/0x1050
[ 108.822811][ T5835] Preemption disabled at:
[ 108.822824][ T5835] [<0000000000000000>] 0x0
[ 108.833460][ T5835] CPU: 1 UID: 0 PID: 5835 Comm: syz-executor Tainted: G W syzkaller #0 PREEMPT(full)
[ 108.833488][ T5835] Tainted: [W]=WARN
[ 108.833493][ T5835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[ 108.833502][ T5835] Call Trace:
[ 108.833508][ T5835] <TASK>
[ 108.833515][ T5835] dump_stack_lvl+0x189/0x250
[ 108.833542][ T5835] ? __pfx_dump_stack_lvl+0x10/0x10
[ 108.833561][ T5835] ? __pfx__printk+0x10/0x10
[ 108.833580][ T5835] ? print_lock_name+0xde/0x100
[ 108.833601][ T5835] __might_resched+0x495/0x610
[ 108.833625][ T5835] ? __pfx___might_resched+0x10/0x10
[ 108.833642][ T5835] ? do_raw_spin_lock+0x121/0x290
[ 108.833666][ T5835] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 108.833699][ T5835] iput+0x741/0x1050
[ 108.833731][ T5835] __dentry_kill+0x209/0x660
[ 108.833751][ T5835] ? dput+0x37/0x2b0
[ 108.833770][ T5835] dput+0x19f/0x2b0
[ 108.833789][ T5835] shrink_dcache_for_umount+0xa0/0x170
[ 108.833815][ T5835] generic_shutdown_super+0x67/0x2c0
[ 108.833843][ T5835] kill_anon_super+0x3b/0x70
[ 108.833868][ T5835] kernfs_kill_sb+0x161/0x180
[ 108.833895][ T5835] deactivate_locked_super+0xbc/0x130
[ 108.833920][ T5835] cleanup_mnt+0x425/0x4c0
[ 108.833943][ T5835] ? lockdep_hardirqs_on+0x9c/0x150
[ 108.833970][ T5835] task_work_run+0x1d4/0x260
[ 108.833998][ T5835] ? __pfx_task_work_run+0x10/0x10
[ 108.834027][ T5835] ? exit_to_user_mode_loop+0x55/0x4f0
[ 108.834058][ T5835] exit_to_user_mode_loop+0xff/0x4f0
[ 108.834084][ T5835] ? rcu_is_watching+0x15/0xb0
[ 108.834109][ T5835] do_syscall_64+0x2e9/0xfa0
[ 108.834135][ T5835] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 108.834152][ T5835] ? clear_bhb_loop+0x60/0xb0
[ 108.834175][ T5835] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 108.834192][ T5835] RIP: 0033:0x7f2c235901f7
[ 108.834208][ T5835] Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
[ 108.834224][ T5835] RSP: 002b:00007ffeee90f4f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 108.834244][ T5835] RAX: 0000000000000000 RBX: 00007ffeee90f5f0 RCX: 00007f2c235901f7
[ 108.834256][ T5835] RDX: 00007f2c23623d15 RSI: 0000000000000000 RDI: 00007f2c236125ca
[ 108.834266][ T5835] RBP: 00007f2c236125ca R08: 00007f2c236128ae R09: 0000000000000000
[ 108.834277][ T5835] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2c23612844
[ 108.834287][ T5835] R13: 00007f2c23623d15 R14: 00007ffeee90f608 R15: 00007ffeee90f500
[ 108.834313][ T5835] </TASK>
[ 109.214905][ T5835] cgroup: Unknown subsys name 'cpuset'
[ 109.226104][ T5835] cgroup: Unknown subsys name 'rlimit'
[ 110.666383][ T5835] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 110.845546][ T5195] BUG: sleeping function called from invalid context at fs/inode.c:1920
[ 110.854984][ T5195] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5195, name: udevd
[ 110.865089][ T5195] preempt_count: 1, expected: 0
[ 110.870130][ T5195] RCU nest depth: 0, expected: 0
[ 110.875858][ T5195] 2 locks held by udevd/5195:
[ 110.881834][ T5195] #0: ffff88802feb6420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
[ 110.893073][ T5195] #1: ffff8880306928e8 (&sb->s_type->i_lock_key){+.+.}-{3:3}, at: iput+0x2db/0x1050
[ 110.903490][ T5195] Preemption disabled at:
[ 110.903505][ T5195] [<0000000000000000>] 0x0
[ 110.912829][ T5195] CPU: 1 UID: 0 PID: 5195 Comm: udevd Tainted: G W syzkaller #0 PREEMPT(full)
[ 110.912861][ T5195] Tainted: [W]=WARN
[ 110.912867][ T5195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
[ 110.912878][ T5195] Call Trace:
[ 110.912886][ T5195] <TASK>
[ 110.912894][ T5195] dump_stack_lvl+0x189/0x250
[ 110.912924][ T5195] ? __pfx_dump_stack_lvl+0x10/0x10
[ 110.912946][ T5195] ? __pfx__printk+0x10/0x10
[ 110.912969][ T5195] ? print_lock_name+0xde/0x100
[ 110.912994][ T5195] __might_resched+0x495/0x610
[ 110.913020][ T5195] ? __pfx___might_resched+0x10/0x10
[ 110.913036][ T5195] ? do_raw_spin_lock+0x121/0x290
[ 110.913063][ T5195] ? __pfx_do_raw_spin_lock+0x10/0x10
[ 110.913095][ T5195] iput+0x741/0x1050
[ 110.913122][ T5195] do_unlinkat+0x39f/0x560
[ 110.913155][ T5195] ? __pfx_do_unlinkat+0x10/0x10
[ 110.913182][ T5195] ? strncpy_from_user+0x150/0x2c0
[ 110.913209][ T5195] ? getname_flags+0x1e5/0x540
[ 110.913232][ T5195] __x64_sys_unlink+0x47/0x50
[ 110.913267][ T5195] do_syscall_64+0xfa/0xfa0
[ 110.913295][ T5195] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 110.913313][ T5195] ? clear_bhb_loop+0x60/0xb0
[ 110.913335][ T5195] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 110.913354][ T5195] RIP: 0033:0x7f9a9ff15937
[ 110.913371][ T5195] Code: 00 00 e9 a9 fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 5f 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 91 b4 0d 00 f7 d8 64 89 02 b8
[ 110.913387][ T5195] RSP: 002b:00007fff0fc3e2a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
[ 110.913408][ T5195] RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007f9a9ff15937
[ 110.913422][ T5195] RDX: ffffffffffffffff RSI: 000000000000000b RDI: 00005583c5bc802e
[ 110.913434][ T5195] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[ 110.913445][ T5195] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
[ 110.913456][ T5195] R13: 00005583c5be3100 R14: 0000000000000000 R15: 0000000000000000
[ 110.913486][ T5195] </TASK>


syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build2124321294=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.24.4'
GOWORK=''
PKG_CONFIG='pkg-config'

git status (err=<nil>)
HEAD detached at 7e2882b3269
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=7e2882b32698b70f3149aee00c41e3d2d941dca3 -X github.com/google/syzkaller/prog.gitRevisionDate=20251007-152513" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=7e2882b32698b70f3149aee00c41e3d2d941dca3 -X github.com/google/syzkaller/prog.gitRevisionDate=20251007-152513" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=7e2882b32698b70f3149aee00c41e3d2d941dca3 -X github.com/google/syzkaller/prog.gitRevisionDate=20251007-152513" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"7e2882b32698b70f3149aee00c41e3d2d941dca3\"
/usr/bin/ld: /tmp/ccT2jI60.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null


Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=11651084580000


Tested on:

commit: 84d39fb9 Add linux-next specific files for 20251105
git tree: linux-next
kernel config: https://syzkaller.appspot.com/x/.config?x=bebc0cb9c2989b81

dashboard link: https://syzkaller.appspot.com/bug?extid=12479ae15958fc3f54ec
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8

patch: https://syzkaller.appspot.com/x/patch.diff?x=139f532f980000