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

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Message-ID: <670689a8.050a0220.67064.0045.GAE@google.com>
Date: Wed, 09 Oct 2024 06:48:24 -0700
From: syzbot <syzbot+02a127be2df04bdc5df0@...kaller.appspotmail.com>
To: clm@...com, dsterba@...e.com, josef@...icpanda.com, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] BUG: sleeping function called from invalid context
 in getname_kernel

Hello,

syzbot found the following issue on:

HEAD commit:    33ce24234fca Add linux-next specific files for 20241008
git tree:       linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=14771780580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4750ca93740b938d
dashboard link: https://syzkaller.appspot.com/bug?extid=02a127be2df04bdc5df0
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=112f97d0580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=101d4f9f980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ee8dc2df0c57/disk-33ce2423.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/dc473c0fa06e/vmlinux-33ce2423.xz
kernel image: https://storage.googleapis.com/syzbot-assets/4671f1ca2e61/bzImage-33ce2423.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/9876580e56ab/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+02a127be2df04bdc5df0@...kaller.appspotmail.com

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:330
in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 5233, name: udevd
preempt_count: 0, expected: 0
RCU nest depth: 1, expected: 0
INFO: lockdep is turned off.
CPU: 1 UID: 0 PID: 5233 Comm: udevd Not tainted 6.12.0-rc2-next-20241008-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 __might_resched+0x5d4/0x780 kernel/sched/core.c:8638
 might_alloc include/linux/sched/mm.h:330 [inline]
 slab_pre_alloc_hook mm/slub.c:4062 [inline]
 slab_alloc_node mm/slub.c:4140 [inline]
 kmem_cache_alloc_noprof+0x61/0x380 mm/slub.c:4167
 getname_kernel+0x59/0x2f0 fs/namei.c:234
 kern_path+0x1d/0x50 fs/namei.c:2716
 is_same_device fs/btrfs/volumes.c:812 [inline]
 device_list_add+0xc64/0x1ea0 fs/btrfs/volumes.c:947
 btrfs_scan_one_device+0xab5/0xd90 fs/btrfs/volumes.c:1538
 btrfs_control_ioctl+0x165/0x3e0 fs/btrfs/super.c:2264
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faa2bb1ad49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd55ec91e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa2bb1ad49
RDX: 00007ffd55ec91f8 RSI: 0000000090009427 RDI: 0000000000000009
RBP: 0000000000000009 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd55eca238 R14: 000055773bb412a0 R15: 00007ffd55ecaf58
 </TASK>


---
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