[v5.15] BUG: sleeping function called from invalid context in console_lock

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 1fe619a7d252 Linux 5.15.113
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=104edb05280000
kernel config: https://syzkaller.appspot.com/x/.config?x=ab36330fd14820aa
dashboard link: https://syzkaller.appspot.com/bug?extid=028ba6e331e656006d3e
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/2d1716ac5a07/disk-1fe619a7.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9e9e3ef13603/vmlinux-1fe619a7.xz
kernel image: https://storage.googleapis.com/syzbot-assets/810a025eede3/bzImage-1fe619a7.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+028ba6...@syzkaller.appspotmail.com

device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
BUG: sleeping function called from invalid context at kernel/printk/printk.c:2545
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 29084, name: syz-executor.2
3 locks held by syz-executor.2/29084:
#0: ffff88804851d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88804851d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline]
#1: ffff88804851d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline]
#1: ffff88804851d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x24f/0x920 drivers/tty/tty_io.c:1110
#2: ffff88801a450398 (&gsm->tx_lock){....}-{2:2}, at: gsmld_write+0x5b/0x120 drivers/tty/n_gsm.c:2925
irq event stamp: 2862
hardirqs last enabled at (2861): [<ffffffff8a1ab3ae>] syscall_enter_from_user_mode+0x2e/0x230 kernel/entry/common.c:107
hardirqs last disabled at (2862): [<ffffffff8a24061c>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (2862): [<ffffffff8a24061c>] _raw_spin_lock_irqsave+0xac/0x120 kernel/locking/spinlock.c:162
softirqs last enabled at (2766): [<ffffffff883831f9>] neightbl_fill_param_info net/core/neighbour.c:2181 [inline]
softirqs last enabled at (2766): [<ffffffff883831f9>] neightbl_dump_info+0x1f09/0x2210 net/core/neighbour.c:2440
softirqs last disabled at (2764): [<ffffffff883826f8>] neightbl_fill_param_info net/core/neighbour.c:2168 [inline]
softirqs last disabled at (2764): [<ffffffff883826f8>] neightbl_dump_info+0x1408/0x2210 net/core/neighbour.c:2440
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 0 PID: 29084 Comm: syz-executor.2 Not tainted 5.15.113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/16/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
___might_sleep+0x547/0x6a0 kernel/sched/core.c:9625
console_lock+0x18/0x70 kernel/printk/printk.c:2545
do_con_write+0x110/0x7270 drivers/tty/vt/vt.c:2908
con_write+0x20/0x40 drivers/tty/vt/vt.c:3295
gsmld_write+0xf9/0x120 drivers/tty/n_gsm.c:2928
do_tty_write drivers/tty/tty_io.c:1038 [inline]
file_tty_write+0x561/0x920 drivers/tty/tty_io.c:1110
call_write_iter include/linux/fs.h:2103 [inline]
new_sync_write fs/read_write.c:507 [inline]
vfs_write+0xacf/0xe50 fs/read_write.c:594
ksys_write+0x1a2/0x2c0 fs/read_write.c:647
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f6bcad54169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6bc92c6168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6bcae73f80 RCX: 00007f6bcad54169
RDX: 00000000fffffde3 RSI: 00000000200007c0 RDI: 0000000000000003
RBP: 00007f6bcadafca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe919f915f R14: 00007f6bc92c6300 R15: 0000000000022000
</TASK>
BUG: scheduling while atomic: syz-executor.2/29084/0x00000002
3 locks held by syz-executor.2/29084:
#0: ffff88804851d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffff88804851d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: tty_write_lock drivers/tty/tty_io.c:961 [inline]
#1: ffff88804851d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: do_tty_write drivers/tty/tty_io.c:984 [inline]
#1: ffff88804851d130 (&tty->atomic_write_lock){+.+.}-{3:3}, at: file_tty_write+0x24f/0x920 drivers/tty/tty_io.c:1110
#2: ffff88801a450398 (&gsm->tx_lock){+.+.}-{2:2}, at: gsmld_write+0x5b/0x120 drivers/tty/n_gsm.c:2925
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.