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WARNING: CPU: 1 PID: 8999 at drivers/tty/serial/serial_core.c:625 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
WARNING: CPU: 1 PID: 8999 at drivers/tty/serial/serial_core.c:625 uart_port_unlock_irqrestore include/linux/serial_core.h:669 [inline]
WARNING: CPU: 1 PID: 8999 at drivers/tty/serial/serial_core.c:625 uart_write+0x280/0x2ec drivers/tty/serial/serial_core.c:626
Modules linked in:
CPU: 1 PID: 8999 Comm: syz-executor.3 Tainted: G        W          6.10.0-rc3-syzkaller-gac2193b4b460 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
pstate: 804000c5 (Nzcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : uart_write+0x280/0x2ec include/linux/spinlock.h:406
lr : uart_write+0x278/0x2ec drivers/tty/serial/serial_core.c:625
sp : ffff80009a7c77a0
x29: ffff80009a7c77a0 x28: ffff0000fa3f40e8 x27: ffff0000fa3f40e0
x26: 0000000000000001 x25: dfff800000000000 x24: ffff0000c8e00f48
x23: 0000000000000000 x22: ffff800093dcec80 x21: ffff0000fa3f4210
x20: 0000000000000009 x19: ffff0000c8e00be8 x18: ffff80009a7c7440
x17: 0000000000040bbc x16: ffff800080350d3c x15: ffff7000134f8ed8
x14: 1ffff000134f8ed8 x13: 0000000000000004 x12: ffffffffffffffff
x11: 0000000000040000 x10: 0000000000003d34 x9 : ffff800098fd5000
x8 : 0000000000003d35 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff800092e8a120 x4 : 0000000000000008 x3 : ffff800080350e64
x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff800093dcec80
Call trace:
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 uart_port_unlock_irqrestore include/linux/serial_core.h:669 [inline]
 uart_write+0x280/0x2ec drivers/tty/serial/serial_core.c:626
 ppp_async_push+0x258/0x1608 drivers/net/ppp/ppp_async.c:666
 ppp_async_send+0xb0/0x114 drivers/net/ppp/ppp_async.c:634
 __ppp_channel_push+0xe0/0x1ac drivers/net/ppp/ppp_generic.c:2150
 ppp_channel_push+0x17c/0x208 drivers/net/ppp/ppp_generic.c:2177
 ppp_write+0x288/0x374 drivers/net/ppp/ppp_generic.c:525
 do_loop_readv_writev fs/read_write.c:764 [inline]
 vfs_writev+0x6c8/0xb80 fs/read_write.c:973
 do_pwritev fs/read_write.c:1072 [inline]
 __do_sys_pwritev fs/read_write.c:1119 [inline]
 __se_sys_pwritev fs/read_write.c:1114 [inline]
 __arm64_sys_pwritev+0x18c/0x29c fs/read_write.c:1114
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
irq event stamp: 2507
hardirqs last  enabled at (2506): [<ffff800080a62c08>] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234
hardirqs last disabled at (2507): [<ffff80008b1608a8>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (2507): [<ffff80008b1608a8>] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162
softirqs last  enabled at (2472): [<ffff8000800307e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (2488): [<ffff800085ceaf80>] ppp_channel_push+0x38/0x208 drivers/net/ppp/ppp_generic.c:2171
---[ end trace 0000000000000000 ]---