syzbot

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WARNING: CPU: 0 PID: 6595 at include/linux/sched/signal.h:548 restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline]
WARNING: CPU: 0 PID: 6595 at include/linux/sched/signal.h:548 poll_select_finish+0x71c/0x7e0 fs/select.c:301
Modules linked in:
CPU: 0 UID: 0 PID: 6595 Comm: syz.0.15 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline]
pc : poll_select_finish+0x71c/0x7e0 fs/select.c:301
lr : restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline]
lr : poll_select_finish+0x71c/0x7e0 fs/select.c:301
sp : ffff8000a02e7b20
x29: ffff8000a02e7c20 x28: dfff800000000000 x27: 0000000000000000
x26: ffff70001405cf6c x25: 0000000000000002 x24: ffff8000a02e7ce0
x23: 0000000000000008 x22: ffff8000a02e7ba0 x21: ffff0000d55cbc80
x20: 0000000000000008 x19: 00000000fffffdfe x18: 1fffe000366c6876
x17: ffff80008f81d000 x16: ffff80008b3edfc8 x15: 0000000000000002
x14: 1ffff0001405cf74 x13: 0000000000000000 x12: 0000000000000000
x11: ffff70001405cf76 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000d55cbc80 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000010
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline] (P)
 poll_select_finish+0x71c/0x7e0 fs/select.c:301 (P)
 restore_saved_sigmask_unless include/linux/sched/signal.h:548 [inline] (L)
 poll_select_finish+0x71c/0x7e0 fs/select.c:301 (L)
 __do_sys_ppoll fs/select.c:1122 [inline]
 __se_sys_ppoll fs/select.c:1101 [inline]
 __arm64_sys_ppoll+0x2d8/0x358 fs/select.c:1101
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
irq event stamp: 796
hardirqs last  enabled at (795): [<ffff80008b4b56a4>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline]
hardirqs last  enabled at (795): [<ffff80008b4b56a4>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95
hardirqs last disabled at (796): [<ffff80008b4b302c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488
softirqs last  enabled at (752): [<ffff80008002f3d8>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (750): [<ffff80008002f3a4>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---