WARNING: stack going in the wrong direction? at finish_task

WARNING: stack going in the wrong direction? at finish_task_switch.isra.NUM

Status: internal: reported on 2023/02/18 21:02
Labels: kernel (incorrect?)
Fix commit: 00c8f01c4e84 objtool: Fix ORC 'signal' propagation
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 99d, last: 98d

Sample crash report:

WARNING: stack going in the wrong direction? at raw_spin_rq_unlock_irq kernel/sched/sched.h:1377 [inline]
WARNING: stack going in the wrong direction? at finish_lock_switch kernel/sched/core.c:5062 [inline]
WARNING: stack going in the wrong direction? at finish_task_switch.isra.0+0x2b0/0xc80 kernel/sched/core.c:5181

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets	Manager	Title
2023/02/20 04:27	linux-next	c068f40300a0	bcdf85f8	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	WARNING: stack going in the wrong direction? at finish_task_switch.isra.NUM
2023/02/18 21:02	linux-next	c068f40300a0	bcdf85f8	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	WARNING: stack going in the wrong direction? at finish_task_switch.isra.NUM

* ~~Struck through~~ repros no longer work on HEAD.