INFO: task can't die in irqentry

INFO: task can't die in irqentry_exit (2)
Status: upstream: reported C repro on 2020/12/13 03:25
Reported-by: syzbot+b3c4057ecb552e754f4a@syzkaller.appspotmail.com
First crash: 128d, last: 16d

Cause bisection: failed (bisect log)

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task can't die in irqentry_exit				7	206d	225d	0/22	auto-closed as invalid on 2020/11/19 14:56

Sample crash report:

INFO: task syz-executor008:8537 can't die for more than 143 seconds.
task:syz-executor008 state:R  running task     stack:25184 pid: 8537 ppid:  8530 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x8eb/0x21b0 kernel/sched/core.c:5078
 blk_schedule_flush_plug include/linux/blkdev.h:1277 [inline]
 io_schedule_prepare kernel/sched/core.c:6820 [inline]
 io_schedule_timeout+0x140/0x140 kernel/sched/core.c:6839
 irqentry_exit_cond_resched kernel/entry/common.c:393 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:385 [inline]
 irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: ffffffff:0xffff888021e12490
RSP: 8b793a20:0000000000000000 EFLAGS: ffff888021e12490 ORIG_RAX: ffffffff89200c02
RAX: 0000000000000000 RBX: ffffffff8158844f RCX: ffff888021e11b00
RDX: 19f69e53c6670900 RSI: ffff888021e11b00 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8f51e7a7
R10: fffffbfff1ea3cf4 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000002 R15: ffffffff8b793a20
INFO: task syz-executor008:8668 can't die for more than 148 seconds.
task:syz-executor008 state:R  running task     stack:25272 pid: 8668 ppid:  8529 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x8eb/0x21b0 kernel/sched/core.c:5078
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5340
INFO: task syz-executor008:8762 can't die for more than 152 seconds.
task:syz-executor008 state:R  running task     stack:25000 pid: 8762 ppid:  8527 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x8eb/0x21b0 kernel/sched/core.c:5078

Crashes (9):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-linux-next-kasan-gce-root	2020/12/22 10:35	linux-next	6c3eb1b1	04201c06	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/12/13 03:24	linux-next	14240d4c	bca53db9	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2021/03/29 19:34	linux-next	93129492	6a81331a	.config	log	report			info	INFO: task can't die in irqentry_exit
ci-upstream-linux-next-kasan-gce-root	2021/01/19 08:31	linux-next	b4bb878f	63631df1	.config	log	report			info	INFO: task can't die in irqentry_exit
ci-upstream-linux-next-kasan-gce-root	2021/01/18 13:55	linux-next	93bf8b94	63631df1	.config	log	report			info	INFO: task can't die in irqentry_exit
ci-upstream-linux-next-kasan-gce-root	2021/01/05 16:28	linux-next	83dadd4c	a0234d98	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/12/25 05:42	linux-next	d7a03a44	c2c1d1dd	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/12/09 18:26	linux-next	a9e26cb5	c090b4da	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/12/07 23:40	linux-next	15ac8fdb	51a9082e	.config	log	report			info