INFO: rcu detected stall in corrupted

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: d8414567 ANDROID: cuttlefish_defconfig: Enable CONFIG_FUSE..
git tree: android-4.14
console output: https://syzkaller.appspot.com/x/log.txt?x=164ad8e3200000
kernel config: https://syzkaller.appspot.com/x/.config?x=19963a41b6ae10e6
dashboard link: https://syzkaller.appspot.com/bug?extid=62869728bfd514161622
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1768c2dd200000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1178a29f200000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+628697...@syzkaller.appspotmail.com

hrtimer: interrupt took 27820 ns
INFO: rcu_preempt self-detected stall on CPU
0-...: (10499 ticks this GP) idle=84a/140000000000001/0 softirq=6165/6166
fqs=5232
(t=10500 jiffies g=2677 c=2676 q=174)
NMI backtrace for cpu 0
CPU: 0 PID: 3358 Comm: syz-executor389 Not tainted 4.14.111+ #51
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0xb9/0x10e lib/dump_stack.c:53
nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
</IRQ>
INFO: rcu_sched self-detected stall on CPU
0-...: (10463 ticks this GP) idle=84a/140000000000001/0 softirq=6166/6166
fqs=5215
(t=10500 jiffies g=1273 c=1272 q=6)
NMI backtrace for cpu 0
CPU: 0 PID: 3358 Comm: syz-executor389 Not tainted 4.14.111+ #51
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0xb9/0x10e lib/dump_stack.c:53
nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
</IRQ>


---
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[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 109a48ed ANDROID: zram: set comp_len to PAGE_SIZE when pag..
git tree: android-4.9
console output: https://syzkaller.appspot.com/x/log.txt?x=16faf225400000
kernel config: https://syzkaller.appspot.com/x/.config?x=13558268b29d9d4a
dashboard link: https://syzkaller.appspot.com/bug?extid=8ad7c86527f9055c6f77
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f56533400000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10671b0b400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:

Reported-by: syzbot+8ad7c8...@syzkaller.appspotmail.com

INFO: rcu_preempt detected stalls on CPUs/tasks:
Tasks blocked on level-0 rcu_node (CPUs 0-1): P2156
(detected by 1, t=10502 jiffies, g=396, c=395, q=3681)
syz-executor954 R running task 28232 2156 2154 0x00000000
ffff8801c9c3af80 ffff8801c9c4dd80 ffff8801c94d0580 ffff8801c9c017c0
ffff8801db621018 ffff8801c9b8fc78 ffffffff82806912 0000000000000046
0000000000000046 ffff8801c9c3af80 0100000000000000 ffff8801db6218f0
Call Trace:
[<ffffffff8280858f>] preempt_schedule_common+0x1f/0xd0
kernel/sched/core.c:3608
[<ffffffff82808665>] preempt_schedule+0x25/0x30 kernel/sched/core.c:3634
[<ffffffff810022b6>] ___preempt_schedule+0x16/0x18
[<ffffffff8116ce43>] __sched_setscheduler+0x1c63/0x2ca0
kernel/sched/core.c:4407
[<ffffffff8117addc>] sched_setattr kernel/sched/core.c:4449 [inline]
[<ffffffff8117addc>] SYSC_sched_setattr kernel/sched/core.c:4623 [inline]
[<ffffffff8117addc>] SyS_sched_setattr+0x24c/0x3c0 kernel/sched/core.c:4602
[<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
[<ffffffff82816b93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
syz-executor954 R running task 28232 2156 2154 0x00000000
ffff8801c9c3af80 ffff8801c9c4dd80 ffff8801c94d0580 ffff8801c9c017c0
ffff8801db621018 ffff8801c9b8fc78 ffffffff82806912 0000000000000046
0000000000000046 ffff8801c9c3af80 0100000000000000 ffff8801db6218f0
Call Trace:
[<ffffffff8280858f>] preempt_schedule_common+0x1f/0xd0
kernel/sched/core.c:3608
[<ffffffff82808665>] preempt_schedule+0x25/0x30 kernel/sched/core.c:3634
[<ffffffff810022b6>] ___preempt_schedule+0x16/0x18
[<ffffffff8116ce43>] __sched_setscheduler+0x1c63/0x2ca0
kernel/sched/core.c:4407
[<ffffffff8117addc>] sched_setattr kernel/sched/core.c:4449 [inline]
[<ffffffff8117addc>] SYSC_sched_setattr kernel/sched/core.c:4623 [inline]
[<ffffffff8117addc>] SyS_sched_setattr+0x24c/0x3c0 kernel/sched/core.c:4602
[<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
[<ffffffff82816b93>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb