Hello,
syzbot found the following issue on:
HEAD commit: bee0e7762ad2 Merge tag 'for-linus-iommufd' of git://
git.ke..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=17703bd2e80000
kernel config:
https://syzkaller.appspot.com/x/.config?x=ac34c1f29a8029df
dashboard link:
https://syzkaller.appspot.com/bug?extid=da595c5f98ac3cb3233f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [
fred...@kernel.org linux-...@vger.kernel.org mi...@kernel.org tg...@linutronix.de]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image:
https://storage.googleapis.com/syzbot-assets/233be5f65dd2/disk-bee0e776.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/94423738a289/vmlinux-bee0e776.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/0b977463fa9a/bzImage-bee0e776.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+da595c...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
write to 0xffffffff85f1a330 of 4 bytes by task 0 on cpu 0:
tick_nohz_stop_tick kernel/time/tick-sched.c:904 [inline]
tick_nohz_idle_stop_tick+0x1d8/0x760 kernel/time/tick-sched.c:1130
cpuidle_idle_call kernel/sched/idle.c:211 [inline]
do_idle+0x177/0x230 kernel/sched/idle.c:282
cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:380
rest_init+0xf3/0x100 init/main.c:730
arch_call_rest_init+0x9/0x10 init/main.c:827
start_kernel+0x57d/0x5d0 init/main.c:1072
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:555
x86_64_start_kernel+0x94/0xa0 arch/x86/kernel/head64.c:536
secondary_startup_64_no_verify+0x167/0x16b
read to 0xffffffff85f1a330 of 4 bytes by task 0 on cpu 1:
tick_nohz_next_event+0x1d1/0x290 kernel/time/tick-sched.c:869
tick_nohz_get_sleep_length+0x134/0x2c0 kernel/time/tick-sched.c:1261
menu_select+0x81a/0x1060 drivers/cpuidle/governors/menu.c:286
cpuidle_select+0x41/0x50 drivers/cpuidle/cpuidle.c:359
cpuidle_idle_call kernel/sched/idle.c:208 [inline]
do_idle+0x160/0x230 kernel/sched/idle.c:282
cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:380
start_secondary+0x82/0x90 arch/x86/kernel/smpboot.c:336
secondary_startup_64_no_verify+0x167/0x16b
value changed: 0x00000000 -> 0xffffffff
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
==================================================================
---
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