Hello,
syzbot found the following issue on:
HEAD commit: 2bb25b3a Merge tag 'mips-fixes_5.12_3' of git://git.kernel..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=1476e611d00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=8d3029d8441055c8
dashboard link:
https://syzkaller.appspot.com/bug?extid=2d36aedecb5ce6dc3c93
compiler: Debian clang version 11.0.1-2
CC: [
Ja...@zx2c4.com da...@davemloft.net ku...@kernel.org linux-...@vger.kernel.org net...@vger.kernel.org wire...@lists.zx2c4.com]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+2d36ae...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in prandom_seed / prandom_u32
write to 0xffff88813bc28510 of 8 bytes by task 5 on cpu 0:
siprand_u32 lib/random32.c:372 [inline]
prandom_u32+0x104/0x1f0 lib/random32.c:387
prandom_u32_max include/linux/prandom.h:96 [inline]
wg_timers_data_sent+0x46/0x100 drivers/net/wireguard/timers.c:150
wg_packet_create_data_done drivers/net/wireguard/send.c:257 [inline]
wg_packet_tx_worker+0x1b4/0x360 drivers/net/wireguard/send.c:276
process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
worker_thread+0x616/0xa70 kernel/workqueue.c:2421
kthread+0x20b/0x230 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
read to 0xffff88813bc28510 of 8 bytes by task 19 on cpu 1:
prandom_seed+0xf5/0x270 lib/random32.c:441
addrconf_dad_begin net/ipv6/addrconf.c:3939 [inline]
addrconf_dad_work+0x258/0x1160 net/ipv6/addrconf.c:4064
process_one_work+0x3e1/0x950 kernel/workqueue.c:2275
worker_thread+0x616/0xa70 kernel/workqueue.c:2421
kthread+0x20b/0x230 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 5.12.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: ipv6_addrconf addrconf_dad_work
==================================================================
Bluetooth: hci1: command 0x041b tx timeout
Bluetooth: hci0: command 0x040f tx timeout
---
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