Hello,
syzbot found the following issue on:
HEAD commit: bdcf11de Merge tag 'riscv-for-linus-5.9-rc6' of git://git...
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=15aa0ac3900000
kernel config:
https://syzkaller.appspot.com/x/.config?x=71d95d75ec48fd6f
dashboard link:
https://syzkaller.appspot.com/bug?extid=162cca5cc31cf478f683
compiler: clang version 11.0.0 (
https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b)
CC: [
ak...@linux-foundation.org linux-...@vger.kernel.org linu...@kvack.org]
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+162cca...@syzkaller.appspotmail.com
loop4: p2 < >
ldm_parse_privhead(): Cannot find PRIVHEAD structure. LDM database is corrupt. Aborting.
ldm_validate_privheads(): Cannot find PRIVHEAD 1.
loop5: p2 < >
==================================================================
BUG: KCSAN: data-race in lru_add_drain_all / lru_cache_add
write to 0xffff88812c128ac0 of 1 bytes by task 26778 on cpu 1:
pagevec_add include/linux/pagevec.h:81 [inline]
lru_cache_add+0x92/0x180 mm/swap.c:472
lru_cache_add_inactive_or_unevictable+0x46/0x160 mm/swap.c:506
do_anonymous_page+0x9aa/0xf40 mm/memory.c:3400
handle_pte_fault mm/memory.c:4209 [inline]
__handle_mm_fault mm/memory.c:4346 [inline]
handle_mm_fault+0x14fd/0x1af0 mm/memory.c:4444
faultin_page mm/gup.c:878 [inline]
__get_user_pages+0xa3d/0x1010 mm/gup.c:1090
__get_user_pages_locked mm/gup.c:1273 [inline]
__get_user_pages_remote+0x100/0x500 mm/gup.c:1772
get_user_pages_remote+0x57/0x80 mm/gup.c:1849
get_arg_page fs/exec.c:220 [inline]
copy_string_kernel+0x174/0x370 fs/exec.c:631
kernel_execve+0x372/0x640 fs/exec.c:2067
call_usermodehelper_exec_async+0x17e/0x230 kernel/umh.c:101
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
read to 0xffff88812c128ac0 of 1 bytes by task 5079 on cpu 0:
pagevec_count include/linux/pagevec.h:68 [inline]
lru_add_drain_all+0x118/0x3b0 mm/swap.c:796
invalidate_bdev+0x50/0x70 fs/block_dev.c:96
blk_drop_partitions+0x5c/0x1e0 block/partitions/core.c:633
bdev_disk_changed+0x88/0x320 fs/block_dev.c:1392
blkdev_reread_part block/ioctl.c:103 [inline]
blkdev_common_ioctl+0xd00/0x10b0 block/ioctl.c:549
blkdev_ioctl+0x167/0x410 block/ioctl.c:618
block_ioctl+0x6d/0x80 fs/block_dev.c:1871
vfs_ioctl fs/ioctl.c:48 [inline]
__do_sys_ioctl fs/ioctl.c:753 [inline]
__se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739
__x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5079 Comm: systemd-udevd Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
---
This report is generated by a bot. It may contain errors.
See
https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at
syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.