Hello,
syzbot found the following crash on:
HEAD commit: cd77006e Merge tag 'hyperv-fixes-signed' of git://git.kern..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=12caf66d100000
kernel config:
https://syzkaller.appspot.com/x/.config?x=ef2c2e4f6006998c
dashboard link:
https://syzkaller.appspot.com/bug?extid=b78e49ce893d7135602d
compiler: clang version 11.0.0 (
https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b)
CC: [
adilger...@dilger.ca linux...@vger.kernel.org linux-...@vger.kernel.org ty...@mit.edu]
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by:
syzbot+b78e49...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in ext4_mark_iloc_dirty / find_inode_bit
write to 0xffff8880aaae4914 of 4 bytes by task 24496 on cpu 1:
ext4_do_update_inode fs/ext4/inode.c:5012 [inline]
ext4_mark_iloc_dirty+0x73b/0x1660 fs/ext4/inode.c:5624
__ext4_mark_inode_dirty+0x448/0x630 fs/ext4/inode.c:5818
ext4_ext_tree_init+0x7e/0x90 fs/ext4/extents.c:834
__ext4_new_inode+0x2990/0x2fc0 fs/ext4/ialloc.c:1184
ext4_symlink+0x354/0x7e0 fs/ext4/namei.c:3303
vfs_symlink+0x218/0x2f0 fs/namei.c:3953
do_symlinkat+0xee/0x280 fs/namei.c:3980
__do_sys_symlink fs/namei.c:3999 [inline]
__se_sys_symlink fs/namei.c:3997 [inline]
__x64_sys_symlink+0x32/0x40 fs/namei.c:3997
do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
read to 0xffff8880aaae4914 of 4 bytes by task 24500 on cpu 0:
recently_deleted fs/ext4/ialloc.c:698 [inline]
find_inode_bit+0x227/0x3a0 fs/ext4/ialloc.c:724
__ext4_new_inode+0xc84/0x2fc0 fs/ext4/ialloc.c:927
ext4_symlink+0x354/0x7e0 fs/ext4/namei.c:3303
vfs_symlink+0x218/0x2f0 fs/namei.c:3953
do_symlinkat+0xee/0x280 fs/namei.c:3980
__do_sys_symlink fs/namei.c:3999 [inline]
__se_sys_symlink fs/namei.c:3997 [inline]
__x64_sys_symlink+0x32/0x40 fs/namei.c:3997
do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:359
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 24500 Comm: syz-executor.1 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
---
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