Hello, syzbot tried to test the proposed patch but build/boot failed: patch is already applied Tested on https://github.com/joelagnel/linux.git/test-ashmem commit 32f813bb0d06c1e189ac336f8c3c7377f85c71f0 (Wed Jan 24 01:45:04 2018 +0000) ashmem: Fix lockdep issue during llseek compiler: gcc (GCC) 7.1.1 20170620 Patch is attached.
--- a/drivers/staging/android/ashmem.c +++ b/drivers/staging/android/ashmem.c @@ -343,7 +343,9 @@ static loff_t ashmem_llseek(struct file *file, loff_t offset, int origin) goto out; } + mutex_unlock(&ashmem_mutex); ret = vfs_llseek(asma->file, offset, origin); + mutex_lock(&ashmem_mutex); if (ret < 0) goto out;
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