Hi Chao, I don't want to rebase old commit at this moment, so applied on top of the tree.
Thanks, On 03/25, Chao Yu wrote: > Unable to handle kernel NULL pointer dereference at virtual address 00000000 > PC is at f2fs_free_dic+0x60/0x2c8 > LR is at f2fs_decompress_pages+0x3c4/0x3e8 > f2fs_free_dic+0x60/0x2c8 > f2fs_decompress_pages+0x3c4/0x3e8 > __read_end_io+0x78/0x19c > f2fs_post_read_work+0x6c/0x94 > process_one_work+0x210/0x48c > worker_thread+0x2e8/0x44c > kthread+0x110/0x120 > ret_from_fork+0x10/0x18 > > In f2fs_free_dic(), we can not use f2fs_put_page(,1) to release > dic->tpages[i], > as the page's mapping is NULL. > > Signed-off-by: Chao Yu <yuch...@huawei.com> > --- > v2: > - fix to skip release tpages[i] if it is NULL in error path. > fs/f2fs/compress.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > index ef7dd04312fe..6e10800729b6 100644 > --- a/fs/f2fs/compress.c > +++ b/fs/f2fs/compress.c > @@ -1137,7 +1137,10 @@ void f2fs_free_dic(struct decompress_io_ctx *dic) > for (i = 0; i < dic->cluster_size; i++) { > if (dic->rpages[i]) > continue; > - f2fs_put_page(dic->tpages[i], 1); > + if (!dic->tpages[i]) > + continue; > + unlock_page(dic->tpages[i]); > + put_page(dic->tpages[i]); > } > kfree(dic->tpages); > } > -- > 2.18.0.rc1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel