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b=mCVZADOc6fY94QafbVw+3/9mwP8AmlJTs2W59dZ42orSc3nDPTgD/07PL9XP07sjZ F4NrWqriF4DH0GnLW34b5kQmDugzaLMEigBfczv/x3f5NsVRaKI7BRHa5VDKfkt6r8 w1ylxccFD66EOA7N3ae0K5tEdVfQO/h/BmI4j/nPuSn35vMrQVcLODvTeXQiRkgwl+ gqhsFe8HrcEYO2+rCOmtNII7wkfUPH0DvjRYXSaWzxaL0UIotsKt0qkWs1Nr6Lr9Sm 8+J/CdMblYscesJGl2yoHbwZkcVHSNpL0Mp9wUGmi1oE4p+ih7h3IrNuwVHJXSiJL5 VHrp57Ojxho4A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Date: Sun, 14 Aug 2022 12:28:27 -0400 Message-Id: <20220814162833.2398478-12-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220814162833.2398478-1-sashal@kernel.org> References: <20220814162833.2398478-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-Headers-End: 1oNGUE-0000B3-SA Subject: [f2fs-dev] [PATCH AUTOSEL 5.4 12/16] f2fs: fix to avoid use f2fs_bug_on() in f2fs_new_node_page() X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , linux-f2fs-devel@lists.sourceforge.net, Dipanjan Das , Jaegeuk Kim Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Chao Yu [ Upstream commit 141170b759e03958f296033bb7001be62d1d363b ] As Dipanjan Das reported, syzkaller found a f2fs bug as below: RIP: 0010:f2fs_new_node_page+0x19ac/0x1fc0 fs/f2fs/node.c:1295 Call Trace: write_all_xattrs fs/f2fs/xattr.c:487 [inline] __f2fs_setxattr+0xe76/0x2e10 fs/f2fs/xattr.c:743 f2fs_setxattr+0x233/0xab0 fs/f2fs/xattr.c:790 f2fs_xattr_generic_set+0x133/0x170 fs/f2fs/xattr.c:86 __vfs_setxattr+0x115/0x180 fs/xattr.c:182 __vfs_setxattr_noperm+0x125/0x5f0 fs/xattr.c:216 __vfs_setxattr_locked+0x1cf/0x260 fs/xattr.c:277 vfs_setxattr+0x13f/0x330 fs/xattr.c:303 setxattr+0x146/0x160 fs/xattr.c:611 path_setxattr+0x1a7/0x1d0 fs/xattr.c:630 __do_sys_lsetxattr fs/xattr.c:653 [inline] __se_sys_lsetxattr fs/xattr.c:649 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:649 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 NAT entry and nat bitmap can be inconsistent, e.g. one nid is free in nat bitmap, and blkaddr in its NAT entry is not NULL_ADDR, it may trigger BUG_ON() in f2fs_new_node_page(), fix it. Reported-by: Dipanjan Das Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/node.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 3dc7cc3d6ac6..b080d5c58f6c 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1240,7 +1240,11 @@ struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs) dec_valid_node_count(sbi, dn->inode, !ofs); goto fail; } - f2fs_bug_on(sbi, new_ni.blk_addr != NULL_ADDR); + if (unlikely(new_ni.blk_addr != NULL_ADDR)) { + err = -EFSCORRUPTED; + set_sbi_flag(sbi, SBI_NEED_FSCK); + goto fail; + } #endif new_ni.nid = dn->nid; new_ni.ino = dn->inode->i_ino; -- 2.35.1 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel