From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Chao Yu <yuchao0@huawei.com>,
syzbot+0eac6f0bbd558fd866d7@syzkaller.appspotmail.com,
Jaegeuk Kim <jaegeuk@kernel.org>, Sasha Levin <sashal@kernel.org>,
linux-f2fs-devel@lists.sourceforge.net
Subject: [PATCH AUTOSEL 5.4 06/80] f2fs: fix uninit-value in f2fs_lookup
Date: Mon, 26 Oct 2020 19:54:02 -0400 [thread overview]
Message-ID: <20201026235516.1025100-6-sashal@kernel.org> (raw)
In-Reply-To: <20201026235516.1025100-1-sashal@kernel.org>
From: Chao Yu <yuchao0@huawei.com>
[ Upstream commit 6d7ab88a98c1b7a47c228f8ffb4f44d631eaf284 ]
As syzbot reported:
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x21c/0x280 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:122
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:219
f2fs_lookup+0xe05/0x1a80 fs/f2fs/namei.c:503
lookup_open fs/namei.c:3082 [inline]
open_last_lookups fs/namei.c:3177 [inline]
path_openat+0x2729/0x6a90 fs/namei.c:3365
do_filp_open+0x2b8/0x710 fs/namei.c:3395
do_sys_openat2+0xa88/0x1140 fs/open.c:1168
do_sys_open fs/open.c:1184 [inline]
__do_compat_sys_openat fs/open.c:1242 [inline]
__se_compat_sys_openat+0x2a4/0x310 fs/open.c:1240
__ia32_compat_sys_openat+0x56/0x70 fs/open.c:1240
do_syscall_32_irqs_on arch/x86/entry/common.c:80 [inline]
__do_fast_syscall_32+0x129/0x180 arch/x86/entry/common.c:139
do_fast_syscall_32+0x6a/0xc0 arch/x86/entry/common.c:162
do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:205
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
In f2fs_lookup(), @res_page could be used before being initialized,
because in __f2fs_find_entry(), once F2FS_I(dir)->i_current_depth was
been fuzzed to zero, then @res_page will never be initialized, causing
this kmsan warning, relocating @res_page initialization place to fix
this bug.
Reported-by: syzbot+0eac6f0bbd558fd866d7@syzkaller.appspotmail.com
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/dir.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index e9af46dc06f72..78d041f9775a4 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -303,16 +303,15 @@ struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
unsigned int max_depth;
unsigned int level;
+ *res_page = NULL;
+
if (f2fs_has_inline_dentry(dir)) {
- *res_page = NULL;
de = f2fs_find_in_inline_dir(dir, fname, res_page);
goto out;
}
- if (npages == 0) {
- *res_page = NULL;
+ if (npages == 0)
goto out;
- }
max_depth = F2FS_I(dir)->i_current_depth;
if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
@@ -323,7 +322,6 @@ struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
}
for (level = 0; level < max_depth; level++) {
- *res_page = NULL;
de = find_in_level(dir, level, fname, res_page);
if (de || IS_ERR(*res_page))
break;
--
2.25.1
next prev parent reply other threads:[~2020-10-26 23:57 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-26 23:53 [PATCH AUTOSEL 5.4 01/80] powerpc/powernv/smp: Fix spurious DBG() warning Sasha Levin
2020-10-26 23:53 ` [PATCH AUTOSEL 5.4 02/80] mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race Sasha Levin
2020-10-26 23:53 ` [PATCH AUTOSEL 5.4 03/80] powerpc: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 04/80] sparc64: remove mm_cpumask clearing to fix kthread_use_mm race Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 05/80] f2fs: add trace exit in exception path Sasha Levin
2020-10-26 23:54 ` Sasha Levin [this message]
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 07/80] f2fs: fix to check segment boundary during SIT page readahead Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 08/80] s390/startup: avoid save_area_sync overflow Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 09/80] um: change sigio_spinlock to a mutex Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 10/80] f2fs: handle errors of f2fs_get_meta_page_nofail Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 11/80] MIPS: ftrace: Remove redundant #ifdef CONFIG_DYNAMIC_FTRACE Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 12/80] ARM: 8997/2: hw_breakpoint: Handle inexact watchpoint addresses Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 13/80] NFS4: Fix oops when copy_file_range is attempted with NFS4.0 source Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 14/80] power: supply: bq27xxx: report "not charging" on all types Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 15/80] xfs: fix realtime bitmap/summary file truncation when growing rt volume Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 16/80] video: fbdev: pvr2fb: initialize variables Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 17/80] ath10k: start recovery process when payload length exceeds max htc length for sdio Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 18/80] ath10k: fix VHT NSS calculation when STBC is enabled Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 19/80] drm/brige/megachips: Add checking if ge_b850v3_lvds_init() is working correctly Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 20/80] selftests/x86/fsgsbase: Reap a forgotten child Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 21/80] media: videodev2.h: RGB BT2020 and HSV are always full range Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 22/80] media: platform: Improve queue set up flow for bug fixing Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 23/80] usb: typec: tcpm: During PR_SWAP, source caps should be sent only after tSwapSourceStart Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 24/80] media: tw5864: check status of tw5864_frameinterval_get Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 25/80] media: imx274: fix frame interval handling Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 26/80] mmc: via-sdmmc: Fix data race bug Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 27/80] drm/bridge/synopsys: dsi: add support for non-continuous HS clock Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 28/80] arm64: topology: Stop using MPIDR for topology information Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 29/80] printk: reduce LOG_BUF_SHIFT range for H8300 Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 30/80] ia64: kprobes: Use generic kretprobe trampoline handler Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 31/80] kgdb: Make "kgdbcon" work properly with "kgdb_earlycon" Sasha Levin
2020-10-27 12:01 ` Daniel Thompson
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 32/80] bpf: Permit map_ptr arithmetic with opcode add and offset 0 Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 33/80] media: uvcvideo: Fix dereference of out-of-bound list iterator Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 34/80] selftests/bpf: Define string const as global for test_sysctl_prog.c Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 35/80] samples/bpf: Fix possible deadlock in xdpsock Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 36/80] riscv: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 37/80] cpufreq: sti-cpufreq: add stih418 support Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 38/80] USB: adutux: fix debugging Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 39/80] uio: free uio id after uio file node is freed Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 40/80] coresight: Make sysfs functional on topologies with per core sink Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 41/80] usb: xhci: omit duplicate actions when suspending a runtime suspended host Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 42/80] SUNRPC: Mitigate cond_resched() in xprt_transmit() Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 43/80] arm64/mm: return cpu_all_mask when node is NUMA_NO_NODE Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 44/80] can: flexcan: disable clocks during stop mode Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 45/80] xfs: don't free rt blocks when we're doing a REMAP bunmapi call Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 46/80] ACPI: Add out of bounds and numa_off protections to pxm_to_node() Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 47/80] genirq: Add stub for set_handle_irq() when !GENERIC_IRQ_MULTI_HANDLER Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 48/80] dm: change max_io_len() to use blk_max_size_offset() Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 49/80] brcmfmac: Fix warning message after dongle setup failed Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 50/80] drivers/net/wan/hdlc_fr: Correctly handle special skb->protocol values Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 51/80] bus/fsl_mc: Do not rely on caller to provide non NULL mc_io Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 52/80] ACPI: HMAT: Fix handling of changes from ACPI 6.2 to ACPI 6.3 Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 53/80] power: supply: test_power: add missing newlines when printing parameters by sysfs Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 54/80] drm/amd/display: HDMI remote sink need mode validation for Linux Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 55/80] ARC: [dts] fix the errors detected by dtbs_check Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 56/80] btrfs: fix replace of seed device Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 57/80] md/bitmap: md_bitmap_get_counter returns wrong blocks Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 58/80] bnxt_en: Log unknown link speed appropriately Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 59/80] rpmsg: glink: Use complete_all for open states Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 60/80] clk: ti: clockdomain: fix static checker warning Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 61/80] phy: marvell: comphy: Convert internal SMCC firmware return codes to errno Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 62/80] asm-generic/io.h: Fix !CONFIG_GENERIC_IOMAP pci_iounmap() implementation Sasha Levin
2020-10-26 23:54 ` [PATCH AUTOSEL 5.4 63/80] net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 64/80] drivers: watchdog: rdc321x_wdt: Fix race condition bugs Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 65/80] ext4: Detect already used quota file early Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 66/80] PCI: dwc: Add link up check in dw_child_pcie_ops.map_bus() Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 67/80] KVM: PPC: Book3S HV: Do not allocate HPT for a nested guest Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 68/80] gfs2: use-after-free in sysfs deregistration Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 69/80] gfs2: add validation checks for size of superblock Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 70/80] cifs: handle -EINTR in cifs_setattr Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 71/80] arm64: dts: renesas: ulcb: add full-pwr-cycle-in-suspend into eMMC nodes Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 72/80] ARM: dts: omap4: Fix sgx clock rate for 4430 Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 73/80] memory: emif: Remove bogus debugfs error handling Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 74/80] ARM: dts: s5pv210: remove DMA controller bus node name to fix dtschema warnings Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 75/80] ARM: dts: s5pv210: move fixed clocks under root node Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 76/80] ARM: dts: s5pv210: move PMU node out of clock controller Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 77/80] ARM: dts: s5pv210: remove dedicated 'audio-subsystem' node Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 78/80] nbd: make the config put is called before the notifying the waiter Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 79/80] sgl_alloc_order: fix memory leak Sasha Levin
2020-10-26 23:55 ` [PATCH AUTOSEL 5.4 80/80] nvme-rdma: fix crash when connect rejected Sasha Levin
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