diff options
| author | Tony Lin <tony.lin@freescale.com> | 2011-11-17 17:49:15 +0800 |
|---|---|---|
| committer | Eric Miao <eric.miao@linaro.org> | 2011-12-01 11:36:40 +0800 |
| commit | 9ba4f9d08db576dcfebc336834b02fe89819515e (patch) | |
| tree | cce01e9fc21fef8caf210e7a8d3311a7cd8aab4b | |
| parent | eabf4b82b7a6e942898c16f15f4fa078559e91e1 (diff) | |
ENGR00162198 [MX6q_ARM2]filesystem: Kernel dump if unplug SD card during bonnie
add pointer check before accesssing to fix following problem
staErXtT 3'-efms. .(.mmcblk1p2): error: remounting filesystem read-only
Unable to handle kernel NULL pointer dereference at virtual address 00000010
pgd = df334000
[00000010] *pgd=71e85831, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] PREEMPT SMP
last sysfs file: /sys/devices/platform/sdhci-esdhc-imx.2/mmc_host/mmc1/
mmc1:b368/serial
Modules linked in: ahci_platform ov3640_camera libahci libata
CPU: 1 Not tainted (2.6.38-daily-00808-g43b3e87 #1)
PC is at __mark_inode_dirty+0xc8/0x1b4
LR is at __mark_inode_dirty+0xb8/0x1b4
pc : [<800f7418>] lr : [<800f7408>] psr: 20000013
sp : df14dde0 ip : 00000062 fp : 00000000
r10: 003d2000 r9 : df14df38 r8 : 00000000
r7 : 4ec22acb r6 : 00000003 r5 : 00000000 r4 : e028c720
r3 : 00000001 r2 : 00000065 r1 : 804fe50c r0 : 00000001
Signed-off-by Tony Lin <tony.lin@freescale.com>
| -rw-r--r-- | fs/fs-writeback.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 59c6e495678..95aa6d73ef3 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -1047,6 +1047,8 @@ void __mark_inode_dirty(struct inode *inode, int flags) */ if (!was_dirty) { bdi = inode_to_bdi(inode); + if (!bdi) + goto out; if (bdi_cap_writeback_dirty(bdi)) { WARN(!test_bit(BDI_registered, &bdi->state), |