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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2007-11-23 16:43:04 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-12-20 17:13:34 +1100 |
| commit | 9ac71d00398674aaec664f30559f0a21d963862f (patch) | |
| tree | b683032ac55b92e2760a3e0dafb7ce9658378e79 /arch/powerpc/platforms/chrp/setup.c | |
| parent | 08a644ecef9383b109b763f5087265fd1759875f (diff) | |
| download | linux-stable-9ac71d00398674aaec664f30559f0a21d963862f.tar.gz linux-stable-9ac71d00398674aaec664f30559f0a21d963862f.tar.bz2 linux-stable-9ac71d00398674aaec664f30559f0a21d963862f.zip | |
[POWERPC] CHRP: Fix possible NULL pointer dereference
This fixes a possible NULL pointer dereference inside of strncmp() if
of_get_property() fails.
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/chrp/setup.c')
| -rw-r--r-- | arch/powerpc/platforms/chrp/setup.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c index 59306261f5b2..42a21bab76c8 100644 --- a/arch/powerpc/platforms/chrp/setup.c +++ b/arch/powerpc/platforms/chrp/setup.c @@ -115,7 +115,7 @@ void chrp_show_cpuinfo(struct seq_file *m) seq_printf(m, "machine\t\t: CHRP %s\n", model); /* longtrail (goldengate) stuff */ - if (!strncmp(model, "IBM,LongTrail", 13)) { + if (model && !strncmp(model, "IBM,LongTrail", 13)) { /* VLSI VAS96011/12 `Golden Gate 2' */ /* Memory banks */ sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL) @@ -203,15 +203,20 @@ static void __init sio_fixup_irq(const char *name, u8 device, u8 level, static void __init sio_init(void) { struct device_node *root; + const char *model; - if ((root = of_find_node_by_path("/")) && - !strncmp(of_get_property(root, "model", NULL), - "IBM,LongTrail", 13)) { + root = of_find_node_by_path("/"); + if (!root) + return; + + model = of_get_property(root, "model", NULL); + if (model && !strncmp(model, "IBM,LongTrail", 13)) { /* logical device 0 (KBC/Keyboard) */ sio_fixup_irq("keyboard", 0, 1, 2); /* select logical device 1 (KBC/Mouse) */ sio_fixup_irq("mouse", 1, 12, 2); } + of_node_put(root); } |