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| author | Jason Baron <jbaron@akamai.com> | 2020-08-21 19:20:14 +0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2020-08-21 21:26:35 +0300 |
| commit | 8aebbbb2d573d0b4afc08b90ac7d73dba2d9da97 (patch) | |
| tree | 6a649d5c629e1a36d5799106278fe4300ea87d41 /drivers/hwmon/applesmc.c | |
| parent | 51fb91ed5a6fa855a74731610cd5435d83d6e17f (diff) | |
| download | linux-8aebbbb2d573d0b4afc08b90ac7d73dba2d9da97.tar.xz | |
hwmon: (nct7904) Correct divide by 0
We hit a kernel panic due to a divide by 0 in nct7904_read_fan() for
the hwmon_fan_min case. Extend the check to hwmon_fan_input case as well
for safety.
[ 1656.545650] divide error: 0000 [#1] SMP PTI
[ 1656.545779] CPU: 12 PID: 18010 Comm: sensors Not tainted 5.4.47 #1
[ 1656.546065] RIP: 0010:nct7904_read+0x1e9/0x510 [nct7904]
...
[ 1656.546549] RAX: 0000000000149970 RBX: ffffbd6b86bcbe08 RCX: 0000000000000000
...
[ 1656.547548] Call Trace:
[ 1656.547665] hwmon_attr_show+0x32/0xd0 [hwmon]
[ 1656.547783] dev_attr_show+0x18/0x50
[ 1656.547898] sysfs_kf_seq_show+0x99/0x120
[ 1656.548013] seq_read+0xd8/0x3e0
[ 1656.548127] vfs_read+0x89/0x130
[ 1656.548234] ksys_read+0x7d/0xb0
[ 1656.548342] do_syscall_64+0x48/0x110
[ 1656.548451] entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: d65a5102a99f5 ("hwmon: (nct7904) Convert to use new hwmon registration API")
Signed-off-by: Jason Baron <jbaron@akamai.com>
Link: https://lore.kernel.org/r/1598026814-2604-1-git-send-email-jbaron@akamai.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/applesmc.c')
0 files changed, 0 insertions, 0 deletions