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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-23 20:55:54 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-23 20:55:54 +0100 |
| commit | edb23125fd4a79003012bc619d2c604da922865e (patch) | |
| tree | 1f3d86a6f19f89f5abfdc248cebb43a191875248 | |
| parent | Merge tag 'dma-mapping-2022-12-23' of git://git.infradead.org/users/hch/dma-m... (diff) | |
| parent | pstore: Properly assign mem_type property (diff) | |
| download | linux-edb23125fd4a79003012bc619d2c604da922865e.tar.xz linux-edb23125fd4a79003012bc619d2c604da922865e.zip | |
Merge tag 'pstore-v6.2-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull pstore fixes from Kees Cook:
- Switch pmsg_lock to an rt_mutex to avoid priority inversion (John
Stultz)
- Correctly assign mem_type property (Luca Stefani)
* tag 'pstore-v6.2-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
pstore: Properly assign mem_type property
pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES
pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion
| -rw-r--r-- | fs/pstore/Kconfig | 1 | ||||
| -rw-r--r-- | fs/pstore/pmsg.c | 7 | ||||
| -rw-r--r-- | fs/pstore/ram.c | 2 |
3 files changed, 6 insertions, 4 deletions
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index 8adabde685f1..c49d554cc9ae 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -126,6 +126,7 @@ config PSTORE_CONSOLE config PSTORE_PMSG bool "Log user space messages" depends on PSTORE + select RT_MUTEXES help When the option is enabled, pstore will export a character interface /dev/pmsg0 to log user space messages. On reboot diff --git a/fs/pstore/pmsg.c b/fs/pstore/pmsg.c index b31c9c72d90b..ab82e5f05346 100644 --- a/fs/pstore/pmsg.c +++ b/fs/pstore/pmsg.c @@ -7,9 +7,10 @@ #include <linux/device.h> #include <linux/fs.h> #include <linux/uaccess.h> +#include <linux/rtmutex.h> #include "internal.h" -static DEFINE_MUTEX(pmsg_lock); +static DEFINE_RT_MUTEX(pmsg_lock); static ssize_t write_pmsg(struct file *file, const char __user *buf, size_t count, loff_t *ppos) @@ -28,9 +29,9 @@ static ssize_t write_pmsg(struct file *file, const char __user *buf, if (!access_ok(buf, count)) return -EFAULT; - mutex_lock(&pmsg_lock); + rt_mutex_lock(&pmsg_lock); ret = psinfo->write_user(&record, buf); - mutex_unlock(&pmsg_lock); + rt_mutex_unlock(&pmsg_lock); return ret ? ret : count; } diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 9a5052431fd3..ade66dbe5f39 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -680,7 +680,7 @@ static int ramoops_parse_dt(struct platform_device *pdev, field = value; \ } - parse_u32("mem-type", pdata->record_size, pdata->mem_type); + parse_u32("mem-type", pdata->mem_type, pdata->mem_type); parse_u32("record-size", pdata->record_size, 0); parse_u32("console-size", pdata->console_size, 0); parse_u32("ftrace-size", pdata->ftrace_size, 0); |