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| author | Dipankar Sarma <dipankar@in.ibm.com> | 2005-09-16 19:28:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-17 11:50:02 -0700 |
| commit | 4fb3a53860cee2aaaf81186c451b7da0b95b45c1 (patch) | |
| tree | db66ba7d3886644729707586aed781c445e12c16 /arch/alpha | |
| parent | af4e5a218e18ad588d60a4f9d6f8fb5db1a32587 (diff) | |
| download | linux-3.10-4fb3a53860cee2aaaf81186c451b7da0b95b45c1.tar.gz linux-3.10-4fb3a53860cee2aaaf81186c451b7da0b95b45c1.tar.bz2 linux-3.10-4fb3a53860cee2aaaf81186c451b7da0b95b45c1.zip | |
[PATCH] files: fix preemption issues
With the new fdtable locking rules, you have to protect fdtable with either
->file_lock or rcu_read_lock/unlock(). There are some places where we
aren't doing either. This patch fixes those places.
Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/alpha')
| -rw-r--r-- | arch/alpha/kernel/osf_sys.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c index 0636116210d..01fe990d3e5 100644 --- a/arch/alpha/kernel/osf_sys.c +++ b/arch/alpha/kernel/osf_sys.c @@ -37,6 +37,7 @@ #include <linux/namei.h> #include <linux/uio.h> #include <linux/vfs.h> +#include <linux/rcupdate.h> #include <asm/fpu.h> #include <asm/io.h> @@ -975,6 +976,7 @@ osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, long timeout; int ret = -EINVAL; struct fdtable *fdt; + int max_fdset; timeout = MAX_SCHEDULE_TIMEOUT; if (tvp) { @@ -996,8 +998,11 @@ osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, } } + rcu_read_lock(); fdt = files_fdtable(current->files); - if (n < 0 || n > fdt->max_fdset) + max_fdset = fdt->max_fdset; + rcu_read_unlock(); + if (n < 0 || n > max_fdset) goto out_nofds; /* |