diff options
| author | Edward Tomasz Napierala <trasz@FreeBSD.org> | 2020-10-20 17:24:29 +0000 |
|---|---|---|
| committer | Edward Tomasz Napierala <trasz@FreeBSD.org> | 2020-10-20 17:24:29 +0000 |
| commit | 91bc73618deae3a0d4efc467d94883c7e9fdd088 (patch) | |
| tree | 57ff5db17fd5c6eda340949636297d4c92c39a2b /sys/compat/linprocfs/linprocfs.c | |
| parent | 1a34e9fad6b6d894eb81002bd966684be1d1fe86 (diff) | |
Fix linprocfs(4) /proc/self/mem semantics to more closely match Linux.
Steam's Anti-Cheat might depend on it.
PR: 248223
Analyzed by: Alex S <iwtcex@gmail.com>
Reviewed by: kib
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26816
Notes
Notes:
svn path=/head/; revision=366900
Diffstat (limited to 'sys/compat/linprocfs/linprocfs.c')
| -rw-r--r-- | sys/compat/linprocfs/linprocfs.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/sys/compat/linprocfs/linprocfs.c b/sys/compat/linprocfs/linprocfs.c index 992b86c614ca..c95661d52940 100644 --- a/sys/compat/linprocfs/linprocfs.c +++ b/sys/compat/linprocfs/linprocfs.c @@ -1276,6 +1276,27 @@ linprocfs_doprocmaps(PFS_FILL_ARGS) } /* + * Filler function for proc/pid/mem + */ +static int +linprocfs_doprocmem(PFS_FILL_ARGS) +{ + ssize_t resid; + int error; + + resid = uio->uio_resid; + error = procfs_doprocmem(PFS_FILL_ARGNAMES); + + if (uio->uio_rw == UIO_READ && resid != uio->uio_resid) + return (0); + + if (error == EFAULT) + error = EIO; + + return (error); +} + +/* * Criteria for interface name translation */ #define IFP_IS_ETH(ifp) (ifp->if_type == IFT_ETHER) @@ -1853,7 +1874,7 @@ linprocfs_init(PFS_INIT_ARGS) NULL, &procfs_notsystem, NULL, 0); pfs_create_file(dir, "maps", &linprocfs_doprocmaps, NULL, NULL, NULL, PFS_RD); - pfs_create_file(dir, "mem", &procfs_doprocmem, + pfs_create_file(dir, "mem", &linprocfs_doprocmem, procfs_attr_rw, &procfs_candebug, NULL, PFS_RDWR | PFS_RAW); pfs_create_file(dir, "mounts", &linprocfs_domtab, NULL, NULL, NULL, PFS_RD); |