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[PATCH v2 052/109] virtiofsd: Parse flag FUSE_WRITE_KILL_PRIV
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[PATCH v2 052/109] virtiofsd: Parse flag FUSE_WRITE_KILL_PRIV |
Date: |
Tue, 21 Jan 2020 12:23:36 +0000 |
From: Vivek Goyal <address@hidden>
Caller can set FUSE_WRITE_KILL_PRIV in write_flags. Parse it and pass it
to the filesystem.
Signed-off-by: Vivek Goyal <address@hidden>
Reviewed-by: Misono Tomohiro <address@hidden>
Reviewed-by: Sergio Lopez <address@hidden>
---
tools/virtiofsd/fuse_common.h | 6 +++++-
tools/virtiofsd/fuse_lowlevel.c | 4 +++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/tools/virtiofsd/fuse_common.h b/tools/virtiofsd/fuse_common.h
index deac132081..4b2c215fd9 100644
--- a/tools/virtiofsd/fuse_common.h
+++ b/tools/virtiofsd/fuse_common.h
@@ -93,8 +93,12 @@ struct fuse_file_info {
*/
unsigned int cache_readdir:1;
+ /* Indicates that suid/sgid bits should be removed upon write */
+ unsigned int kill_priv:1;
+
+
/** Padding. Reserved for future use*/
- unsigned int padding:25;
+ unsigned int padding:24;
unsigned int padding2:32;
/*
diff --git a/tools/virtiofsd/fuse_lowlevel.c b/tools/virtiofsd/fuse_lowlevel.c
index f3e7f46008..63df56da6e 100644
--- a/tools/virtiofsd/fuse_lowlevel.c
+++ b/tools/virtiofsd/fuse_lowlevel.c
@@ -1143,6 +1143,7 @@ static void do_write(fuse_req_t req, fuse_ino_t nodeid,
memset(&fi, 0, sizeof(fi));
fi.fh = arg->fh;
fi.writepage = (arg->write_flags & FUSE_WRITE_CACHE) != 0;
+ fi.kill_priv = !!(arg->write_flags & FUSE_WRITE_KILL_PRIV);
fi.lock_owner = arg->lock_owner;
fi.flags = arg->flags;
@@ -1178,7 +1179,8 @@ static void do_write_buf(fuse_req_t req, fuse_ino_t
nodeid,
fi.lock_owner = arg->lock_owner;
fi.flags = arg->flags;
fi.fh = arg->fh;
- fi.writepage = arg->write_flags & FUSE_WRITE_CACHE;
+ fi.writepage = !!(arg->write_flags & FUSE_WRITE_CACHE);
+ fi.kill_priv = !!(arg->write_flags & FUSE_WRITE_KILL_PRIV);
if (ibufv->count == 1) {
assert(!(tmpbufv.buf[0].flags & FUSE_BUF_IS_FD));
--
2.24.1
- [PATCH v2 044/109] virtiofsd: check input buffer size in fuse_lowlevel.c ops, (continued)
- [PATCH v2 044/109] virtiofsd: check input buffer size in fuse_lowlevel.c ops, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 046/109] virtiofsd: prevent ".." escape in lo_do_readdir(), Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 047/109] virtiofsd: use /proc/self/fd/ O_PATH file descriptor, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 048/109] virtiofsd: sandbox mount namespace, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 049/109] virtiofsd: move to an empty network namespace, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 051/109] virtiofsd: add seccomp whitelist, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 050/109] virtiofsd: move to a new pid namespace, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 052/109] virtiofsd: Parse flag FUSE_WRITE_KILL_PRIV,
Dr. David Alan Gilbert (git) <=
- [PATCH v2 053/109] virtiofsd: cap-ng helpers, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 054/109] virtiofsd: Drop CAP_FSETID if client asked for it, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 055/109] virtiofsd: set maximum RLIMIT_NOFILE limit, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 056/109] virtiofsd: fix libfuse information leaks, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 057/109] docs: Add docs/tools, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 058/109] virtiofsd: add security guide document, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 059/109] virtiofsd: add --syslog command-line option, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 060/109] virtiofsd: print log only when priority is high enough, Dr. David Alan Gilbert (git), 2020/01/21
- [PATCH v2 062/109] virtiofsd: Add timestamp to the log with FUSE_LOG_DEBUG level, Dr. David Alan Gilbert (git), 2020/01/21