mirror of
git://git.proxmox.com/git/lxc.git
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cleanup old files
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller
parent
426165545a
commit
9984235231
@ -1,44 +0,0 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Wolfgang Bumiller <w.bumiller@proxmox.com>
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Date: Fri, 1 Jul 2022 11:09:15 +0200
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Subject: [PATCH] add check for statvfs
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we use HAVE_STATVFS in the code but with meson the check got
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lost causing mount_entry to fail to remount some things such
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as a bind mount of /dev/fuse via
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lxc.mount.entry = /dev/fuse dev/fuse none bind,create=file 0 0
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which would cause the following log messages:
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DEBUG conf - ../src/lxc/conf.c:mount_entry:2416 - Remounting "/dev/fuse" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/dev/fuse" to respect bind or remount options
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ERROR conf - ../src/lxc/conf.c:mount_entry:2459 - Operation not permitted - Failed to mount "/dev/fuse" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/dev/fuse"
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note that the `Flags for ... were ...` line is not showing
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up there, which depends on HAVE_STATVFS
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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
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---
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meson.build | 2 ++
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1 file changed, 2 insertions(+)
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diff --git a/meson.build b/meson.build
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index 43362d37a..274511037 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -493,6 +493,7 @@ foreach tuple: [
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['sigdescr_np'],
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['signalfd'],
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['statx'],
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+ ['statvfs'],
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['strlcat'],
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['strlcpy'],
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['unshare'],
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@@ -622,6 +623,7 @@ foreach ident: [
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['setns', '''#include <sched.h>'''],
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['sigdescr_np', '''#include <string.h>'''],
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['signalfd', '''#include <sys/signalfd.h>'''],
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+ ['statvfs', '''#include <sys/statvfs.h>'''],
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['statx', '''#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>'''],
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@ -1,25 +0,0 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: srd424 <srd424@users.noreply.github.com>
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Date: Sun, 3 Jul 2022 10:21:30 +0100
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Subject: [PATCH] Fix off-by-one error constructing mount options
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This fixes a really subtle off-by-one error constructing overlay mount options if rootfs options are provided and modern overlayfs (i.e. requiring a workdir) is used. We need to allow for the extra "," required to separate the extra options when computing the length!
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Signed-off-by: srd424 <srd424@users.noreply.github.com>
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---
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src/lxc/storage/overlay.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/lxc/storage/overlay.c b/src/lxc/storage/overlay.c
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index f8094fada..0c3fa1220 100644
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--- a/src/lxc/storage/overlay.c
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+++ b/src/lxc/storage/overlay.c
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@@ -445,7 +445,7 @@ int ovl_mount(struct lxc_storage *bdev)
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upper, lower, mntdata);
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len2 = strlen(lower) + strlen(upper) + strlen(work) +
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- strlen("upperdir=,lowerdir=,workdir=") +
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+ strlen("upperdir=,lowerdir=,workdir=,") +
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strlen(mntdata) + 1;
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options_work = must_realloc(NULL, len2);
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ret2 = snprintf(options, len2,
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@ -1,25 +0,0 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: srd424 <srd424@users.noreply.github.com>
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Date: Sun, 3 Jul 2022 18:18:23 +0100
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Subject: [PATCH] Store mount options in correct variable
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This was exposed by the fix in the previous commit.
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Signed-off-by: srd424 <srd424@users.noreply.github.com>
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---
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src/lxc/storage/overlay.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/lxc/storage/overlay.c b/src/lxc/storage/overlay.c
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index 0c3fa1220..f38f3a740 100644
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--- a/src/lxc/storage/overlay.c
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+++ b/src/lxc/storage/overlay.c
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@@ -448,7 +448,7 @@ int ovl_mount(struct lxc_storage *bdev)
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strlen("upperdir=,lowerdir=,workdir=,") +
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strlen(mntdata) + 1;
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options_work = must_realloc(NULL, len2);
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- ret2 = snprintf(options, len2,
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+ ret2 = snprintf(options_work, len2,
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"upperdir=%s,lowerdir=%s,workdir=%s,%s", upper,
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lower, work, mntdata);
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} else {
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@ -1,81 +0,0 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Raphael Isemann <teemperor@gmail.com>
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Date: Tue, 21 Jun 2022 13:10:40 +0200
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Subject: [PATCH] Fix uninitialized read in parse_cap when libcap is not used
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fuzz-lxc-cgroup-init currently fails for me with the input
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```
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lxc.cap.keep=0
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```
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with this report:
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```
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==640655==WARNING: MemorySanitizer: use-of-uninitialized-value
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#0 0x833c77 in parse_cap /src/lxc/san_build/../src/lxc/conf.c:3161:6
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#1 0xaa5fd6 in add_cap_entry /src/lxc/san_build/../src/lxc/confile.c:2462:9
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#2 0x9eb69c in set_config_cap_keep /src/lxc/san_build/../src/lxc/confile.c:2503:8
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#3 0x974a76 in parse_line /src/lxc/san_build/../src/lxc/confile.c:3115:9
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#4 0xea8cac in lxc_file_for_each_line_mmap /src/lxc/san_build/../src/lxc/parse.c:123:9
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#5 0x9700a1 in lxc_config_read /src/lxc/san_build/../src/lxc/confile.c:3192:9
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#6 0x4a3b50 in LLVMFuzzerTestOneInput /src/lxc/san_build/../src/tests/fuzz-lxc-cgroup-init.c:40:8
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#7 0x10556e3 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:611:15
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#8 0x1041372 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:324:6
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#9 0x1046bbc in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:860:9
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#10 0x106f7b2 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
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#11 0x7ffff7bc00b2 in __libc_start_main /build/glibc-sMfBJT/glibc-2.31/csu/../csu/libc-start.c:308:16
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#12 0x420a9d in _start (/home/fuzzer/oss-fuzz/build/out/lxc/fuzz-lxc-cgroup-init+0x420a9d)
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Uninitialized value was created by an allocation of 'last_cap' in the stack frame of function 'parse_cap'
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#0 0x832e30 in parse_cap /src/lxc/san_build/../src/lxc/conf.c:3131
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```
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The reason is that without libcap we parse_cap ends up comparing two
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uninitialized values. See the snippet below:
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```
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int parse_cap(const char *cap_name, __u32 *cap)
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{
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int ret;
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unsigned int res;
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__u32 last_cap;
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[...]
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ret = lxc_caps_last_cap(&last_cap); // NOTE: 1. Call here.
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if (ret) // Not taken as dummy lxc_caps_last_cap returned 0.
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return -1;
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if ((__u32)res > last_cap) // last_cap is uninitialized.
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return -1;
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*cap = (__u32)res;
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return 0;
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}
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```
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Root cause seems to be that the dummy `lxc_caps_last_cap` returns 0 but
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doesn't set the last_cap value. This patch just returns -1 as an error code
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to avoid the uninitialized read.
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Note: When reproducing the bug you need to compile with O0 and *not* with O1
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otherwise you will not see the report.
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Signed-off-by: Raphael Isemann <teemperor@gmail.com>
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---
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src/lxc/caps.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/lxc/caps.h b/src/lxc/caps.h
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index fd1456b81..fbec1fdb5 100644
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--- a/src/lxc/caps.h
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+++ b/src/lxc/caps.h
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@@ -49,7 +49,7 @@ static inline int lxc_caps_init(void)
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static inline int lxc_caps_last_cap(__u32 *cap)
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{
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- return 0;
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+ return -1;
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}
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typedef int cap_value_t;
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@ -1,101 +0,0 @@
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Wolfgang Bumiller <w.bumiller@proxmox.com>
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Date: Mon, 4 Jul 2022 11:27:14 +0200
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Subject: [PATCH] meson: add remaining still-in-use config checks
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These are all still in use in the code but have not been
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added to meson.build when switching over from autoconf.
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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
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---
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meson.build | 31 ++++++++++++++++++++++++++-----
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1 file changed, 26 insertions(+), 5 deletions(-)
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diff --git a/meson.build b/meson.build
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index 274511037..ebbd6b697 100644
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--- a/meson.build
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+++ b/meson.build
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@@ -375,6 +375,9 @@ if want_capabilities
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if not libcap.found()
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# Compat with Ubuntu 14.04 which ships libcap w/o .pc file
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libcap = cc.find_library('cap', required: false)
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+ else
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+ have = cc.has_function('cap_get_file', dependencies: libcap, prefix: '#include <sys/capability.h>')
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+ srcconf.set10('LIBCAP_SUPPORTS_FILE_CAPABILITIES', have)
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endif
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srcconf.set10('HAVE_LIBCAP', libcap.found())
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pkgconfig_libs += libcap
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@@ -399,6 +402,8 @@ else
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srcconf.set10('HAVE_STATIC_LIBCAP', false)
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endif
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+libutil = cc.find_library('util', required: false)
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+
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if want_oss_fuzz
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srcconf.set10('FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION', true)
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srcconf.set10('RUN_ON_OSS_FUZZ', true)
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@@ -414,12 +419,21 @@ srcconf.set10('HAVE_PAM', pam.found())
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pkgconfig_libs += pam
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## Others.
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+have = cc.has_function('fmemopen', prefix: '#include <stdio.h>', args: '-D_GNU_SOURCE')
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+srcconf.set10('HAVE_FMEMOPEN', have)
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+
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+have_openpty = cc.has_function('openpty', dependencies: libutil, prefix: '#include <pty.h>')
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+srcconf.set10('HAVE_OPENPTY', have_openpty)
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+
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+have = cc.has_function('pthread_setcancelstate', prefix: '#include <pthread.h>')
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+srcconf.set10('HAVE_PTHREAD_SETCANCELSTATE', have)
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+
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+have = cc.has_function('rand_r')
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+srcconf.set10('HAVE_RAND_R', have)
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+
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have = cc.has_function('strchrnul', prefix: '#include <string.h>', args: '-D_GNU_SOURCE')
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srcconf.set10('HAVE_STRCHRNUL', have)
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-have = cc.has_function('openpty', prefix: '#include <pty.h>', args: '-D_GNU_SOURCE')
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-srcconf.set10('HAVE_OPENPTY', have)
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-
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have_func_strerror_r = cc.has_function('strerror_r', prefix: '#include <string.h>', args: '-D_GNU_SOURCE')
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srcconf.set10('HAVE_STRERROR_R', have_func_strerror_r)
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@@ -520,16 +534,18 @@ decl_headers = '''
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <linux/fs.h>
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-#include <linux/types.h>
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+#include <linux/if_link.h>
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#include <linux/openat2.h>
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#include <linux/sched.h>
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+#include <linux/types.h>
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'''
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foreach decl: [
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'__aligned_u64',
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+ 'struct clone_args',
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'struct mount_attr',
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'struct open_how',
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- 'struct clone_args',
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+ 'struct rtnl_link_stats64',
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]
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# We get -1 if the size cannot be determined
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@@ -549,6 +565,7 @@ foreach tuple: [
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['__aligned_u64'],
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['struct mount_attr'],
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['struct open_how'],
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+ ['struct rtnl_link_stats64'],
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]
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if tuple.length() >= 2
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@@ -751,6 +768,10 @@ if want_io_uring
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liblxc_dependencies += [liburing]
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endif
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+if have_openpty
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+ liblxc_dependencies += [libutil]
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+endif
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+
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liblxc_link_whole = [liblxc_static]
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liblxc = shared_library(
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