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Description |
bpf/vmtest-bpf-next-PR |
success
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PR summary
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netdev/series_format |
success
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Single patches do not need cover letters
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netdev/tree_selection |
success
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Clearly marked for bpf-next
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netdev/ynl |
success
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SINGLE THREAD;
Generated files up to date;
no warnings/errors;
no diff in generated;
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netdev/fixes_present |
success
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Fixes tag not required for -next series
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netdev/header_inline |
success
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No static functions without inline keyword in header files
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netdev/build_32bit |
success
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Errors and warnings before: 1117 this patch: 1117
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netdev/cc_maintainers |
warning
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9 maintainers not CCed: sdf@google.com haoluo@google.com martin.lau@linux.dev jolsa@kernel.org kpsingh@kernel.org yonghong.song@linux.dev ast@kernel.org song@kernel.org john.fastabend@gmail.com
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netdev/build_clang |
success
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Errors and warnings before: 1143 this patch: 1143
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netdev/verify_signedoff |
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Signed-off-by tag matches author and committer
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netdev/deprecated_api |
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None detected
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netdev/check_selftest |
success
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No net selftest shell script
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netdev/verify_fixes |
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Fixes tag looks correct
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netdev/build_allmodconfig_warn |
success
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Errors and warnings before: 1144 this patch: 1144
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netdev/checkpatch |
success
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total: 0 errors, 0 warnings, 0 checks, 104 lines checked
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netdev/build_clang_rust |
success
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No Rust files in patch. Skipping build
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netdev/kdoc |
success
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Errors and warnings before: 0 this patch: 0
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netdev/source_inline |
success
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Was 0 now: 0
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bpf/vmtest-bpf-next-VM_Test-2 |
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Logs for Unittests
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bpf/vmtest-bpf-next-VM_Test-0 |
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Logs for Lint
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bpf/vmtest-bpf-next-VM_Test-3 |
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bpf/vmtest-bpf-next-VM_Test-1 |
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bpf/vmtest-bpf-next-VM_Test-5 |
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bpf/vmtest-bpf-next-VM_Test-4 |
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bpf/vmtest-bpf-next-VM_Test-6 |
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bpf/vmtest-bpf-next-VM_Test-9 |
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bpf/vmtest-bpf-next-VM_Test-10 |
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bpf/vmtest-bpf-next-VM_Test-12 |
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bpf/vmtest-bpf-next-VM_Test-7 |
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bpf/vmtest-bpf-next-VM_Test-8 |
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Logs for aarch64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on aarch64 with gcc
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bpf/vmtest-bpf-next-VM_Test-11 |
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Logs for s390x-gcc / build / build for s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-18 |
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Logs for set-matrix
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bpf/vmtest-bpf-next-VM_Test-20 |
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Logs for x86_64-gcc / build-release
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bpf/vmtest-bpf-next-VM_Test-19 |
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bpf/vmtest-bpf-next-VM_Test-17 |
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bpf/vmtest-bpf-next-VM_Test-28 |
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bpf/vmtest-bpf-next-VM_Test-34 |
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bpf/vmtest-bpf-next-VM_Test-35 |
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bpf/vmtest-bpf-next-VM_Test-36 |
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bpf/vmtest-bpf-next-VM_Test-42 |
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bpf/vmtest-bpf-next-VM_Test-21 |
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bpf/vmtest-bpf-next-VM_Test-24 |
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bpf/vmtest-bpf-next-VM_Test-27 |
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bpf/vmtest-bpf-next-VM_Test-26 |
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bpf/vmtest-bpf-next-VM_Test-31 |
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bpf/vmtest-bpf-next-VM_Test-32 |
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bpf/vmtest-bpf-next-VM_Test-39 |
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bpf/vmtest-bpf-next-VM_Test-33 |
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bpf/vmtest-bpf-next-VM_Test-40 |
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bpf/vmtest-bpf-next-VM_Test-37 |
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bpf/vmtest-bpf-next-VM_Test-41 |
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bpf/vmtest-bpf-next-VM_Test-38 |
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bpf/vmtest-bpf-next-VM_Test-16 |
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bpf/vmtest-bpf-next-VM_Test-15 |
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bpf/vmtest-bpf-next-VM_Test-14 |
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Logs for s390x-gcc / test (test_progs, false, 360) / test_progs on s390x with gcc
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bpf/vmtest-bpf-next-VM_Test-13 |
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Logs for s390x-gcc / test (test_maps, false, 360) / test_maps on s390x with gcc
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@@ -599,8 +599,15 @@ EXPORT_SYMBOL(bpf_prog_get_type_path);
*/
static int bpf_show_options(struct seq_file *m, struct dentry *root)
{
- umode_t mode = d_inode(root)->i_mode & S_IALLUGO & ~S_ISVTX;
-
+ struct inode *inode = d_inode(root);
+ umode_t mode = inode->i_mode & S_IALLUGO & ~S_ISVTX;
+
+ if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID))
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(&init_user_ns, inode->i_uid));
+ if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID))
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(&init_user_ns, inode->i_gid));
if (mode != S_IRWXUGO)
seq_printf(m, ",mode=%o", mode);
return 0;
@@ -625,15 +632,21 @@ static const struct super_operations bpf_super_ops = {
};
enum {
+ OPT_UID,
+ OPT_GID,
OPT_MODE,
};
static const struct fs_parameter_spec bpf_fs_parameters[] = {
+ fsparam_u32 ("uid", OPT_UID),
+ fsparam_u32 ("gid", OPT_GID),
fsparam_u32oct ("mode", OPT_MODE),
{}
};
struct bpf_mount_opts {
+ kuid_t uid;
+ kgid_t gid;
umode_t mode;
};
@@ -641,6 +654,8 @@ static int bpf_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
struct bpf_mount_opts *opts = fc->fs_private;
struct fs_parse_result result;
+ kuid_t uid;
+ kgid_t gid;
int opt;
opt = fs_parse(fc, bpf_fs_parameters, param, &result);
@@ -662,12 +677,42 @@ static int bpf_parse_param(struct fs_context *fc, struct fs_parameter *param)
}
switch (opt) {
+ case OPT_UID:
+ uid = make_kuid(current_user_ns(), result.uint_32);
+ if (!uid_valid(uid))
+ goto bad_value;
+
+ /*
+ * The requested uid must be representable in the
+ * filesystem's idmapping.
+ */
+ if (!kuid_has_mapping(fc->user_ns, uid))
+ goto bad_value;
+
+ opts->uid = uid;
+ break;
+ case OPT_GID:
+ gid = make_kgid(current_user_ns(), result.uint_32);
+ if (!gid_valid(gid))
+ goto bad_value;
+
+ /*
+ * The requested gid must be representable in the
+ * filesystem's idmapping.
+ */
+ if (!kgid_has_mapping(fc->user_ns, gid))
+ goto bad_value;
+
+ opts->gid = gid;
+ break;
case OPT_MODE:
opts->mode = result.uint_32 & S_IALLUGO;
break;
}
return 0;
+bad_value:
+ return invalfc(fc, "Bad value for '%s'", param->key);
}
struct bpf_preload_ops *bpf_preload_ops;
@@ -750,6 +795,8 @@ static int bpf_fill_super(struct super_block *sb, struct fs_context *fc)
sb->s_op = &bpf_super_ops;
inode = sb->s_root->d_inode;
+ inode->i_uid = opts->uid;
+ inode->i_gid = opts->gid;
inode->i_op = &bpf_dir_iops;
inode->i_mode &= ~S_IALLUGO;
populate_bpffs(sb->s_root);
@@ -785,6 +832,8 @@ static int bpf_init_fs_context(struct fs_context *fc)
return -ENOMEM;
opts->mode = S_IRWXUGO;
+ opts->uid = current_fsuid();
+ opts->gid = current_fsgid();
fc->fs_private = opts;
fc->ops = &bpf_context_ops;
For a clean, conflict-free revert of the token-related patches in commit d17aff807f84 ("Revert BPF token-related functionality"), the bpf fs commit 750e785796bb ("bpf: Support uid and gid when mounting bpffs") was undone temporarily as well. This patch manually re-adds the functionality from the original one back in 750e785796bb, no other functional changes intended. Testing: # mount -t bpf -o uid=65534,gid=65534 bpffs ./foo # ls -la . | grep foo drwxrwxrwt 2 nobody nogroup 0 Dec 20 13:16 foo # mount -t bpf bpffs on /root/foo type bpf (rw,relatime,uid=65534,gid=65534) Also, passing invalid arguments for uid/gid are properly rejected as expected. Fixes: d17aff807f84 ("Revert BPF token-related functionality") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Cc: Christian Brauner <brauner@kernel.org> Cc: Jie Jiang <jiejiang@chromium.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: linux-fsdevel@vger.kernel.org --- kernel/bpf/inode.c | 53 ++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 51 insertions(+), 2 deletions(-)