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69fc647423
linux/security
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Goldwyn Rodrigues 69fc647423 ima: return error early if file xattr cannot be changed 
During early boot, the filesystem is read-only and any changes
to xattrs are not allowed. This fails in case of ext4 because
changing xattr starts an ext4 transaction which fails with the
following warning.

WARNING: fs/ext4/ext4_jbd2.c:75 at ext4_journal_check_start+0x63/0xa0 [ext4], CPU#1: systemd-sysroot/561
CPU: 1 UID: 0 PID: 561 Comm: systemd-sysroot Not tainted 6.19.12-1-default #1 PREEMPT(voluntary) openSUSE Tumbleweed  c2dfc3c9d9f6f1233251c5d4410574fe82a348ee
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS unknown 02/02/2022
RIP: 0010:ext4_journal_check_start+0x63/0xa0 [ext4]
Call Trace:
  __ext4_journal_start_sb+0x3e/0x180 [ext4 6d025f3bc52c89a957b89a89d211fadf5e9434e1]
  ext4_xattr_set+0x104/0x150 [ext4 6d025f3bc52c89a957b89a89d211fadf5e9434e1]
  __vfs_setxattr+0x9a/0xd0
  __vfs_setxattr_noperm+0x76/0x1f0
  ima_appraise_measurement+0x23e/0xe40
  ima_d_path+0x5a/0xd0
  process_measurement+0xb29/0xc40
  ? copy_from_kernel_nofault+0x21/0xe0
  ? fscrypt_file_open+0xc0/0xe0
  ? ext4_file_open+0x60/0x490 [ext4 6d025f3bc52c89a957b89a89d211fadf5e9434e1]
  ? bpf_prog_31efb7c56239148b_restrict_filesystems+0xab/0x126
  ? __bpf_prog_exit+0x23/0xd0
  ? __bpf_tramp_exit+0xd/0x50
  ? bpf_trampoline_6442530367+0x9f/0xea
  ima_file_check+0x57/0x80
  security_file_post_open+0x50/0xf0
  path_openat+0x493/0x1650
  do_filp_open+0xc7/0x170

Detect the state of the file early and return the error.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
2026-04-27 07:24:24 -04:00
..
apparmor + Cleanups 2026-04-24 09:22:21 -07:00
bpf lsm: replace the name field with a pointer to the lsm_id struct 2025-10-22 19:24:18 -04:00
integrity ima: return error early if file xattr cannot be changed 2026-04-27 07:24:24 -04:00
ipe treewide: change inode->i_ino from unsigned long to u64 2026-03-06 14:31:28 +01:00
keys Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
landlock landlock: Clarify BUILD_BUG_ON check in scoping logic 2026-04-07 18:51:07 +02:00
loadpin Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
lockdown lockdown: move initcalls to the LSM framework 2025-10-22 19:24:27 -04:00
safesetid Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
selinux mm.git review status for linus..mm-stable 2026-04-15 12:59:16 -07:00
smack Networking changes for 7.1. 2026-04-14 18:36:10 -07:00
tomoyo tomoyo: use u64 for holding inode->i_ino value 2026-04-15 00:00:10 +09:00
yama Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
commoncap_test.c security: Add KUnit tests for kuid_root_in_ns and vfsuid_root_in_currentns 2026-01-09 11:28:28 -06:00
commoncap.c security: Add KUnit tests for kuid_root_in_ns and vfsuid_root_in_currentns 2026-01-09 11:28:28 -06:00
device_cgroup.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
inode.c securityfs: use kstrdup_const() to manage symlink targets 2026-03-17 17:13:36 -04:00
Kconfig proc: make PROC_MEM_FORCE_PTRACE the Kconfig default 2026-04-13 09:12:37 -07:00
Kconfig.hardening rust: add bitmap API. 2025-09-22 15:52:44 -04:00
lsm_audit.c treewide: change inode->i_ino from unsigned long to u64 2026-03-06 14:31:28 +01:00
lsm_init.c lsm: add backing_file LSM hooks 2026-04-03 16:53:50 -04:00
lsm_notifier.c lsm: split the notifier code out into lsm_notifier.c 2025-10-22 19:24:15 -04:00
lsm_syscalls.c lsm: rework lsm_active_cnt and lsm_idlist[] 2025-10-22 19:24:19 -04:00
lsm.h lsm: add backing_file LSM hooks 2026-04-03 16:53:50 -04:00
Makefile lsm: split the init code out into lsm_init.c 2025-10-22 19:24:16 -04:00
min_addr.c lsm: preserve /proc/sys/vm/mmap_min_addr when !CONFIG_SECURITY 2026-01-29 13:56:53 -05:00
security.c Landlock update for v7.1-rc1 2026-04-13 15:42:19 -07:00