KMSAN: uninit-value in ima_add_template_entry

Status: fixed on 2024/04/10 03:59
Subsystems: erofs
[Documentation on labels]
Reported-by: syzbot+7bc44a489f0ef0670bd5@syzkaller.appspotmail.com
Fix commit: 893e5e9b7369 erofs: fix uninitialized page cache reported by KMSAN
First crash: 938d, last: 872d
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] erofs: fix uninitialized page cache reported by KMSAN 5 (6) 2024/03/07 01:04
[syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry 4 (6) 2024/03/04 08:15
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in ima_add_template_entry (3) integrity lsm 7 syz 27 361d 435d 0/29 auto-obsoleted due to no activity on 2025/10/06 11:35
upstream KMSAN: uninit-value in ima_add_template_entry (2) exfat 7 C 123 450d 660d 28/29 fixed on 2025/05/06 15:33
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/03/04 06:04 26m hsiangkao@linux.alibaba.com git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git dev-test OK log

Sample crash report:
erofs: (device loop0): mounted with root inode @ nid 36.
=====================================================
BUG: KMSAN: uninit-value in ima_add_template_entry+0x52b/0x870 security/integrity/ima/ima_queue.c:172
 ima_add_template_entry+0x52b/0x870 security/integrity/ima/ima_queue.c:172
 ima_store_template security/integrity/ima/ima_api.c:122 [inline]
 ima_store_measurement+0x371/0x8d0 security/integrity/ima/ima_api.c:376
 process_measurement+0x2c6e/0x3ef0 security/integrity/ima/ima_main.c:367
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

<Zero or more stacks not recorded to save memory>

Uninit was stored to memory at:
 sha256_transform lib/crypto/sha256.c:117 [inline]
 sha256_transform_blocks+0x2dbf/0x2e80 lib/crypto/sha256.c:127
 lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
 sha256_update+0x2fb/0x340 lib/crypto/sha256.c:136
 crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
 crypto_shash_update+0x75/0xa0 crypto/shash.c:70
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:496 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1816/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 sha256_transform lib/crypto/sha256.c:117 [inline]
 sha256_transform_blocks+0x2dbf/0x2e80 lib/crypto/sha256.c:127
 lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
 sha256_update+0x2fb/0x340 lib/crypto/sha256.c:136
 crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
 crypto_shash_update+0x75/0xa0 crypto/shash.c:70
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:496 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1816/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 BLEND_OP lib/crypto/sha256.c:61 [inline]
 sha256_transform lib/crypto/sha256.c:91 [inline]
 sha256_transform_blocks+0xf33/0x2e80 lib/crypto/sha256.c:127
 lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
 sha256_update+0x2fb/0x340 lib/crypto/sha256.c:136
 crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
 crypto_shash_update+0x75/0xa0 crypto/shash.c:70
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:496 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1816/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 BLEND_OP lib/crypto/sha256.c:61 [inline]
 sha256_transform lib/crypto/sha256.c:92 [inline]
 sha256_transform_blocks+0xf7d/0x2e80 lib/crypto/sha256.c:127
 lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
 sha256_update+0x2fb/0x340 lib/crypto/sha256.c:136
 crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
 crypto_shash_update+0x75/0xa0 crypto/shash.c:70
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:496 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1816/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 BLEND_OP lib/crypto/sha256.c:61 [inline]
 sha256_transform lib/crypto/sha256.c:93 [inline]
 sha256_transform_blocks+0xfb5/0x2e80 lib/crypto/sha256.c:127
 lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
 sha256_update+0x2fb/0x340 lib/crypto/sha256.c:136
 crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
 crypto_shash_update+0x75/0xa0 crypto/shash.c:70
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:496 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1816/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 LOAD_OP lib/crypto/sha256.c:56 [inline]
 sha256_transform lib/crypto/sha256.c:82 [inline]
 sha256_transform_blocks+0x2c35/0x2e80 lib/crypto/sha256.c:127
 lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
 sha256_update+0x2fb/0x340 lib/crypto/sha256.c:136
 crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
 crypto_shash_update+0x75/0xa0 crypto/shash.c:70
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:496 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1816/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was stored to memory at:
 memcpy_to_iter lib/iov_iter.c:65 [inline]
 iterate_kvec include/linux/iov_iter.h:85 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:251 [inline]
 iterate_and_advance include/linux/iov_iter.h:271 [inline]
 _copy_to_iter+0x125a/0x2520 lib/iov_iter.c:186
 copy_page_to_iter+0x419/0x870 lib/iov_iter.c:381
 copy_folio_to_iter include/linux/uio.h:181 [inline]
 filemap_read+0xbf4/0x14d0 mm/filemap.c:2654
 generic_file_read_iter+0x136/0xad0 mm/filemap.c:2784
 __kernel_read+0x724/0xce0 fs/read_write.c:434
 integrity_kernel_read+0x77/0x90 security/integrity/iint.c:221
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1743/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was created at:
 __alloc_pages+0x9a6/0xe00 mm/page_alloc.c:4590
 alloc_pages_mpol+0x62b/0x9d0 mm/mempolicy.c:2133
 alloc_pages mm/mempolicy.c:2204 [inline]
 folio_alloc+0x1da/0x380 mm/mempolicy.c:2211
 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:975
 page_cache_ra_unbounded+0x2cc/0x960 mm/readahead.c:247
 do_page_cache_ra mm/readahead.c:299 [inline]
 page_cache_ra_order+0xe31/0xee0 mm/readahead.c:544
 ondemand_readahead+0x157d/0x1750 mm/readahead.c:666
 page_cache_sync_ra+0x724/0x760 mm/readahead.c:693
 page_cache_sync_readahead include/linux/pagemap.h:1300 [inline]
 filemap_get_pages+0x4c4/0x2bd0 mm/filemap.c:2498
 filemap_read+0x59e/0x14d0 mm/filemap.c:2594
 generic_file_read_iter+0x136/0xad0 mm/filemap.c:2784
 __kernel_read+0x724/0xce0 fs/read_write.c:434
 integrity_kernel_read+0x77/0x90 security/integrity/iint.c:221
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0x1743/0x3cc0 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x44d/0xdd0 security/integrity/ima/ima_api.c:290
 process_measurement+0x2936/0x3ef0 security/integrity/ima/ima_main.c:359
 ima_file_check+0xb3/0x100 security/integrity/ima/ima_main.c:557
 do_open fs/namei.c:3647 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3802
 do_filp_open+0x20d/0x590 fs/namei.c:3829
 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1404
 do_sys_open fs/open.c:1419 [inline]
 __do_sys_open fs/open.c:1427 [inline]
 __se_sys_open fs/open.c:1423 [inline]
 __x64_sys_open+0x275/0x2d0 fs/open.c:1423
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 0 PID: 5012 Comm: syz-executor394 Not tainted 6.8.0-rc6-syzkaller-00238-g5ad3cb0ed525 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
=====================================================

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/02 22:01 upstream 5ad3cb0ed525 25905f5d .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ima_add_template_entry
2024/02/16 06:32 upstream 4f5e5092fdbf 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ima_add_template_entry
2023/12/29 05:16 upstream 505e701c0b2c fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in ima_add_template_entry
2024/03/04 03:07 upstream e4f79000952e 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ima_add_template_entry
2024/02/16 10:16 upstream 4f5e5092fdbf 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in ima_add_template_entry
* Struck through repros no longer work on HEAD.