[syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry

syzbot syzbot+7bc44a489f0ef0670bd5 at syzkaller.appspotmail.com
Tue Feb 20 06:41:14 UTC 2024 

Hello,

syzbot found the following issue on:

HEAD commit:    4f5e5092fdbf Merge tag 'net-6.8-rc5' of git://git.kernel.o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=135ba81c180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e3dd779fba027968
dashboard link: https://syzkaller.appspot.com/bug?extid=7bc44a489f0ef0670bd5
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/34924e0466d4/disk-4f5e5092.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/29d0b1935c61/vmlinux-4f5e5092.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2e033c3d8679/bzImage-4f5e5092.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7bc44a489f0ef0670bd5 at syzkaller.appspotmail.com

=====================================================
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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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:3643 [inline]
 path_openat+0x4d09/0x5ad0 fs/namei.c:3798
 do_filp_open+0x20d/0x590 fs/namei.c:3825
 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: 1 PID: 9243 Comm: syz-executor.3 Not tainted 6.8.0-rc4-syzkaller-00180-g4f5e5092fdbf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
=====================================================


---
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If the report is already addressed, let syzbot know by replying with:
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