Re: [syzbot] [integrity?] [lsm?] KMSAN: uninit-value in ima_add_template_entry (2)
From: syzbot
Date: Sun Oct 13 2024 - 15:06:38 EST
syzbot has found a reproducer for the following issue on:
HEAD commit: 36c254515dc6 Merge tag 'powerpc-6.12-4' of git://git.kerne..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13ba885f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=981fe2ff8a1e457a
dashboard link: https://syzkaller.appspot.com/bug?extid=91ae49e1c1a2634d20c0
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10eb8727980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=157e5087980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ea807517ae2f/disk-36c25451.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/5f30861c9c3c/vmlinux-36c25451.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8b5ef63bff6f/bzImage-36c25451.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/5402f23c14ef/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+91ae49e1c1a2634d20c0@xxxxxxxxxxxxxxxxxxxxxxxxx
=====================================================
BUG: KMSAN: uninit-value in ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
ima_add_template_entry+0x52b/0x880 security/integrity/ima/ima_queue.c:172
ima_store_template security/integrity/ima/ima_api.c:122 [inline]
ima_store_measurement+0x36b/0x8d0 security/integrity/ima/ima_api.c:383
process_measurement+0x2c11/0x3f30 security/integrity/ima/ima_main.c:380
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
<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/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
sha256_transform lib/crypto/sha256.c:117 [inline]
sha256_transform_blocks+0x2dbf/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
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+0xf33/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
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/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
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+0xfb5/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
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+0x2c35/0x2e90 lib/crypto/sha256.c:127
lib_sha256_base_do_update include/crypto/sha256_base.h:63 [inline]
sha256_update+0x2ff/0x340 lib/crypto/sha256.c:136
crypto_sha256_update+0x37/0x60 crypto/sha256_generic.c:39
crypto_shash_update+0x79/0xa0 crypto/shash.c:52
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:491 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1804/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was stored to memory at:
memcpy_to_iter lib/iov_iter.c:65 [inline]
iterate_kvec include/linux/iov_iter.h:86 [inline]
iterate_and_advance2 include/linux/iov_iter.h:306 [inline]
iterate_and_advance include/linux/iov_iter.h:328 [inline]
_copy_to_iter+0x124a/0x2b30 lib/iov_iter.c:185
copy_page_to_iter+0x419/0x880 lib/iov_iter.c:362
copy_folio_to_iter include/linux/uio.h:189 [inline]
filemap_read+0xc13/0x1500 mm/filemap.c:2696
generic_file_read_iter+0x136/0xad0 mm/filemap.c:2833
__kernel_read+0x726/0xd30 fs/read_write.c:527
integrity_kernel_read+0x77/0x90 security/integrity/iint.c:28
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
ima_calc_file_hash+0x1731/0x3c90 security/integrity/ima/ima_crypto.c:568
ima_collect_measurement+0x464/0xd20 security/integrity/ima/ima_api.c:293
process_measurement+0x2948/0x3f30 security/integrity/ima/ima_main.c:372
ima_file_check+0xb4/0x100 security/integrity/ima/ima_main.c:572
security_file_post_open+0xc6/0x540 security/security.c:3129
do_open fs/namei.c:3776 [inline]
path_openat+0x58cc/0x6200 fs/namei.c:3933
do_filp_open+0x20e/0x590 fs/namei.c:3960
do_sys_openat2+0x1bf/0x2f0 fs/open.c:1415
do_sys_open fs/open.c:1430 [inline]
__do_sys_open fs/open.c:1438 [inline]
__se_sys_open fs/open.c:1434 [inline]
__x64_sys_open+0x275/0x2d0 fs/open.c:1434
x64_sys_call+0x15a2/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:3
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Uninit was created at:
__alloc_pages_noprof+0x9a7/0xe00 mm/page_alloc.c:4756
alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265
alloc_pages_noprof mm/mempolicy.c:2345 [inline]
folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2352
filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1010
__filemap_get_folio+0xac4/0x1550 mm/filemap.c:1952
block_write_begin+0x6e/0x2b0 fs/buffer.c:2226
exfat_write_begin+0xfb/0x400 fs/exfat/inode.c:434
exfat_extend_valid_size fs/exfat/file.c:553 [inline]
exfat_file_write_iter+0x474/0xfb0 fs/exfat/file.c:588
do_iter_readv_writev+0x88a/0xa30
vfs_writev+0x56a/0x14f0 fs/read_write.c:1064
do_pwritev fs/read_write.c:1165 [inline]
__do_sys_pwritev2 fs/read_write.c:1224 [inline]
__se_sys_pwritev2+0x280/0x470 fs/read_write.c:1215
__x64_sys_pwritev2+0x11f/0x1a0 fs/read_write.c:1215
x64_sys_call+0x2edb/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:329
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
CPU: 0 UID: 0 PID: 5186 Comm: syz-executor173 Not tainted 6.12.0-rc2-syzkaller-00307-g36c254515dc6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================
---
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#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.