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Message-ID: <0000000000001f13040612b4a2f4@google.com> Date: Sat, 02 Mar 2024 14:01:23 -0800 From: syzbot <syzbot+7bc44a489f0ef0670bd5@...kaller.appspotmail.com> To: dmitry.kasatkin@...il.com, eric.snowberg@...cle.com, jmorris@...ei.org, linux-fsdevel@...r.kernel.org, linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org, paul@...l-moore.com, roberto.sassu@...wei.com, roberto.sassu@...weicloud.com, serge@...lyn.com, syzkaller-bugs@...glegroups.com, zohar@...ux.ibm.com Subject: Re: [syzbot] [lsm?] [integrity?] KMSAN: uninit-value in ima_add_template_entry syzbot has found a reproducer for the following issue on: HEAD commit: 5ad3cb0ed525 Merge tag 'for-v6.8-rc2' of git://git.kernel... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15fdefac180000 kernel config: https://syzkaller.appspot.com/x/.config?x=80c7a82a572c0de3 dashboard link: https://syzkaller.appspot.com/bug?extid=7bc44a489f0ef0670bd5 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=11917b26180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1256096a180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a148235ac5b1/disk-5ad3cb0e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4b06f4d02ad6/vmlinux-5ad3cb0e.xz kernel image: https://storage.googleapis.com/syzbot-assets/7fff06beed25/bzImage-5ad3cb0e.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/adece4ed9c9c/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7bc44a489f0ef0670bd5@...kaller.appspotmail.com 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 ===================================================== --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
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