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Message-ID: <675e2ff0.050a0220.37aaf.00e1.GAE@google.com> Date: Sat, 14 Dec 2024 17:25:04 -0800 From: syzbot <syzbot+3c88ea590c13f5f92152@...kaller.appspotmail.com> To: linux-kernel@...r.kernel.org, qasdev00@...il.com, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [bcachefs?] KMSAN: uninit-value in LZ4_decompress_safe_partial Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in ima_add_template_entry bcachefs (loop0): stripes_read... done bcachefs (loop0): snapshots_read... done bcachefs (loop0): check_allocations... done bcachefs (loop0): going read-write bcachefs (loop0): done starting filesystem ===================================================== 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+0x2c13/0x3f30 security/integrity/ima/ima_main.c:380 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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+0x1248/0x2b30 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+0xc65/0x1560 mm/filemap.c:2697 bch2_read_iter+0x1a90/0x2010 fs/bcachefs/fs-io-direct.c:208 __kernel_read+0x726/0xd30 fs/read_write.c:523 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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:4774 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2269 alloc_pages_noprof mm/mempolicy.c:2348 [inline] folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2355 filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1009 ra_alloc_folio mm/readahead.c:439 [inline] page_cache_ra_order+0x893/0x1250 mm/readahead.c:506 page_cache_sync_ra+0xed1/0x11a0 mm/readahead.c:612 page_cache_sync_readahead include/linux/pagemap.h:1397 [inline] filemap_get_pages+0x5a8/0x3860 mm/filemap.c:2546 filemap_read+0x613/0x1560 mm/filemap.c:2646 bch2_read_iter+0x1a90/0x2010 fs/bcachefs/fs-io-direct.c:208 __kernel_read+0x726/0xd30 fs/read_write.c:523 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+0x294a/0x3f30 security/integrity/ima/ima_main.c:372 ima_file_check+0x8e/0xd0 security/integrity/ima/ima_main.c:572 security_file_post_open+0xc6/0x540 security/security.c:3121 do_open fs/namei.c:3830 [inline] path_openat+0x58cc/0x6200 fs/namei.c:3987 do_filp_open+0x268/0x600 fs/namei.c:4014 do_sys_openat2+0x1bf/0x2f0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x2a1/0x310 fs/open.c:1428 x64_sys_call+0x36f5/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:258 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: 1 UID: 0 PID: 8047 Comm: syz-executor129 Not tainted 6.13.0-rc2-syzkaller-00362-g2d8308bf5b67-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 ===================================================== Tested on: commit: 2d8308bf Merge tag 'scsi-fixes' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=171c4344580000 kernel config: https://syzkaller.appspot.com/x/.config?x=95d0bb0535bcaca0 dashboard link: https://syzkaller.appspot.com/bug?extid=3c88ea590c13f5f92152 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=12b0fbe8580000
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