===================================================== BUG: KMSAN: uninit-value in __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline] BUG: KMSAN: uninit-value in __fswab32 include/uapi/linux/swab.h:60 [inline] BUG: KMSAN: uninit-value in __swab32p include/uapi/linux/swab.h:189 [inline] BUG: KMSAN: uninit-value in __be32_to_cpup include/uapi/linux/byteorder/little_endian.h:82 [inline] BUG: KMSAN: uninit-value in get_unaligned_be32 include/linux/unaligned/access_ok.h:30 [inline] BUG: KMSAN: uninit-value in LOAD_OP lib/crypto/sha256.c:38 [inline] BUG: KMSAN: uninit-value in sha256_transform lib/crypto/sha256.c:54 [inline] BUG: KMSAN: uninit-value in sha256_update+0x8bf0/0x9090 lib/crypto/sha256.c:227 CPU: 0 PID: 25278 Comm: syz-executor.3 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1df/0x240 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 __arch_swab32 arch/x86/include/uapi/asm/swab.h:10 [inline] __fswab32 include/uapi/linux/swab.h:60 [inline] __swab32p include/uapi/linux/swab.h:189 [inline] __be32_to_cpup include/uapi/linux/byteorder/little_endian.h:82 [inline] get_unaligned_be32 include/linux/unaligned/access_ok.h:30 [inline] LOAD_OP lib/crypto/sha256.c:38 [inline] sha256_transform lib/crypto/sha256.c:54 [inline] sha256_update+0x8bf0/0x9090 lib/crypto/sha256.c:227 crypto_sha256_update+0x8b/0xb0 crypto/sha256_generic.c:51 crypto_shash_update+0x4e9/0x550 crypto/shash.c:106 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:495 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:515 [inline] ima_calc_file_hash+0x187a/0x3880 security/integrity/ima/ima_crypto.c:580 ima_collect_measurement+0x45b/0xa20 security/integrity/ima/ima_api.c:250 process_measurement+0x1a7d/0x2ce0 security/integrity/ima/ima_main.c:324 ima_file_check+0x131/0x170 security/integrity/ima/ima_main.c:492 do_open fs/namei.c:3245 [inline] path_openat+0x4b9e/0x5d50 fs/namei.c:3360 do_filp_open+0x2b8/0x710 fs/namei.c:3387 do_sys_openat2+0x96f/0xe30 fs/open.c:1179 do_sys_open fs/open.c:1195 [inline] __do_compat_sys_open fs/open.c:1242 [inline] __se_compat_sys_open+0x21b/0x280 fs/open.c:1240 __ia32_compat_sys_open+0x4a/0x70 fs/open.c:1240 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f74549 Code: Bad RIP value. RSP: 002b:00000000f5d6f0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000005 RAX: ffffffffffffffda RBX: 00000000200002c0 RCX: 0000000000042242 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 _copy_to_iter+0xd28/0x26e0 lib/iov_iter.c:631 copy_to_iter include/linux/uio.h:138 [inline] copy_page_to_iter+0x40c/0x1bb0 lib/iov_iter.c:918 generic_file_buffered_read+0x27b0/0x3650 mm/filemap.c:2130 generic_file_read_iter+0x164/0xad0 mm/filemap.c:2326 ext4_file_read_iter+0x876/0xa90 fs/ext4/file.c:74 call_read_iter include/linux/fs.h:1902 [inline] new_sync_read fs/read_write.c:415 [inline] __kernel_read+0xba3/0x1200 fs/read_write.c:438 integrity_kernel_read+0xfc/0x140 security/integrity/iint.c:191 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:484 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:515 [inline] ima_calc_file_hash+0x17ea/0x3880 security/integrity/ima/ima_crypto.c:580 ima_collect_measurement+0x45b/0xa20 security/integrity/ima/ima_api.c:250 process_measurement+0x1a7d/0x2ce0 security/integrity/ima/ima_main.c:324 ima_file_check+0x131/0x170 security/integrity/ima/ima_main.c:492 do_open fs/namei.c:3245 [inline] path_openat+0x4b9e/0x5d50 fs/namei.c:3360 do_filp_open+0x2b8/0x710 fs/namei.c:3387 do_sys_openat2+0x96f/0xe30 fs/open.c:1179 do_sys_open fs/open.c:1195 [inline] __do_compat_sys_open fs/open.c:1242 [inline] __se_compat_sys_open+0x21b/0x280 fs/open.c:1240 __ia32_compat_sys_open+0x4a/0x70 fs/open.c:1240 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 memcpy_from_page lib/iov_iter.c:468 [inline] iov_iter_copy_from_user_atomic+0x11b1/0x1780 lib/iov_iter.c:1003 generic_perform_write+0x499/0x9a0 mm/filemap.c:3326 ext4_buffered_write_iter+0x795/0xac0 fs/ext4/file.c:270 ext4_file_write_iter+0x1034/0x2dd0 fs/ext4/file.c:498 do_iter_readv_writev+0x94a/0xb10 include/linux/fs.h:1902 do_iter_write+0x303/0xdc0 fs/read_write.c:1018 vfs_iter_write+0x118/0x180 fs/read_write.c:1059 iter_file_splice_write+0xb5f/0x1800 fs/splice.c:750 do_splice_from fs/splice.c:846 [inline] direct_splice_actor+0x1fd/0x580 fs/splice.c:1016 splice_direct_to_actor+0x6b2/0xf50 fs/splice.c:971 do_splice_direct+0x342/0x580 fs/splice.c:1059 do_sendfile+0x101b/0x1d40 fs/read_write.c:1540 __do_compat_sys_sendfile fs/read_write.c:1622 [inline] __se_compat_sys_sendfile+0x301/0x3c0 fs/read_write.c:1605 __ia32_compat_sys_sendfile+0x56/0x70 fs/read_write.c:1605 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Uninit was created at: kmsan_save_stack_with_flags+0x3c/0x90 mm/kmsan/kmsan.c:144 kmsan_internal_alloc_meta_for_pages mm/kmsan/kmsan_shadow.c:269 [inline] kmsan_alloc_page+0xb9/0x180 mm/kmsan/kmsan_shadow.c:293 __alloc_pages_nodemask+0x56a2/0x5dc0 mm/page_alloc.c:4889 alloc_pages_current+0x672/0x990 mm/mempolicy.c:2292 alloc_pages include/linux/gfp.h:545 [inline] push_pipe+0x605/0xb70 lib/iov_iter.c:537 __pipe_get_pages lib/iov_iter.c:1278 [inline] pipe_get_pages_alloc lib/iov_iter.c:1385 [inline] iov_iter_get_pages_alloc+0x18a9/0x21c0 lib/iov_iter.c:1403 default_file_splice_read fs/splice.c:385 [inline] do_splice_to+0x4fc/0x14f0 fs/splice.c:871 splice_direct_to_actor+0x45c/0xf50 fs/splice.c:950 do_splice_direct+0x342/0x580 fs/splice.c:1059 do_sendfile+0x101b/0x1d40 fs/read_write.c:1540 __do_compat_sys_sendfile fs/read_write.c:1622 [inline] __se_compat_sys_sendfile+0x301/0x3c0 fs/read_write.c:1605 __ia32_compat_sys_sendfile+0x56/0x70 fs/read_write.c:1605 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c =====================================================