syzbot


KMSAN: uninit-value in nilfs_add_checksums_on_logs (2)

Status: fixed on 2024/06/11 10:02
Subsystems: nilfs
[Documentation on labels]
Reported-by: syzbot+47a017c46edb25eff048@syzkaller.appspotmail.com
Fix commit: 61b258b0d2f6 x86: call instrumentation hooks from copy_mc.c
First crash: 424d, last: 176d
Duplicate bugs (1)
duplicates (1):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
KMSAN: uninit-value in nilfs_add_checksums_on_logs (3) nilfs 3 173d 171d 0/28 closed as dup on 2024/07/16 03:50
Discussions (7)
Title Replies (including bot) Last reply
[syzbot] [nilfs?] KMSAN: uninit-value in nilfs_add_checksums_on_logs (3) 2 (3) 2024/07/16 03:49
[syzbot] [nilfs?] KMSAN: uninit-value in nilfs_add_checksums_on_logs (2) 1 (3) 2024/05/25 04:37
[syzbot] Monthly nilfs report (May 2024) 0 (1) 2024/05/06 13:18
Re: [syzbot] [nilfs?] KMSAN: uninit-value in nilfs_add_checksums_on_logs (2) 2 (2) 2024/03/06 15:03
Re: [syzbot] [nilfs?] KMSAN: uninit-value in nilfs_add_checksums_on_logs (2) 3 (3) 2024/03/06 07:12
[syzbot] Monthly nilfs report (Feb 2024) 0 (1) 2024/02/02 21:05
[syzbot] Monthly nilfs report (Jan 2024) 0 (1) 2024/01/02 13:35
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in nilfs_add_checksums_on_logs (3) nilfs 3 173d 171d 0/28 closed as dup on 2024/07/16 03:50
upstream KMSAN: uninit-value in nilfs_add_checksums_on_logs nilfs 1079 545d 638d 22/28 fixed on 2023/06/08 14:41

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in crc32_body lib/crc32.c:110 [inline]
BUG: KMSAN: uninit-value in crc32_le_generic lib/crc32.c:179 [inline]
BUG: KMSAN: uninit-value in crc32_le_base+0x43c/0xd80 lib/crc32.c:197
 crc32_body lib/crc32.c:110 [inline]
 crc32_le_generic lib/crc32.c:179 [inline]
 crc32_le_base+0x43c/0xd80 lib/crc32.c:197
 nilfs_segbuf_fill_in_data_crc fs/nilfs2/segbuf.c:224 [inline]
 nilfs_add_checksums_on_logs+0xb80/0xe40 fs/nilfs2/segbuf.c:327
 nilfs_segctor_do_construct+0x9876/0xdeb0 fs/nilfs2/segment.c:2078
 nilfs_segctor_construct+0x1eb/0xe30 fs/nilfs2/segment.c:2381
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2489 [inline]
 nilfs_segctor_thread+0xc50/0x11e0 fs/nilfs2/segment.c:2573
 kthread+0x3e2/0x540 kernel/kthread.c:388
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

Uninit was stored to memory at:
 memcpy_from_iter lib/iov_iter.c:73 [inline]
 iterate_bvec include/linux/iov_iter.h:122 [inline]
 iterate_and_advance2 include/linux/iov_iter.h:249 [inline]
 iterate_and_advance include/linux/iov_iter.h:271 [inline]
 __copy_from_iter lib/iov_iter.c:249 [inline]
 copy_page_from_iter_atomic+0x12b7/0x2b60 lib/iov_iter.c:481
 generic_perform_write+0x4c1/0xc60 mm/filemap.c:3982
 __generic_file_write_iter+0x20a/0x460 mm/filemap.c:4069
 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:4095
 __kernel_write_iter+0x68b/0xc40 fs/read_write.c:523
 dump_emit_page fs/coredump.c:890 [inline]
 dump_user_range+0x8dc/0xee0 fs/coredump.c:951
 elf_core_dump+0x520f/0x59c0 fs/binfmt_elf.c:2077
 do_coredump+0x32d5/0x4920 fs/coredump.c:764
 get_signal+0x267e/0x2d00 kernel/signal.c:2896
 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x5d/0x160 kernel/entry/common.c:218
 do_syscall_64+0xe4/0x1f0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

Uninit was created at:
 __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598
 alloc_pages_mpol+0x299/0x990 mm/mempolicy.c:2264
 alloc_pages+0x1bf/0x1e0 mm/mempolicy.c:2335
 dump_user_range+0x4a/0xee0 fs/coredump.c:935
 elf_core_dump+0x520f/0x59c0 fs/binfmt_elf.c:2077
 do_coredump+0x32d5/0x4920 fs/coredump.c:764
 get_signal+0x267e/0x2d00 kernel/signal.c:2896
 arch_do_signal_or_restart+0x53/0xcb0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x5d/0x160 kernel/entry/common.c:218
 do_syscall_64+0xe4/0x1f0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

CPU: 0 PID: 5014 Comm: segctord Not tainted 6.9.0-rc2-syzkaller-00207-ge8b0ccb2a787 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
=====================================================

Crashes (171):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/06 11:00 upstream e8b0ccb2a787 ca620dd8 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/11 07:41 upstream 614da38e2f7a 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/09 23:29 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/09 15:26 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/09 13:14 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/09 06:57 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/09 06:48 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/09 03:05 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/08 11:56 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/08 06:10 upstream 614da38e2f7a 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/03 02:21 upstream 614da38e2f7a 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/02 07:56 upstream 614da38e2f7a 3113787f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/31 02:16 upstream 614da38e2f7a 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/29 20:11 upstream 614da38e2f7a 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/27 06:53 upstream 614da38e2f7a a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/26 10:19 upstream 614da38e2f7a a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/25 16:46 upstream 614da38e2f7a a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/19 17:30 upstream 614da38e2f7a c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/15 12:46 upstream 614da38e2f7a fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/12 09:48 upstream cf87f46fd34d 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/12 04:28 upstream cf87f46fd34d 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/04 10:49 upstream 3d25a941ea50 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/29 16:50 upstream e67572cd2204 27e33c58 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/28 06:13 upstream 5d12ed4bea43 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/28 06:09 upstream 5d12ed4bea43 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/27 13:00 upstream 5eb4573ea63d 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/27 11:58 upstream 5eb4573ea63d 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/27 10:44 upstream 5eb4573ea63d 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/26 04:08 upstream e33c4963bf53 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/25 05:02 upstream e88c4cfcb7b8 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/23 23:24 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/23 22:24 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/23 12:20 upstream 4d2008430ce8 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/21 11:40 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/20 14:45 upstream 13a2e429f644 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/19 03:28 upstream 8cd26fd90c1a af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/17 14:54 upstream 96fca68c4fbf 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/17 06:15 upstream 96fca68c4fbf 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/17 02:02 upstream 96fca68c4fbf 18f6e127 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2023/12/26 22:03 upstream fbafc3e621c3 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/06/07 18:06 upstream 101b7a97143a 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/05/19 19:37 upstream 101b7a97143a c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/24 01:40 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/24 01:38 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2024/04/22 08:18 upstream 48cf398f15fc af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in nilfs_add_checksums_on_logs
2023/12/03 22:26 upstream 33cc938e65a9 f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in nilfs_add_checksums_on_logs
* Struck through repros no longer work on HEAD.