syzbot

 sign-in | mailing list | source | docs
🐞 Open [1641]
≡ Subsystems
🐞 Fixed [6108]
🐞 Invalid [15307]
⬇ Missing Backports [171]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

KMSAN: uninit-value in longest_match_std (2)

Status: upstream: reported C repro on 2024/01/09 18:17
Subsystems: ntfs3
[Documentation on labels]
Reported-by: syzbot+08d8956768c96a2c52cf@syzkaller.appspotmail.com
First crash: 452d, last: 1h03m
▶ ▼ Discussions (11)
Title Replies (including bot) Last reply
[syzbot] Monthly ntfs3 report (Mar 2025) 0 (1) 2025/03/18 14:49
Re: [syzbot] [ntfs3?] KMSAN: uninit-value in longest_match_std (2) 1 (2) 2025/02/03 08:14
[syzbot] [ntfs3?] KMSAN: uninit-value in longest_match_std (2) 0 (2) 2025/01/29 05:28
[syzbot] Monthly ntfs3 report (Jan 2025) 0 (1) 2025/01/15 08:54
[syzbot] Monthly ntfs3 report (Dec 2024) 0 (1) 2024/12/16 09:44
[syzbot] Monthly ntfs3 report (Nov 2024) 0 (1) 2024/11/13 11:07
[syzbot] Monthly ntfs3 report (Jun 2024) 0 (1) 2024/06/10 12:41
[syzbot] Monthly ntfs3 report (May 2024) 0 (1) 2024/05/06 13:18
[syzbot] Monthly ntfs3 report (Apr 2024) 0 (1) 2024/04/05 12:38
[syzbot] Monthly ntfs3 report (Mar 2024) 0 (1) 2024/03/05 11:09
[syzbot] Monthly ntfs3 report (Feb 2024) 0 (1) 2024/02/02 21:04
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in longest_match_std ntfs3 1360 525d 632d 0/28 auto-obsoleted due to no activity on 2023/12/09 02:47
upstream KMSAN: kernel-infoleak in _copy_to_iter (7) net C 138977 762d 1114d 22/28 fixed on 2023/02/24 13:50
upstream KMSAN: uninit-value in __crc32c_le_base (2) crypto C 6207 725d 1797d 0/28 closed as invalid on 2023/04/06 23:31
upstream KMSAN: kernel-infoleak in _copy_to_iter (8) mm C 21180 658d 752d 22/28 fixed on 2023/06/08 14:41
▶ ▼ Last patch testing requests (9)
Created Duration User Patch Repo Result
2025/02/03 07:29 28m gauthamgujjula@gmail.com patch upstream error
2025/01/29 05:28 5h12m gauthamgujjula@gmail.com patch upstream error
2024/09/07 20:13 28m retest repro upstream OK log
2024/09/07 20:13 33m retest repro upstream OK log
2024/08/05 19:45 27m retest repro upstream OK log
2024/08/05 19:45 27m retest repro upstream OK log
2024/08/05 19:45 30m retest repro upstream OK log
2024/06/29 19:30 22m retest repro upstream error
2024/06/29 19:30 22m retest repro upstream error

Sample crash report:
=====================================================
BUG: KMSAN: uninit-value in get_match_len fs/ntfs3/lznt.c:43 [inline]
BUG: KMSAN: uninit-value in longest_match_std+0x56b/0xe00 fs/ntfs3/lznt.c:64
 get_match_len fs/ntfs3/lznt.c:43 [inline]
 longest_match_std+0x56b/0xe00 fs/ntfs3/lznt.c:64
 compress_chunk fs/ntfs3/lznt.c:170 [inline]
 compress_lznt+0x41f/0xef0 fs/ntfs3/lznt.c:339
 ni_write_frame+0xf8f/0x1c80 fs/ntfs3/frecord.c:2830
 ntfs_compress_write+0x265b/0x3a20 fs/ntfs3/file.c:1153
 ntfs_file_write_iter+0x9f3/0xe60 fs/ntfs3/file.c:1266
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xb2b/0x1540 fs/read_write.c:679
 ksys_write+0x240/0x4b0 fs/read_write.c:731
 __do_sys_write fs/read_write.c:742 [inline]
 __se_sys_write fs/read_write.c:739 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:739
 x64_sys_call+0x3161/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:2
 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:4776
 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:1000
 __filemap_get_folio+0xac4/0x1550 mm/filemap.c:1942
 ntfs_get_frame_pages+0xd6/0x6b0 fs/ntfs3/file.c:945
 ntfs_compress_write+0x1cd2/0x3a20 fs/ntfs3/file.c:1101
 ntfs_file_write_iter+0x9f3/0xe60 fs/ntfs3/file.c:1266
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xb2b/0x1540 fs/read_write.c:679
 ksys_write+0x240/0x4b0 fs/read_write.c:731
 __do_sys_write fs/read_write.c:742 [inline]
 __se_sys_write fs/read_write.c:739 [inline]
 __x64_sys_write+0x93/0xe0 fs/read_write.c:739
 x64_sys_call+0x3161/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:2
 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: 5781 Comm: syz-executor664 Not tainted 6.13.0-rc6-syzkaller-00036-gfbfd64d25c7a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================

Crashes (12203):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/07 07:46 upstream fbfd64d25c7a f3558dbf .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2024/09/29 05:43 upstream 3efc57369a0c ba29ff75 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2024/07/21 23:31 upstream 2c9b3512402e b88348e9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2024/07/21 21:07 upstream 2c9b3512402e b88348e9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2024/07/21 15:24 upstream 2c9b3512402e b88348e9 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2024/04/12 02:09 upstream e8c39d0f57f3 478efa7f .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2024/01/02 15:04 upstream 610a9b8f49fb fb427a07 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/28 05:23 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/28 04:00 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/28 03:34 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/28 00:33 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/27 21:19 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/27 14:03 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/27 11:01 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/27 09:51 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/27 00:01 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 22:21 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 20:41 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 16:34 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 15:22 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 12:42 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 07:51 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 06:24 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/26 04:30 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/25 18:45 upstream 327ecdbc0fda 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/25 16:28 upstream 327ecdbc0fda 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/25 12:49 upstream 327ecdbc0fda 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/25 09:22 upstream 327ecdbc0fda 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/25 03:25 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/25 02:05 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/24 20:48 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/24 14:58 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/24 13:05 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/24 07:12 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/24 07:09 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/23 23:55 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/23 21:56 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/23 20:27 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/23 18:42 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/23 15:34 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/23 12:22 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in longest_match_std
2025/03/27 12:30 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/26 18:57 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/26 17:27 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/26 11:32 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/25 19:17 upstream 327ecdbc0fda 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/25 05:25 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/24 23:12 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/24 11:22 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/23 22:53 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2025/03/23 17:13 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
2023/12/31 06:39 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in longest_match_std
* Struck through repros no longer work on HEAD.