syzbot


KMSAN: uninit-value in hfs_find_set_zero_bits

Status: upstream: reported C repro on 2023/03/06 17:55
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+773fa9d79b29bd8b6831@syzkaller.appspotmail.com
First crash: 402d, last: 3d07h
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [hfs?] KMSAN: uninit-value in hfs_find_set_zero_bits 0 (1) 2023/03/06 17:55
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/01/19 18:28 21m retest repro upstream error OK
2024/01/19 18:28 1h35m retest repro upstream error OK
2023/09/07 13:16 16m retest repro upstream report log

Sample crash report:
loop0: detected capacity change from 0 to 64
=====================================================
BUG: KMSAN: uninit-value in hfs_find_set_zero_bits+0x836/0xca0 fs/hfs/bitmap.c:45
 hfs_find_set_zero_bits+0x836/0xca0 fs/hfs/bitmap.c:45
 hfs_vbm_search_free+0x141/0x530 fs/hfs/bitmap.c:151
 hfs_extend_file+0x69e/0x19f0 fs/hfs/extent.c:408
 hfs_get_block+0x3d8/0xf50 fs/hfs/extent.c:353
 __block_write_begin_int+0xa6b/0x2f80 fs/buffer.c:2105
 __block_write_begin fs/buffer.c:2154 [inline]
 block_write_begin+0x143/0x450 fs/buffer.c:2213
 cont_write_begin+0xcc0/0x1320 fs/buffer.c:2567
 hfs_write_begin+0x9a/0x140 fs/hfs/inode.c:53
 cont_expand_zero fs/buffer.c:2494 [inline]
 cont_write_begin+0x341/0x1320 fs/buffer.c:2557
 hfs_write_begin+0x9a/0x140 fs/hfs/inode.c:53
 hfs_file_truncate+0x1a5/0xd30 fs/hfs/extent.c:494
 hfs_inode_setattr+0x998/0xab0 fs/hfs/inode.c:652
 notify_change+0x1a07/0x1af0 fs/attr.c:497
 do_truncate fs/open.c:65 [inline]
 do_ftruncate+0x8d3/0xc00 fs/open.c:181
 do_sys_ftruncate fs/open.c:199 [inline]
 __do_sys_ftruncate fs/open.c:207 [inline]
 __se_sys_ftruncate fs/open.c:205 [inline]
 __x64_sys_ftruncate+0x133/0x280 fs/open.c:205
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3804 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 kmalloc_trace+0x578/0xba0 mm/slub.c:3992
 kmalloc include/linux/slab.h:628 [inline]
 hfs_mdb_get+0x1bd4/0x28b0 fs/hfs/mdb.c:175
 hfs_fill_super+0x1cf6/0x23c0 fs/hfs/super.c:406
 mount_bdev+0x397/0x520 fs/super.c:1658
 hfs_mount+0x4d/0x60 fs/hfs/super.c:456
 legacy_get_tree+0x114/0x290 fs/fs_context.c:662
 vfs_get_tree+0xa7/0x570 fs/super.c:1779
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352
 path_mount+0x742/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount+0x725/0x810 fs/namespace.c:3875
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

CPU: 1 PID: 4999 Comm: syz-executor240 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
=====================================================

Crashes (250):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/14 20:23 upstream 480e035fc4c7 d615901c .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/27 12:51 upstream fbafc3e621c3 fb427a07 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/02 22:57 https://github.com/google/kmsan.git master 944070199c5e f8902b57 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/15 23:23 upstream e5eb28f6d1af d615901c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/13 12:31 upstream 9187210eee7d db5b7ff0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/10 07:16 upstream 005f6f34bd47 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/06 18:56 upstream 5847c9777c30 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/06 06:04 upstream 29cd507cbec2 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/04 19:42 upstream 90d35da658da 3717835d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/01 18:13 upstream 87adedeba51a 352ab904 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/01 11:39 upstream 87adedeba51a 352ab904 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/26 23:22 upstream d206a76d7d27 edd6a5e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/26 19:32 upstream d206a76d7d27 edd6a5e9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/25 09:12 upstream f2e367d6ad3b 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/08 12:26 upstream 9f8413c4a66f 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/08 10:50 upstream 9f8413c4a66f 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/07 02:21 upstream 9f8413c4a66f 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/05 23:49 upstream 9f8413c4a66f 4e988e80 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/30 23:16 upstream 9f8413c4a66f 7f400fcb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/30 21:41 upstream 9f8413c4a66f 7f400fcb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/30 19:32 upstream 9f8413c4a66f 7f400fcb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/28 17:04 upstream 9f8413c4a66f cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/28 13:29 upstream 9f8413c4a66f cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/05 16:13 upstream 1f874787ed9a 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/02 10:47 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/02 04:17 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/01 16:31 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/01 01:08 upstream 2639772a11c8 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/31 12:50 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/31 08:44 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/31 02:06 upstream 453f5db0619e fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/30 15:47 upstream f016f7547aee fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/29 05:10 upstream 505e701c0b2c fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/26 19:16 upstream fbafc3e621c3 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/24 09:31 upstream 3f82f1c3a036 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/23 18:40 upstream 5254c0cbc92d fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/22 02:41 upstream a4aebe936554 4f9530a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/20 21:16 upstream 55cb5f43689d 3ad490ea .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/03/06 19:54 upstream 5847c9777c30 f39a7eed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/02/25 08:09 upstream f2e367d6ad3b 8d446f15 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_find_set_zero_bits
2024/01/02 12:29 upstream 610a9b8f49fb fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/27 15:49 upstream fbafc3e621c3 fb427a07 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/21 21:21 upstream a4aebe936554 4f9530a3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/15 05:25 upstream c7402612e2e6 3222d10c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/13 06:02 upstream eaadbbaaff74 ebcad15c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/13 04:21 upstream eaadbbaaff74 ebcad15c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/11 07:50 upstream a39b6ac3781d 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/10 07:52 upstream b10a3ccaf6e3 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/08 10:05 upstream 9ace34a8e446 28b24332 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/12/02 20:00 upstream 815fb87b7530 f819d6f7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
* Struck through repros no longer work on HEAD.