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KMSAN: uninit-value in hfs_find_set_zero_bits

Status: upstream: reported C repro on 2023/03/06 17:55
Labels: hfs (incorrect?)
Reported-by: syzbot+773fa9d79b29bd8b6831@syzkaller.appspotmail.com
First crash: 109d, last: 3d00h
▶ ▼ 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

Sample crash report:
loop0: detected capacity change from 0 to 64
=====================================================
BUG: KMSAN: uninit-value in hfs_find_set_zero_bits+0x836/0xc90 fs/hfs/bitmap.c:45
 hfs_find_set_zero_bits+0x836/0xc90 fs/hfs/bitmap.c:45
 hfs_vbm_search_free+0x141/0x530 fs/hfs/bitmap.c:151
 hfs_extend_file+0x6fc/0x1bf0 fs/hfs/extent.c:408
 hfs_get_block+0x400/0x1020 fs/hfs/extent.c:353
 __block_write_begin_int+0x6b1/0x2670 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin+0x143/0x450 fs/buffer.c:2102
 cont_write_begin+0xa64/0xe60 fs/buffer.c:2456
 hfs_write_begin+0x9a/0x130 fs/hfs/inode.c:58
 generic_perform_write+0x3f5/0xbf0 mm/filemap.c:3773
 __generic_file_write_iter+0x393/0x920 mm/filemap.c:3901
 generic_file_write_iter+0x103/0x5b0 mm/filemap.c:3933
 call_write_iter include/linux/fs.h:2189 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x834/0x1580 fs/read_write.c:584
 ksys_write+0x21f/0x4f0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __ia32_sys_write+0x91/0xd0 fs/read_write.c:646
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 slab_post_alloc_hook+0x12d/0xb60 mm/slab.h:766
 slab_alloc_node mm/slub.c:3452 [inline]
 __kmem_cache_alloc_node+0x518/0x920 mm/slub.c:3491
 kmalloc_trace+0x51/0x200 mm/slab_common.c:1062
 kmalloc include/linux/slab.h:580 [inline]
 hfs_mdb_get+0x1c4e/0x29b0 fs/hfs/mdb.c:175
 hfs_fill_super+0x1d78/0x2460 fs/hfs/super.c:406
 mount_bdev+0x50e/0x840 fs/super.c:1359
 hfs_mount+0x4d/0x60 fs/hfs/super.c:456
 legacy_get_tree+0x110/0x290 fs/fs_context.c:610
 vfs_get_tree+0xa5/0x500 fs/super.c:1489
 do_new_mount+0x69a/0x1580 fs/namespace.c:3145
 path_mount+0x725/0x1ec0 fs/namespace.c:3475
 do_mount fs/namespace.c:3488 [inline]
 __do_sys_mount fs/namespace.c:3697 [inline]
 __se_sys_mount+0x734/0x840 fs/namespace.c:3674
 __ia32_sys_mount+0xe3/0x150 fs/namespace.c:3674
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 1 PID: 5030 Comm: syz-executor199 Not tainted 6.2.0-syzkaller-81157-g944070199c5e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
=====================================================

Crashes (77):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
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
2023/05/29 00:36 https://github.com/google/kmsan.git master f93f2feda5d6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/28 23:25 https://github.com/google/kmsan.git master f93f2feda5d6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/28 21:20 https://github.com/google/kmsan.git master f93f2feda5d6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/28 19:10 https://github.com/google/kmsan.git master f93f2feda5d6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/28 14:27 https://github.com/google/kmsan.git master f93f2feda5d6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/28 00:53 https://github.com/google/kmsan.git master f93f2feda5d6 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/23 17:29 https://github.com/google/kmsan.git master f93f2feda5d6 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/23 06:17 https://github.com/google/kmsan.git master f93f2feda5d6 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/22 08:46 https://github.com/google/kmsan.git master dad188c049f8 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/22 02:37 https://github.com/google/kmsan.git master dad188c049f8 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/17 02:20 https://github.com/google/kmsan.git master dad188c049f8 11c89444 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/08 06:14 https://github.com/google/kmsan.git master 81af97bdef5e 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/06 15:57 https://github.com/google/kmsan.git master 81af97bdef5e 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/05 16:21 https://github.com/google/kmsan.git master 81af97bdef5e 518a39a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/05/05 06:54 https://github.com/google/kmsan.git master 81af97bdef5e 518a39a6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/30 18:54 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/29 23:07 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/29 18:28 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/29 15:35 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/29 13:32 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/29 05:41 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/29 04:28 https://github.com/google/kmsan.git master 81af97bdef5e 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/28 20:48 https://github.com/google/kmsan.git master 81af97bdef5e 457a6e0a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/03 04:17 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/04/02 12:00 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/30 10:26 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/30 10:08 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/30 10:08 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/30 09:58 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/30 09:58 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/30 02:33 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/29 20:12 https://github.com/google/kmsan.git master 90ea0df61c98 f325deb0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/27 18:06 https://github.com/google/kmsan.git master 90ea0df61c98 f8f96aa9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/26 12:19 https://github.com/google/kmsan.git master 90ea0df61c98 fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/26 12:11 https://github.com/google/kmsan.git master 90ea0df61c98 fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/25 21:23 https://github.com/google/kmsan.git master 90ea0df61c98 fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/25 21:23 https://github.com/google/kmsan.git master 90ea0df61c98 fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/25 08:58 https://github.com/google/kmsan.git master 90ea0df61c98 fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/25 08:37 https://github.com/google/kmsan.git master 90ea0df61c98 fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/23 08:23 https://github.com/google/kmsan.git master 90ea0df61c98 f94b4a29 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/23 08:23 https://github.com/google/kmsan.git master 90ea0df61c98 f94b4a29 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/23 08:23 https://github.com/google/kmsan.git master 90ea0df61c98 f94b4a29 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/22 06:19 https://github.com/google/kmsan.git master 90ea0df61c98 8b4eb097 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/22 06:01 https://github.com/google/kmsan.git master 90ea0df61c98 8b4eb097 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/22 05:59 https://github.com/google/kmsan.git master 90ea0df61c98 8b4eb097 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/22 05:59 https://github.com/google/kmsan.git master 90ea0df61c98 8b4eb097 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/22 05:57 https://github.com/google/kmsan.git master 90ea0df61c98 8b4eb097 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/05 15:44 https://github.com/google/kmsan.git master 944070199c5e f8902b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/04 22:45 https://github.com/google/kmsan.git master 944070199c5e f8902b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/02 21:36 https://github.com/google/kmsan.git master 944070199c5e f8902b57 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/03/01 01:36 https://github.com/google/kmsan.git master 97e36f4aa06f 95aee97a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/28 20:58 https://github.com/google/kmsan.git master 97e36f4aa06f 95aee97a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/28 12:30 https://github.com/google/kmsan.git master 97e36f4aa06f 95aee97a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/26 09:13 https://github.com/google/kmsan.git master 97e36f4aa06f ee50e71c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/16 18:08 https://github.com/google/kmsan.git master 9c866a280876 7338e3c4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/15 02:51 https://github.com/google/kmsan.git master da13c00eebfb 1d6b4af7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/11 20:44 https://github.com/google/kmsan.git master 8c89ecf5c13b 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/11 20:43 https://github.com/google/kmsan.git master 8c89ecf5c13b 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/11 20:43 https://github.com/google/kmsan.git master 8c89ecf5c13b 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/11 20:34 https://github.com/google/kmsan.git master 8c89ecf5c13b 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/11 20:32 https://github.com/google/kmsan.git master 8c89ecf5c13b 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386 KMSAN: uninit-value in hfs_find_set_zero_bits
2023/02/11 02:04 https://github.com/google/kmsan.git master 8c89ecf5c13b 95871dcc .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.