syzbot

 sign-in | mailing list | source | docs
🐞 Open [1636]
≡ Subsystems
🐞 Fixed [6115]
🐞 Invalid [15312]
⬇ Missing Backports [172]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

KASAN: slab-out-of-bounds Write in hfs_bnode_read

Status: upstream: reported C repro on 2024/11/27 09:48
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+c6811fc2262cec1e6266@syzkaller.appspotmail.com
First crash: 125d, last: 2h52m
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: KASAN: slab-out-of-bounds Write in hfs_bnode_read (log)
Repro: C syz .config
  
▶ ▼ Discussions (2)
Title Replies (including bot) Last reply
[PATCH] hfs: check key length before reading 1 (1) 2024/11/28 12:31
[syzbot] [hfs?] KASAN: slab-out-of-bounds Write in hfs_bnode_read 1 (3) 2024/11/27 14:15
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 KASAN: slab-out-of-bounds Write in hfs_bnode_read origin:upstream C error 72 1d07h 663d 0/3 upstream: reported C repro on 2023/06/04 19:50
▶ ▼ Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/12/07 15:09 28m retest repro upstream report log
2024/12/07 15:09 17m retest repro upstream report log
2024/11/27 13:49 24m eadavis@qq.com https://github.com/ea1davis/linux hfs/syz OK log

Sample crash report:
loop0: detected capacity change from 0 to 64
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy_from_page include/linux/highmem.h:423 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read+0x167/0x200 fs/hfs/bnode.c:35
Write of size 94 at addr ffff88814679d580 by task syz-executor386/5824

CPU: 0 UID: 0 PID: 5824 Comm: syz-executor386 Not tainted 6.14.0-rc5-syzkaller-00218-g2a520073e74f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16e/0x5b0 mm/kasan/report.c:521
 kasan_report+0x143/0x180 mm/kasan/report.c:634
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 memcpy_from_page include/linux/highmem.h:423 [inline]
 hfs_bnode_read+0x167/0x200 fs/hfs/bnode.c:35
 hfs_bnode_read_key+0x172/0x240 fs/hfs/bnode.c:70
 hfs_brec_insert+0x7f3/0xbd0 fs/hfs/brec.c:159
 hfs_cat_create+0x3dc/0x760 fs/hfs/catalog.c:118
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 vfs_create+0x23c/0x3d0 fs/namei.c:3350
 do_mknodat+0x447/0x5b0 fs/namei.c:4241
 __do_sys_mknodat fs/namei.c:4269 [inline]
 __se_sys_mknodat fs/namei.c:4266 [inline]
 __x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4266
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8aa61bbad9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffaa082978 EFLAGS: 00000246 ORIG_RAX: 0000000000000103
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8aa61bbad9
RDX: 0000000000000000 RSI: 0000400000000100 RDI: 00000000ffffff9c
RBP: 00007f8aa622f5f0 R08: 000055557a79b4c0 R09: 000055557a79b4c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffaa0829a0
R13: 00007fffaa082bc8 R14: 431bde82d7b634db R15: 00007f8aa620403b
 </TASK>

Allocated by task 5824:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4294 [inline]
 __kmalloc_noprof+0x285/0x4c0 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 hfs_find_init+0x90/0x1f0 fs/hfs/bfind.c:21
 hfs_cat_create+0x17f/0x760 fs/hfs/catalog.c:96
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 vfs_create+0x23c/0x3d0 fs/namei.c:3350
 do_mknodat+0x447/0x5b0 fs/namei.c:4241
 __do_sys_mknodat fs/namei.c:4269 [inline]
 __se_sys_mknodat fs/namei.c:4266 [inline]
 __x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4266
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88814679d580
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 allocated 78-byte region [ffff88814679d580, ffff88814679d5ce)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14679d
flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000000 ffff88801b041280 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080200020 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 9249013162, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:2423 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2587
 new_slab mm/slub.c:2640 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
 __slab_alloc+0x58/0xa0 mm/slub.c:3916
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 __kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4320
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 usb_hub_create_port_device+0xc8/0xc10 drivers/usb/core/port.c:746
 hub_configure drivers/usb/core/hub.c:1711 [inline]
 hub_probe+0x262c/0x3780 drivers/usb/core/hub.c:1977
 usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396
 really_probe+0x2b9/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88814679d480: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
 ffff88814679d500: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
>ffff88814679d580: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff88814679d600: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff88814679d680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================

Crashes (616):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/08 15:34 upstream 2a520073e74f 7e3bd60d .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/02 05:23 upstream 03d38806a902 c3901742 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2024/11/23 12:59 upstream 06afb0f36106 68da6d95 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-badwrites-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2024/11/23 12:09 upstream 06afb0f36106 68da6d95 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-badwrites-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/12 17:54 upstream 0fed89a961ea ee70e6db .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/28 02:47 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/28 01:38 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/27 21:25 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/27 20:23 upstream 1a9239bb4253 6c09fb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/27 10:14 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/27 09:04 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/27 07:49 upstream 1e1ba8d23dae 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/27 00:38 upstream 2df0c02dab82 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 23:08 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 19:00 upstream 2df0c02dab82 20510e88 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 17:21 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 14:25 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 11:55 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 10:07 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 08:16 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/26 00:24 upstream 2df0c02dab82 89d30d73 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 22:03 upstream 2df0c02dab82 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 17:04 upstream 2f2d52945852 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 15:41 upstream 2f2d52945852 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 12:36 upstream 2f2d52945852 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 11:14 upstream 2f2d52945852 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 10:02 upstream 327ecdbc0fda 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 08:27 upstream 2f2d52945852 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 07:25 upstream 2f2d52945852 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 05:40 upstream 2f2d52945852 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 04:01 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 02:31 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 01:16 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 23:50 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 22:35 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 21:12 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 18:26 upstream 38fec10eb60d 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 12:55 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 11:17 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 08:35 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 05:53 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 01:57 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 00:46 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/23 22:14 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/23 19:59 upstream 586de92313fc 4e8d3850 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/03 04:27 upstream 7eb172143d55 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/28 17:48 upstream acb4f33713b9 9a1a9e31 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/28 10:50 upstream 4fa118e5b79f 6c09fb82 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/28 07:57 upstream 4fa118e5b79f 6c09fb82 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/27 11:16 upstream f6e0150b2003 20510e88 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/25 13:38 upstream 2f2d52945852 875573af .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/24 19:32 upstream 38fec10eb60d 875573af .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/23 19:38 upstream 586de92313fc 4e8d3850 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/02/26 17:00 linux-next e5d3fd687aac d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: slab-out-of-bounds Write in hfs_bnode_read
2025/03/20 08:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b5737d35364f 3b7445cf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-out-of-bounds Write in hfs_bnode_read
* Struck through repros no longer work on HEAD.