syzbot


KASAN: slab-out-of-bounds Write in hfs_asc2mac

Status: upstream: reported C repro on 2022/11/26 02:11
Reported-by: syzbot+12da27c54cbd3890072d@syzkaller.appspotmail.com
First crash: 65d, last: 5h46m
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 KASAN: slab-out-of-bounds Write in hfs_asc2mac hfs C 9 32d 59d 0/1 upstream: reported C repro on 2022/12/02 20:22
upstream KASAN: slab-out-of-bounds Write in hfs_asc2mac C error 161 48d 66d 23/24 upstream: reported C repro on 2022/11/25 09:45

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
==================================================================
BUG: KASAN: slab-out-of-bounds in hfs_asc2mac+0x68f/0x710 fs/hfs/trans.c:133
Write of size 1 at addr ffff8880ab2a00ce by task syz-executor300/8391

CPU: 0 PID: 8391 Comm: syz-executor300 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_store1_noabort+0x88/0x90 mm/kasan/report.c:435
 hfs_asc2mac+0x68f/0x710 fs/hfs/trans.c:133
 hfs_cat_build_key+0xbe/0x1a0 fs/hfs/catalog.c:28
 hfs_lookup+0x1c2/0x300 fs/hfs/dir.c:31
 __lookup_slow+0x246/0x4a0 fs/namei.c:1672
 lookup_slow fs/namei.c:1689 [inline]
 walk_component+0x7ac/0xda0 fs/namei.c:1811
 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142
 link_path_walk fs/namei.c:2073 [inline]
 path_openat+0x1db/0x2df0 fs/namei.c:3536
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f5dc88f1409
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 15 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:00007f5dc88992f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f5dc8976780 RCX: 00007f5dc88f1409
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 00000000ffffff9c
RBP: 00007f5dc8942768 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0030656c69662f2e
R13: 616d755f656c6966 R14: 97c8398a0ee00f2b R15: 00007f5dc8976788

Allocated by task 8391:
 __do_kmalloc mm/slab.c:3727 [inline]
 __kmalloc+0x15a/0x3c0 mm/slab.c:3736
 kmalloc include/linux/slab.h:520 [inline]
 hfs_find_init+0x91/0x230 fs/hfs/bfind.c:21
 hfs_lookup+0xfe/0x300 fs/hfs/dir.c:28
 __lookup_slow+0x246/0x4a0 fs/namei.c:1672
 lookup_slow fs/namei.c:1689 [inline]
 walk_component+0x7ac/0xda0 fs/namei.c:1811
 link_path_walk.part.0+0x901/0x1230 fs/namei.c:2142
 link_path_walk fs/namei.c:2073 [inline]
 path_openat+0x1db/0x2df0 fs/namei.c:3536
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_sys_open+0x3b3/0x520 fs/open.c:1085
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 6334:
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcc/0x210 mm/slab.c:3822
 aa_free_file_ctx security/apparmor/include/file.h:76 [inline]
 apparmor_file_free_security+0x9a/0xd0 security/apparmor/lsm.c:448
 security_file_free+0x3e/0x70 security/security.c:885
 file_free fs/file_table.c:54 [inline]
 __fput+0x42a/0x890 fs/file_table.c:294
 task_work_run+0x148/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:193 [inline]
 exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8880ab2a0080
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 78 bytes inside of
 96-byte region [ffff8880ab2a0080, ffff8880ab2a00e0)
The buggy address belongs to the page:
page:ffffea0002aca800 count:1 mapcount:0 mapping:ffff88813bff04c0 index:0x0
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002ab1d88 ffffea0002aba9c8 ffff88813bff04c0
raw: 0000000000000000 ffff8880ab2a0000 0000000100000020 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880ab29ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880ab2a0000: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8880ab2a0080: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff8880ab2a0100: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff8880ab2a0180: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
==================================================================

Crashes (51):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci2-linux-4-19 2023/01/19 16:34 linux-4.19.y 3f8a27f9e27b 66fca3ae .config console log report syz C [disk image] [vmlinux] [mounted in repro] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/31 21:50 linux-4.19.y 3f8a27f9e27b ab32d508 .config console log report syz C [disk image] [vmlinux] [mounted in repro] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/14 21:00 linux-4.19.y 3f8a27f9e27b b18f0a64 .config console log report syz C [disk image] [vmlinux] [mounted in repro] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/11/27 09:00 linux-4.19.y 3f8a27f9e27b f4470a7b .config console log report syz C [disk image] [vmlinux] [mounted in repro] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/11/27 03:00 linux-4.19.y 3f8a27f9e27b f4470a7b .config console log report syz C [disk image] [vmlinux] [mounted in repro] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/11/26 17:16 linux-4.19.y 3f8a27f9e27b f4470a7b .config console log report syz C [disk image] [vmlinux] [mounted in repro] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/11/26 02:10 linux-4.19.y 3f8a27f9e27b f4470a7b .config console log report syz C [disk image] [vmlinux] [mounted in repro] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/30 19:01 linux-4.19.y 3f8a27f9e27b b68fb8d6 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/29 19:33 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/27 18:49 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/25 14:43 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/23 16:19 linux-4.19.y 3f8a27f9e27b 9dfcf09c .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/22 17:27 linux-4.19.y 3f8a27f9e27b cc0f9968 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/22 08:51 linux-4.19.y 3f8a27f9e27b cc0f9968 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/21 13:59 linux-4.19.y 3f8a27f9e27b cc0f9968 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/20 19:15 linux-4.19.y 3f8a27f9e27b dd15ff29 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/18 00:37 linux-4.19.y 3f8a27f9e27b 42660d9e .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/17 22:30 linux-4.19.y 3f8a27f9e27b 42660d9e .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/17 07:41 linux-4.19.y 3f8a27f9e27b a63719e7 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/13 08:52 linux-4.19.y 3f8a27f9e27b 96166539 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/10 20:49 linux-4.19.y 3f8a27f9e27b 48bc529a .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/06 08:04 linux-4.19.y 3f8a27f9e27b 1dac8c7a .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/06 06:37 linux-4.19.y 3f8a27f9e27b 1dac8c7a .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/06 01:16 linux-4.19.y 3f8a27f9e27b 1dac8c7a .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/03 17:08 linux-4.19.y 3f8a27f9e27b f0036e18 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2023/01/03 04:00 linux-4.19.y 3f8a27f9e27b ab32d508 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/28 02:40 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/27 21:11 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/27 20:45 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/27 20:36 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/27 20:28 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/27 18:19 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/27 17:02 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/25 14:50 linux-4.19.y 3f8a27f9e27b 9da18ae8 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/18 21:47 linux-4.19.y 3f8a27f9e27b 05494336 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/18 21:26 linux-4.19.y 3f8a27f9e27b 05494336 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/18 18:44 linux-4.19.y 3f8a27f9e27b 05494336 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/18 10:12 linux-4.19.y 3f8a27f9e27b 05494336 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/17 18:16 linux-4.19.y 3f8a27f9e27b 05494336 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/17 15:43 linux-4.19.y 3f8a27f9e27b 05494336 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/17 09:07 linux-4.19.y 3f8a27f9e27b 05494336 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/15 08:33 linux-4.19.y 3f8a27f9e27b b18f0a64 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/08 22:22 linux-4.19.y 3f8a27f9e27b 1034e5fa .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/08 07:37 linux-4.19.y 3f8a27f9e27b d88f3abb .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/07 21:42 linux-4.19.y 3f8a27f9e27b d88f3abb .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/07 02:55 linux-4.19.y 3f8a27f9e27b d88f3abb .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/06 15:18 linux-4.19.y 3f8a27f9e27b 045cbb84 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/04 23:14 linux-4.19.y 3f8a27f9e27b e080de16 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
ci2-linux-4-19 2022/12/03 04:53 linux-4.19.y 3f8a27f9e27b e080de16 .config console log report info [disk image] [vmlinux] KASAN: slab-out-of-bounds Write in hfs_asc2mac
* Struck through repros no longer work on HEAD.