syzbot


UBSAN: shift-out-of-bounds in dbAllocCtl

Status: upstream: reported C repro on 2022/10/02 11:18
Reported-by: syzbot+f0e5eba3996857670c88@syzkaller.appspotmail.com
First crash: 55d, last: 11d

Cause bisection: failed (bisect log)

Sample crash report:
loop0: detected capacity change from 0 to 32768
================================================================================
UBSAN: shift-out-of-bounds in fs/jfs/jfs_dmap.c:1785:12
shift exponent 1635280253 is too large for 64-bit type 'long long int'
CPU: 1 PID: 3611 Comm: syz-executor185 Not tainted 6.0.0-syzkaller-09413-g4899a36f91a9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 ubsan_epilogue+0xb/0x50 lib/ubsan.c:151
 __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x187 lib/ubsan.c:322
 dbAllocCtl.cold+0x75/0x7a fs/jfs/jfs_dmap.c:1785
 dbAllocAG+0x8da/0xd20 fs/jfs/jfs_dmap.c:1334
 dbAlloc+0x40d/0xa70 fs/jfs/jfs_dmap.c:858
 diNewIAG fs/jfs/jfs_imap.c:2500 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1898 [inline]
 diAllocAG+0xb93/0x2200 fs/jfs/jfs_imap.c:1662
 diAlloc+0x82d/0x1730 fs/jfs/jfs_imap.c:1583
 ialloc+0x89/0xaa0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1f0/0xab0 fs/jfs/namei.c:225
 vfs_mkdir+0x489/0x740 fs/namei.c:4013
 do_mkdirat+0x28c/0x310 fs/namei.c:4038
 __do_sys_mkdirat fs/namei.c:4053 [inline]
 __se_sys_mkdirat fs/namei.c:4051 [inline]
 __x64_sys_mkdirat+0x115/0x170 fs/namei.c:4051
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f48cb54add9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcc3e17d28 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f48cb54add9
RDX: 0000000000000000 RSI: 0000000020000540 RDI: 0000000000000003
RBP: 00007f48cb50a5a0 R08: 0000000000000000 R09: 00007f48cb50a5a0
R10: 0000555555ae02c0 R11: 0000000000000246 R12: 0000000200000004
R13: 0000000000000000 R14: 00080000000000f4 R15: 0000000000000000
 </TASK>
================================================================================

Crashes (21):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2022/10/10 19:24 upstream 4899a36f91a9 aea5da89 .config log report syz C UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/05 04:11 upstream 0326074ff465 267e3bb1 .config log report syz C UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-linux-next-kasan-gce-root 2022/10/03 21:48 linux-next aaa11ce2ffc8 feb56351 .config log report syz C UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/11/15 08:06 upstream e01d50cbd6ee 97de9cfc .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-kasan-gce-root 2022/11/12 10:37 upstream f9bbe0c99e5b 3ead01ad .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/11/03 16:26 upstream b229b6ca5abb 7a2ebf95 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/31 07:18 upstream b229b6ca5abb 2a71366b .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-kasan-gce-smack-root 2022/10/31 04:50 upstream b229b6ca5abb 2a71366b .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/25 19:26 upstream 337a0a0b63f1 45645420 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/21 01:32 upstream 493ffd6605b2 a0fd4dab .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/18 12:32 upstream 493ffd6605b2 b31320fc .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/14 19:51 upstream 493ffd6605b2 4954e4b2 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-kasan-gce-smack-root 2022/10/14 19:49 upstream 55be6084c8e0 4954e4b2 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-kasan-gce-root 2022/10/14 19:47 upstream 55be6084c8e0 4954e4b2 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-kasan-gce-selinux-root 2022/10/14 19:45 upstream 55be6084c8e0 4954e4b2 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-kasan-gce-smack-root 2022/10/14 18:44 upstream 55be6084c8e0 4954e4b2 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/11 15:04 upstream 493ffd6605b2 5bcf0c31 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/06 21:17 upstream 833477fce7a1 80b58a42 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci2-upstream-fs 2022/10/02 02:31 upstream ffb4d94b4314 feb56351 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-linux-next-kasan-gce-root 2022/10/14 19:49 linux-next aaa11ce2ffc8 4954e4b2 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
ci-upstream-linux-next-kasan-gce-root 2022/10/03 21:16 linux-next aaa11ce2ffc8 feb56351 .config log report info UBSAN: shift-out-of-bounds in dbAllocCtl
* Struck through repros no longer work on HEAD.