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Date: Sat, 01 Oct 2022 06:49:43 -0700
From: syzbot <syzbot+172bdd582e5d63486948@...kaller.appspotmail.com>
To: jfs-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
shaggy@...nel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] general protection fault in dtSplitUp
Hello,
syzbot found the following issue on:
HEAD commit: 5a77386984b5 Merge tag 'drm-fixes-2022-09-30-1' of git://a..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=15c1e370880000
kernel config: https://syzkaller.appspot.com/x/.config?x=755695d26ad09807
dashboard link: https://syzkaller.appspot.com/bug?extid=172bdd582e5d63486948
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13f2dc48880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1027d814880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/87931d29c9af/disk-5a773869.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/afb91893f060/vmlinux-5a773869.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+172bdd582e5d63486948@...kaller.appspotmail.com
loop0: detected capacity change from 0 to 32768
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 3612 Comm: syz-executor263 Not tainted 6.0.0-rc7-syzkaller-00162-g5a77386984b5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline]
RIP: 0010:dtSplitUp+0x1528/0x5120 fs/jfs/jfs_dtree.c:1034
Code: c6 74 11 e8 3a 46 a1 fe 48 8b 44 24 20 49 8d 5e e8 48 89 18 e8 29 46 a1 fe 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 90 35 00 00 4c 8b 33 31 ff 4c 89 f6 e8 e1 42 a1
RSP: 0018:ffffc9000395f2c8 EFLAGS: 00010256
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff82dac1f7 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888073ee333a R14: ffffc9000395f7f0 R15: ffff888073ee3270
FS: 00005555556d7300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005599fad45028 CR3: 000000001d4a7000 CR4: 0000000000350ee0
Call Trace:
<TASK>
dtInsert+0x82b/0xa10 fs/jfs/jfs_dtree.c:863
jfs_create+0x5b7/0xac0 fs/jfs/namei.c:137
lookup_open.isra.0+0xf05/0x12a0 fs/namei.c:3413
open_last_lookups fs/namei.c:3481 [inline]
path_openat+0x996/0x28f0 fs/namei.c:3688
do_filp_open+0x1b6/0x400 fs/namei.c:3718
do_sys_openat2+0x16d/0x4c0 fs/open.c:1313
do_sys_open fs/open.c:1329 [inline]
__do_sys_openat fs/open.c:1345 [inline]
__se_sys_openat fs/open.c:1340 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1340
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: 0033:0x7f1da668d019
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:00007fff79c19d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f1da668d019
RDX: 0000000000161842 RSI: 000000002000c380 RDI: 00000000ffffff9c
RBP: 00007f1da664c7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000f8008000
R13: 0000000000000000 R14: 0000000a00030083 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline]
RIP: 0010:dtSplitUp+0x1528/0x5120 fs/jfs/jfs_dtree.c:1034
Code: c6 74 11 e8 3a 46 a1 fe 48 8b 44 24 20 49 8d 5e e8 48 89 18 e8 29 46 a1 fe 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 90 35 00 00 4c 8b 33 31 ff 4c 89 f6 e8 e1 42 a1
RSP: 0018:ffffc9000395f2c8 EFLAGS: 00010256
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff82dac1f7 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888073ee333a R14: ffffc9000395f7f0 R15: ffff888073ee3270
FS: 00005555556d7300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005584d071b470 CR3: 000000001d4a7000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 74 11 je 0x13
2: e8 3a 46 a1 fe callq 0xfea14641
7: 48 8b 44 24 20 mov 0x20(%rsp),%rax
c: 49 8d 5e e8 lea -0x18(%r14),%rbx
10: 48 89 18 mov %rbx,(%rax)
13: e8 29 46 a1 fe callq 0xfea14641
18: 48 89 da mov %rbx,%rdx
1b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
22: fc ff df
25: 48 c1 ea 03 shr $0x3,%rdx
* 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2d: 0f 85 90 35 00 00 jne 0x35c3
33: 4c 8b 33 mov (%rbx),%r14
36: 31 ff xor %edi,%edi
38: 4c 89 f6 mov %r14,%rsi
3b: e8 .byte 0xe8
3c: e1 42 loope 0x80
3e: a1 .byte 0xa1
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
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