| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <671e6416.050a0220.2b8c0f.01de.GAE@google.com> Date: Sun, 27 Oct 2024 09:02:30 -0700 From: syzbot <syzbot+69c3bc471900052ecff5@...kaller.appspotmail.com> To: jlbec@...lplan.org, joseph.qi@...ux.alibaba.com, linux-kernel@...r.kernel.org, mark@...heh.com, ocfs2-devel@...ts.linux.dev, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_clear_cow_buffer syzbot has found a reproducer for the following issue on: HEAD commit: 850925a8133c Merge tag '9p-for-6.12-rc5' of https://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1553ea87980000 kernel config: https://syzkaller.appspot.com/x/.config?x=309bb816d40abc28 dashboard link: https://syzkaller.appspot.com/bug?extid=69c3bc471900052ecff5 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11f3cca7980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15f3cca7980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-850925a8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c831c931f29c/vmlinux-850925a8.xz kernel image: https://storage.googleapis.com/syzbot-assets/85f584e52a7f/bzImage-850925a8.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/219674756913/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+69c3bc471900052ecff5@...kaller.appspotmail.com ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ------------[ cut here ]------------ kernel BUG at fs/ocfs2/refcounttree.c:2890! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5326 Comm: syz-executor223 Not tainted 6.12.0-rc4-syzkaller-00261-g850925a8133c #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ocfs2_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2890 Code: 02 75 21 e8 c9 ac 02 fe 4c 89 f7 be 08 00 00 00 e8 2c 6d 6c fe 3e 41 80 26 ef 31 c0 5b 41 5e c3 cc cc cc cc e8 a8 ac 02 fe 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000d10ef60 EFLAGS: 00010293 RAX: ffffffff83923dc8 RBX: 0000000000000002 RCX: ffff8880009ac880 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000001000 R08: ffffffff83923d9c R09: 1ffff11008a63722 R10: dffffc0000000000 R11: ffffed1008a63723 R12: ffff88804531b910 R13: ffff88804531b828 R14: ffff88804531b910 R15: 0000000000000000 FS: 00007fa36d8496c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa36d8e700a CR3: 000000004306e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> walk_page_buffers+0x104/0x1d0 fs/ocfs2/aops.c:434 ocfs2_duplicate_clusters_by_page+0xb0a/0x1450 fs/ocfs2/refcounttree.c:2970 ocfs2_replace_clusters fs/ocfs2/refcounttree.c:3123 [inline] ocfs2_make_clusters_writable fs/ocfs2/refcounttree.c:3255 [inline] ocfs2_replace_cow+0xd82/0x25d0 fs/ocfs2/refcounttree.c:3349 ocfs2_refcount_cow_hunk fs/ocfs2/refcounttree.c:3427 [inline] ocfs2_refcount_cow+0x9c9/0x11c0 fs/ocfs2/refcounttree.c:3470 ocfs2_prepare_inode_for_write fs/ocfs2/file.c:2332 [inline] ocfs2_file_write_iter+0xf34/0x1f50 fs/ocfs2/file.c:2441 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215 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: 0033:0x7fa36d892ec9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa36d849208 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 0000000000000040 RCX: 00007fa36d892ec9 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000005 RBP: 00007fa36d91e708 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007800 R11: 0000000000000246 R12: 00007fa36d91e700 R13: 00007fa36d8eb4ec R14: 0031656c69662f2e R15: 6165627472616568 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_clear_cow_buffer+0x79/0x80 fs/ocfs2/refcounttree.c:2890 Code: 02 75 21 e8 c9 ac 02 fe 4c 89 f7 be 08 00 00 00 e8 2c 6d 6c fe 3e 41 80 26 ef 31 c0 5b 41 5e c3 cc cc cc cc e8 a8 ac 02 fe 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000d10ef60 EFLAGS: 00010293 RAX: ffffffff83923dc8 RBX: 0000000000000002 RCX: ffff8880009ac880 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: 0000000000001000 R08: ffffffff83923d9c R09: 1ffff11008a63722 R10: dffffc0000000000 R11: ffffed1008a63723 R12: ffff88804531b910 R13: ffff88804531b828 R14: ffff88804531b910 R15: 0000000000000000 FS: 00007fa36d8496c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa36586a000 CR3: 000000004306e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
Powered by blists - more mailing lists