Re: [Cluster-devel] general protection fault in gfs2_rgrp_dump
On 06/10/2020 13:48, syzbot wrote: Hello, syzbot found the following issue on: HEAD commit:7575fdda Merge tag 'platform-drivers-x86-v5.9-2' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14abb7c790 kernel config: https://syzkaller.appspot.com/x/.config?x=de7f697da23057c7 dashboard link: https://syzkaller.appspot.com/bug?extid=43fa87986bdd31df9de6 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+43fa87986bdd31df9...@syzkaller.appspotmail.com gfs2: fsid=syz:syz.0: ri_addr = 20 ri_length = 1 ri_data0 = 21 ri_data = 2060 ri_bitbytes = 0 I could reproduce this by setting ri_bitbytes in the first rindex entry to 0. The bug is in the error path. Patch submitted: https://www.redhat.com/archives/cluster-devel/2020-October/msg8.html Andy start=0 len=0 offset=128 general protection fault, probably for non-canonical address 0xdc20: [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0100-0x0107] CPU: 1 PID: 19688 Comm: syz-executor.3 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:gfs2_rgrp_dump+0x3b/0x6c0 fs/gfs2/rgrp.c:2220 Code: 24 10 48 89 f3 48 89 7c 24 08 48 bd 00 00 00 00 00 fc ff df e8 06 7a 2b fe 48 89 ea 48 81 c3 00 01 00 00 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 12 48 89 df e8 97 60 6b fe 48 ba 00 00 00 00 00 fc RSP: 0018:c90009037758 EFLAGS: 00010202 RAX: 0020 RBX: 0100 RCX: 0004 RDX: dc00 RSI: 00016753 RDI: 00016754 RBP: dc00 R08: 83ddd758 R09: f52001206efa R10: f52001206efa R11: R12: 89364b22 R13: 888042e74000 R14: dc00 R15: 89364943 FS: 7fb8f261d700() GS:8880ae90() knlGS: CS: 0010 DS: ES: CR0: 80050033 CR2: 016a9e60 CR3: 959d9000 CR4: 001506e0 DR0: DR1: DR2: DR3: DR6: fffe0ff0 DR7: 0400 Call Trace: gfs2_consist_rgrpd_i+0xa1/0x110 fs/gfs2/util.c:422 compute_bitstructs fs/gfs2/rgrp.c:812 [inline] read_rindex_entry fs/gfs2/rgrp.c:909 [inline] gfs2_ri_update+0xb60/0x1860 fs/gfs2/rgrp.c:986 gfs2_rindex_update+0x283/0x320 fs/gfs2/rgrp.c:1032 init_inodes fs/gfs2/ops_fstype.c:792 [inline] gfs2_fill_super+0x28e7/0x3fe0 fs/gfs2/ops_fstype.c:1125 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1201 vfs_get_tree+0x88/0x270 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x179d/0x29e0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount+0x126/0x180 fs/namespace.c:3390 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x46087a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:7fb8f261ca88 EFLAGS: 0202 ORIG_RAX: 00a5 RAX: ffda RBX: 7fb8f261cb20 RCX: 0046087a RDX: 2000 RSI: 2100 RDI: 7fb8f261cae0 RBP: 7fb8f261cae0 R08: 7fb8f261cb20 R09: 2000 R10: R11: 0202 R12: 2000 R13: 2100 R14: 2200 R15: 20047a20 Modules linked in: ---[ end trace 8711b33583174bc7 ]--- RIP: 0010:gfs2_rgrp_dump+0x3b/0x6c0 fs/gfs2/rgrp.c:2220 Code: 24 10 48 89 f3 48 89 7c 24 08 48 bd 00 00 00 00 00 fc ff df e8 06 7a 2b fe 48 89 ea 48 81 c3 00 01 00 00 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 12 48 89 df e8 97 60 6b fe 48 ba 00 00 00 00 00 fc RSP: 0018:c90009037758 EFLAGS: 00010202 RAX: 0020 RBX: 0100 RCX: 0004 RDX: dc00 RSI: 00016753 RDI: 00016754 RBP: dc00 R08: 83ddd758 R09: f52001206efa R10: f52001206efa R11: R12: 89364b22 R13: 888042e74000 R14: dc00 R15: 89364943 FS: 7fb8f261d700() GS:8880ae90() knlGS: CS: 0010 DS: ES: CR0: 80050033 CR2: 016a9e60 CR3: 959d9000 CR4: 001506e0 DR0: DR1: DR2: DR3: DR6: fffe0ff0 DR7: 0400 --- 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
[Cluster-devel] general protection fault in gfs2_rgrp_dump
Hello, syzbot found the following issue on: HEAD commit:7575fdda Merge tag 'platform-drivers-x86-v5.9-2' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14abb7c790 kernel config: https://syzkaller.appspot.com/x/.config?x=de7f697da23057c7 dashboard link: https://syzkaller.appspot.com/bug?extid=43fa87986bdd31df9de6 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+43fa87986bdd31df9...@syzkaller.appspotmail.com gfs2: fsid=syz:syz.0: ri_addr = 20 ri_length = 1 ri_data0 = 21 ri_data = 2060 ri_bitbytes = 0 start=0 len=0 offset=128 general protection fault, probably for non-canonical address 0xdc20: [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0100-0x0107] CPU: 1 PID: 19688 Comm: syz-executor.3 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:gfs2_rgrp_dump+0x3b/0x6c0 fs/gfs2/rgrp.c:2220 Code: 24 10 48 89 f3 48 89 7c 24 08 48 bd 00 00 00 00 00 fc ff df e8 06 7a 2b fe 48 89 ea 48 81 c3 00 01 00 00 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 12 48 89 df e8 97 60 6b fe 48 ba 00 00 00 00 00 fc RSP: 0018:c90009037758 EFLAGS: 00010202 RAX: 0020 RBX: 0100 RCX: 0004 RDX: dc00 RSI: 00016753 RDI: 00016754 RBP: dc00 R08: 83ddd758 R09: f52001206efa R10: f52001206efa R11: R12: 89364b22 R13: 888042e74000 R14: dc00 R15: 89364943 FS: 7fb8f261d700() GS:8880ae90() knlGS: CS: 0010 DS: ES: CR0: 80050033 CR2: 016a9e60 CR3: 959d9000 CR4: 001506e0 DR0: DR1: DR2: DR3: DR6: fffe0ff0 DR7: 0400 Call Trace: gfs2_consist_rgrpd_i+0xa1/0x110 fs/gfs2/util.c:422 compute_bitstructs fs/gfs2/rgrp.c:812 [inline] read_rindex_entry fs/gfs2/rgrp.c:909 [inline] gfs2_ri_update+0xb60/0x1860 fs/gfs2/rgrp.c:986 gfs2_rindex_update+0x283/0x320 fs/gfs2/rgrp.c:1032 init_inodes fs/gfs2/ops_fstype.c:792 [inline] gfs2_fill_super+0x28e7/0x3fe0 fs/gfs2/ops_fstype.c:1125 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1342 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1201 vfs_get_tree+0x88/0x270 fs/super.c:1547 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x179d/0x29e0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount+0x126/0x180 fs/namespace.c:3390 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x46087a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:7fb8f261ca88 EFLAGS: 0202 ORIG_RAX: 00a5 RAX: ffda RBX: 7fb8f261cb20 RCX: 0046087a RDX: 2000 RSI: 2100 RDI: 7fb8f261cae0 RBP: 7fb8f261cae0 R08: 7fb8f261cb20 R09: 2000 R10: R11: 0202 R12: 2000 R13: 2100 R14: 2200 R15: 20047a20 Modules linked in: ---[ end trace 8711b33583174bc7 ]--- RIP: 0010:gfs2_rgrp_dump+0x3b/0x6c0 fs/gfs2/rgrp.c:2220 Code: 24 10 48 89 f3 48 89 7c 24 08 48 bd 00 00 00 00 00 fc ff df e8 06 7a 2b fe 48 89 ea 48 81 c3 00 01 00 00 48 89 d8 48 c1 e8 03 <80> 3c 28 00 74 12 48 89 df e8 97 60 6b fe 48 ba 00 00 00 00 00 fc RSP: 0018:c90009037758 EFLAGS: 00010202 RAX: 0020 RBX: 0100 RCX: 0004 RDX: dc00 RSI: 00016753 RDI: 00016754 RBP: dc00 R08: 83ddd758 R09: f52001206efa R10: f52001206efa R11: R12: 89364b22 R13: 888042e74000 R14: dc00 R15: 89364943 FS: 7fb8f261d700() GS:8880ae90() knlGS: CS: 0010 DS: ES: CR0: 80050033 CR2: 016a9e60 CR3: 959d9000 CR4: 001506e0 DR0: DR1: DR2: DR3: DR6: fffe0ff0 DR7: 0400 --- 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 syzkal...@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
