Messages in this thread | | | Date | Thu, 24 Sep 2020 02:26:27 -0700 | Subject | general protection fault in strncasecmp | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 98477740 Merge branch 'rcu/urgent' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15b4d887900000 kernel config: https://syzkaller.appspot.com/x/.config?x=5f4c828c9e3cef97 dashboard link: https://syzkaller.appspot.com/bug?extid=459a5dce0b4cb70fd076 compiler: gcc (GCC) 10.1.0-syz 20200507 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=125d46c5900000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c58f8b900000
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+459a5dce0b4cb70fd076@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xf27d208691691fdb: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x93e924348b48fed8-0x93e924348b48fedf] CPU: 1 PID: 10071 Comm: syz-executor152 Not tainted 5.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:strncasecmp lib/string.c:52 [inline] RIP: 0010:strncasecmp+0x5f/0x240 lib/string.c:43 Code: 00 40 38 ce 0f 85 ec 01 00 00 4c 39 e2 0f 84 11 01 00 00 4c 89 fe 4c 89 e7 49 83 c4 01 48 89 f8 48 89 f9 48 c1 e8 03 83 e1 07 <42> 0f b6 04 28 38 c8 7f 08 84 c0 0f 85 0f 01 00 00 41 0f b6 6c 24 RSP: 0018:ffffc9000ba7f958 EFLAGS: 00010202 RAX: 127d248691691fdb RBX: dffffc0000000000 RCX: 0000000000000001 RDX: 93e924348b48fee3 RSI: ffff8880a1a65401 RDI: 93e924348b48fed9 RBP: 0000000000000009 R08: 000000000000002e R09: 0000000000000025 R10: 0000000000000000 R11: 0000000000000005 R12: 93e924348b48feda R13: dffffc0000000000 R14: 00000000000000e7 R15: ffffffff82ddbcd0 FS: 00007fd01e732700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004cdb30 CR3: 00000000929cd000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: afs_lookup_cell_rcu+0x313/0x720 fs/afs/cell.c:88 afs_lookup_cell+0x2ee/0x1440 fs/afs/cell.c:249 afs_parse_source fs/afs/super.c:290 [inline] afs_parse_param+0x404/0x8c0 fs/afs/super.c:326 vfs_parse_fs_param fs/fs_context.c:117 [inline] vfs_parse_fs_param+0x203/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 generic_parse_monolithic+0x16f/0x1f0 fs/fs_context.c:201 do_new_mount fs/namespace.c:2871 [inline] path_mount+0x133f/0x20a0 fs/namespace.c:3192 do_mount fs/namespace.c:3205 [inline] __do_sys_mount fs/namespace.c:3413 [inline] __se_sys_mount fs/namespace.c:3390 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3390 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x44d57a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd 9f 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 9a 9f fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fd01e731c48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd01e731c90 RCX: 000000000044d57a RDX: 0000000020000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 0000000000000000 R08: 00007fd01e731c90 R09: 00007fd01e732700 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd01e7326d0 R13: 00007ffd130bca8f R14: 00007fd01e7329c0 R15: 0000000000000000 Modules linked in: ---[ end trace d103c481405d6a99 ]--- RIP: 0010:strncasecmp lib/string.c:52 [inline] RIP: 0010:strncasecmp+0x5f/0x240 lib/string.c:43 Code: 00 40 38 ce 0f 85 ec 01 00 00 4c 39 e2 0f 84 11 01 00 00 4c 89 fe 4c 89 e7 49 83 c4 01 48 89 f8 48 89 f9 48 c1 e8 03 83 e1 07 <42> 0f b6 04 28 38 c8 7f 08 84 c0 0f 85 0f 01 00 00 41 0f b6 6c 24 RSP: 0018:ffffc9000ba7f958 EFLAGS: 00010202 RAX: 127d248691691fdb RBX: dffffc0000000000 RCX: 0000000000000001 RDX: 93e924348b48fee3 RSI: ffff8880a1a65401 RDI: 93e924348b48fed9 RBP: 0000000000000009 R08: 000000000000002e R09: 0000000000000025 R10: 0000000000000000 R11: 0000000000000005 R12: 93e924348b48feda R13: dffffc0000000000 R14: 00000000000000e7 R15: ffffffff82ddbcd0 FS: 00007fd01e732700(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb63ee2c000 CR3: 00000000929cd000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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