Messages in this thread | | | Date | Tue, 03 Apr 2018 10:01:01 -0700 | Subject | KASAN: global-out-of-bounds Write in string | From | syzbot <> |
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Hello,
syzbot hit the following crash on upstream commit 642e7fd23353e22290e3d51719fcb658dc252342 (Tue Apr 3 04:22:12 2018 +0000) Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=b890b3335a4d8c608963
syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=4698588919627776 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=5456053378482176 Kernel config: https://syzkaller.appspot.com/x/.config?id=-6874493495260513980 compiler: gcc (GCC) 7.1.1 20170620
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b890b3335a4d8c608963@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer.
IPVS: ftp: loaded support on port[0] = 21 REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 syz-executor0 (4503) used greatest stack depth: 15560 bytes left REISERFS warning (device loop0): sh-2021 reiserfs_fill_super: can not find reiserfs on loop0 ================================================================== BUG: KASAN: global-out-of-bounds in string+0x1cb/0x200 lib/vsprintf.c:598 Write of size 1 at addr ffffffff89e166a0 by task syz-executor0/4522
CPU: 1 PID: 4522 Comm: syz-executor0 Not tainted 4.16.0+ #12 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1a7/0x27d lib/dump_stack.c:53 print_address_description+0x178/0x250 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x23c/0x360 mm/kasan/report.c:412 __asan_report_store1_noabort+0x17/0x20 mm/kasan/report.c:435 string+0x1cb/0x200 lib/vsprintf.c:598 vsnprintf+0x863/0x1900 lib/vsprintf.c:2282 vsprintf+0x2a/0x40 lib/vsprintf.c:2462 prepare_error_buf+0x1d2/0x1820 fs/reiserfs/prints.c:240 __reiserfs_warning+0xc8/0x1a0 fs/reiserfs/prints.c:267 reiserfs_getopt fs/reiserfs/super.c:1044 [inline] reiserfs_parse_options+0x11e5/0x24e0 fs/reiserfs/super.c:1194 reiserfs_fill_super+0x520/0x33a0 fs/reiserfs/super.c:1946 mount_bdev+0x2b7/0x370 fs/super.c:1119 get_super_block+0x34/0x40 fs/reiserfs/super.c:2605 mount_fs+0x66/0x2d0 fs/super.c:1222 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:2514 [inline] do_new_mount fs/namespace.c:2517 [inline] do_mount+0xea4/0x2b90 fs/namespace.c:2847 ksys_mount+0xab/0x120 fs/namespace.c:3063 SYSC_mount fs/namespace.c:3077 [inline] SyS_mount+0x39/0x50 fs/namespace.c:3074 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457d0a RSP: 002b:00007f0655cddbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457d0a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0655cddc00 RBP: 0000000000000004 R08: 0000000020013f00 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 000000000000066d R14: 00000000006fcad8 R15: 0000000000000001
The buggy address belongs to the variable: error_buf+0x400/0x420
Memory state around the buggy address: ffffffff89e16580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff89e16600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > ffffffff89e16680: 00 00 00 00 fa fa fa fa 04 fa fa fa fa fa fa fa ^ ffffffff89e16700: 00 fa fa fa fa fa fa fa 00 fa fa fa fa fa fa fa ffffffff89e16780: 00 fa fa fa fa fa fa fa 00 fa fa fa fa fa fa fa ==================================================================
--- This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@googlegroups.com.
syzbot will keep track of this bug report. If you forgot to add the Reported-by tag, once the fix for this bug is merged into any tree, please reply to this email with: #syz fix: exact-commit-title If you want to test a patch for this bug, please reply with: #syz test: git://repo/address.git branch and provide the patch inline or as an attachment. To mark this as a duplicate of another syzbot report, please reply with: #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, please reply with: #syz invalid Note: if the crash happens again, it will cause creation of a new bug report. Note: all commands must start from beginning of the line in the email body.
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