Messages in this thread | | | Date | Tue, 26 Nov 2019 21:25:08 -0800 | Subject | WARNING in exfat_bdev_read | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: b9d3d014 Add linux-next specific files for 20191122 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=12348dcee00000 kernel config: https://syzkaller.appspot.com/x/.config?x=6c24c45ce29b175c dashboard link: https://syzkaller.appspot.com/bug?extid=1930da7118e99b06e4ab compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1541a716e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=128ff38ce00000
The bug was bisected to:
commit c48c9f7ff32b8b3965a08e40eb6763682d905b5d Author: Valdis Klētnieks <valdis.kletnieks@vt.edu> Date: Wed Aug 28 16:08:17 2019 +0000
staging: exfat: add exfat filesystem code to staging
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=15476b5ae00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=17476b5ae00000 console output: https://syzkaller.appspot.com/x/log.txt?x=13476b5ae00000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+1930da7118e99b06e4ab@syzkaller.appspotmail.com Fixes: c48c9f7ff32b ("staging: exfat: add exfat filesystem code to staging")
[EXFAT] trying to mount... ------------[ cut here ]------------ [EXFAT] No bh, device seems wrong or to be ejected. WARNING: CPU: 1 PID: 8844 at drivers/staging/exfat/exfat_blkdev.c:62 exfat_bdev_read+0x24f/0x2b0 drivers/staging/exfat/exfat_blkdev.c:62 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8844 Comm: syz-executor735 Not tainted 5.4.0-rc8-next-20191122-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x35 kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:exfat_bdev_read+0x24f/0x2b0 drivers/staging/exfat/exfat_blkdev.c:62 Code: 00 00 31 ff 41 bc fb ff ff ff 89 de e8 aa 3e f7 fb 85 db 0f 85 5d ff ff ff e8 1d 3d f7 fb 48 c7 c7 a0 a6 3e 88 e8 89 31 c8 fb <0f> 0b e9 45 ff ff ff e8 25 c9 33 fc e9 ad fe ff ff e8 db c8 33 fc RSP: 0018:ffff8880a73dfaa0 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff815d88c6 RDI: ffffed1014e7bf46 RBP: ffff8880a73dfad8 R08: ffff8880951821c0 R09: ffffed1015d26621 R10: ffffed1015d26620 R11: ffff8880ae933107 R12: 00000000fffffffb R13: ffff88808aea0000 R14: 0000000000000001 R15: 0000000000000000 sector_read+0x140/0x1f0 drivers/staging/exfat/exfat_core.c:2537 ffsMountVol drivers/staging/exfat/exfat_super.c:376 [inline] exfat_fill_super.cold+0x2e4/0x895 drivers/staging/exfat/exfat_super.c:3716 mount_bdev+0x304/0x3c0 fs/super.c:1415 exfat_fs_mount+0x35/0x40 drivers/staging/exfat/exfat_super.c:3772 legacy_get_tree+0x108/0x220 fs/fs_context.c:647 vfs_get_tree+0x8e/0x300 fs/super.c:1545 do_new_mount fs/namespace.c:2822 [inline] do_mount+0x135a/0x1b50 fs/namespace.c:3142 ksys_mount+0xdb/0x150 fs/namespace.c:3351 __do_sys_mount fs/namespace.c:3365 [inline] __se_sys_mount fs/namespace.c:3362 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3362 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440179 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe8f77ffc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440179 RDX: 0000000020000080 RSI: 0000000020000180 RDI: 0000000020000000 RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000401a00 R13: 0000000000401a90 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..
--- This bug 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@googlegroups.com.
syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
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