Christoph Hellwig <hch@xxxxxxxxxxxxx> 于2021年9月14日周二 下午6:46写道： > > On Mon, Sep 13, 2021 at 10:00:27AM +0800, Hao Sun wrote: > > Hello, > > > > When using Healer to fuzz the latest Linux kernel, the following crash > > was triggered. > > > > HEAD commit: 4b93c544e90e-thunderbolt: test: split up test cases > > git tree: upstream > > console output: > > https://drive.google.com/file/d/1naN-5p-rFgKpHrshO_kQr5f_KlhvFGGU/view?usp=sharing > > kernel config: https://drive.google.com/file/d/1c0u2EeRDhRO-ZCxr9MP2VvAtJd6kfg-p/view?usp=sharing > > C reproducer: https://drive.google.com/file/d/19EDhssGw_V1oO2vWOPrgQqve0TdFSgvh/view?usp=sharing > > Syzlang reproducer: > > https://drive.google.com/file/d/13EGCCoaMe9oitrQCfy44BkGVLbKKFP6X/view?usp=sharing > > All these google drive links just lead me to badly localized error > messages. Can you upload these to a less broken hosting platform? console output: https://paste.ubuntu.com/p/5qHqPXWmCQ/ kernel config: https://paste.ubuntu.com/p/VsVbFh9ZpQ/ C reproducer: https://paste.ubuntu.com/p/yrYsn4zpcn/ Syzlang reproducer: https://paste.ubuntu.com/p/bCWyNyHncJ/ Just tried the C reproducer on the latest Linux kernel (6880fa6c5660 Linux 5.15-rc1). The reproducer still crashed the kernel but with a different backtrace. IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready Bluetooth: hci0: command 0x0409 tx timeout ------------[ cut here ]------------ kernel BUG at fs/buffer.c:1510! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.14.0+ #15 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Workqueue: events delayed_fput RIP: 0010:block_invalidatepage+0x27f/0x2a0 -origin/fs/buffer.c:1510 Code: ff ff e8 b4 07 d7 ff b9 02 00 00 00 be 02 00 00 00 4c 89 ff 48 c7 c2 40 4e 25 84 e8 2b c2 c4 02 e9 c9 fe ff ff e8 91 07 d7 ff <0f> 0b e8 8a 07 d7 ff 0f 0b e8 83 07 d7 ff 48 8d 5d ff e9 57 ff ff RSP: 0018:ffffc9000065bb60 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea0000670000 RCX: 0000000000000000 RDX: ffff8880097fa240 RSI: ffffffff81608a9f RDI: ffffea0000670000 RBP: ffffea0000670000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffc9000065b9f8 R11: 0000000000000003 R12: ffffffff81608820 R13: ffffc9000065bc68 R14: 0000000000000000 R15: ffffc9000065bbf0 FS: 0000000000000000(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4aef93fb08 CR3: 0000000108cf2000 CR4: 0000000000750ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: do_invalidatepage -origin/mm/truncate.c:157 [inline] truncate_cleanup_page+0x15c/0x280 -origin/mm/truncate.c:176 truncate_inode_pages_range+0x169/0xc30 -origin/mm/truncate.c:325 kill_bdev.isra.29+0x28/0x30 blkdev_flush_mapping+0x4c/0x130 -origin/block/bdev.c:658 blkdev_put_whole+0x54/0x60 -origin/block/bdev.c:689 blkdev_put+0x6f/0x210 -origin/block/bdev.c:953 blkdev_close+0x25/0x30 -origin/block/fops.c:459 __fput+0xdf/0x380 -origin/fs/file_table.c:280 delayed_fput+0x25/0x40 -origin/fs/file_table.c:308 process_one_work+0x359/0x850 -origin/kernel/workqueue.c:2297 worker_thread+0x41/0x4d0 -origin/kernel/workqueue.c:2444 kthread+0x178/0x1b0 -origin/kernel/kthread.c:319 ret_from_fork+0x1f/0x30 -origin/arch/x86/entry/entry_64.S:295 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 9dbb8f58f2109f10 ]--- RIP: 0010:block_invalidatepage+0x27f/0x2a0 -origin/fs/buffer.c:1510 Code: ff ff e8 b4 07 d7 ff b9 02 00 00 00 be 02 00 00 00 4c 89 ff 48 c7 c2 40 4e 25 84 e8 2b c2 c4 02 e9 c9 fe ff ff e8 91 07 d7 ff <0f> 0b e8 8a 07 d7 ff 0f 0b e8 83 07 d7 ff 48 8d 5d ff e9 57 ff ff RSP: 0018:ffffc9000065bb60 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffea0000670000 RCX: 0000000000000000 RDX: ffff8880097fa240 RSI: ffffffff81608a9f RDI: ffffea0000670000 RBP: ffffea0000670000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffc9000065b9f8 R11: 0000000000000003 R12: ffffffff81608820 R13: ffffc9000065bc68 R14: 0000000000000000 R15: ffffc9000065bbf0 FS: 0000000000000000(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff98674f000 CR3: 0000000106b2e000 CR4: 0000000000750ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554
