Hello, When using Healer to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: 7d2a07b76933 Linux 5.14 git tree: upstream console output: https://drive.google.com/file/d/1Z-djyuwIRtlIKNHdLxoUnr8NqDu9zd9S/view?usp=sharing kernel config: https://drive.google.com/file/d/1XD9WYDViQLSXN7RGwH8AGGDvP9JvOghx/view?usp=sharing Sorry, I don't have a reproducer for this crash, hope the symbolized report can help. If you fix this issue, please add the following tag to the commit: Reported-by: Hao Sun <sunhao.th@xxxxxxxxx> ------------[ cut here ]------------ kernel BUG at fs/buffer.c:1510! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8695 Comm: syz-executor Not tainted 5.14.0 #25 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:block_invalidatepage+0x54d/0x660 fs/buffer.c:1510 Code: ff ff e8 c6 aa 9d ff b9 02 00 00 00 be 02 00 00 00 48 89 ef 48 c7 c2 c0 5e 20 89 e8 7d 0e 49 07 e9 29 fe ff ff e8 a3 aa 9d ff <0f> 0b e8 9c aa 9d ff 0f 0b e8 95 aa 9d ff 48 83 eb 01 e9 83 fb ff RSP: 0018:ffffc90000a376f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88810dd8b980 RDX: 0000000000000000 RSI: ffff88810dd8b980 RDI: 0000000000000002 RBP: 0000000000000000 R08: ffffffff81d74ddd R09: 0000000000001000 R10: 0000000000000005 R11: fffff940000b0000 R12: ffffea0000580000 R13: 0000000000000000 R14: 0000000000200000 R15: 0000000000200000 FS: 0000000000000000(0000) GS:ffff888119f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcb1d285b7 CR3: 0000000104f5d005 CR4: 0000000000770ee0 PKRU: 55555554 Call Trace: do_invalidatepage mm/truncate.c:157 [inline] truncate_cleanup_page+0x3e4/0x620 mm/truncate.c:176 truncate_inode_pages_range+0x26c/0x1960 mm/truncate.c:325 kill_bdev.isra.0+0x5f/0x80 fs/block_dev.c:86 blkdev_flush_mapping+0xdf/0x2e0 fs/block_dev.c:1243 blkdev_put_whole+0xe8/0x110 fs/block_dev.c:1277 blkdev_put+0x268/0x720 fs/block_dev.c:1576 blkdev_close+0x8c/0xb0 fs/block_dev.c:1586 __fput+0x288/0x920 fs/file_table.c:280 task_work_run+0xe0/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xbe4/0x2e00 kernel/exit.c:825 do_group_exit+0x125/0x340 kernel/exit.c:922 get_signal+0x4d5/0x25a0 kernel/signal.c:2808 arch_do_signal_or_restart+0x2ed/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x192/0x2a0 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4739cd Code: Unable to access opcode bytes at RIP 0x4739a3. RSP: 002b:00007f6c0fac6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000059c0a0 RCX: 00000000004739cd RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000059c0a8 RBP: 000000000059c0a8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac R13: 00007ffcdd11bbff R14: 00007ffcdd11bda0 R15: 00007f6c0fac6300 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 4d1faf5c7a1da2c5 ]--- RIP: 0010:block_invalidatepage+0x54d/0x660 fs/buffer.c:1510 Code: ff ff e8 c6 aa 9d ff b9 02 00 00 00 be 02 00 00 00 48 89 ef 48 c7 c2 c0 5e 20 89 e8 7d 0e 49 07 e9 29 fe ff ff e8 a3 aa 9d ff <0f> 0b e8 9c aa 9d ff 0f 0b e8 95 aa 9d ff 48 83 eb 01 e9 83 fb ff RSP: 0018:ffffc90000a376f8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88810dd8b980 RDX: 0000000000000000 RSI: ffff88810dd8b980 RDI: 0000000000000002 RBP: 0000000000000000 R08: ffffffff81d74ddd R09: 0000000000001000 R10: 0000000000000005 R11: fffff940000b0000 R12: ffffea0000580000 R13: 0000000000000000 R14: 0000000000200000 R15: 0000000000200000 FS: 0000000000000000(0000) GS:ffff888119f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6945606000 CR3: 000000010abb2004 CR4: 0000000000770ee0 PKRU: 55555554
