Hello, syzbot found the following issue on: HEAD commit: 764a5bc89b12 Merge tag 'drm-fixes-2021-07-30' of git://ano.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=169e4966300000 kernel config: https://syzkaller.appspot.com/x/.config?x=40eef000d7648480 dashboard link: https://syzkaller.appspot.com/bug?extid=dda2ebbaa98b7ee29c87 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+dda2ebbaa98b7ee29c87@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xfbd59c0000000040: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0xdead000000000200-0xdead000000000207] CPU: 0 PID: 14330 Comm: syz-executor.0 Not tainted 5.14.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__block_write_begin_int+0xdf/0x1810 fs/buffer.c:1973 Code: c1 e8 03 42 80 3c 28 00 41 89 ec 0f 85 4e 16 00 00 48 8b 04 24 48 8b 58 18 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 1e 16 00 00 48 8b 03 48 89 44 24 48 48 8b 04 24 RSP: 0018:ffffc900028df408 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: dead000000000200 RCX: ffffc9000a883000 RDX: 1bd5a00000000040 RSI: ffffffff81d82909 RDI: ffffea00020b8058 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff819c2dde R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000001000 R15: 0000000000001000 FS: 00007fdaaa33b700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055640707d930 CR3: 0000000030e6f000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __block_write_begin fs/buffer.c:2056 [inline] block_write_begin+0x58/0x2e0 fs/buffer.c:2116 generic_perform_write+0x202/0x500 mm/filemap.c:3656 __generic_file_write_iter+0x24e/0x610 mm/filemap.c:3783 blkdev_write_iter+0x298/0x550 fs/block_dev.c:1643 call_write_iter include/linux/fs.h:2114 [inline] do_iter_readv_writev+0x46f/0x740 fs/read_write.c:740 do_iter_write+0x188/0x670 fs/read_write.c:866 vfs_iter_write+0x70/0xa0 fs/read_write.c:907 iter_file_splice_write+0x723/0xc70 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x110/0x180 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0x9f0/0x1120 fs/read_write.c:1260 __do_sys_sendfile64 fs/read_write.c:1325 [inline] __se_sys_sendfile64 fs/read_write.c:1311 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1311 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdaaa33b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000080006 R11: 0000000000000246 R12: 000000000056bf80 R13: 0000000000a9fb1f R14: 00007fdaaa33b300 R15: 0000000000022000 Modules linked in: ---[ end trace 525ffcbbca5b966c ]--- RIP: 0010:__block_write_begin_int+0xdf/0x1810 fs/buffer.c:1973 Code: c1 e8 03 42 80 3c 28 00 41 89 ec 0f 85 4e 16 00 00 48 8b 04 24 48 8b 58 18 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 1e 16 00 00 48 8b 03 48 89 44 24 48 48 8b 04 24 RSP: 0018:ffffc900028df408 EFLAGS: 00010a02 RAX: dffffc0000000000 RBX: dead000000000200 RCX: ffffc9000a883000 RDX: 1bd5a00000000040 RSI: ffffffff81d82909 RDI: ffffea00020b8058 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff819c2dde R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000001000 R15: 0000000000001000 FS: 00007fdaaa33b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000030e6f000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
