bisecting fixing commit since 7cc2a8ea104820dd9e702202621e8fd4d9f6c8cf
building syzkaller on 510951950dc0ee69cfdaf746061d3dbe31b49fd8
testing commit 7cc2a8ea104820dd9e702202621e8fd4d9f6c8cf with gcc (GCC) 8.1.0
kernel signature: dd5bcac7cc69ce310218a7047caa021b7c1d910e1bc1c63dcba8123abee9efe9
all runs: crashed: WARNING in generic_make_request_checks
testing current HEAD 71c061d2443814de15e177489d5cc00a4a253ef3
testing commit 71c061d2443814de15e177489d5cc00a4a253ef3 with gcc (GCC) 8.1.0
kernel signature: db915902fcf307b27440daf12751a8ccc12555ffe204e28c1ac9e30183e8ddd1
all runs: crashed: WARNING in submit_bio_checks
revisions tested: 2, total time: 15m57.752691748s (build: 10m2.515619843s, test: 5m17.639663966s)
the crash still happens on HEAD
commit msg: Merge tag 'for-5.11-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
crash: WARNING in submit_bio_checks
------------[ cut here ]------------
Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 7416 at block/blk-core.c:707 bio_check_ro block/blk-core.c:705 [inline]
WARNING: CPU: 1 PID: 7416 at block/blk-core.c:707 submit_bio_checks+0x236/0x800 block/blk-core.c:834
Modules linked in:
CPU: 1 PID: 7416 Comm: syz-executor.0 Not tainted 5.11.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bio_check_ro block/blk-core.c:705 [inline]
RIP: 0010:submit_bio_checks+0x236/0x800 block/blk-core.c:834
Code: a2 e0 05 00 00 48 8d 75 b0 48 89 df c6 05 34 ca c5 02 01 e8 6c 93 ff ff 48 c7 c7 e0 48 f7 83 48 89 c6 44 89 e2 e8 2c cf 39 01 <0f> 0b 48 8b 43 08 48 8b 50 38 8b 43 28 c1 e8 09 48 8b 52 28 48 8b
RSP: 0018:ffffc90002083828 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff888114e09800 RCX: 0000000000000001
RDX: 0000000080000001 RSI: ffffffff84080839 RDI: 00000000ffffffff
RBP: ffffc90002083880 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 7420676e69797254 R12: 0000000000000000
R13: ffffc90002083be0 R14: ffff8881051faea0 R15: ffff8881051faea0
FS:  0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39ca507000 CR3: 000000010984a003 CR4: 00000000001706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bio_noacct+0x37/0x640 block/blk-core.c:1046
 submit_bio+0x3e/0x180 block/blk-core.c:1131
 submit_bh_wbc+0x168/0x190 fs/buffer.c:3054
 __block_write_full_page+0x225/0x5b0 fs/buffer.c:1810
 __writepage+0xe/0x60 mm/page-writeback.c:2311
 write_cache_pages+0x221/0x540 mm/page-writeback.c:2246
 generic_writepages+0x54/0x90 mm/page-writeback.c:2337
 do_writepages+0x39/0xe0 mm/page-writeback.c:2352
 __filemap_fdatawrite_range+0xc2/0x100 mm/filemap.c:422
 filemap_write_and_wait_range+0x36/0x90 mm/filemap.c:655
 sync_blockdev fs/block_dev.c:514 [inline]
 __blkdev_put+0x193/0x1b0 fs/block_dev.c:1552
 blkdev_put+0x4b/0x130 fs/block_dev.c:1621
 blkdev_close+0x1f/0x30 fs/block_dev.c:1629
 __fput+0xa1/0x250 fs/file_table.c:280
 task_work_run+0x68/0xb0 kernel/task_work.c:140
 exit_task_work include/linux/task_work.h:30 [inline]
 do_exit+0x45c/0xd40 kernel/exit.c:825
 do_group_exit+0x42/0xb0 kernel/exit.c:922
 get_signal+0x151/0xc40 kernel/signal.c:2770
 arch_do_signal_or_restart+0xaa/0x8f0 arch/x86/kernel/signal.c:811
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x1b7/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x40/0x80 kernel/entry/common.c:302
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cba9
Code: Unable to access opcode bytes at RIP 0x45cb7f.
RSP: 002b:00007fa6998f5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 000000000078bfa8 RCX: 000000000045cba9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000078bfac
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac
R13: 00007ffc5a13cacf R14: 00007fa6998f69c0 R15: 000000000078bfac