------------[ cut here ]------------ Trying to write to read-only block-device loop3 (partno 0) WARNING: CPU: 1 PID: 59 at block/blk-core.c:705 bio_check_ro block/blk-core.c:705 [inline] WARNING: CPU: 1 PID: 59 at block/blk-core.c:705 submit_bio_checks+0x1577/0x18d0 block/blk-core.c:833 Modules linked in: CPU: 1 PID: 59 Comm: kworker/u4:1 Not tainted 5.10.56 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 Workqueue: writeback wb_workfn (flush-7:3) RIP: 0010:bio_check_ro block/blk-core.c:705 [inline] RIP: 0010:submit_bio_checks+0x1577/0x18d0 block/blk-core.c:833 Code: 03 00 00 45 8b a4 24 64 05 00 00 48 89 ef 48 8d 74 24 50 e8 6b 36 fe ff 48 c7 c7 a0 51 3a 84 48 89 c6 44 89 e2 e8 18 ca d3 01 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 RSP: 0018:ffff88800c39f118 EFLAGS: 00010282 RAX: 0000000000000000 RBX: 1ffff11001873e29 RCX: 0000000000000000 RDX: ffff88800c390000 RSI: ffffffff812930d3 RDI: ffffed1001873e15 RBP: ffff8880523caf00 R08: 0000000000000001 R09: ffff88806cf2facf R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88800da32430 R14: ffff8880523caf10 R15: ffff8880523caf08 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004c97df CR3: 000000004db66000 CR4: 0000000000350ee0 Call Trace: submit_bio_noacct+0x7a/0xce0 block/blk-core.c:1045 submit_bio+0xf3/0x4e0 block/blk-core.c:1130 submit_bh_wbc.constprop.0+0x580/0x770 fs/buffer.c:3054 __block_write_full_page+0x7d3/0x1050 fs/buffer.c:1810 block_write_full_page+0x21c/0x290 fs/buffer.c:2980 __writepage+0x67/0x180 mm/page-writeback.c:2311 write_cache_pages+0x57f/0xef0 mm/page-writeback.c:2246 generic_writepages mm/page-writeback.c:2337 [inline] generic_writepages+0xe2/0x150 mm/page-writeback.c:2326 do_writepages+0xee/0x290 mm/page-writeback.c:2352 __writeback_single_inode+0x10a/0xd90 fs/fs-writeback.c:1467 writeback_sb_inodes+0x56e/0xfc0 fs/fs-writeback.c:1729 __writeback_inodes_wb+0xbe/0x270 fs/fs-writeback.c:1798 wb_writeback+0x710/0xab0 fs/fs-writeback.c:1904 wb_check_start_all fs/fs-writeback.c:2028 [inline] wb_do_writeback fs/fs-writeback.c:2054 [inline] wb_workfn+0x9b6/0x1010 fs/fs-writeback.c:2088 process_one_work+0x9a9/0x1590 kernel/workqueue.c:2270 worker_thread+0x61d/0x1310 kernel/workqueue.c:2416 kthread+0x38f/0x470 kernel/kthread.c:292 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:296 irq event stamp: 202485 hardirqs last enabled at (202495): [] console_unlock+0x929/0xb30 kernel/printk/printk.c:2552 hardirqs last disabled at (202504): [] console_unlock+0x835/0xb30 kernel/printk/printk.c:2467 softirqs last enabled at (201848): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (201839): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace 49ec810220837507 ]--- kauditd_printk_skb: 37 callbacks suppressed audit: type=1400 audit(1629253377.809:115): avc: denied { block_suspend } for pid=10940 comm="syz-executor.0" capability=36 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 syz-executor.4 (11092) used greatest stack depth: 23056 bytes left TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters. TCP: request_sock_TCPv6: Possible SYN flooding on port 20000. Sending cookies. Check SNMP counters.