INFO: task syz-executor147:6866 can't die for more than 143 seconds. task:syz-executor147 state:D stack:28224 pid: 6866 ppid: 6855 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 io_schedule+0xb5/0x120 kernel/sched/core.c:6295 wait_on_page_bit_common+0x52c/0xca0 mm/filemap.c:1191 wait_on_page_bit mm/filemap.c:1216 [inline] wait_on_page_locked include/linux/pagemap.h:611 [inline] do_read_cache_page+0x257/0x1390 mm/filemap.c:2915 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x5af block/partitions/core.c:780 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x445/0xe00 block/partitions/core.c:708 bdev_disk_changed+0x208/0x390 fs/block_dev.c:1417 __blkdev_get+0xee4/0x1870 fs/block_dev.c:1546 blkdev_get+0xd1/0x240 fs/block_dev.c:1634 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1752 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3251 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3368 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4057a1 Code: Bad RIP value. RSP: 002b:00007f8a98881980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004057a1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f8a98881990 RBP: 6666666666666667 R08: 000000000000000f R09: 00007f8a98882700 R10: 00007f8a988829d0 R11: 0000000000000293 R12: 00000000006dbc2c R13: 00007ffff1c59b8f R14: 00007f8a988829c0 R15: 20c49ba5e353f7cf INFO: task syz-executor147:6866 blocked for more than 143 seconds. Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor147 state:D stack:28224 pid: 6866 ppid: 6855 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 io_schedule+0xb5/0x120 kernel/sched/core.c:6295 wait_on_page_bit_common+0x52c/0xca0 mm/filemap.c:1191 wait_on_page_bit mm/filemap.c:1216 [inline] wait_on_page_locked include/linux/pagemap.h:611 [inline] do_read_cache_page+0x257/0x1390 mm/filemap.c:2915 read_mapping_page include/linux/pagemap.h:437 [inline] read_part_sector+0xf6/0x5af block/partitions/core.c:780 adfspart_check_ICS+0x9d/0xc90 block/partitions/acorn.c:360 check_partition block/partitions/core.c:140 [inline] blk_add_partitions+0x445/0xe00 block/partitions/core.c:708 bdev_disk_changed+0x208/0x390 fs/block_dev.c:1417 __blkdev_get+0xee4/0x1870 fs/block_dev.c:1546 blkdev_get+0xd1/0x240 fs/block_dev.c:1634 blkdev_open+0x21d/0x2b0 fs/block_dev.c:1752 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3251 [inline] path_openat+0x1b9a/0x2730 fs/namei.c:3368 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x4057a1 Code: Bad RIP value. RSP: 002b:00007f8a98881980 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004057a1 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f8a98881990 RBP: 6666666666666667 R08: 000000000000000f R09: 00007f8a98882700 R10: 00007f8a988829d0 R11: 0000000000000293 R12: 00000000006dbc2c R13: 00007ffff1c59b8f R14: 00007f8a988829c0 R15: 20c49ba5e353f7cf Showing all locks held in the system: 1 lock held by khungtaskd/1173: #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5829 2 locks held by in:imklog/6545: #0: ffff8880a12ce130 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 #1: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: is_bpf_text_address+0x0/0x160 kernel/bpf/core.c:691 1 lock held by syz-executor147/6866: #0: ffff88808a7cd280 (&bdev->bd_mutex){+.+.}-{3:3}, at: __blkdev_get+0x457/0x1870 fs/block_dev.c:1479 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3899 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:write_comp_data+0x2f/0x80 kernel/kcov.c:218 Code: 05 36 20 8d 7e 65 48 8b 34 25 c0 fe 01 00 a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 86 4c 14 00 00 85 c0 74 4f 8b 86 28 14 00 00 <83> f8 03 75 44 48 8b 86 30 14 00 00 8b b6 2c 14 00 00 4c 8b 00 48 RSP: 0018:ffffc90005317d90 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888096cd5000 RCX: ffffffff81755db3 RDX: 0000000080000000 RSI: ffff888093f50340 RDI: 0000000000000005 RBP: 0000000080000000 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: 000000007fff0000 R14: 000000007fff0000 R15: ffffc90005317e40 FS: 00007f202b1628c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f202850e000 CR3: 0000000093904000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: migrate_enable include/linux/preempt.h:352 [inline] bpf_prog_run_pin_on_cpu include/linux/filter.h:598 [inline] seccomp_run_filters kernel/seccomp.c:324 [inline] __seccomp_filter+0x173/0x1520 kernel/seccomp.c:937 __secure_computing+0xfc/0x360 kernel/seccomp.c:1070 syscall_trace_enter kernel/entry/common.c:58 [inline] syscall_enter_from_user_mode+0xb7/0x290 kernel/entry/common.c:82 do_syscall_64+0xf/0x70 arch/x86/entry/common.c:41 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f202a3fbf17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007ffcc4f1be38 EFLAGS: 00000206 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 000055570fd191e0 RCX: 00007f202a3fbf17 RDX: 00007ffcc4f1bef0 RSI: 0000000000000000 RDI: 000055570fd191e0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000206 R12: 00007ffcc4f1bef0 R13: 0000000000000f3b R14: 00007ffcc4f1ece0 R15: 00007ffcc4f1c2f0