INFO: task syz-executor.5:20137 blocked for more than 143 seconds.
Not tainted 6.5.0-syzkaller-12821-g6099776f9f26 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:23152 pid:20137 ppid:19950 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x370 fs/fs-writeback.c:2650
try_to_writeback_inodes_sb+0x98/0xc0 fs/fs-writeback.c:2698
ext4_nonda_switch fs/ext4/inode.c:2836 [inline]
ext4_da_write_begin+0x22b/0xa40 fs/ext4/inode.c:2863
generic_perform_write+0x31b/0x630 mm/filemap.c:3942
ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299
ext4_file_write_iter+0x1d3/0x1ad0 fs/ext4/file.c:717
__kernel_write_iter+0x32a/0x7c0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x46c/0x910 fs/coredump.c:915
elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142
do_coredump+0x1b73/0x2ab0 fs/coredump.c:764
get_signal+0x145e/0x1840 kernel/signal.c:2878
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309
exc_general_protection+0x3f4/0x5b0 arch/x86/kernel/traps.c:642
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f4c0f87caf1
RSP: 002b:00000000200000e0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f4c0f99bf80 RCX: 00007f4c0f87cae9
RDX: 0000000020000100 RSI: 00000000200000e0 RDI: 0000000010002000
RBP: 00007f4c0f8c847a R08: 0000000020000180 R09: 0000000020000180
R10: 0000000020000140 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4c0f99bf80 R15: 00007fff05258598
INFO: task syz-executor.1:20171 blocked for more than 144 seconds.
Not tainted 6.5.0-syzkaller-12821-g6099776f9f26 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:23696 pid:20171 ppid:3194 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x370 fs/fs-writeback.c:2650
try_to_writeback_inodes_sb+0x98/0xc0 fs/fs-writeback.c:2698
ext4_nonda_switch fs/ext4/inode.c:2836 [inline]
ext4_da_write_begin+0x22b/0xa40 fs/ext4/inode.c:2863
generic_perform_write+0x31b/0x630 mm/filemap.c:3942
ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299
ext4_file_write_iter+0x1d3/0x1ad0 fs/ext4/file.c:717
__kernel_write_iter+0x32a/0x7c0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x46c/0x910 fs/coredump.c:915
elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142
do_coredump+0x1b73/0x2ab0 fs/coredump.c:764
get_signal+0x145e/0x1840 kernel/signal.c:2878
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309
exc_page_fault+0x57c/0x860 arch/x86/mm/fault.c:1564
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x21
RSP: 002b:00000000200000f8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f9c81b9bf80 RCX: 00007f9c81a7cae9
RDX: 0000000020000100 RSI: 00000000200000f0 RDI: 0000000010002000
RBP: 00007f9c81ac847a R08: 0000000020000180 R09: 0000000020000180
R10: 0000000020000140 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9c81b9bf80 R15: 00007ffd8f3bfa28
INFO: task syz-executor.3:20181 blocked for more than 145 seconds.
Not tainted 6.5.0-syzkaller-12821-g6099776f9f26 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:23696 pid:20181 ppid:19948 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x370 fs/fs-writeback.c:2650
try_to_writeback_inodes_sb+0x98/0xc0 fs/fs-writeback.c:2698
ext4_nonda_switch fs/ext4/inode.c:2836 [inline]
ext4_da_write_begin+0x22b/0xa40 fs/ext4/inode.c:2863
generic_perform_write+0x31b/0x630 mm/filemap.c:3942
ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299
ext4_file_write_iter+0x1d3/0x1ad0 fs/ext4/file.c:717
__kernel_write_iter+0x32a/0x7c0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x46c/0x910 fs/coredump.c:915
elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142
do_coredump+0x1b73/0x2ab0 fs/coredump.c:764
get_signal+0x145e/0x1840 kernel/signal.c:2878
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309
exc_page_fault+0x57c/0x860 arch/x86/mm/fault.c:1564
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x3e
RSP: 002b:0000000020000348 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0c8319bf80 RCX: 00007f0c8307cae9
RDX: 0000000020000380 RSI: 0000000020000340 RDI: 0000000062080000
RBP: 00007f0c830c847a R08: 0000000020000400 R09: 0000000020000400
R10: 00000000200003c0 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0c8319bf80 R15: 00007ffc65555628
INFO: task syz-executor.0:20389 blocked for more than 145 seconds.
Not tainted 6.5.0-syzkaller-12821-g6099776f9f26 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23920 pid:20389 ppid:11982 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
wb_wait_for_completion+0x166/0x290 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x2d2/0x370 fs/fs-writeback.c:2650
try_to_writeback_inodes_sb+0x98/0xc0 fs/fs-writeback.c:2698
ext4_nonda_switch fs/ext4/inode.c:2836 [inline]
ext4_da_write_begin+0x22b/0xa40 fs/ext4/inode.c:2863
generic_perform_write+0x31b/0x630 mm/filemap.c:3942
ext4_buffered_write_iter+0xc6/0x350 fs/ext4/file.c:299
ext4_file_write_iter+0x1d3/0x1ad0 fs/ext4/file.c:717
__kernel_write_iter+0x32a/0x7c0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x46c/0x910 fs/coredump.c:915
elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142
do_coredump+0x1b73/0x2ab0 fs/coredump.c:764
get_signal+0x145e/0x1840 kernel/signal.c:2878
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309
exc_page_fault+0x57c/0x860 arch/x86/mm/fault.c:1564
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0xb7e342093d
RSP: 002b:00000000200000e8 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f82d259bf80 RCX: 00007f82d247cae9
RDX: 0000000020000100 RSI: 00000000200000e0 RDI: 0000000010002000
RBP: 00007f82d24c847a R08: 0000000020000180 R09: 0000000020000180
R10: 0000000020000140 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f82d259bf80 R15: 00007ffdf8750a48
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.5.0-syzkaller-12821-g6099776f9f26 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xdf5/0xe40 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 21951 Comm: kworker/u4:17 Not tainted 6.5.0-syzkaller-12821-g6099776f9f26 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 kernel/kcov.c:207
Code: 48 8b 3d 74 be 0c 0d 48 89 de 5b e9 03 15 59 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d c0 11 76 7e 65 8b 15 c1 11 76 7e c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 04 16 00 00
RSP: 0018:ffffc9000cf5ec48 EFLAGS: 00000202
RAX: ffffffff81c4a7a9 RBX: 1ffff920019ebdb4 RCX: ffff88807cabd940
RDX: 0000000080000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff81c4a7a0 R09: 1ffff11009469474
R10: dffffc0000000000 R11: ffffed1009469475 R12: ffffc9000cf5eda0
R13: 0000000000002741 R14: ffffc9000cf5eda1 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0020a1000 CR3: 000000005d139000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__folio_batch_release+0x49/0x100 mm/swap.c:1058
folio_batch_release include/linux/pagevec.h:83 [inline]
mpage_prepare_extent_to_map+0x1a97/0x1e40 fs/ext4/inode.c:2493
ext4_do_writepages+0x1232/0x3c90 fs/ext4/inode.c:2673
ext4_writepages+0x203/0x3e0 fs/ext4/inode.c:2764
do_writepages+0x3a6/0x670 mm/page-writeback.c:2553
__writeback_single_inode+0x155/0xfa0 fs/fs-writeback.c:1603
writeback_sb_inodes+0x8e3/0x11d0 fs/fs-writeback.c:1894
wb_writeback+0x44d/0xc60 fs/fs-writeback.c:2070
wb_do_writeback fs/fs-writeback.c:2217 [inline]
wb_workfn+0x400/0xff0 fs/fs-writeback.c:2257
process_one_work+0x781/0x1130 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0xabf/0x1060 kernel/workqueue.c:2784
kthread+0x2b8/0x350 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304