INFO: task syz-executor.4:9373 blocked for more than 143 seconds.
Not tainted 6.6.0-rc1-syzkaller-00125-ge42bebf6db29 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:21736 pid:9373 ppid:5046 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_general_protection+0x3f4/0x5b0 arch/x86/kernel/traps.c:642
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f3d0827caf1
RSP: 002b:0000000020000200 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f3d0839bf80 RCX: 00007f3d0827cae9
RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000040000000
RBP: 00007f3d082c847a R08: 00000000200002c0 R09: 00000000200002c0
R10: 0000000020000280 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3d0839bf80 R15: 00007ffc87434d98
INFO: task syz-executor.4:9394 blocked for more than 143 seconds.
Not tainted 6.6.0-rc1-syzkaller-00125-ge42bebf6db29 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:21552 pid:9394 ppid:5046 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: 0033:0xf13a
RSP: 002b:0000000020000448 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f3d0839c050 RCX: 00007f3d0827cae9
RDX: 0000000020000480 RSI: 0000000020000440 RDI: 0000000000000000
RBP: 00007f3d082c847a R08: 0000000020000500 R09: 0000000020000500
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f3d0839c050 R15: 00007ffc87434d98
INFO: task syz-executor.1:9426 blocked for more than 144 seconds.
Not tainted 6.6.0-rc1-syzkaller-00125-ge42bebf6db29 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:20976 pid:9426 ppid:8345 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: 0033:0x7f701127caf1
RSP: 002b:0000000020000200 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f701139bf80 RCX: 00007f701127cae9
RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000040000000
RBP: 00007f70112c847a R08: 00000000200002c0 R09: 00000000200002c0
R10: 0000000020000280 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f701139bf80 R15: 00007ffccca4adf8
INFO: task syz-executor.0:9435 blocked for more than 145 seconds.
Not tainted 6.6.0-rc1-syzkaller-00125-ge42bebf6db29 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:21968 pid:9435 ppid:32330 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_general_protection+0x3f4/0x5b0 arch/x86/kernel/traps.c:642
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f0a9867caf1
RSP: 002b:0000000020000200 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f0a9879bf80 RCX: 00007f0a9867cae9
RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000040000000
RBP: 00007f0a986c847a R08: 00000000200002c0 R09: 00000000200002c0
R10: 0000000020000280 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f0a9879bf80 R15: 00007ffc6a5b77b8
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc1-syzkaller-00125-ge42bebf6db29 #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11659 Comm: syz-executor.3 Not tainted 6.6.0-rc1-syzkaller-00125-ge42bebf6db29 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
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 54 c5 0c 0d 48 89 de 5b e9 53 19 59 00 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 20 15 76 7e 65 8b 15 21 15 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:ffffc90004a85f60 EFLAGS: 00000202
RAX: ffffffff813d9654 RBX: 0000000000000002 RCX: ffff888061ac5940
RDX: 0000000080000001 RSI: ffffffff8d19cda0 RDI: 0000000000000002
RBP: ffffffff8f2903fe R08: 0000000000000003 R09: ffffffff813d9627
R10: 0000000000000002 R11: ffff888061ac5940 R12: ffffffff8eb565e4
R13: dffffc0000000000 R14: 1ffff92000950c08 R15: ffffffff8f2903fa
FS: 00007fc5d27eb6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5d280c990 CR3: 000000007d937000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x6f4/0x29e0 arch/x86/kernel/unwind_orc.c:505
arch_stack_walk+0x146/0x1a0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1023 [inline]
__kmalloc+0xb9/0x230 mm/slab_common.c:1036
kmalloc_array include/linux/slab.h:636 [inline]
kcalloc include/linux/slab.h:667 [inline]
ext4_find_extent+0x36c/0xde0 fs/ext4/extents.c:914
ext4_ext_map_blocks+0x2cb/0x7150 fs/ext4/extents.c:4101
ext4_map_blocks+0xa2f/0x1cb0 fs/ext4/inode.c:621
_ext4_get_block+0x238/0x6a0 fs/ext4/inode.c:763
ext4_block_write_begin+0x53d/0x1550 fs/ext4/inode.c:1043
ext4_write_begin+0x619/0x10b0
ext4_da_write_begin+0x300/0xa40 fs/ext4/inode.c:2865
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: 0033:0xf13a
Code: Unable to access opcode bytes at 0xf110.
RSP: 002b:0000000020000448 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fc5d1b9c120 RCX: 00007fc5d1a7cae9
RDX: 0000000020000480 RSI: 0000000020000440 RDI: 0000000000000000
RBP: 00007fc5d1ac847a R08: 0000000020000500 R09: 0000000020000500
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fc5d1b9c120 R15: 00007ffd171a4938