INFO: task syz-executor.1:16194 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:24120 pid:16194 ppid:5923 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
wb_wait_for_completion+0x1ae/0x270 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x1d8/0x270 fs/fs-writeback.c:2650
try_to_writeback_inodes_sb+0x97/0xc0 fs/fs-writeback.c:2698
ext4_nonda_switch+0x1a9/0x1f0 fs/ext4/inode.c:2836
ext4_da_write_begin+0x16e/0x8c0 fs/ext4/inode.c:2863
generic_perform_write+0x278/0x600 mm/filemap.c:3945
ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299
ext4_file_write_iter+0x7f7/0x1860 fs/ext4/file.c:717
__kernel_write_iter+0x261/0x7e0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x299/0x790 fs/coredump.c:915
elf_core_dump+0x2721/0x38e0 fs/binfmt_elf.c:2142
do_coredump+0x2c96/0x3fc0 fs/coredump.c:764
get_signal+0x244b/0x27b0 kernel/signal.c:2878
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x3b
RSP: 002b:0000000020000308 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f426279bf80 RCX: 00007f426267cae9
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000010042000
RBP: 00007f42626c847a R08: 00000000200003c0 R09: 00000000200003c0
R10: 0000000020000380 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f426279bf80 R15: 00007ffd93450dc8
INFO: task syz-executor.2:16199 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:23432 pid:16199 ppid:5931 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
wb_wait_for_completion+0x1ae/0x270 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x1d8/0x270 fs/fs-writeback.c:2650
try_to_writeback_inodes_sb+0x97/0xc0 fs/fs-writeback.c:2698
ext4_nonda_switch+0x1a9/0x1f0 fs/ext4/inode.c:2836
ext4_da_write_begin+0x16e/0x8c0 fs/ext4/inode.c:2863
generic_perform_write+0x278/0x600 mm/filemap.c:3945
ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299
ext4_file_write_iter+0x7f7/0x1860 fs/ext4/file.c:717
__kernel_write_iter+0x261/0x7e0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x299/0x790 fs/coredump.c:915
elf_core_dump+0x2721/0x38e0 fs/binfmt_elf.c:2142
do_coredump+0x2c96/0x3fc0 fs/coredump.c:764
get_signal+0x244b/0x27b0 kernel/signal.c:2878
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x3b
RSP: 002b:0000000020000308 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f9d4539bf80 RCX: 00007f9d4527cae9
RDX: 0000000020000340 RSI: 0000000020000300 RDI: 0000000010042000
RBP: 00007f9d452c847a R08: 00000000200003c0 R09: 00000000200003c0
R10: 0000000020000380 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9d4539bf80 R15: 00007ffe83d97778
INFO: task syz-executor.1:16433 blocked for more than 144 seconds.
Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:23816 pid:16433 ppid:5923 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
wb_wait_for_completion+0x1ae/0x270 fs/fs-writeback.c:192
__writeback_inodes_sb_nr+0x1d8/0x270 fs/fs-writeback.c:2650
try_to_writeback_inodes_sb+0x97/0xc0 fs/fs-writeback.c:2698
ext4_nonda_switch+0x1a9/0x1f0 fs/ext4/inode.c:2836
ext4_da_write_begin+0x16e/0x8c0 fs/ext4/inode.c:2863
generic_perform_write+0x278/0x600 mm/filemap.c:3945
ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299
ext4_file_write_iter+0x7f7/0x1860 fs/ext4/file.c:717
__kernel_write_iter+0x261/0x7e0 fs/read_write.c:517
dump_emit_page fs/coredump.c:888 [inline]
dump_user_range+0x299/0x790 fs/coredump.c:915
elf_core_dump+0x2721/0x38e0 fs/binfmt_elf.c:2142
do_coredump+0x2c96/0x3fc0 fs/coredump.c:764
get_signal+0x244b/0x27b0 kernel/signal.c:2878
arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
irqentry_exit_to_user_mode+0x9/0x40 kernel/entry/common.c:309
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f426267caf1
RSP: 002b:0000000020000310 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f426279bf80 RCX: 00007f426267cae9
RDX: 0000000020000340 RSI: 0000000020000310 RDI: 0000000010042000
RBP: 00007f42626c847a R08: 00000000200003c0 R09: 00000000200003c0
R10: 0000000020000380 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f426279bf80 R15: 00007ffd93450dc8
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xfac/0x1230 kernel/hung_task.c:379
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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: 48 Comm: kworker/u4:3 Not tainted 6.5.0-rc7-next-20230825-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x70 kernel/kcov.c:207
Code: 81 e1 00 01 00 00 65 48 8b 14 25 c0 bc 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 04 16 00 00 85 c0 74 2b 8b 82 e0 15 00 00 <83> f8 02 75 20 48 8b 8a e8 15 00 00 8b 92 e4 15 00 00 48 8b 01 48
RSP: 0018:ffffc90000b8f308 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88823ffafad0 RCX: 0000000000000000
RDX: ffff888014ad3b80 RSI: ffffffff81dddb1a RDI: 0000000000000005
RBP: 0000000085bb0409 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000002
R13: ffff88823bcd6000 R14: ffff88823ffafb38 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0009dbfc0 CR3: 000000000c976000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kfence_guarded_alloc mm/kfence/core.c:451 [inline]
__kfence_alloc+0xcda/0x15d0 mm/kfence/core.c:1116
kfence_alloc include/linux/kfence.h:129 [inline]
slab_alloc_node mm/slub.c:3464 [inline]
__kmem_cache_alloc_node+0x254/0x350 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1022 [inline]
__kmalloc+0x4f/0x100 mm/slab_common.c:1036
kmalloc_array include/linux/slab.h:636 [inline]
kcalloc include/linux/slab.h:667 [inline]
ext4_find_extent+0x958/0xce0 fs/ext4/extents.c:914
ext4_ext_map_blocks+0x26b/0x5b10 fs/ext4/extents.c:4101
ext4_map_blocks+0x619/0x1770 fs/ext4/inode.c:621
ext4_convert_unwritten_extents+0x2b7/0x4c0 fs/ext4/extents.c:4810
ext4_convert_unwritten_io_end_vec+0x127/0x280 fs/ext4/extents.c:4849
ext4_end_io_end fs/ext4/page-io.c:186 [inline]
ext4_do_flush_completed_IO fs/ext4/page-io.c:259 [inline]
ext4_end_io_rsv_work+0x2ca/0x690 fs/ext4/page-io.c:273
process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304