INFO: task syz-executor.4:31522 blocked for more than 143 seconds.
Not tainted 6.5.0-rc7-syzkaller-00168-g7d2f353b2682 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:23680 pid:31522 ppid:30918 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
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:2838
ext4_da_write_begin+0x16e/0x8c0 fs/ext4/inode.c:2865
generic_perform_write+0x278/0x600 mm/filemap.c:3923
ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299
ext4_file_write_iter+0x7ee/0x1950 fs/ext4/file.c:722
__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+0x2464/0x2770 kernel/signal.c:2867
arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308
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:310
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f45daa7caf1
RSP: 002b:00000000200002d0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f45dab9bf80 RCX: 00007f45daa7cae9
RDX: 0000000020000380 RSI: 00000000200002d0 RDI: 0000000000002000
RBP: 00007f45daac847a R08: 0000000020000400 R09: 0000000020000400
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f45dab9bf80 R15: 00007fff7a0e60b8
INFO: task syz-executor.3:31650 blocked for more than 144 seconds.
Not tainted 6.5.0-rc7-syzkaller-00168-g7d2f353b2682 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:22864 pid:31650 ppid:24094 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0xee1/0x59f0 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
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:2838
ext4_da_write_begin+0x16e/0x8c0 fs/ext4/inode.c:2865
generic_perform_write+0x278/0x600 mm/filemap.c:3923
ext4_buffered_write_iter+0x11f/0x3c0 fs/ext4/file.c:299
ext4_file_write_iter+0x7ee/0x1950 fs/ext4/file.c:722
__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+0x2464/0x2770 kernel/signal.c:2867
arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308
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:310
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f963d87caf1
RSP: 002b:0000000020000360 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f963d99bf80 RCX: 00007f963d87cae9
RDX: 0000000020000380 RSI: 0000000020000360 RDI: 0000000000002000
RBP: 00007f963d8c847a R08: 0000000020000400 R09: 0000000020000400
R10: 00000000200003c0 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f963d99bf80 R15: 00007ffef5934228
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c9a67f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c9a64f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xe20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
#0: ffffffff8c9a7400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
2 locks held by getty/4777:
#0: ffff8880289e5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfcb/0x1480 drivers/tty/n_tty.c:2187
3 locks held by kworker/u4:7/8008:
#0: ffff8880136a1138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
#0: ffff8880136a1138 ((wq_completion)writeback){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
#0: ffff8880136a1138 ((wq_completion)writeback){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
#0: ffff8880136a1138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
#0: ffff8880136a1138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline]
#0: ffff8880136a1138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
#0: ffff8880136a1138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
#1: ffffc900035c7d80 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
#2: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
4 locks held by kworker/u4:6/15907:
#0: ffff88814bdb2138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
#0: ffff88814bdb2138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
#0: ffff88814bdb2138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
#0: ffff88814bdb2138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
#0: ffff88814bdb2138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline]
#0: ffff88814bdb2138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
#0: ffff88814bdb2138 ((wq_completion)ext4-rsv-conversion){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
#1: ffffc9000567fd80 ((work_completion)(&ei->i_rsv_conversion_work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
#2: ffff88814c478988 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10e7/0x1600 fs/jbd2/transaction.c:461
#3: ffff88803beaaa88 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x5a7/0x1770 fs/ext4/inode.c:614
3 locks held by syz-executor.4/31522:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff8880822ade00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff8880822ade00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
#2: ffff88814c4740e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2695
3 locks held by syz-executor.3/31650:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888089921800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888089921800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
#2: ffff88814c4740e0 (&type->s_umount_key#32){++++}-{3:3}, at: try_to_writeback_inodes_sb+0x21/0xc0 fs/fs-writeback.c:2695
1 lock held by syz-executor.3/31653:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.3/31927:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/32167:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.3/32197:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/32212:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/32233:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.3/32246:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.2/32400:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/32412:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.0/32556:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.0/32562:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.0/32565:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/32586:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/32591:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/32619:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.3/32624:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.2/32631:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.3/32633:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
2 locks held by kworker/1:2/32636:
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:678 [inline]
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:705 [inline]
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x96a/0x16f0 kernel/workqueue.c:2570
#1: ffffc90004d07d80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x99e/0x16f0 kernel/workqueue.c:2574
1 lock held by syz-executor.4/32723:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.5/508:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.2/517:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.3/521:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/523:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.1/540:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
2 locks held by syz-executor.3/545:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88804169c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88804169c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
1 lock held by syz-executor.2/547:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.4/549:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.2/569:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
1 lock held by syz-executor.5/571:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
2 locks held by syz-executor.3/577:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88803bded400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88803bded400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.5/601:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88808a2e4000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88808a2e4000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
1 lock held by syz-executor.0/606:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
2 locks held by syz-executor.5/615:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88802f900e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88802f900e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
1 lock held by syz-executor.4/628:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
2 locks held by syz-executor.3/629:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff8880898f2c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff8880898f2c00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
1 lock held by syz-executor.3/654:
#0: ffff88814c476bd8 (&sbi->s_writepages_rwsem){.+.+}-{0:0}, at: do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
2 locks held by syz-executor.5/1043:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888085b5f200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888085b5f200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.0/1054:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888082273600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888082273600 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.2/1058:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888082275400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888082275400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.5/1059:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888034778e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888034778e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.5/1064:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88803bfdca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88803bfdca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.2/1065:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88803bfdf200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88803bfdf200 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.5/1070:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888082304a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888082304a00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.2/1071:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88804159c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88804159c000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.2/1074:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888082306800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888082306800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.5/1079:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888088870e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888088870e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.2/1080:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88808a2e0400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88808a2e0400 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.2/1083:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88808a2e5e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88808a2e5e00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.0/1088:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff88808904e800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff88808904e800 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by syz-executor.3/1090:
#0: ffff88814c474410 (sb_writers#4){.+.+}-{0:0}, at: get_signal+0x2464/0x2770 kernel/signal.c:2867
#1: ffff888075c04000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#1: ffff888075c04000 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_buffered_write_iter+0xb0/0x3c0 fs/ext4/file.c:294
2 locks held by dhcpcd/1235:
#0: ffff888085b62010 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
#0: ffff888085b62010 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x290 net/socket.c:653
#1: ffffffff8c9b28b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#1: ffffffff8c9b28b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x69e/0x7e0 kernel/rcu/tree_exp.h:992
2 locks held by dhcpcd/1236:
#0: ffff888023b1e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1715 [inline]
#0: ffff888023b1e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf50 net/packet/af_packet.c:3206
#1: ffffffff8c9b28b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#1: ffffffff8c9b28b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x404/0x7e0 kernel/rcu/tree_exp.h:992
1 lock held by dhcpcd/1237:
#0: ffff88807c332130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1715 [inline]
#0: ffff88807c332130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf50 net/packet/af_packet.c:3206
1 lock held by dhcpcd/1238:
#0: ffff88807c330130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1715 [inline]
#0: ffff88807c330130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf50 net/packet/af_packet.c:3206
1 lock held by dhcpcd/1239:
#0: ffff888055368130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1715 [inline]
#0: ffff888055368130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2c/0xf50 net/packet/af_packet.c:3206
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc7-syzkaller-00168-g7d2f353b2682 #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+0x2ac/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+0xf29/0x11b0 kernel/hung_task.c:379
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
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: 32633 Comm: syz-executor.3 Not tainted 6.5.0-rc7-syzkaller-00168-g7d2f353b2682 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:kasan_mem_to_shadow include/linux/kasan.h:59 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline]
RIP: 0010:kasan_check_range+0x39/0x190 mm/kasan/generic.c:187
Code: f8 41 54 44 0f b6 c2 48 01 f0 55 53 0f 82 c6 00 00 00 48 b8 ff ff ff ff ff 7f ff ff 48 39 f8 0f 83 b3 00 00 00 4c 8d 54 37 ff <48> 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 d1 48 c1 ed 03 49 c1
RSP: 0018:ffffc9000389f268 EFLAGS: 00000287
RAX: ffff7fffffffffff RBX: ffffea0000c38e80 RCX: ffffffff81b2d188
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea0000c38eb4
RBP: ffffea0000c38eb4 R08: 0000000000000001 R09: 0000000000000000
R10: ffffea0000c38eb7 R11: 0000000000094011 R12: ffffc9000389f458
R13: ffffea0000ec3740 R14: dffffc0000000000 R15: ffff8880346663c0
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd0feebad8 CR3: 000000002b837000 CR4: 0000000000350ee0
Call Trace:
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_add_unless include/linux/atomic/atomic-instrumented.h:1507 [inline]
page_ref_add_unless include/linux/page_ref.h:238 [inline]
folio_ref_add_unless include/linux/page_ref.h:247 [inline]
folio_ref_try_add_rcu include/linux/page_ref.h:280 [inline]
folio_try_get_rcu include/linux/page_ref.h:313 [inline]
find_get_entry mm/filemap.c:1987 [inline]
filemap_get_folios_tag+0x1e8/0xb90 mm/filemap.c:2273
mpage_prepare_extent_to_map+0x3c5/0x14a0 fs/ext4/inode.c:2389
ext4_do_writepages+0x104f/0x34a0 fs/ext4/inode.c:2675
ext4_writepages+0x30b/0x780 fs/ext4/inode.c:2766
do_writepages+0x1b4/0x690 mm/page-writeback.c:2553
filemap_fdatawrite_wbc mm/filemap.c:393 [inline]
filemap_fdatawrite_wbc+0x144/0x1b0 mm/filemap.c:383
__filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:426
ext4_alloc_da_blocks+0x1e9/0x270 fs/ext4/inode.c:3033
ext4_release_file+0x178/0x360 fs/ext4/file.c:169
__fput+0x3f7/0xac0 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa99/0x2a20 kernel/exit.c:874
do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
get_signal+0x23ea/0x2770 kernel/signal.c:2881
arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308
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:310
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f963d87caf1
Code: Unable to access opcode bytes at 0x7f963d87cac7.
RSP: 002b:0000000020000360 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f963d99bf80 RCX: 00007f963d87cae9
RDX: 0000000020000380 RSI: 0000000020000360 RDI: 0000000000002000
RBP: 00007f963d8c847a R08: 0000000020000400 R09: 0000000020000400
R10: 00000000200003c0 R11: 0000000000000206 R12: 0000000000000000
R13: 000000000000000b R14: 00007f963d99bf80 R15: 00007ffef5934228