INFO: task syz-executor.3:4950 blocked for more than 143 seconds.
Not tainted 5.4.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D23624 4950 18463 0x00004004
Call Trace:
context_switch kernel/sched/core.c:3385 [inline]
__schedule+0x837/0xc50 kernel/sched/core.c:4081
schedule+0x181/0x210 kernel/sched/core.c:4155
io_schedule+0x8b/0x100 kernel/sched/core.c:5799
wait_on_page_bit_common+0x918/0xc90 mm/filemap.c:1175
wait_on_page_bit+0x46/0x50 mm/filemap.c:1224
wait_on_page_writeback+0x13e/0x180 mm/page-writeback.c:2822
__filemap_fdatawait_range+0x1b5/0x3b0 mm/filemap.c:526
file_write_and_wait_range+0x141/0x1a0 mm/filemap.c:786
__generic_file_fsync+0x76/0x1a0 fs/libfs.c:1000
fat_file_fsync+0x7c/0x190 fs/fat/file.c:199
vfs_fsync_range+0xfd/0x1a0 fs/sync.c:197
generic_write_sync include/linux/fs.h:2849 [inline]
generic_file_write_iter+0x575/0x630 mm/filemap.c:3470
do_iter_readv_writev+0x651/0x8e0 include/linux/fs.h:1889
do_iter_write+0x180/0x590 fs/read_write.c:970
vfs_iter_write+0x7c/0xa0 fs/read_write.c:983
iter_file_splice_write+0x6d8/0xe20 fs/splice.c:746
do_splice_from fs/splice.c:848 [inline]
direct_splice_actor+0xf7/0x130 fs/splice.c:1020
splice_direct_to_actor+0x463/0xac0 fs/splice.c:975
do_splice_direct+0x200/0x330 fs/splice.c:1063
do_sendfile+0x7e4/0xfd0 fs/read_write.c:1464
__do_sys_sendfile64 fs/read_write.c:1519 [inline]
__se_sys_sendfile64 fs/read_write.c:1511 [inline]
__x64_sys_sendfile64+0xfc/0x1b0 fs/read_write.c:1511
do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a679
Code: f3 a4 48 8b 94 24 18 10 00 00 ff 12 48 8b 94 24 10 10 00 00 48 8b bc 24 20 10 00 00 8b 8c 24 28 10 00 00 8b 9c 24 2c 10 00 00 <48> 89 e6 48 01 df 48 01 de 48 29 d9 e8 c6 fa ff ff 48 8b ac 24 00
RSP: 002b:00007f46497bec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a679
RDX: 0000000020000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 00008080fffffffe R11: 0000000000000246 R12: 00007f46497bf6d4
R13: 00000000004c8623 R14: 00000000004df300 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1080:
#0: ffffffff88ad42c0 (rcu_read_lock){....}, at: rcu_lock_acquire+0x4/0x30 include/linux/rcupdate.h:207
2 locks held by getty/7933:
#0: ffff8880a944b090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272
#1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156
2 locks held by getty/7934:
#0: ffff88809a5b9090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272
#1: ffffc90005f252e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156
2 locks held by getty/7935:
#0: ffff8880a74c5090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272
#1: ffffc90005f312e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156
2 locks held by getty/7936:
#0: ffff888095ccb090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272
#1: ffffc90005f292e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156
2 locks held by getty/7937:
#0: ffff888099faa090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272
#1: ffffc90005f192e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156
2 locks held by getty/7938:
#0: ffff88808efab090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272
#1: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156
2 locks held by getty/7939:
#0: ffff8880a1af7090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:272
#1: ffffc90005f012e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x221/0x1b00 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.3/4950:
#0: ffff8880a8964428 (sb_writers#14){.+.+}, at: file_start_write include/linux/fs.h:2878 [inline]
#0: ffff8880a8964428 (sb_writers#14){.+.+}, at: do_sendfile+0x7c2/0xfd0 fs/read_write.c:1463
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1080 Comm: khungtaskd Not tainted 5.4.0-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+0x1fb/0x318 lib/dump_stack.c:118
nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace+0x17/0x20 include/linux/nmi.h:146
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xd49/0xd60 kernel/hung_task.c:289
kthread+0x332/0x350 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 312 Comm: kworker/u4:4 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:check_memory_region+0x6/0x2e0 mm/kasan/generic.c:191
Code: 0c 31 db 48 c7 c7 c4 a0 5a 88 4c 89 fe 31 c0 e8 93 cd ae ff eb cf cc cc cc cc cc cc cc cc cc cc cc cc cc cc 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 fd 01 00 00 48 89 fb 48
RSP: 0018:ffff8880a8e0f948 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000029 RCX: ffffffff8159d3dc
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff897e8ca0
RBP: ffff8880a8e0f950 R08: dffffc0000000000 R09: fffffbfff12fd195
R10: fffffbfff12fd195 R11: 0000000000000000 R12: ffff8880a8e00df4
R13: ffff8880a8e00d50 R14: ffff8880a8e00dd0 R15: ffff8880a8e004c0
FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000a453e000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__kasan_check_read+0x11/0x20 mm/kasan/common.c:92
test_bit include/asm-generic/bitops-instrumented.h:237 [inline]
__lock_acquire+0x6fc/0x1be0 kernel/locking/lockdep.c:3925
lock_acquire+0x158/0x250 kernel/locking/lockdep.c:4485
rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:208
rcu_read_lock include/linux/rcupdate.h:617 [inline]
batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:754 [inline]
batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:821 [inline]
batadv_iv_ogm_schedule+0x396/0xf10 net/batman-adv/bat_iv_ogm.c:865
batadv_iv_send_outstanding_bat_ogm_packet+0x665/0x770 net/batman-adv/bat_iv_ogm.c:1718
process_one_work+0x7ef/0x10d0 kernel/workqueue.c:2264
worker_thread+0xc01/0x1630 kernel/workqueue.c:2410
kthread+0x332/0x350 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352