INFO: task syz.3.20:6614 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.20 state:D stack:25368 pid:6614 tgid:6613 ppid:6593 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5295 [inline] __schedule+0x1539/0x5080 kernel/sched/core.c:6907 __schedule_loop kernel/sched/core.c:6989 [inline] schedule+0x164/0x360 kernel/sched/core.c:7004 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7061 rwsem_down_read_slowpath+0x61e/0x920 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1261 [inline] __down_read kernel/locking/rwsem.c:1274 [inline] down_read_nested+0x9b/0x2e0 kernel/locking/rwsem.c:1663 dbAlloc+0x3aa/0xba0 fs/jfs/jfs_dmap.c:790 diNewExt+0x9b0/0x3150 fs/jfs/jfs_imap.c:2261 diAllocExt fs/jfs/jfs_imap.c:1952 [inline] diAllocAG+0xeb1/0x1db0 fs/jfs/jfs_imap.c:1669 diAlloc+0x1d5/0x1680 fs/jfs/jfs_imap.c:1590 ialloc+0x8c/0x8f0 fs/jfs/jfs_inode.c:56 jfs_mkdir+0x1e1/0xb00 fs/jfs/namei.c:226 vfs_mkdir+0x413/0x630 fs/namei.c:5233 filename_mkdirat+0x285/0x510 fs/namei.c:5266 __do_sys_mkdirat fs/namei.c:5287 [inline] __se_sys_mkdirat+0x35/0x150 fs/namei.c:5284 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f66cdb9a679 RSP: 002b:00007f66ce9f1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f66cde05fa0 RCX: 00007f66cdb9a679 RDX: 0000000000000408 RSI: 0000200000000300 RDI: 0000000000000004 RBP: 00007f66cdc2dee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f66cde06038 R14: 00007f66cde05fa0 R15: 00007fff526d2378 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8e7601a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #0: ffffffff8e7601a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #0: ffffffff8e7601a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 5 locks held by kworker/u8:3/49: 2 locks held by getty/5577: #0: ffff888036f680a0 ( &tty->ldisc_sem ){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0 drivers/tty/n_tty.c:2211 1 lock held by syz.0.17/6536: 1 lock held by syz.1.18/6561: 1 lock held by syz.2.19/6585: 5 locks held by syz.3.20/6614: #0: ffff888044c0a420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff888077f18578 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] ffff888077f18578 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2923 [inline] ffff888077f18578 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2934 [inline] ffff888077f18578 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4922 #2: ffff8880603e8920 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diAlloc+0x1b5/0x1680 fs/jfs/jfs_imap.c:-1 #3: ffff888077f18a60 ( &jfs_ip->rdwrlock /1 ){++++}-{4:4} , at: diNewIAG fs/jfs/jfs_imap.c:2617 [inline] , at: diAllocExt fs/jfs/jfs_imap.c:1905 [inline] , at: diAllocAG+0x7a8/0x1db0 fs/jfs/jfs_imap.c:1669 #4: ffff888077f19388 (&jfs_ip->rdwrlock#2/2){++++}-{4:4}, at: dbAlloc+0x3aa/0xba0 fs/jfs/jfs_dmap.c:790 2 locks held by syz.3.20/6615: 5 locks held by syz.4.21/6645: #0: ffff88805af02420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff88805b453340 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] #1: ffff88805b453340 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2923 [inline] #1: ffff88805b453340 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2934 [inline] #1: ffff88805b453340 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4922 #2: ffff88805a2d8920 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diAlloc+0x1b5/0x1680 fs/jfs/jfs_imap.c:-1 #3: ffff88805b453828 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diNewIAG fs/jfs/jfs_imap.c:2617 [inline] #3: ffff88805b453828 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diAllocExt fs/jfs/jfs_imap.c:1905 [inline] #3: ffff88805b453828 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diAllocAG+0x7a8/0x1db0 fs/jfs/jfs_imap.c:1669 #4: ffff88805b454150 (&jfs_ip->rdwrlock#2/2){++++}-{4:4}, at: dbAlloc+0x3aa/0xba0 fs/jfs/jfs_dmap.c:790 2 locks held by syz.4.21/6646: 5 locks held by syz.5.22/6682: #0: ffff888035148420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff888077f32a18 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1073 [inline] ffff888077f32a18 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2923 [inline] ffff888077f32a18 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2934 [inline] ffff888077f32a18 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: filename_create+0x200/0x370 fs/namei.c:4922 #2: ffff888044bf0920 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diAlloc+0x1b5/0x1680 fs/jfs/jfs_imap.c:-1 #3: ffff888077f32f00 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diNewIAG fs/jfs/jfs_imap.c:2617 [inline] #3: ffff888077f32f00 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diAllocExt fs/jfs/jfs_imap.c:1905 [inline] #3: ffff888077f32f00 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diAllocAG+0x7a8/0x1db0 fs/jfs/jfs_imap.c:1669 #4: ffff888077f33828 (&jfs_ip->rdwrlock#2/2){++++}-{4:4}, at: dbAlloc+0x3aa/0xba0 fs/jfs/jfs_dmap.c:790 2 locks held by syz.5.22/6684: 5 locks held by syz.6.23/6716: #0: ffff8880439c0420 ( sb_writers #12 ){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff88805b456a30 (&type->i_mutex_dir_key#8 /1 ){+.+.}-{4:4} , at: inode_lock_nested include/linux/fs.h:1073 [inline] , at: __start_dirop fs/namei.c:2923 [inline] , at: start_dirop fs/namei.c:2934 [inline] , at: filename_create+0x200/0x370 fs/namei.c:4922 #2: ffff888036ef0920 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diAlloc+0x1b5/0x1680 fs/jfs/jfs_imap.c:-1 #3: ffff88805b456f18 (&jfs_ip->rdwrlock/1){++++}-{4:4} , at: diNewIAG fs/jfs/jfs_imap.c:2617 [inline] , at: diAllocExt fs/jfs/jfs_imap.c:1905 [inline] , at: diAllocAG+0x7a8/0x1db0 fs/jfs/jfs_imap.c:1669 #4: ffff888077f30138 (&jfs_ip->rdwrlock#2/2){++++}-{4:4} , at: dbAlloc+0x3aa/0xba0 fs/jfs/jfs_dmap.c:790 2 locks held by syz.6.23/6717: 5 locks held by syz.7.24/6749: #0: ffff88802a0c2420 (sb_writers #12 ){.+.+}-{0:0} , at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff88805b7420f0 (&type->i_mutex_dir_key #8 /1 ){+.+.}-{4:4} , at: inode_lock_nested include/linux/fs.h:1073 [inline] , at: __start_dirop fs/namei.c:2923 [inline] , at: start_dirop fs/namei.c:2934 [inline] , at: filename_create+0x200/0x370 fs/namei.c:4922 #2: ffff88806db30920 ( &(imap->im_aglock[index]) ){+.+.}-{4:4} , at: diAlloc+0x1b5/0x1680 fs/jfs/jfs_imap.c:-1 #3: ffff88805b7425d8 ( &jfs_ip->rdwrlock /1 ){++++}-{4:4} , at: diNewIAG fs/jfs/jfs_imap.c:2617 [inline] , at: diAllocExt fs/jfs/jfs_imap.c:1905 [inline] , at: diAllocAG+0x7a8/0x1db0 fs/jfs/jfs_imap.c:1669 #4: ffff88805b742f00 ( &jfs_ip->rdwrlock #2/2){++++}-{4:4}, at: dbAlloc+0x3aa/0xba0 fs/jfs/jfs_dmap.c:790 2 locks held by syz.7.24/6750: 5 locks held by syz.8.25/6786: #0: ffff888059caa420 ( sb_writers #12 ){.+.+}-{0:0} , at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff888077f36108 ( &type->i_mutex_dir_key #8 /1 ){+.+.}-{4:4} , at: inode_lock_nested include/linux/fs.h:1073 [inline] , at: __start_dirop fs/namei.c:2923 [inline] , at: start_dirop fs/namei.c:2934 [inline] , at: filename_create+0x200/0x370 fs/namei.c:4922 #2: ffff888044328920 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diAlloc+0x1b5/0x1680 fs/jfs/jfs_imap.c:-1