Hello, syzbot found the following issue on: HEAD commit: 7c2878be5732 Add linux-next specific files for 20230714 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=13820f32a80000 kernel config: https://syzkaller.appspot.com/x/.config?x=3baff2936ac3cefa dashboard link: https://syzkaller.appspot.com/bug?extid=9877b6999a2554291c7d compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=119010f4a80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=170ad732a80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/bfdfa043f096/disk-7c2878be.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cf7a97f69e2a/vmlinux-7c2878be.xz kernel image: https://storage.googleapis.com/syzbot-assets/8366b63af2c6/bzImage-7c2878be.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/d3f8a02941e7/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9877b6999a2554291c7d@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task syz-executor122:5344 blocked for more than 143 seconds. Not tainted 6.5.0-rc1-next-20230714-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor122 state:D stack:26032 pid:5344 ppid:5028 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5380 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6709 schedule+0xe7/0x1b0 kernel/sched/core.c:6785 io_schedule+0xbe/0x130 kernel/sched/core.c:9027 folio_wait_bit_common+0x3d0/0x9a0 mm/filemap.c:1304 __folio_lock mm/filemap.c:1632 [inline] folio_lock include/linux/pagemap.h:974 [inline] folio_lock include/linux/pagemap.h:970 [inline] __filemap_get_folio+0x788/0x990 mm/filemap.c:1900 pagecache_get_page+0x2c/0x270 mm/folio-compat.c:99 find_or_create_page include/linux/pagemap.h:655 [inline] ni_readpage_cmpr+0x24e/0xc80 fs/ntfs3/frecord.c:2135 ntfs_read_folio+0x107/0x1e0 fs/ntfs3/inode.c:718 filemap_read_folio+0xe5/0x2b0 mm/filemap.c:2390 filemap_create_folio mm/filemap.c:2518 [inline] filemap_get_pages+0xdd7/0x1820 mm/filemap.c:2571 filemap_splice_read+0x3d0/0x9f0 mm/filemap.c:2927 ntfs_file_splice_read+0x10d/0x190 fs/ntfs3/file.c:773 vfs_splice_read fs/splice.c:993 [inline] vfs_splice_read+0x2c8/0x3b0 fs/splice.c:962 splice_direct_to_actor+0x2a5/0xa30 fs/splice.c:1069 do_splice_direct+0x1af/0x280 fs/splice.c:1194 do_sendfile+0xb88/0x1390 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd9aca10e09 RSP: 002b:00007fd9ac9c5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fd9acab1708 RCX: 00007fd9aca10e09 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007fd9acab1700 R08: 00007fd9ac9c56c0 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 00007fd9acab170c R13: 0000000000000006 R14: 00007ffdd97961a0 R15: 00007ffdd9796288 </TASK> INFO: task syz-executor122:5345 blocked for more than 143 seconds. Not tainted 6.5.0-rc1-next-20230714-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor122 state:D stack:26448 pid:5345 ppid:5028 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5380 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6709 schedule+0xe7/0x1b0 kernel/sched/core.c:6785 io_schedule+0xbe/0x130 kernel/sched/core.c:9027 folio_wait_bit_common+0x3d0/0x9a0 mm/filemap.c:1304 __folio_lock mm/filemap.c:1632 [inline] folio_lock include/linux/pagemap.h:974 [inline] folio_lock include/linux/pagemap.h:970 [inline] __filemap_get_folio+0x788/0x990 mm/filemap.c:1900 pagecache_get_page+0x2c/0x270 mm/folio-compat.c:99 find_or_create_page include/linux/pagemap.h:655 [inline] ntfs_get_frame_pages+0x132/0x640 fs/ntfs3/file.c:793 ntfs_compress_write fs/ntfs3/file.c:943 [inline] ntfs_file_write_iter+0xfdc/0x1c10 fs/ntfs3/file.c:1080 call_write_iter include/linux/fs.h:1916 [inline] do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735 do_iter_write+0x17f/0x830 fs/read_write.c:860 vfs_iter_write+0x7a/0xb0 fs/read_write.c:901 iter_file_splice_write+0x698/0xbf0 fs/splice.c:738 do_splice_from fs/splice.c:933 [inline] direct_splice_actor+0x118/0x180 fs/splice.c:1142 splice_direct_to_actor+0x347/0xa30 fs/splice.c:1088 do_splice_direct+0x1af/0x280 fs/splice.c:1194 do_sendfile+0xb88/0x1390 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd9aca10e09 RSP: 002b:00007fd9a47a4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fd9acab1718 RCX: 00007fd9aca10e09 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007fd9acab1710 R08: 00007fd9a47a46c0 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 00007fd9acab171c R13: 000000000000006e R14: 00007ffdd97961a0 R15: 00007ffdd9796288 </TASK> Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8c9a5cb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xef0 kernel/rcu/tasks.h:571 1 lock held by rcu_tasks_trace/14: #0: ffffffff8c9a5970 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x2c/0xef0 kernel/rcu/tasks.h:571 1 lock held by khungtaskd/28: #0: ffffffff8c9a68c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615 5 locks held by kworker/u4:4/57: 2 locks held by getty/4784: #0: ffff88814ac0c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015b72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfcb/0x1480 drivers/tty/n_tty.c:2187 3 locks held by syz-executor122/5344: #0: ffff88807da84410 (sb_writers#10){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1322 [inline] #0: ffff88807da84410 (sb_writers#10){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1308 [inline] #0: ffff88807da84410 (sb_writers#10){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308 #1: ffff888072bebd88 (mapping.invalidate_lock#3){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:826 [inline] #1: ffff888072bebd88 (mapping.invalidate_lock#3){++++}-{3:3}, at: filemap_create_folio mm/filemap.c:2510 [inline] #1: ffff888072bebd88 (mapping.invalidate_lock#3){++++}-{3:3}, at: filemap_get_pages+0xd14/0x1820 mm/filemap.c:2571 #2: ffff888072beb900 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1124 [inline] #2: ffff888072beb900 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_read_folio+0xfc/0x1e0 fs/ntfs3/inode.c:717 2 locks held by syz-executor122/5345: #0: ffff88807da84410 (sb_writers#10){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1322 [inline] #0: ffff88807da84410 (sb_writers#10){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1308 [inline] #0: ffff88807da84410 (sb_writers#10){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308 #1: ffff888072bebbd0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline] #1: ffff888072bebbd0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: ntfs_file_write_iter+0x296/0x1c10 fs/ntfs3/file.c:1063 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc1-next-20230714-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: <TASK> __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:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 57 Comm: kworker/u4:4 Not tainted 6.5.0-rc1-next-20230714-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:602 [inline] RIP: 0010:__mutex_lock+0x14f/0x1340 kernel/locking/mutex.c:747 Code: 29 49 8d 7e 60 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 00 0d 00 00 4d 3b 76 60 0f 85 67 07 00 00 <bf> 01 00 00 00 e8 27 ae 23 f7 49 8d 46 68 31 d2 4d 89 e1 48 89 85 RSP: 0018:ffffc90001587aa0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 1ffffffff1954708 RSI: ffffffff8a6c7cc0 RDI: ffffffff8caa3840 RBP: ffffc90001587bf0 R08: ffffffff81b25fbb R09: 0000000000000001 R10: ffffc90001587c08 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffffff8caa37e0 R15: ffffffff9216b4c0 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056410262d680 CR3: 000000000c776000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <TASK> jump_label_lock kernel/jump_label.c:27 [inline] static_key_disable_cpuslocked+0x10b/0x1b0 kernel/jump_label.c:233 static_key_disable+0x1a/0x20 kernel/jump_label.c:243 toggle_allocation_gate mm/kfence/core.c:836 [inline] toggle_allocation_gate+0x13f/0x250 mm/kfence/core.c:823 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 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:296 RIP: 0000:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
