INFO: task syz-executor.0:18498 blocked for more than 143 seconds. Not tainted 5.19.0-rc4-syzkaller-00036-gd9b2ba67917c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:26752 pid:18498 ppid: 3642 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6458 schedule+0xeb/0x1b0 kernel/sched/core.c:6530 rwsem_down_read_slowpath+0x5ce/0x8f0 kernel/locking/rwsem.c:1077 __down_read_common+0x54/0x2a0 kernel/locking/rwsem.c:1242 filemap_invalidate_lock_shared include/linux/fs.h:796 [inline] filemap_fault+0x2c4/0xf20 mm/filemap.c:3140 __do_fault+0x139/0x4f0 mm/memory.c:4165 do_read_fault mm/memory.c:4511 [inline] do_fault mm/memory.c:4640 [inline] handle_pte_fault mm/memory.c:4903 [inline] __handle_mm_fault mm/memory.c:5042 [inline] handle_mm_fault+0x2c1c/0x3f20 mm/memory.c:5140 do_user_addr_fault+0x6ae/0xca0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1484 [inline] exc_page_fault+0x7a/0x120 arch/x86/mm/fault.c:1540 asm_exc_page_fault+0x27/0x30 RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:72 [inline] RIP: 0010:strncpy_from_user+0x245/0x330 lib/strncpy_from_user.c:139 Code: 0f af e8 48 c1 ed 38 49 01 ef e9 98 00 00 00 e8 b1 34 26 fd 90 31 ff 4c 89 ee e8 66 39 26 fd 49 83 ed 01 72 4e e8 9b 34 26 fd <43> 8a 1c 3c 48 8b 04 24 4a 8d 2c 38 48 89 e8 48 c1 e8 03 48 b9 00 RSP: 0018:ffffc900060dfcc0 EFLAGS: 00050293 RAX: ffffffff846148e5 RBX: 0000000000000fe0 RCX: ffff888073b23b00 RDX: 0000000000000000 RSI: 0000000000000fe0 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff846148da R09: fffff940003f4fc1 R10: fffff940003f4fc1 R11: 1ffffd40003f4fc0 R12: 0000000020000340 R13: 0000000000000fdf R14: ffff88807e9fb320 R15: 0000000000000000 getname_flags+0xf5/0x4e0 fs/namei.c:150 do_sys_openat2+0xd2/0x500 fs/open.c:1272 do_sys_open fs/open.c:1294 [inline] __do_sys_openat fs/open.c:1310 [inline] __se_sys_openat fs/open.c:1305 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1305 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7ff681289109 RSP: 002b:00007ff68243d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ff68139c100 RCX: 00007ff681289109 RDX: 0000000000000000 RSI: 0000000020000340 RDI: ffffffffffffff9c RBP: 00007ff6812e305d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd0e8639af R14: 00007ff68243d300 R15: 0000000000022000 INFO: task syz-executor.5:18514 blocked for more than 143 seconds. Not tainted 5.19.0-rc4-syzkaller-00036-gd9b2ba67917c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27584 pid:18514 ppid: 3646 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5146 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6458 schedule+0xeb/0x1b0 kernel/sched/core.c:6530 rwsem_down_write_slowpath+0xe21/0x1370 kernel/locking/rwsem.c:1172 __down_write_common kernel/locking/rwsem.c:1287 [inline] __down_write kernel/locking/rwsem.c:1296 [inline] down_write+0x163/0x170 kernel/locking/rwsem.c:1543 filemap_invalidate_lock include/linux/fs.h:786 [inline] blk_ioctl_zeroout block/ioctl.c:182 [inline] blkdev_common_ioctl+0x155c/0x2390 block/ioctl.c:485 blkdev_ioctl+0x2f2/0x760 block/ioctl.c:608 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f29e9289109 RSP: 002b:00007f29ea3e7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f29e939c030 RCX: 00007f29e9289109 RDX: 0000000020000100 RSI: 000000000000127f RDI: 0000000000000003 RBP: 00007f29e92e305d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcc1d4b95f R14: 00007f29ea3e7300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/28: #0: ffffffff8cb1e820 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 4 locks held by kworker/u4:5/1086: 2 locks held by getty/3290: #0: ffff888026c4d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2124 3 locks held by syz-executor.0/18497: 2 locks held by syz-executor.0/18498: #0: ffff88807b86d528 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:136 [inline] #0: ffff88807b86d528 (&mm->mmap_lock#2){++++}-{3:3}, at: do_user_addr_fault+0x2f0/0xca0 arch/x86/mm/fault.c:1338 #1: ffff888140c913c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:796 [inline] #1: ffff888140c913c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_fault+0x2c4/0xf20 mm/filemap.c:3140 1 lock held by syz-executor.5/18514: #0: ffff888140c913c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:786 [inline] #0: ffff888140c913c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:182 [inline] #0: ffff888140c913c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x155c/0x2390 block/ioctl.c:485 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc4-syzkaller-00036-gd9b2ba67917c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xcf9/0xd40 kernel/hung_task.c:369 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 18497 Comm: syz-executor.0 Not tainted 5.19.0-rc4-syzkaller-00036-gd9b2ba67917c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_kcov_mode kernel/kcov.c:177 [inline] RIP: 0010:write_comp_data kernel/kcov.c:229 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x33/0xa0 kernel/kcov.c:304 Code: 00 6f 02 00 65 8b 0d b4 ec 7a 7e f7 c1 00 01 ff 00 74 11 f7 c1 00 01 00 00 74 76 83 ba a4 15 00 00 00 74 6d 8b 8a 80 15 00 00 <83> f9 03 75 62 48 8b 8a 88 15 00 00 44 8b 8a 84 15 00 00 49 c1 e1 RSP: 0018:ffffc90006aee1b8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 00fff00000000001 RCX: 0000000000000000 RDX: ffff88801c7d5880 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90006aee450 R08: ffffffff81ba2778 R09: fffff940004598e1 R10: fffff940004598e1 R11: 1ffffd40004598e0 R12: 1ffffd40004598e0 R13: ffffea00022cc6c8 R14: ffffea00022cc700 R15: ffffea00022cc6d0 FS: 00007ff68245f700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c017a4f000 CR3: 000000007c856000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: constant_test_bit arch/x86/include/asm/bitops.h:207 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] folio_test_lru include/linux/page-flags.h:500 [inline] shrink_page_list+0x1c88/0x6260 mm/vmscan.c:1960 shrink_inactive_list+0x64b/0xca0 mm/vmscan.c:2386 shrink_list mm/vmscan.c:2616 [inline] shrink_lruvec+0x489/0xc60 mm/vmscan.c:2933 shrink_node_memcgs+0x358/0x6f0 mm/vmscan.c:3122 shrink_node+0xe86/0x1fe0 mm/vmscan.c:3245 shrink_zones+0x4fb/0xc40 mm/vmscan.c:3482 do_try_to_free_pages+0x1e4/0xcd0 mm/vmscan.c:3540 try_to_free_mem_cgroup_pages+0x3bd/0x6b0 mm/vmscan.c:3854 reclaim_high+0x1f4/0x280 mm/memcontrol.c:2333 mem_cgroup_handle_over_high+0x145/0x2b0 mm/memcontrol.c:2517 try_charge_memcg+0x10ae/0x1100 mm/memcontrol.c:2746 try_charge mm/memcontrol.c:2757 [inline] charge_memcg+0xf1/0x5c0 mm/memcontrol.c:6720 __mem_cgroup_charge+0x23/0x80 mm/memcontrol.c:6741 mem_cgroup_charge include/linux/memcontrol.h:689 [inline] __filemap_add_folio+0xe89/0x19a0 mm/filemap.c:857 filemap_add_folio+0x12c/0x5c0 mm/filemap.c:959 page_cache_ra_unbounded+0x220/0x640 mm/readahead.c:245 do_sync_mmap_readahead+0x76d/0x960 mm/filemap.c:3056 filemap_fault+0x349/0xf20 mm/filemap.c:3148 __do_fault+0x139/0x4f0 mm/memory.c:4165 do_read_fault mm/memory.c:4511 [inline] do_fault mm/memory.c:4640 [inline] handle_pte_fault mm/memory.c:4903 [inline] __handle_mm_fault mm/memory.c:5042 [inline] handle_mm_fault+0x2c1c/0x3f20 mm/memory.c:5140 faultin_page mm/gup.c:953 [inline] __get_user_pages+0x511/0x1170 mm/gup.c:1174 populate_vma_page_range+0x216/0x2b0 mm/gup.c:1518 __mm_populate+0x2ea/0x4d0 mm/gup.c:1631 mm_populate include/linux/mm.h:2706 [inline] vm_mmap_pgoff+0x241/0x2f0 mm/util.c:557 ksys_mmap_pgoff+0x48c/0x6d0 mm/mmap.c:1633 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7ff681289109 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff68245f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007ff68139c030 RCX: 00007ff681289109 RDX: 0000000000000002 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007ff6812e305d R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000028011 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd0e8639af R14: 00007ff68245f300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 0f af e8 imul %eax,%ebp 3: 48 c1 ed 38 shr $0x38,%rbp 7: 49 01 ef add %rbp,%r15 a: e9 98 00 00 00 jmpq 0xa7 f: e8 b1 34 26 fd callq 0xfd2634c5 14: 90 nop 15: 31 ff xor %edi,%edi 17: 4c 89 ee mov %r13,%rsi 1a: e8 66 39 26 fd callq 0xfd263985 1f: 49 83 ed 01 sub $0x1,%r13 23: 72 4e jb 0x73 25: e8 9b 34 26 fd callq 0xfd2634c5 * 2a: 43 8a 1c 3c mov (%r12,%r15,1),%bl <-- trapping instruction 2e: 48 8b 04 24 mov (%rsp),%rax 32: 4a 8d 2c 38 lea (%rax,%r15,1),%rbp 36: 48 89 e8 mov %rbp,%rax 39: 48 c1 e8 03 shr $0x3,%rax 3d: 48 rex.W 3e: b9 .byte 0xb9