====================================================== WARNING: possible circular locking dependency detected 4.18.0+ #193 Not tainted ------------------------------------------------------ syz-executor6/6841 is trying to acquire lock: 000000006736f7e9 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2752 [inline] 000000006736f7e9 (sb_writers#3){.+.+}, at: vfs_fallocate+0x5be/0x8d0 fs/open.c:318 but task is already holding lock: 0000000085e47130 (ashmem_mutex){+.+.}, at: ashmem_shrink_scan+0xb4/0x580 drivers/staging/android/ashmem.c:442 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (ashmem_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x171/0x1700 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 ashmem_mmap+0x53/0x4a0 drivers/staging/android/ashmem.c:361 call_mmap include/linux/fs.h:1813 [inline] mmap_region+0xe39/0x1b50 mm/mmap.c:1762 do_mmap+0xa06/0x1320 mm/mmap.c:1535 do_mmap_pgoff include/linux/mm.h:2306 [inline] vm_mmap_pgoff+0x213/0x2c0 mm/util.c:357 ksys_mmap_pgoff+0x4da/0x660 mm/mmap.c:1585 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&mm->mmap_sem){++++}: __might_fault+0x155/0x1e0 mm/memory.c:4589 _copy_to_user+0x30/0x110 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] filldir+0x1ea/0x3a0 fs/readdir.c:196 dir_emit_dot include/linux/fs.h:3417 [inline] dir_emit_dots include/linux/fs.h:3428 [inline] dcache_readdir+0x13a/0x620 fs/libfs.c:192 iterate_dir+0x4b0/0x5d0 fs/readdir.c:51 __do_sys_getdents fs/readdir.c:231 [inline] __se_sys_getdents fs/readdir.c:212 [inline] __x64_sys_getdents+0x29f/0x510 fs/readdir.c:212 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&sb->s_type->i_mutex_key#10){++++}: down_write+0x8f/0x130 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:730 [inline] generic_file_write_iter+0xed/0x870 mm/filemap.c:3289 call_write_iter include/linux/fs.h:1808 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6af/0x9d0 fs/read_write.c:487 vfs_write+0x1f8/0x560 fs/read_write.c:549 kernel_write+0xab/0x120 fs/read_write.c:526 fork_usermode_blob+0x11c/0x1b0 kernel/umh.c:493 load_umh+0x2b/0xbd net/bpfilter/bpfilter_kern.c:93 do_one_initcall+0x127/0x913 init/main.c:884 do_initcall_level init/main.c:952 [inline] do_initcalls init/main.c:960 [inline] do_basic_setup init/main.c:978 [inline] kernel_init_freeable+0x49b/0x58e init/main.c:1142 kernel_init+0x11/0x1b3 init/main.c:1061 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 -> #0 (sb_writers#3){.+.+}: lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x1e9/0x300 fs/super.c:1403 file_start_write include/linux/fs.h:2752 [inline] vfs_fallocate+0x5be/0x8d0 fs/open.c:318 ashmem_shrink_scan+0x1f9/0x580 drivers/staging/android/ashmem.c:449 ashmem_ioctl+0x3dd/0x13c0 drivers/staging/android/ashmem.c:791 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: sb_writers#3 --> &mm->mmap_sem --> ashmem_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ashmem_mutex); lock(&mm->mmap_sem); lock(ashmem_mutex); lock(sb_writers#3); *** DEADLOCK *** 1 lock held by syz-executor6/6841: #0: 0000000085e47130 (ashmem_mutex){+.+.}, at: ashmem_shrink_scan+0xb4/0x580 drivers/staging/android/ashmem.c:442 stack backtrace: CPU: 0 PID: 6841 Comm: syz-executor6 Not tainted 4.18.0+ #193 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+0x1c9/0x2b4 lib/dump_stack.c:113 print_circular_bug.isra.37.cold.58+0x1bd/0x27d kernel/locking/lockdep.c:1227 check_prev_add kernel/locking/lockdep.c:1867 [inline] check_prevs_add kernel/locking/lockdep.c:1980 [inline] validate_chain kernel/locking/lockdep.c:2421 [inline] __lock_acquire+0x3449/0x5020 kernel/locking/lockdep.c:3435 lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x1e9/0x300 fs/super.c:1403 file_start_write include/linux/fs.h:2752 [inline] vfs_fallocate+0x5be/0x8d0 fs/open.c:318 ashmem_shrink_scan+0x1f9/0x580 drivers/staging/android/ashmem.c:449 ashmem_ioctl+0x3dd/0x13c0 drivers/staging/android/ashmem.c:791 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:684 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:706 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9111b34c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f9111b356d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 000000000000770a RDI: 0000000000000003 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cd2f0 R14: 00000000004c3dca R15: 0000000000000000 (unnamed net_device) (uninitialized): option min_links: invalid value (18446744073709551615) (unnamed net_device) (uninitialized): option min_links: allowed values 0 - 2147483647 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 7065 Comm: syz-executor4 Not tainted 4.18.0+ #193 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+0x1c9/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x2af/0x760 mm/slab.c:3552 anon_vma_chain_alloc mm/rmap.c:129 [inline] __anon_vma_prepare+0xc4/0x720 mm/rmap.c:183 anon_vma_prepare include/linux/rmap.h:153 [inline] do_huge_pmd_anonymous_page+0x13df/0x1b70 mm/huge_memory.c:675 create_huge_pmd mm/memory.c:3885 [inline] __handle_mm_fault+0x2cbf/0x4360 mm/memory.c:4089 handle_mm_fault+0x53e/0xc80 mm/memory.c:4155 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1394 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1469 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1161 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff880195ae7cb8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000090 RCX: 0000000000000090 RDX: 0000000000000090 RSI: ffff880195ae7d20 RDI: 00000000200000c0 RBP: ffff880195ae7cf0 R08: ffffed0032b5cfb6 R09: ffffed0032b5cfb6 R10: ffffed0032b5cfb5 R11: ffff880195ae7daf R12: 0000000020000150 R13: 00000000200000c0 R14: ffff880195ae7d20 R15: 00007ffffffff000 copy_to_user include/linux/uaccess.h:155 [inline] __do_sys_getrusage+0xd1/0x140 kernel/sys.c:1802 __se_sys_getrusage kernel/sys.c:1793 [inline] __x64_sys_getrusage+0x54/0x80 kernel/sys.c:1793 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9fa1fdac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000062 RAX: ffffffffffffffda RBX: 00007f9fa1fdb6d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000004cbec8 R14: 00000000004c35ff R15: 0000000000000000 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7082 Comm: syz-executor4 Not tainted 4.18.0+ #193 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+0x1c9/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x2af/0x760 mm/slab.c:3552 anon_vma_alloc mm/rmap.c:82 [inline] __anon_vma_prepare+0x3c6/0x720 mm/rmap.c:190 anon_vma_prepare include/linux/rmap.h:153 [inline] do_huge_pmd_anonymous_page+0x13df/0x1b70 mm/huge_memory.c:675 create_huge_pmd mm/memory.c:3885 [inline] __handle_mm_fault+0x2cbf/0x4360 mm/memory.c:4089 handle_mm_fault+0x53e/0xc80 mm/memory.c:4155 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1394 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1469 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1161 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff880196337cb8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000090 RCX: 0000000000000090 RDX: 0000000000000090 RSI: ffff880196337d20 RDI: 00000000200000c0 RBP: ffff880196337cf0 R08: ffffed0032c66fb6 R09: ffffed0032c66fb6 R10: ffffed0032c66fb5 R11: ffff880196337daf R12: 0000000020000150 R13: 00000000200000c0 R14: ffff880196337d20 R15: 00007ffffffff000 copy_to_user include/linux/uaccess.h:155 [inline] __do_sys_getrusage+0xd1/0x140 kernel/sys.c:1802 __se_sys_getrusage kernel/sys.c:1793 [inline] __x64_sys_getrusage+0x54/0x80 kernel/sys.c:1793 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9fa1fdac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000062 RAX: ffffffffffffffda RBX: 00007f9fa1fdb6d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000004cbec8 R14: 00000000004c35ff R15: 0000000000000001 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 7118 Comm: syz-executor4 Not tainted 4.18.0+ #193 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+0x1c9/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x2af/0x760 mm/slab.c:3552 kmem_cache_zalloc include/linux/slab.h:697 [inline] alloc_mm_slot mm/khugepaged.c:369 [inline] __khugepaged_enter+0xbe/0x5e0 mm/khugepaged.c:405 khugepaged_enter include/linux/khugepaged.h:54 [inline] do_huge_pmd_anonymous_page+0x1456/0x1b70 mm/huge_memory.c:677 create_huge_pmd mm/memory.c:3885 [inline] __handle_mm_fault+0x2cbf/0x4360 mm/memory.c:4089 handle_mm_fault+0x53e/0xc80 mm/memory.c:4155 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1394 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1469 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1161 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff880195be7cb8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000090 RCX: 0000000000000090 RDX: 0000000000000090 RSI: ffff880195be7d20 RDI: 00000000200000c0 RBP: ffff880195be7cf0 R08: ffffed0032b7cfb6 R09: ffffed0032b7cfb6 R10: ffffed0032b7cfb5 R11: ffff880195be7daf R12: 0000000020000150 R13: 00000000200000c0 R14: ffff880195be7d20 R15: 00007ffffffff000 copy_to_user include/linux/uaccess.h:155 [inline] __do_sys_getrusage+0xd1/0x140 kernel/sys.c:1802 __se_sys_getrusage kernel/sys.c:1793 [inline] __x64_sys_getrusage+0x54/0x80 kernel/sys.c:1793 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9fa1fdac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000062 RAX: ffffffffffffffda RBX: 00007f9fa1fdb6d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000004cbec8 R14: 00000000004c35ff R15: 0000000000000002 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 7133 Comm: syz-executor4 Not tainted 4.18.0+ #193 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+0x1c9/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:3058 [inline] prepare_alloc_pages mm/page_alloc.c:4326 [inline] __alloc_pages_nodemask+0x36e/0xdb0 mm/page_alloc.c:4364 __alloc_pages include/linux/gfp.h:456 [inline] __alloc_pages_node include/linux/gfp.h:469 [inline] alloc_pages_vma+0x3a0/0x540 mm/mempolicy.c:2049 do_huge_pmd_anonymous_page+0x61c/0x1b70 mm/huge_memory.c:719 create_huge_pmd mm/memory.c:3885 [inline] __handle_mm_fault+0x2cbf/0x4360 mm/memory.c:4089 handle_mm_fault+0x53e/0xc80 mm/memory.c:4155 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1394 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1469 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1161 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff880194a3fcb8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000090 RCX: 0000000000000090 RDX: 0000000000000090 RSI: ffff880194a3fd20 RDI: 00000000200000c0 RBP: ffff880194a3fcf0 R08: ffffed0032947fb6 R09: ffffed0032947fb6 R10: ffffed0032947fb5 R11: ffff880194a3fdaf R12: 0000000020000150 R13: 00000000200000c0 R14: ffff880194a3fd20 R15: 00007ffffffff000 copy_to_user include/linux/uaccess.h:155 [inline] __do_sys_getrusage+0xd1/0x140 kernel/sys.c:1802 __se_sys_getrusage kernel/sys.c:1793 [inline] __x64_sys_getrusage+0x54/0x80 kernel/sys.c:1793 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9fa1fdac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000062 RAX: ffffffffffffffda RBX: 00007f9fa1fdb6d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000004cbec8 R14: 00000000004c35ff R15: 0000000000000003 FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7163 Comm: syz-executor4 Not tainted 4.18.0+ #193 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+0x1c9/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 should_fail_alloc_page mm/page_alloc.c:3058 [inline] prepare_alloc_pages mm/page_alloc.c:4326 [inline] __alloc_pages_nodemask+0x36e/0xdb0 mm/page_alloc.c:4364 alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:492 [inline] pte_alloc_one+0x1b/0x1a0 arch/x86/mm/pgtable.c:35 __do_huge_pmd_anonymous_page mm/huge_memory.c:561 [inline] do_huge_pmd_anonymous_page+0x8be/0x1b70 mm/huge_memory.c:725 create_huge_pmd mm/memory.c:3885 [inline] __handle_mm_fault+0x2cbf/0x4360 mm/memory.c:4089 handle_mm_fault+0x53e/0xc80 mm/memory.c:4155 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1394 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1469 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1161 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff88019505fcb8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000090 RCX: 0000000000000090 RDX: 0000000000000090 RSI: ffff88019505fd20 RDI: 00000000200000c0 RBP: ffff88019505fcf0 R08: ffffed0032a0bfb6 R09: ffffed0032a0bfb6 R10: ffffed0032a0bfb5 R11: ffff88019505fdaf R12: 0000000020000150 R13: 00000000200000c0 R14: ffff88019505fd20 R15: 00007ffffffff000 copy_to_user include/linux/uaccess.h:155 [inline] __do_sys_getrusage+0xd1/0x140 kernel/sys.c:1802 __se_sys_getrusage kernel/sys.c:1793 [inline] __x64_sys_getrusage+0x54/0x80 kernel/sys.c:1793 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9fa1fdac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000062 RAX: ffffffffffffffda RBX: 00007f9fa1fdb6d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000004cbec8 R14: 00000000004c35ff R15: 0000000000000004 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 7187 Comm: syz-executor4 Not tainted 4.18.0+ #193 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+0x1c9/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x11 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3378 [inline] kmem_cache_alloc+0x2af/0x760 mm/slab.c:3552 ptlock_alloc+0x20/0x80 mm/memory.c:4746 ptlock_init include/linux/mm.h:1877 [inline] pgtable_page_ctor include/linux/mm.h:1911 [inline] pte_alloc_one+0x6b/0x1a0 arch/x86/mm/pgtable.c:38 __do_huge_pmd_anonymous_page mm/huge_memory.c:561 [inline] do_huge_pmd_anonymous_page+0x8be/0x1b70 mm/huge_memory.c:725 create_huge_pmd mm/memory.c:3885 [inline] __handle_mm_fault+0x2cbf/0x4360 mm/memory.c:4089 handle_mm_fault+0x53e/0xc80 mm/memory.c:4155 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1394 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1469 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1161 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:180 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 RSP: 0018:ffff880195267cb8 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000090 RCX: 0000000000000090 RDX: 0000000000000090 RSI: ffff880195267d20 RDI: 00000000200000c0 RBP: ffff880195267cf0 R08: ffffed0032a4cfb6 R09: ffffed0032a4cfb6 R10: ffffed0032a4cfb5 R11: ffff880195267daf R12: 0000000020000150 R13: 00000000200000c0 R14: ffff880195267d20 R15: 00007ffffffff000 copy_to_user include/linux/uaccess.h:155 [inline] __do_sys_getrusage+0xd1/0x140 kernel/sys.c:1802 __se_sys_getrusage kernel/sys.c:1793 [inline] __x64_sys_getrusage+0x54/0x80 kernel/sys.c:1793 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9fa1fdac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000062 RAX: ffffffffffffffda RBX: 00007f9fa1fdb6d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000004cbec8 R14: 00000000004c35ff R15: 0000000000000005