binder_alloc: 1102: binder_alloc_buf, no vma binder: 1102:1103 transaction failed 29189/-3, size 0-0 line 3035 binder: send failed reply for transaction 3899 to 1102:1103 ====================================================== ------------[ cut here ]------------ WARNING: possible circular locking dependency detected 5.0.0+ #6 Not tainted ------------------------------------------------------ syz-executor.1/1093 is trying to acquire lock: 000000000718ecc4 (&mm->mmap_sem){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] 000000000718ecc4 (&mm->mmap_sem){++++}, at: __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 but task is already holding lock: IRQs not enabled as expected 000000006f909779 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:763 [inline] 000000006f909779 (&sb->s_type->i_mutex_key#11){+.+.}, at: generic_file_write_iter+0xdf/0x610 mm/filemap.c:3358 which lock already depends on the new lock. WARNING: CPU: 0 PID: 3867 at fs/eventpoll.c:1756 ep_poll+0x31e/0xe50 fs/eventpoll.c:1756 the existing dependency chain (in reverse order) is: Kernel panic - not syncing: panic_on_warn set ... -> #2 (&sb->s_type->i_mutex_key#11){+.+.}: CPU: 0 PID: 3867 Comm: udevd Not tainted 5.0.0+ #6 down_write+0x38/0x90 kernel/locking/rwsem.c:70 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 inode_lock include/linux/fs.h:763 [inline] shmem_fallocate+0x15a/0xc60 mm/shmem.c:2633 Call Trace: ashmem_shrink_scan drivers/staging/android/ashmem.c:455 [inline] ashmem_shrink_scan+0x1d7/0x4f0 drivers/staging/android/ashmem.c:439 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x172/0x1f0 lib/dump_stack.c:113 ashmem_ioctl+0x2f0/0x11a0 drivers/staging/android/ashmem.c:797 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0xd6e/0x1390 fs/ioctl.c:696 panic+0x2cb/0x65c kernel/panic.c:214 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (ashmem_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0xf7/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __warn.cold+0x20/0x45 kernel/panic.c:571 ashmem_mmap+0x55/0x520 drivers/staging/android/ashmem.c:361 call_mmap include/linux/fs.h:1874 [inline] mmap_region+0xc37/0x1760 mm/mmap.c:1786 do_mmap+0x8e2/0x1080 mm/mmap.c:1559 report_bug+0x263/0x2b0 lib/bug.c:186 do_mmap_pgoff include/linux/mm.h:2379 [inline] vm_mmap_pgoff+0x1c5/0x230 mm/util.c:350 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 ksys_mmap_pgoff+0x4aa/0x630 mm/mmap.c:1609 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 __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+0x103/0x610 arch/x86/entry/common.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0010:ep_poll+0x31e/0xe50 fs/eventpoll.c:1756 -> #0 (&mm->mmap_sem){++++}: Code: ff 44 89 ee e8 e3 73 ad ff 45 84 ed 0f 85 39 fe ff ff e8 95 72 ad ff 48 c7 c7 e0 3c 76 87 c6 05 62 72 96 07 01 e8 00 bc 80 ff <0f> 0b e9 1a fe ff ff e8 76 72 ad ff 4c 89 f0 48 ba cf f7 53 e3 a5 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 RSP: 0018:ffff888097dc7ce0 EFLAGS: 00010286 down_read+0x3b/0x90 kernel/locking/rwsem.c:24 RAX: 0000000000000000 RBX: ffff8880979a8300 RCX: 0000000000000000 do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 RDX: 0000000000000000 RSI: ffffffff815a90a6 RDI: ffffed1012fb8f8e do_page_fault+0x71/0x581 arch/x86/mm/fault.c:1572 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RBP: ffff888097dc7e98 R08: ffff888097dba2c0 R09: ffffed1015d05021 fault_in_pages_readable include/linux/pagemap.h:611 [inline] iov_iter_fault_in_readable+0x377/0x450 lib/iov_iter.c:425 R10: ffffed1015d05020 R11: ffff8880ae828107 R12: 1ffff11012fb8fa6 R13: 0000000000000000 R14: 0000000000000bb8 R15: 00000000ffffffea generic_perform_write+0x195/0x530 mm/filemap.c:3198 __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3333 generic_file_write_iter+0x360/0x610 mm/filemap.c:3361 call_write_iter include/linux/fs.h:1869 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x613/0x8e0 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0xea/0x1f0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe do_epoll_wait+0x1b3/0x200 fs/eventpoll.c:2216 other info that might help us debug this: __do_sys_epoll_wait fs/eventpoll.c:2226 [inline] __se_sys_epoll_wait fs/eventpoll.c:2223 [inline] __x64_sys_epoll_wait+0x97/0xf0 fs/eventpoll.c:2223 Chain exists of: &mm->mmap_sem --> ashmem_mutex --> &sb->s_type->i_mutex_key#11 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 Possible unsafe locking scenario: entry_SYSCALL_64_after_hwframe+0x49/0xbe CPU0 CPU1 RIP: 0033:0x7fc73b9eb943 ---- ---- Code: 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 90 90 90 90 90 90 83 3d b5 dc 2a 00 00 75 13 49 89 ca b8 e8 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 34 c3 48 83 ec 08 e8 3b c4 00 00 48 89 04 24 lock(&sb->s_type->i_mutex_key#11); RSP: 002b:00007ffcc866c168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 lock(ashmem_mutex); RAX: ffffffffffffffda RBX: 0000000000000bb8 RCX: 00007fc73b9eb943 lock(&sb->s_type->i_mutex_key#11); RDX: 0000000000000008 RSI: 00007ffcc866c260 RDI: 000000000000000a lock(&mm->mmap_sem); RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 *** DEADLOCK *** R10: 0000000000000bb8 R11: 0000000000000246 R12: 0000000000000003 2 locks held by syz-executor.1/1093: R13: 0000000000000000 R14: 0000000000f75880 R15: 0000000000f5c250 #0: 000000008757eece (sb_writers#5){.+.+}, at: file_start_write include/linux/fs.h:2822 [inline] #0: 000000008757eece (sb_writers#5){.+.+}, at: vfs_write+0x429/0x580 fs/read_write.c:548 #1: 000000006f909779 (&sb->s_type->i_mutex_key#11){+.+.}, at: inode_lock include/linux/fs.h:763 [inline] #1: 000000006f909779 (&sb->s_type->i_mutex_key#11){+.+.}, at: generic_file_write_iter+0xdf/0x610 mm/filemap.c:3358 stack backtrace: CPU: 1 PID: 1093 Comm: syz-executor.1 Not tainted 5.0.0+ #6 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+0x172/0x1f0 lib/dump_stack.c:113 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1224 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2350 [inline] __lock_acquire+0x2f00/0x4700 kernel/locking/lockdep.c:3338 lock_acquire+0x16f/0x3f0 kernel/locking/lockdep.c:3841 down_read+0x3b/0x90 kernel/locking/rwsem.c:24 do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 do_page_fault+0x71/0x581 arch/x86/mm/fault.c:1572 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1143 RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:611 [inline] RIP: 0010:iov_iter_fault_in_readable+0x377/0x450 lib/iov_iter.c:425 Code: 89 f6 41 88 57 e0 e8 98 2b 47 fe 45 85 f6 74 c1 e9 70 fe ff ff e8 09 2a 47 fe 0f 1f 00 0f ae e8 44 89 f0 48 8b 8d 68 ff ff ff <8a> 11 89 c3 0f 1f 00 41 88 57 d0 31 ff 89 de e8 65 2b 47 fe 85 db RSP: 0018:ffff88805061f9b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000020400f87 RDX: 0000000000040000 RSI: ffffffff8328b757 RDI: 0000000000000007 RBP: ffff88805061fa58 R08: ffff8880536b4480 R09: fffff940009bb957 R10: fffff940009bb956 R11: ffffea0004ddcab7 R12: 0000000000001000 R13: 0000000000001000 R14: 0000000000000000 R15: ffff88805061fa30 generic_perform_write+0x195/0x530 mm/filemap.c:3198 __generic_file_write_iter+0x25e/0x630 mm/filemap.c:3333 generic_file_write_iter+0x360/0x610 mm/filemap.c:3361 call_write_iter include/linux/fs.h:1869 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x613/0x8e0 fs/read_write.c:487 vfs_write+0x20c/0x580 fs/read_write.c:549 ksys_write+0xea/0x1f0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e29 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc498bfdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 0000000087bb09c6 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc498bfe6d4 R13: 00000000004c7260 R14: 00000000004dcde8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..