====================================================== WARNING: possible circular locking dependency detected 5.0.0-rc6+ #75 Not tainted ------------------------------------------------------ syz-executor.5/13207 is trying to acquire lock: 000000000214e3b0 (&mm->mmap_sem){++++}, at: do_user_addr_fault arch/x86/mm/fault.c:1426 [inline] 000000000214e3b0 (&mm->mmap_sem){++++}, at: __do_page_fault+0x9c2/0xd60 arch/x86/mm/fault.c:1541 but task is already holding lock: 000000007ed39ada (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] 000000007ed39ada (&sb->s_type->i_mutex_key#12){+.+.}, at: generic_file_write_iter+0xdf/0x610 mm/filemap.c:3358 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sb->s_type->i_mutex_key#12){+.+.}: down_write+0x38/0x90 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:757 [inline] shmem_fallocate+0x15a/0xc60 mm/shmem.c:2633 ashmem_shrink_scan drivers/staging/android/ashmem.c:455 [inline] ashmem_shrink_scan+0x1d7/0x4f0 drivers/staging/android/ashmem.c:439 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 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 ashmem_mmap+0x55/0x520 drivers/staging/android/ashmem.c:361 call_mmap include/linux/fs.h:1868 [inline] mmap_region+0xc37/0x1760 mm/mmap.c:1786 do_mmap+0x8e2/0x1080 mm/mmap.c:1559 do_mmap_pgoff include/linux/mm.h:2379 [inline] vm_mmap_pgoff+0x1c5/0x230 mm/util.c:350 ksys_mmap_pgoff+0x4aa/0x630 mm/mmap.c:1609 __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 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&mm->mmap_sem){++++}: 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 fault_in_pages_readable include/linux/pagemap.h:611 [inline] iov_iter_fault_in_readable+0x377/0x450 lib/iov_iter.c:425 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:1863 [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 other info that might help us debug this: Chain exists of: &mm->mmap_sem --> ashmem_mutex --> &sb->s_type->i_mutex_key#12 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#12); lock(ashmem_mutex); lock(&sb->s_type->i_mutex_key#12); lock(&mm->mmap_sem); *** DEADLOCK *** 3 locks held by syz-executor.5/13207: #0: 0000000018f8fe83 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:795 #1: 00000000f8005feb (sb_writers#6){.+.+}, at: file_start_write include/linux/fs.h:2816 [inline] #1: 00000000f8005feb (sb_writers#6){.+.+}, at: vfs_write+0x429/0x580 fs/read_write.c:548 #2: 000000007ed39ada (&sb->s_type->i_mutex_key#12){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] #2: 000000007ed39ada (&sb->s_type->i_mutex_key#12){+.+.}, at: generic_file_write_iter+0xdf/0x610 mm/filemap.c:3358 stack backtrace: CPU: 1 PID: 13207 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #75 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 58 2c 47 fe 45 85 f6 74 c1 e9 70 fe ff ff e8 c9 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 25 2c 47 fe 85 db RSP: 0018:ffff88805a2ff9b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000202009bf RDX: 0000000000040000 RSI: ffffffff8328b6b7 RDI: 0000000000000007 RBP: ffff88805a2ffa58 R08: ffff88809870a140 R09: fffff9400033c9ef R10: fffff9400033c9ee R11: ffffea00019e4f77 R12: 0000000000001000 R13: 0000000000001000 R14: 0000000000000000 R15: ffff88805a2ffa30 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:1863 [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:00007fdf6d332c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 000000000d4b9afd RSI: 00000000200009c0 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdf6d3336d4 R13: 00000000004c7272 R14: 00000000004dcd78 R15: 00000000ffffffff kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 13230 Comm: syz-executor.4 Not tainted 5.0.0-rc6+ #75 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 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 __should_fail_alloc_page mm/page_alloc.c:3152 [inline] should_fail_alloc_page+0x50/0x60 mm/page_alloc.c:3199 prepare_alloc_pages mm/page_alloc.c:4476 [inline] __alloc_pages_nodemask+0x1a1/0x710 mm/page_alloc.c:4523 alloc_pages_current+0x107/0x210 mm/mempolicy.c:2106 alloc_pages include/linux/gfp.h:509 [inline] pte_alloc_one+0x1b/0x1a0 arch/x86/mm/pgtable.c:35 do_fault_around mm/memory.c:3385 [inline] do_read_fault mm/memory.c:3425 [inline] do_fault mm/memory.c:3556 [inline] handle_pte_fault mm/memory.c:3787 [inline] __handle_mm_fault+0x34e4/0x3f20 mm/memory.c:3911 handle_mm_fault+0x43f/0xb30 mm/memory.c:3948 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline] __do_page_fault+0x5da/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:__get_user_4+0x21/0x30 arch/x86/lib/getuser.S:78 Code: 50 ff 31 c0 0f 1f 00 c3 90 48 83 c0 03 72 55 65 48 8b 14 25 40 ee 01 00 48 3b 82 18 14 00 00 73 43 48 19 d2 48 21 d0 0f 1f 00 <8b> 50 fd 31 c0 0f 1f 00 c3 66 0f 1f 44 00 00 48 83 c0 07 72 25 65 RSP: 0018:ffff88808a957d60 EFLAGS: 00010206 RAX: 00007f481d7f6003 RBX: 1ffff1101152afaf RCX: ffffc9000e6bf000 RDX: ffffffffffffffff RSI: ffffffff819918f3 RDI: 0000000000000286 RBP: ffff88808a957e00 R08: ffff888092dc6200 R09: 0000000000000000 R10: ffff88808a957f20 R11: 0000000000000000 R12: ffff888092dc6200 R13: ffff888085a78540 R14: ffff88808a957dd8 R15: 1ffff1101152afc6 __do_sys_io_submit fs/aio.c:1935 [inline] __se_sys_io_submit fs/aio.c:1924 [inline] __x64_sys_io_submit+0x122/0x580 fs/aio.c:1924 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:00007f481d816c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f481d816c90 RCX: 0000000000457e29 RDX: 0000000020000180 RSI: 0000000000000001 RDI: 00007f481d7f6000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f481d8176d4 R13: 00000000004bf030 R14: 00000000004d0910 R15: 0000000000000004 kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 13239 Comm: syz-executor.4 Not tainted 5.0.0-rc6+ #75 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 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 __should_failslab+0x121/0x190 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1603 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3367 [inline] kmem_cache_alloc+0x2be/0x710 mm/slab.c:3541 ptlock_alloc+0x20/0x70 mm/memory.c:4577 ptlock_init include/linux/mm.h:1955 [inline] pgtable_page_ctor include/linux/mm.h:1982 [inline] pte_alloc_one+0x6d/0x1a0 arch/x86/mm/pgtable.c:38 do_fault_around mm/memory.c:3385 [inline] do_read_fault mm/memory.c:3425 [inline] do_fault mm/memory.c:3556 [inline] handle_pte_fault mm/memory.c:3787 [inline] __handle_mm_fault+0x34e4/0x3f20 mm/memory.c:3911 handle_mm_fault+0x43f/0xb30 mm/memory.c:3948 do_user_addr_fault arch/x86/mm/fault.c:1475 [inline] __do_page_fault+0x5da/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:__get_user_4+0x21/0x30 arch/x86/lib/getuser.S:78 Code: 50 ff 31 c0 0f 1f 00 c3 90 48 83 c0 03 72 55 65 48 8b 14 25 40 ee 01 00 48 3b 82 18 14 00 00 73 43 48 19 d2 48 21 d0 0f 1f 00 <8b> 50 fd 31 c0 0f 1f 00 c3 66 0f 1f 44 00 00 48 83 c0 07 72 25 65 RSP: 0018:ffff88808abafd60 EFLAGS: 00010206 RAX: 00007f481d7f6003 RBX: 1ffff11011575faf RCX: ffffc9000e6bf000 RDX: ffffffffffffffff RSI: ffffffff819918f3 RDI: 0000000000000286 RBP: ffff88808abafe00 R08: ffff8880a0f94580 R09: 0000000000000000 R10: ffff88808abaff20 R11: 0000000000000000 R12: ffff8880a0f94580 R13: ffff88808b194c00 R14: ffff88808abafdd8 R15: 1ffff11011575fc6 __do_sys_io_submit fs/aio.c:1935 [inline] __se_sys_io_submit fs/aio.c:1924 [inline] __x64_sys_io_submit+0x122/0x580 fs/aio.c:1924 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:00007f481d816c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f481d816c90 RCX: 0000000000457e29 RDX: 0000000020000180 RSI: 0000000000000001 RDI: 00007f481d7f6000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f481d8176d4 R13: 00000000004bf030 R14: 00000000004d0910 R15: 0000000000000004 kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 13252 Comm: syz-executor.4 Not tainted 5.0.0-rc6+ #75 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 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0x1b lib/fault-inject.c:149 __should_failslab+0x121/0x190 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1603 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc mm/slab.c:3367 [inline] kmem_cache_alloc+0x2be/0x710 mm/slab.c:3541 aio_get_req fs/aio.c:1019 [inline] __io_submit_one fs/aio.c:1828 [inline] io_submit_one+0x131/0x1cf0 fs/aio.c:1909 __do_sys_io_submit fs/aio.c:1954 [inline] __se_sys_io_submit fs/aio.c:1924 [inline] __x64_sys_io_submit+0x1bd/0x580 fs/aio.c:1924 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:00007f481d816c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f481d816c90 RCX: 0000000000457e29 RDX: 0000000020000180 RSI: 0000000000000001 RDI: 00007f481d7f6000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f481d8176d4 R13: 00000000004bf030 R14: 00000000004d0910 R15: 0000000000000004 net_ratelimit: 20622 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:7a:d6:b4:11:49:ee, vlan:0) kobject: 'loop5' (00000000a91e0150): kobject_uevent_env bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:7a:d6:b4:11:49:ee, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' syz-executor.5 invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 1 PID: 13336 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #75 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 dump_header+0x10f/0xb6c mm/oom_kill.c:451 oom_kill_process.cold+0x10/0x6f5 mm/oom_kill.c:966 out_of_memory mm/oom_kill.c:1141 [inline] out_of_memory+0x79a/0x1280 mm/oom_kill.c:1074 mem_cgroup_out_of_memory+0x99/0xe0 mm/memcontrol.c:1393 mem_cgroup_oom mm/memcontrol.c:1721 [inline] try_charge+0xfec/0x1570 mm/memcontrol.c:2283 mem_cgroup_try_charge+0x24d/0x5e0 mm/memcontrol.c:5913 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:5928 shmem_getpage_gfp+0x69b/0x3520 mm/shmem.c:1790 shmem_getpage mm/shmem.c:134 [inline] shmem_write_begin+0x105/0x1e0 mm/shmem.c:2385 generic_perform_write+0x231/0x530 mm/filemap.c:3208 __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:1863 [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:00007fdf6d332c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 000000000d4b9afd RSI: 00000000200009c0 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdf6d3336d4 R13: 00000000004c7272 R14: 00000000004dcd78 R15: 00000000ffffffff memory: usage 306816kB, limit 307200kB, failcnt 43 memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: cache:243836KB rss:49800KB rss_huge:47104KB shmem:243752KB mapped_file:0KB dirty:132KB writeback:0KB swap:0KB inactive_anon:243908KB active_anon:49800KB inactive_file:16KB active_file:8KB unevictable:0KB oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz5,mems_allowed=0-1,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=12013,uid=0 Memory cgroup out of memory: Kill process 12013 (syz-executor.5) score 1114 or sacrifice child Killed process 12013 (syz-executor.5) total-vm:72712kB, anon-rss:2212kB, file-rss:35888kB, shmem-rss:0kB kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' syz-executor.5 invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 CPU: 1 PID: 13347 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #75 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 dump_header+0x10f/0xb6c mm/oom_kill.c:451 oom_kill_process.cold+0x10/0x6f5 mm/oom_kill.c:966 out_of_memory mm/oom_kill.c:1141 [inline] out_of_memory+0x79a/0x1280 mm/oom_kill.c:1074 mem_cgroup_out_of_memory+0x99/0xe0 mm/memcontrol.c:1393 mem_cgroup_oom mm/memcontrol.c:1721 [inline] try_charge+0xfec/0x1570 mm/memcontrol.c:2283 mem_cgroup_try_charge+0x24d/0x5e0 mm/memcontrol.c:5913 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:5928 shmem_getpage_gfp+0x69b/0x3520 mm/shmem.c:1790 shmem_getpage mm/shmem.c:134 [inline] shmem_write_begin+0x105/0x1e0 mm/shmem.c:2385 generic_perform_write+0x231/0x530 mm/filemap.c:3208 __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:1863 [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:00007fdf6d332c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 000000000d4b9afd RSI: 00000000200009c0 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdf6d3336d4 R13: 00000000004c7272 R14: 00000000004dcd78 R15: 00000000ffffffff memory: usage 307192kB, limit 307200kB, failcnt 77 memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: cache:246344KB rss:47680KB rss_huge:45056KB shmem:246260KB mapped_file:0KB dirty:132KB writeback:0KB swap:0KB inactive_anon:246440KB active_anon:47792KB inactive_file:4KB active_file:4KB unevictable:0KB oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz5,mems_allowed=0-1,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=12169,uid=0 Memory cgroup out of memory: Kill process 12169 (syz-executor.5) score 1114 or sacrifice child Killed process 12169 (syz-executor.5) total-vm:72712kB, anon-rss:2212kB, file-rss:35868kB, shmem-rss:0kB syz-executor.5 invoked oom-killer: gfp_mask=0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), order=3, oom_score_adj=1000 CPU: 1 PID: 13345 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #75 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 dump_header+0x10f/0xb6c mm/oom_kill.c:451 oom_kill_process.cold+0x10/0x6f5 mm/oom_kill.c:966 out_of_memory mm/oom_kill.c:1141 [inline] out_of_memory+0x79a/0x1280 mm/oom_kill.c:1074 mem_cgroup_out_of_memory+0x99/0xe0 mm/memcontrol.c:1393 mem_cgroup_oom mm/memcontrol.c:1721 [inline] try_charge+0xb4a/0x1570 mm/memcontrol.c:2283 memcg_kmem_charge_memcg+0x7c/0x130 mm/memcontrol.c:2591 memcg_kmem_charge+0x13b/0x340 mm/memcontrol.c:2624 __alloc_pages_nodemask+0x437/0x710 mm/page_alloc.c:4559 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] alloc_pages_node include/linux/gfp.h:500 [inline] alloc_thread_stack_node kernel/fork.c:246 [inline] dup_task_struct kernel/fork.c:849 [inline] copy_process.part.0+0x3e0/0x79a0 kernel/fork.c:1753 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a7f9 Code: ff 48 85 f6 0f 84 d7 8e fb ff 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 0f 8c ae 8e fb ff 74 01 c3 31 ed 48 f7 c7 00 00 01 00 75 RSP: 002b:00007ffed460e1f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fdf6d312700 RCX: 000000000045a7f9 RDX: 00007fdf6d3129d0 RSI: 00007fdf6d311db0 RDI: 00000000003d0f00 RBP: 00007ffed460e400 R08: 00007fdf6d312700 R09: 00007fdf6d312700 R10: 00007fdf6d3129d0 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffed460e2af R14: 00007fdf6d3129c0 R15: 000000000073bfac memory: usage 307200kB, limit 307200kB, failcnt 116 memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: cache:248984KB rss:45564KB rss_huge:43008KB shmem:249032KB mapped_file:0KB dirty:132KB writeback:0KB swap:0KB inactive_anon:249124KB active_anon:45620KB inactive_file:4KB active_file:4KB unevictable:0KB oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz5,mems_allowed=0-1,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=11977,uid=0 Memory cgroup out of memory: Kill process 11977 (syz-executor.5) score 1113 or sacrifice child Killed process 11977 (syz-executor.5) total-vm:72580kB, anon-rss:2200kB, file-rss:35864kB, shmem-rss:0kB oom_reaper: reaped process 11977 (syz-executor.5), now anon-rss:0kB, file-rss:34904kB, shmem-rss:0kB syz-executor.5 invoked oom-killer: gfp_mask=0x7080c0(GFP_KERNEL_ACCOUNT|__GFP_ZERO), order=3, oom_score_adj=1000 CPU: 1 PID: 13354 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #75 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 dump_header+0x10f/0xb6c mm/oom_kill.c:451 oom_kill_process.cold+0x10/0x6f5 mm/oom_kill.c:966 out_of_memory mm/oom_kill.c:1141 [inline] out_of_memory+0x79a/0x1280 mm/oom_kill.c:1074 mem_cgroup_out_of_memory+0x99/0xe0 mm/memcontrol.c:1393 mem_cgroup_oom mm/memcontrol.c:1721 [inline] try_charge+0xfec/0x1570 mm/memcontrol.c:2283 memcg_kmem_charge_memcg+0x7c/0x130 mm/memcontrol.c:2591 memcg_kmem_charge+0x13b/0x340 mm/memcontrol.c:2624 __alloc_pages_nodemask+0x437/0x710 mm/page_alloc.c:4559 __alloc_pages include/linux/gfp.h:473 [inline] __alloc_pages_node include/linux/gfp.h:486 [inline] alloc_pages_node include/linux/gfp.h:500 [inline] alloc_thread_stack_node kernel/fork.c:246 [inline] dup_task_struct kernel/fork.c:849 [inline] copy_process.part.0+0x3e0/0x79a0 kernel/fork.c:1753 copy_process kernel/fork.c:1710 [inline] _do_fork+0x257/0xfe0 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 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:00007fdf6d311c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457e29 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 0000002100001ffc RBP: 000000000073bfa0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdf6d3126d4 R13: 00000000004be1da R14: 00000000004ce840 R15: 00000000ffffffff kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' memory: usage 307132kB, limit 307200kB, failcnt 136 memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: cache:251492KB rss:43392KB rss_huge:40960KB shmem:251540KB mapped_file:0KB dirty:132KB writeback:0KB swap:0KB inactive_anon:251648KB active_anon:43476KB inactive_file:4KB active_file:0KB unevictable:0KB oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz5,mems_allowed=0-1,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=12710,uid=0 Memory cgroup out of memory: Kill process 12710 (syz-executor.5) score 1113 or sacrifice child Killed process 12710 (syz-executor.5) total-vm:72580kB, anon-rss:2204kB, file-rss:35860kB, shmem-rss:0kB oom_reaper: reaped process 13347 (syz-executor.5), now anon-rss:0kB, file-rss:34908kB, shmem-rss:0kB kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' syz-executor.5 invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=1000 kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' CPU: 1 PID: 13393 Comm: syz-executor.5 Not tainted 5.0.0-rc6+ #75 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 dump_header+0x10f/0xb6c mm/oom_kill.c:451 oom_kill_process.cold+0x10/0x6f5 mm/oom_kill.c:966 out_of_memory mm/oom_kill.c:1141 [inline] out_of_memory+0x79a/0x1280 mm/oom_kill.c:1074 mem_cgroup_out_of_memory+0x99/0xe0 mm/memcontrol.c:1393 mem_cgroup_oom mm/memcontrol.c:1721 [inline] try_charge+0xfec/0x1570 mm/memcontrol.c:2283 mem_cgroup_try_charge+0x24d/0x5e0 mm/memcontrol.c:5913 mem_cgroup_try_charge_delay+0x1f/0xa0 mm/memcontrol.c:5928 shmem_getpage_gfp+0x69b/0x3520 mm/shmem.c:1790 shmem_getpage mm/shmem.c:134 [inline] shmem_write_begin+0x105/0x1e0 mm/shmem.c:2385 generic_perform_write+0x231/0x530 mm/filemap.c:3208 __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:1863 [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:00007fdf6d332c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457e29 RDX: 000000000d4b9afd RSI: 00000000200009c0 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdf6d3336d4 R13: 00000000004c7272 R14: 00000000004dcd78 R15: 00000000ffffffff memory: usage 306892kB, limit 307200kB, failcnt 160 kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' memory+swap: usage 0kB, limit 9007199254740988kB, failcnt 0 kmem: usage 0kB, limit 9007199254740988kB, failcnt 0 Memory cgroup stats for /syz5: cache:252328KB rss:43196KB rss_huge:40960KB shmem:252248KB mapped_file:0KB dirty:132KB writeback:0KB swap:0KB inactive_anon:252396KB active_anon:43364KB inactive_file:0KB active_file:8KB unevictable:0KB oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=syz5,mems_allowed=0-1,oom_memcg=/syz5,task_memcg=/syz5,task=syz-executor.5,pid=12990,uid=0 Memory cgroup out of memory: Kill process 12990 (syz-executor.5) score 1113 or sacrifice child Killed process 12990 (syz-executor.5) total-vm:72580kB, anon-rss:2204kB, file-rss:35860kB, shmem-rss:0kB kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' net_ratelimit: 16207 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:7a:d6:b4:11:49:ee, vlan:0) kobject: 'loop5' (00000000a91e0150): kobject_uevent_env bridge0: received packet on veth0_to_bridge with own address as source address (addr:7a:d6:b4:11:49:ee, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' bridge0: received packet on veth0_to_bridge with own address as source address (addr:7a:d6:b4:11:49:ee, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000a91e0150): kobject_uevent_env kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (0000000017d94078): kobject_uevent_env kobject: 'loop3' (0000000017d94078): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000a91e0150): kobject_uevent_env audit: type=1800 audit(1550429526.861:211): pid=13497 uid=0 auid=4294967295 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 op=collect_data cause=failed(directio) comm="syz-executor.1" name="file0" dev="sda1" ino=16547 res=0 kobject: 'loop5' (00000000a91e0150): fill_kobj_path: path = '/devices/virtual/block/loop5'