syz-executor.3: page allocation failure: order:5, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null) syz-executor.4: page allocation failure: order:5, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null) page allocation failure: order:5, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null) syz-executor.4: page allocation failure: order:5, mode:0x14040c0(GFP_KERNEL|__GFP_COMP), nodemask=(null) ================================================================== BUG: KASAN: use-after-free in ceph_destroy_options+0xe9/0x110 net/ceph/ceph_common.c:283 Read of size 8 at addr ffff888087aaf290 by task syz-executor.1/10204 CPU: 1 PID: 10204 Comm: syz-executor.1 Not tainted 4.14.114 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xaf/0x2b5 mm/kasan/report.c:393 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430 ceph_destroy_options+0xe9/0x110 net/ceph/ceph_common.c:283 ceph_mount+0xb6d/0x1709 fs/ceph/super.c:1002 mount_fs+0x9d/0x2a7 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x458da9 RSP: 002b:00007f6977eedc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000020000100 RSI: 0000000020000200 RDI: 0000000020000040 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6977eee6d4 R13: 00000000004c4da1 R14: 00000000004d8a08 R15: 00000000ffffffff Allocated by task 10204: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 kmem_cache_alloc_trace+0x152/0x790 mm/slab.c:3618 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] ceph_parse_options+0xb8/0xe90 net/ceph/ceph_common.c:349 parse_mount_options fs/ceph/super.c:466 [inline] ceph_mount+0x3c1/0x1709 fs/ceph/super.c:991 mount_fs+0x9d/0x2a7 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 10204: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 ceph_destroy_options+0xdc/0x110 net/ceph/ceph_common.c:289 ceph_destroy_client+0x9d/0xc0 net/ceph/ceph_common.c:671 create_fs_client fs/ceph/super.c:649 [inline] ceph_mount+0xb46/0x1709 fs/ceph/super.c:998 mount_fs+0x9d/0x2a7 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 The buggy address belongs to the object at ffff888087aaf1c0 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 208 bytes inside of 256-byte region [ffff888087aaf1c0, ffff888087aaf2c0) The buggy address belongs to the page: page:ffffea00021eabc0 count:1 mapcount:0 mapping:ffff888087aaf080 index:0x0 flags: 0x1fffc0000000100(slab) raw: 01fffc0000000100 ffff888087aaf080 0000000000000000 000000010000000c raw: ffffea00024c4260 ffffea0001488460 ffff8880aa8007c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888087aaf180: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff888087aaf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888087aaf280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff888087aaf300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888087aaf380: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ================================================================== ================================================================== BUG: KASAN: double-free or invalid-free in ceph_destroy_options+0xd4/0x110 net/ceph/ceph_common.c:288 CPU: 0 PID: 9986 Comm: syz-executor.0 Tainted: G B 4.14.114 #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_double_free+0x56/0x80 mm/kasan/report.c:333 kasan_slab_free+0xa7/0xc0 mm/kasan/kasan.c:514 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 ceph_destroy_options+0xd4/0x110 net/ceph/ceph_common.c:288 ceph_mount+0xb6d/0x1709 fs/ceph/super.c:1002 mount_fs+0x9d/0x2a7 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x458da9 RSP: 002b:00007f3ae1dcfc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 0000000020000100 RSI: 0000000020000200 RDI: 0000000020000040 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3ae1dd06d4 R13: 00000000004c4da1 R14: 00000000004d8a08 R15: 00000000ffffffff Allocated by task 9986: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 kmem_cache_alloc_trace+0x152/0x790 mm/slab.c:3618 kmalloc include/linux/slab.h:488 [inline] kmalloc_array include/linux/slab.h:606 [inline] kcalloc include/linux/slab.h:618 [inline] ceph_parse_options+0xfe/0xe90 net/ceph/ceph_common.c:352 parse_mount_options fs/ceph/super.c:466 [inline] ceph_mount+0x3c1/0x1709 fs/ceph/super.c:991 mount_fs+0x9d/0x2a7 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 9986: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 ceph_destroy_options+0xd4/0x110 net/ceph/ceph_common.c:288 ceph_destroy_client+0x9d/0xc0 net/ceph/ceph_common.c:671 create_fs_client fs/ceph/super.c:649 [inline] ceph_mount+0xb46/0x1709 fs/ceph/super.c:998 mount_fs+0x9d/0x2a7 fs/super.c:1237 vfs_kern_mount.part.0+0x5e/0x3d0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x417/0x27d0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xab/0x120 fs/namespace.c:3072 do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 The buggy address belongs to the object at ffff8881cdf40e00 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 0 bytes inside of 8192-byte region [ffff8881cdf40e00, ffff8881cdf42e00) The buggy address belongs to the page: page:ffffea000737d000 count:1 mapcount:0 mapping:ffff8881cdf40e00 index:0x0 compound_mapcount: 0 flags: 0x6fffc0000008100(slab|head) raw: 06fffc0000008100 ffff8881cdf40e00 0000000000000000 0000000100000001 raw: ffffea0007669120 ffffea00071f5220 ffff8880aa802080 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881cdf40d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881cdf40d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8881cdf40e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881cdf40e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881cdf40f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================