Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-4.14 | KASAN: use-after-free Read in fuse_copy_do | C | 1 | 625d | 728d | 0/1 | upstream: reported C repro on 2022/11/15 20:38 |
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================================================================== BUG: KASAN: use-after-free in memcpy include/linux/string.h:377 [inline] BUG: KASAN: use-after-free in fuse_copy_do+0x34a/0x430 fs/fuse/dev.c:817 Read of size 256 at addr ffff88809d072590 by task syz-executor416/8196 CPU: 0 PID: 8196 Comm: syz-executor416 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report+0x8f/0xa0 mm/kasan/report.c:412 memcpy+0x20/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:377 [inline] fuse_copy_do+0x34a/0x430 fs/fuse/dev.c:817 fuse_copy_one fs/fuse/dev.c:1053 [inline] fuse_copy_args+0x1fa/0x530 fs/fuse/dev.c:1071 fuse_dev_do_read+0x15ac/0x20e0 fs/fuse/dev.c:1327 fuse_dev_read+0x156/0x1f0 fs/fuse/dev.c:1393 call_read_iter include/linux/fs.h:1815 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x518/0x750 fs/read_write.c:418 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9b0a3b61d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9b0a3032f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f9b0a4474f0 RCX: 00007f9b0a3b61d9 RDX: 0000000000002020 RSI: 0000000020002140 RDI: 0000000000000003 RBP: 00007f9b0a41428c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9b0a40e168 R13: 00007f9b0a410280 R14: 00007f9b0a412288 R15: 00007f9b0a4474f8 Allocated by task 8160: __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] __d_alloc+0x636/0xa10 fs/dcache.c:1629 d_alloc+0x4a/0x230 fs/dcache.c:1696 d_alloc_parallel+0xeb/0x19e0 fs/dcache.c:2443 __lookup_slow+0x18d/0x4a0 fs/namei.c:1655 lookup_slow fs/namei.c:1689 [inline] walk_component+0x7ac/0xda0 fs/namei.c:1811 lookup_last fs/namei.c:2274 [inline] path_lookupat+0x1ff/0x8d0 fs/namei.c:2319 filename_lookup+0x1ac/0x5a0 fs/namei.c:2349 user_path include/linux/namei.h:62 [inline] do_mount+0x147/0x2f50 fs/namespace.c:2762 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 0: __cache_free mm/slab.c:3503 [inline] kfree+0xcc/0x210 mm/slab.c:3822 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2584 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2897 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2864 [inline] rcu_process_callbacks+0x8ff/0x18b0 kernel/rcu/tree.c:2881 __do_softirq+0x265/0x980 kernel/softirq.c:292 The buggy address belongs to the object at ffff88809d072580 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 16 bytes inside of 512-byte region [ffff88809d072580, ffff88809d072780) The buggy address belongs to the page: page:ffffea0002741c80 count:1 mapcount:0 mapping:ffff88813bff0940 index:0xffff88809d072a80 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea000275b7c8 ffffea000275b748 ffff88813bff0940 raw: ffff88809d072a80 ffff88809d072080 0000000100000004 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88809d072480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809d072500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88809d072580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88809d072600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88809d072680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2022/11/15 07:47 | linux-4.19.y | 3f8a27f9e27b | 97de9cfc | .config | console log | report | syz | C | [disk image] [vmlinux] | ci2-linux-4-19 | KASAN: use-after-free Read in fuse_copy_do |