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================================================================== BUG: KASAN: slab-out-of-bounds in memcpy include/linux/fortify-string.h:191 [inline] BUG: KASAN: slab-out-of-bounds in page_to_skb+0x5cf/0xb70 drivers/net/virtio_net.c:480 Read of size 12 at addr ffff8880151e7800 by task systemd-udevd/6419 CPU: 0 PID: 6419 Comm: systemd-udevd Not tainted 5.12.0-rc8-next-20210420-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:436 check_region_inline mm/kasan/generic.c:180 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:186 memcpy+0x20/0x60 mm/kasan/shadow.c:65 memcpy include/linux/fortify-string.h:191 [inline] page_to_skb+0x5cf/0xb70 drivers/net/virtio_net.c:480 receive_mergeable drivers/net/virtio_net.c:1009 [inline] receive_buf+0x2bc0/0x6250 drivers/net/virtio_net.c:1119 virtnet_receive drivers/net/virtio_net.c:1411 [inline] virtnet_poll+0x568/0x10b0 drivers/net/virtio_net.c:1516 __napi_poll+0xaf/0x440 net/core/dev.c:6962 napi_poll net/core/dev.c:7029 [inline] net_rx_action+0x801/0xb40 net/core/dev.c:7116 __do_softirq+0x29b/0x9fe kernel/softirq.c:559 invoke_softirq kernel/softirq.c:433 [inline] __irq_exit_rcu+0x136/0x200 kernel/softirq.c:637 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649 common_interrupt+0xa4/0xd0 arch/x86/kernel/irq.c:240 </IRQ> asm_common_interrupt+0x1e/0x40 arch/x86/include/asm/idtentry.h:623 RIP: 0010:unwind_get_return_address arch/x86/kernel/unwind_orc.c:318 [inline] RIP: 0010:unwind_get_return_address+0x46/0x90 arch/x86/kernel/unwind_orc.c:313 Code: 74 04 3c 03 7e 51 8b 03 85 c0 75 05 5b 31 c0 5d c3 48 8d 6b 48 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <75> 32 48 8b 7b 48 e8 9f 45 19 00 85 c0 74 d3 48 b8 00 00 00 00 00 RSP: 0018:ffffc900056375a0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc900056375b8 RCX: 0000000000000000 RDX: 1ffff92000ac6ec0 RSI: ffffc90005637ef0 RDI: ffffc900056375b8 RBP: ffffc90005637600 R08: ffffffff8e4d45e0 R09: 0000000000000001 R10: fffff52000ac6ec2 R11: 0000000000084087 R12: ffffc90005637670 R13: 0000000000000000 R14: ffff888012fe1c80 R15: 0000000000000000 arch_stack_walk+0x93/0xe0 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357 ____kasan_slab_free mm/kasan/common.c:360 [inline] ____kasan_slab_free mm/kasan/common.c:325 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:212 [inline] slab_free_hook mm/slub.c:1593 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1618 slab_free mm/slub.c:3178 [inline] kfree+0xe5/0x7f0 mm/slub.c:4245 tomoyo_path2_perm+0x28a/0x6b0 security/tomoyo/file.c:946 tomoyo_path_rename+0xd2/0x130 security/tomoyo/tomoyo.c:279 security_path_rename+0x1b5/0x2e0 security/security.c:1189 do_renameat2+0x96f/0xcb0 fs/namei.c:4683 __do_sys_rename fs/namei.c:4745 [inline] __se_sys_rename fs/namei.c:4743 [inline] __x64_sys_rename+0x7d/0xa0 fs/namei.c:4743 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fd8527abd47 Code: 75 12 48 89 df e8 19 84 07 00 85 c0 0f 95 c0 0f b6 c0 f7 d8 5b c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 52 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 21 41 33 00 f7 d8 64 89 01 48 RSP: 002b:00007fff322cc928 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 000055f5105f8940 RCX: 00007fd8527abd47 RDX: 0000000000000000 RSI: 00007fff322cc930 RDI: 000055f5105fe560 RBP: 00007fff322cc9f0 R08: 000055f5105fbbb0 R09: 000055f5105fbad0 R10: 00007fd8539b08c0 R11: 0000000000000246 R12: 00007fff322cc930 R13: 0000000000000001 R14: 000055f50edfb6cb R15: 0000000000000000 Allocated by task 1: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] ____kasan_kmalloc mm/kasan/common.c:507 [inline] ____kasan_kmalloc mm/kasan/common.c:466 [inline] __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:516 kmalloc include/linux/slab.h:563 [inline] tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822 security_inode_getattr+0xcf/0x140 security/security.c:1332 vfs_getattr fs/stat.c:139 [inline] vfs_statx+0x164/0x390 fs/stat.c:207 vfs_fstatat fs/stat.c:225 [inline] vfs_lstat include/linux/fs.h:3384 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:380 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 1: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357 ____kasan_slab_free mm/kasan/common.c:360 [inline] ____kasan_slab_free mm/kasan/common.c:325 [inline] __kasan_slab_free+0xfb/0x130 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:212 [inline] slab_free_hook mm/slub.c:1593 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1618 slab_free mm/slub.c:3178 [inline] kfree+0xe5/0x7f0 mm/slub.c:4245 tomoyo_realpath_from_path+0x191/0x620 security/tomoyo/realpath.c:291 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822 security_inode_getattr+0xcf/0x140 security/security.c:1332 vfs_getattr fs/stat.c:139 [inline] vfs_statx+0x164/0x390 fs/stat.c:207 vfs_fstatat fs/stat.c:225 [inline] vfs_lstat include/linux/fs.h:3384 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:380 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff8880151e6000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2048 bytes to the right of 4096-byte region [ffff8880151e6000, ffff8880151e7000) The buggy address belongs to the page: page:ffffea0000547800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x151e0 head:ffffea0000547800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888011042140 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880151e7700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880151e7780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880151e7800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880151e7880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880151e7900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/04/21 08:15 | linux-next | 593ef1658ecf | 95777977 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | linux-next boot error: KASAN: slab-out-of-bounds Read in page_to_skb | ||||
2021/04/20 10:57 | linux-next | 593ef1658ecf | c0ced557 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | linux-next boot error: KASAN: slab-out-of-bounds Read in page_to_skb | ||||
2021/04/20 10:08 | linux-next | 593ef1658ecf | 4285c989 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | linux-next boot error: KASAN: slab-out-of-bounds Read in page_to_skb | ||||
2021/04/20 10:08 | linux-next | 593ef1658ecf | 4285c989 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | linux-next boot error: KASAN: slab-out-of-bounds Read in page_to_skb | ||||
2021/04/19 22:36 | linux-next | 50b8b1d699ac | 4285c989 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root | linux-next boot error: KASAN: slab-out-of-bounds Read in page_to_skb |