Title | Replies (including bot) | Last reply |
---|---|---|
[PATCH] mm: Check shrinker is memcg-aware in register_shrinker_prepared() | 1 (1) | 2018/08/20 13:28 |
KASAN: use-after-free Read in do_shrink_slab | 0 (1) | 2018/08/18 22:05 |
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Title | Replies (including bot) | Last reply |
---|---|---|
[PATCH] mm: Check shrinker is memcg-aware in register_shrinker_prepared() | 1 (1) | 2018/08/20 13:28 |
KASAN: use-after-free Read in do_shrink_slab | 0 (1) | 2018/08/18 22:05 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: use-after-free Read in do_shrink_slab (2) mm | 105 | 775d | 800d | 22/28 | fixed on 2023/02/24 13:50 |
================================================================== BUG: KASAN: use-after-free in do_shrink_slab+0xafb/0xba0 mm/vmscan.c:456 Read of size 8 at addr ffff8801b9465d18 by task syz-executor7/4522 CPU: 0 PID: 4522 Comm: syz-executor7 Not tainted 4.18.0+ #202 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+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 do_shrink_slab+0xafb/0xba0 mm/vmscan.c:456 shrink_slab_memcg mm/vmscan.c:600 [inline] shrink_slab+0x7b7/0x990 mm/vmscan.c:673 shrink_node+0x429/0x16a0 mm/vmscan.c:2734 shrink_zones mm/vmscan.c:2963 [inline] do_try_to_free_pages+0x3e7/0x1290 mm/vmscan.c:3025 try_to_free_mem_cgroup_pages+0x49d/0xb70 mm/vmscan.c:3323 reclaim_high.constprop.71+0x137/0x1e0 mm/memcontrol.c:2061 mem_cgroup_handle_over_high+0x8d/0x130 mm/memcontrol.c:2086 tracehook_notify_resume include/linux/tracehook.h:195 [inline] exit_to_usermode_loop+0x287/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a97 Code: 44 00 00 b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8a fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 bd 8a fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffca08e14d8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: fffffffffffffffe RBX: 0000000000000000 RCX: 0000000000459a97 RDX: 0000000000408440 RSI: 0000000000000002 RDI: 00007ffca08e1580 RBP: 00000000000011b0 R08: 0000000000000000 R09: 000000000000000d R10: 0000000000000006 R11: 0000000000000202 R12: 00007ffca08e25e0 R13: 00000000010c0940 R14: 0000000000000000 R15: badc0ffeebadface Allocated by task 24298: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x14e/0x720 mm/slab.c:3727 kmalloc_array include/linux/slab.h:635 [inline] kcalloc include/linux/slab.h:646 [inline] iter_file_splice_write+0x25d/0x1010 fs/splice.c:693 do_splice_from fs/splice.c:852 [inline] direct_splice_actor+0x128/0x190 fs/splice.c:1019 splice_direct_to_actor+0x318/0x8f0 fs/splice.c:974 do_splice_direct+0x2d4/0x420 fs/splice.c:1062 do_sendfile+0x62a/0xe20 fs/read_write.c:1440 __do_sys_sendfile64 fs/read_write.c:1495 [inline] __se_sys_sendfile64 fs/read_write.c:1487 [inline] __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1487 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 24298: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xd9/0x210 mm/slab.c:3813 iter_file_splice_write+0x78d/0x1010 fs/splice.c:777 do_splice_from fs/splice.c:852 [inline] direct_splice_actor+0x128/0x190 fs/splice.c:1019 splice_direct_to_actor+0x318/0x8f0 fs/splice.c:974 do_splice_direct+0x2d4/0x420 fs/splice.c:1062 do_sendfile+0x62a/0xe20 fs/read_write.c:1440 __do_sys_sendfile64 fs/read_write.c:1495 [inline] __se_sys_sendfile64 fs/read_write.c:1487 [inline] __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1487 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff8801b9465cc0 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 88 bytes inside of 256-byte region [ffff8801b9465cc0, ffff8801b9465dc0) The buggy address belongs to the page: page:ffffea0006e51940 count:1 mapcount:0 mapping:ffff8801dac007c0 index:0xffff8801b9465680 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea0006e43988 ffffea000680d248 ffff8801dac007c0 raw: ffff8801b9465680 ffff8801b9465040 0000000100000008 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801b9465c00: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc ffff8801b9465c80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb >ffff8801b9465d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801b9465d80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8801b9465e00: 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2018/08/22 12:04 | upstream | ad1d69735878 | 95b5c82b | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/21 22:51 | upstream | 0214f46b3a03 | 95b5c82b | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/21 09:38 | upstream | 778a33959a8a | 95b5c82b | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/20 20:30 | upstream | cc26ebbebde8 | 95b5c82b | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/20 20:16 | upstream | cc26ebbebde8 | 95b5c82b | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/19 22:40 | upstream | 2ad0d5269970 | 2dc4378f | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/19 09:34 | upstream | 08b5fa819970 | 2dc4378f | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/18 20:27 | upstream | a18d783fedfe | de20bcbb | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2018/08/18 02:59 | upstream | 1f7a4c73a739 | db1858f6 | .config | console log | report | ci-upstream-kasan-gce-root |