Title | Replies (including bot) | Last reply |
---|---|---|
[PATCH] block: Avoid accessing an already freed kobject in delete_partition | 5 (5) | 2021/07/06 06:28 |
[syzbot] KASAN: use-after-free Read in delete_partition (2) | 0 (1) | 2021/03/30 21:45 |
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Title | Replies (including bot) | Last reply |
---|---|---|
[PATCH] block: Avoid accessing an already freed kobject in delete_partition | 5 (5) | 2021/07/06 06:28 |
[syzbot] KASAN: use-after-free Read in delete_partition (2) | 0 (1) | 2021/03/30 21:45 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | KASAN: use-after-free Read in delete_partition block | C | done | done | 3 | 1460d | 1457d | 15/27 | fixed on 2020/11/16 12:12 |
Created | Duration | User | Patch | Repo | Result |
---|---|---|---|---|---|
2023/01/15 09:32 | 21m | retest repro | linux-next | error | |
2022/10/02 07:30 | 17m | retest repro | linux-next | error | |
2021/07/02 21:54 | 18m | rajatasthana4@gmail.com | patch | upstream | OK |
2021/06/29 22:58 | 19m | rajatasthana4@gmail.com | patch | upstream | OK |
2021/06/25 20:34 | 18m | rajatasthana4@gmail.com | upstream | report log | |
2021/06/25 20:29 | 18m | rajatasthana4@gmail.com | https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master | report log |
================================================================== BUG: KASAN: use-after-free in kobject_put+0x493/0x540 lib/kobject.c:749 Read of size 1 at addr ffff8880135d453c by task syz-executor372/8533 CPU: 0 PID: 8533 Comm: syz-executor372 Not tainted 5.12.0-rc4-next-20210326-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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:232 __kasan_report mm/kasan/report.c:399 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416 kobject_put+0x493/0x540 lib/kobject.c:749 delete_partition+0xa4/0x170 block/partitions/core.c:291 bdev_del_partition+0xf5/0x110 block/partitions/core.c:474 blkpg_do_ioctl+0x2e8/0x340 block/ioctl.c:33 blkpg_ioctl block/ioctl.c:60 [inline] blkdev_ioctl+0x577/0x6d0 block/ioctl.c:548 block_ioctl+0xf9/0x140 fs/block_dev.c:1667 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x444329 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdd8945e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000487072 RCX: 0000000000444329 RDX: 0000000020000240 RSI: 0000000000001269 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0023706f6f6c2f76 R09: 0000000000000001 R10: 000000000000001f R11: 0000000000000246 R12: 0000000000012734 R13: 00007ffdd8945e6c R14: 00007ffdd8945e80 R15: 00007ffdd8945e70 Allocated by task 8534: 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:556 [inline] kzalloc include/linux/slab.h:686 [inline] kobject_create lib/kobject.c:784 [inline] kobject_create_and_add+0x42/0xb0 lib/kobject.c:810 add_partition+0x56c/0x880 block/partitions/core.c:384 bdev_add_partition+0xb6/0x130 block/partitions/core.c:449 blkpg_do_ioctl+0x2d0/0x340 block/ioctl.c:43 blkpg_ioctl block/ioctl.c:60 [inline] blkdev_ioctl+0x577/0x6d0 block/ioctl.c:548 block_ioctl+0xf9/0x140 fs/block_dev.c:1667 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 8534: 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:1578 [inline] slab_free_freelist_hook+0xdf/0x240 mm/slub.c:1603 slab_free mm/slub.c:3163 [inline] kfree+0xe5/0x7f0 mm/slub.c:4230 kobject_cleanup lib/kobject.c:705 [inline] kobject_release lib/kobject.c:736 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c8/0x540 lib/kobject.c:753 delete_partition+0xa4/0x170 block/partitions/core.c:291 bdev_del_partition+0xf5/0x110 block/partitions/core.c:474 blkpg_do_ioctl+0x2e8/0x340 block/ioctl.c:33 blkpg_ioctl block/ioctl.c:60 [inline] blkdev_ioctl+0x577/0x6d0 block/ioctl.c:548 block_ioctl+0xf9/0x140 fs/block_dev.c:1667 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff8880135d4500 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 60 bytes inside of 64-byte region [ffff8880135d4500, ffff8880135d4540) The buggy address belongs to the page: page:ffffea00004d7500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x135d4 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 0000000100000001 ffff888010841640 raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880135d4400: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880135d4480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff8880135d4500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8880135d4580: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ffff8880135d4600: fa fb fb fb fb fb fb fb 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/03/30 04:55 | linux-next | 931294922e65 | 6a81331a | .config | console log | report | syz | C | ci-upstream-linux-next-kasan-gce-root | KASAN: use-after-free Read in delete_partition |