Bug 205705
| Summary: | Linux Kernel 5.3.10 - perf_trace_lock_acquire use-after-free | ||
|---|---|---|---|
| Product: | Process Management | Reporter: | Tristan Madani (tristmd) |
| Component: | Other | Assignee: | process_other |
| Status: | NEW --- | ||
| Severity: | normal | CC: | bp, dvyukov, jlayton, ryan.r.ware, tonyj |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 5.3.10 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
Do you have any of the reproducer info per https://github.com/google/syzkaller/blob/master/docs/reproducing_crashes.md This also happened on Android 5.4 kernel: https://syzkaller.appspot.com/bug?id=780a5854ef31fca357e4d176ae87446e44459523 And there is a C reproducer in that bug. I think this is likely fixed by these commits in mainline kernel: 6d390e4b5d48ec03bb87e63cf0a2bff5f4e116da dcf23ac3e846ca0cf626c155a0e3fcbbcf4fae8a Could you test those and let me know whether they fix the issue? |
LINUX KERNEL 5.3.10 - perf_trace_lock_acquire use-after-free 0x01 - Introduction === # Product: Linux Kernel # Version: 5.3.10 (and probably other versions) # Bug: UAF (Read) # Tested on: GNU/Linux Debian 9 x86_64 0x02 - Crash report === BUG: KASAN: use-after-free in perf_trace_lock_acquire+0x443/0x630 include/trace/events/lock.h:13 Read of size 8 at addr ffff88802245cc18 by task syz-executor.1/10285 CPU: 1 PID: 10285 Comm: syz-executor.1 Not tainted 5.3.10 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: // <--- call trace that reach it __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xca/0x13e lib/dump_stack.c:113 print_address_description+0x67/0x360 mm/kasan/report.c:351 __kasan_report.cold.7+0x1a/0x3b mm/kasan/report.c:482 kasan_report+0xe/0x12 mm/kasan/common.c:618 perf_trace_lock_acquire+0x443/0x630 include/trace/events/lock.h:13 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x234/0x330 kernel/locking/lockdep.c:4411 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x30/0x40 kernel/locking/spinlock.c:159 __wake_up_common_lock+0xa8/0x120 kernel/sched/wait.c:122 __locks_wake_up_blocks+0x18e/0x240 fs/locks.c:741 locks_delete_block+0x7f/0x240 fs/locks.c:772 flock_lock_inode_wait fs/locks.c:2081 [inline] locks_lock_inode_wait+0x14c/0x3b0 fs/locks.c:2100 locks_lock_file_wait include/linux/fs.h:1310 [inline] __do_sys_flock fs/locks.c:2163 [inline] __se_sys_flock fs/locks.c:2126 [inline] __x64_sys_flock+0x2fb/0x350 fs/locks.c:2126 do_syscall_64+0xbc/0x560 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b89 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5adacefc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000049 RAX: ffffffffffffffda RBX: 000000000051bfa8 RCX: 0000000000465b89 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000005 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004a6427 R13: 00000000004e4650 R14: 00000000004a6f99 R15: 00007f5adacf06bc Allocated by task 10290: // <--- where is it allocated save_stack+0x19/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_kmalloc mm/kasan/common.c:493 [inline] __kasan_kmalloc.constprop.7+0xc1/0xd0 mm/kasan/common.c:466 slab_post_alloc_hook mm/slab.h:520 [inline] slab_alloc_node mm/slub.c:2770 [inline] slab_alloc mm/slub.c:2778 [inline] kmem_cache_alloc+0xd9/0x2f0 mm/slub.c:2783 kmem_cache_zalloc include/linux/slab.h:738 [inline] locks_alloc_lock+0x18/0x1c0 fs/locks.c:345 flock_make_lock+0x245/0x2b0 fs/locks.c:486 __do_sys_flock fs/locks.c:2145 [inline] __se_sys_flock fs/locks.c:2126 [inline] __x64_sys_flock+0x122/0x350 fs/locks.c:2126 do_syscall_64+0xbc/0x560 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 10290: // <--- where it has been freed save_stack+0x19/0x80 mm/kasan/common.c:69 set_track mm/kasan/common.c:77 [inline] __kasan_slab_free+0x12e/0x180 mm/kasan/common.c:455 slab_free_hook mm/slub.c:1423 [inline] slab_free_freelist_hook+0x56/0x160 mm/slub.c:1474 slab_free mm/slub.c:3016 [inline] kmem_cache_free+0xa0/0x330 mm/slub.c:3032 locks_free_lock fs/locks.c:382 [inline] __do_sys_flock fs/locks.c:2166 [inline] __se_sys_flock fs/locks.c:2126 [inline] __x64_sys_flock+0x290/0x350 fs/locks.c:2126 do_syscall_64+0xbc/0x560 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff88802245cb88 which belongs to the cache file_lock_cache of size 264 // <--- the object's cache The buggy address is located 144 bytes inside of 264-byte region [ffff88802245cb88, ffff88802245cc90) The buggy address belongs to the page: page:ffffea0000891700 refcount:1 mapcount:0 mapping:ffff88802e50ca00 index:0x0 flags: 0x100000000000200(slab) raw: 0100000000000200 ffffea00008e4ec0 0000000300000003 ffff88802e50ca00 raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88802245cb00: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc ffff88802245cb80: fc fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802245cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802245cc80: fb fb fc fc fc fc fc fc fc fc fb fb fb fb fb fb ffff88802245cd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================