Date
July 2, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.255598] ================================================================== [ 18.255662] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 18.256053] Read of size 1 at addr fff00000c3f3ec68 by task kunit_try_catch/184 [ 18.256133] [ 18.256168] CPU: 0 UID: 0 PID: 184 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.256676] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.256795] Hardware name: linux,dummy-virt (DT) [ 18.257039] Call trace: [ 18.257105] show_stack+0x20/0x38 (C) [ 18.257277] dump_stack_lvl+0x8c/0xd0 [ 18.257366] print_report+0x118/0x608 [ 18.257423] kasan_report+0xdc/0x128 [ 18.257467] __asan_report_load1_noabort+0x20/0x30 [ 18.257520] kmalloc_uaf+0x300/0x338 [ 18.257563] kunit_try_run_case+0x170/0x3f0 [ 18.257874] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.258500] kthread+0x328/0x630 [ 18.258627] ret_from_fork+0x10/0x20 [ 18.258953] [ 18.259021] Allocated by task 184: [ 18.259085] kasan_save_stack+0x3c/0x68 [ 18.259725] kasan_save_track+0x20/0x40 [ 18.260006] kasan_save_alloc_info+0x40/0x58 [ 18.260117] __kasan_kmalloc+0xd4/0xd8 [ 18.260303] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.260417] kmalloc_uaf+0xb8/0x338 [ 18.260455] kunit_try_run_case+0x170/0x3f0 [ 18.260537] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.260829] kthread+0x328/0x630 [ 18.261041] ret_from_fork+0x10/0x20 [ 18.261103] [ 18.261157] Freed by task 184: [ 18.261301] kasan_save_stack+0x3c/0x68 [ 18.261392] kasan_save_track+0x20/0x40 [ 18.261540] kasan_save_free_info+0x4c/0x78 [ 18.261673] __kasan_slab_free+0x6c/0x98 [ 18.261808] kfree+0x214/0x3c8 [ 18.261876] kmalloc_uaf+0x11c/0x338 [ 18.261964] kunit_try_run_case+0x170/0x3f0 [ 18.262186] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.262274] kthread+0x328/0x630 [ 18.262509] ret_from_fork+0x10/0x20 [ 18.262647] [ 18.262671] The buggy address belongs to the object at fff00000c3f3ec60 [ 18.262671] which belongs to the cache kmalloc-16 of size 16 [ 18.263021] The buggy address is located 8 bytes inside of [ 18.263021] freed 16-byte region [fff00000c3f3ec60, fff00000c3f3ec70) [ 18.263219] [ 18.263264] The buggy address belongs to the physical page: [ 18.263421] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103f3e [ 18.263925] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.264173] page_type: f5(slab) [ 18.264225] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 18.264672] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 18.264727] page dumped because: kasan: bad access detected [ 18.264760] [ 18.264800] Memory state around the buggy address: [ 18.265090] fff00000c3f3eb00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.265284] fff00000c3f3eb80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.265349] >fff00000c3f3ec00: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 18.265519] ^ [ 18.265726] fff00000c3f3ec80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.265838] fff00000c3f3ed00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.266023] ==================================================================
[ 11.632480] ================================================================== [ 11.633238] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 11.633537] Read of size 1 at addr ffff888101c19f28 by task kunit_try_catch/203 [ 11.634260] [ 11.634480] CPU: 0 UID: 0 PID: 203 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 11.634633] Tainted: [B]=BAD_PAGE, [N]=TEST [ 11.634649] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 11.634672] Call Trace: [ 11.634687] <TASK> [ 11.634707] dump_stack_lvl+0x73/0xb0 [ 11.634777] print_report+0xd1/0x650 [ 11.634803] ? __virt_addr_valid+0x1db/0x2d0 [ 11.634827] ? kmalloc_uaf+0x320/0x380 [ 11.634846] ? kasan_complete_mode_report_info+0x64/0x200 [ 11.634867] ? kmalloc_uaf+0x320/0x380 [ 11.634886] kasan_report+0x141/0x180 [ 11.634908] ? kmalloc_uaf+0x320/0x380 [ 11.634931] __asan_report_load1_noabort+0x18/0x20 [ 11.634954] kmalloc_uaf+0x320/0x380 [ 11.634973] ? __pfx_kmalloc_uaf+0x10/0x10 [ 11.634993] ? __schedule+0x10cc/0x2b60 [ 11.635014] ? __pfx_read_tsc+0x10/0x10 [ 11.635035] ? ktime_get_ts64+0x86/0x230 [ 11.635060] kunit_try_run_case+0x1a5/0x480 [ 11.635085] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.635106] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 11.635128] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 11.635149] ? __kthread_parkme+0x82/0x180 [ 11.635169] ? preempt_count_sub+0x50/0x80 [ 11.635193] ? __pfx_kunit_try_run_case+0x10/0x10 [ 11.635215] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.635236] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 11.635258] kthread+0x337/0x6f0 [ 11.635277] ? trace_preempt_on+0x20/0xc0 [ 11.635300] ? __pfx_kthread+0x10/0x10 [ 11.635320] ? _raw_spin_unlock_irq+0x47/0x80 [ 11.635339] ? calculate_sigpending+0x7b/0xa0 [ 11.635363] ? __pfx_kthread+0x10/0x10 [ 11.635394] ret_from_fork+0x116/0x1d0 [ 11.635411] ? __pfx_kthread+0x10/0x10 [ 11.635430] ret_from_fork_asm+0x1a/0x30 [ 11.635461] </TASK> [ 11.635473] [ 11.647022] Allocated by task 203: [ 11.647200] kasan_save_stack+0x45/0x70 [ 11.647398] kasan_save_track+0x18/0x40 [ 11.648057] kasan_save_alloc_info+0x3b/0x50 [ 11.648267] __kasan_kmalloc+0xb7/0xc0 [ 11.648441] __kmalloc_cache_noprof+0x189/0x420 [ 11.648796] kmalloc_uaf+0xaa/0x380 [ 11.648970] kunit_try_run_case+0x1a5/0x480 [ 11.649159] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.649394] kthread+0x337/0x6f0 [ 11.649548] ret_from_fork+0x116/0x1d0 [ 11.650142] ret_from_fork_asm+0x1a/0x30 [ 11.650482] [ 11.650699] Freed by task 203: [ 11.651089] kasan_save_stack+0x45/0x70 [ 11.651411] kasan_save_track+0x18/0x40 [ 11.651655] kasan_save_free_info+0x3f/0x60 [ 11.652166] __kasan_slab_free+0x56/0x70 [ 11.652356] kfree+0x222/0x3f0 [ 11.652518] kmalloc_uaf+0x12c/0x380 [ 11.653216] kunit_try_run_case+0x1a5/0x480 [ 11.653426] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 11.653861] kthread+0x337/0x6f0 [ 11.654018] ret_from_fork+0x116/0x1d0 [ 11.654174] ret_from_fork_asm+0x1a/0x30 [ 11.654349] [ 11.654450] The buggy address belongs to the object at ffff888101c19f20 [ 11.654450] which belongs to the cache kmalloc-16 of size 16 [ 11.655198] The buggy address is located 8 bytes inside of [ 11.655198] freed 16-byte region [ffff888101c19f20, ffff888101c19f30) [ 11.655897] [ 11.655999] The buggy address belongs to the physical page: [ 11.656235] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101c19 [ 11.656931] flags: 0x200000000000000(node=0|zone=2) [ 11.657192] page_type: f5(slab) [ 11.657559] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 11.658203] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 11.659074] page dumped because: kasan: bad access detected [ 11.659519] [ 11.659607] Memory state around the buggy address: [ 11.660118] ffff888101c19e00: 00 02 fc fc 00 06 fc fc 00 06 fc fc fa fb fc fc [ 11.660439] ffff888101c19e80: fa fb fc fc 00 05 fc fc fa fb fc fc fa fb fc fc [ 11.661035] >ffff888101c19f00: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 11.661363] ^ [ 11.661803] ffff888101c19f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.662105] ffff888101c1a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.662404] ==================================================================