Date
March 19, 2025, 10:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 34.620096] ================================================================== [ 34.620279] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 34.621414] Read of size 1 at addr fff00000c5d8b060 by task kunit_try_catch/194 [ 34.621689] [ 34.621857] CPU: 1 UID: 0 PID: 194 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT [ 34.622568] Tainted: [B]=BAD_PAGE, [N]=TEST [ 34.622677] Hardware name: linux,dummy-virt (DT) [ 34.622789] Call trace: [ 34.623133] show_stack+0x20/0x38 (C) [ 34.623799] dump_stack_lvl+0x8c/0xd0 [ 34.624020] print_report+0x118/0x5f0 [ 34.624408] kasan_report+0xc8/0x118 [ 34.624865] __kasan_check_byte+0x54/0x70 [ 34.625080] kfree_sensitive+0x30/0xb0 [ 34.625667] kmalloc_double_kzfree+0x168/0x308 [ 34.626072] kunit_try_run_case+0x14c/0x3d0 [ 34.626265] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.626434] kthread+0x318/0x618 [ 34.627354] ret_from_fork+0x10/0x20 [ 34.627524] [ 34.627713] Allocated by task 194: [ 34.628308] kasan_save_stack+0x3c/0x68 [ 34.628721] kasan_save_track+0x20/0x40 [ 34.629089] kasan_save_alloc_info+0x40/0x58 [ 34.629293] __kasan_kmalloc+0xd4/0xd8 [ 34.629786] __kmalloc_cache_noprof+0x15c/0x3c0 [ 34.629974] kmalloc_double_kzfree+0xb8/0x308 [ 34.630503] kunit_try_run_case+0x14c/0x3d0 [ 34.630804] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.631329] kthread+0x318/0x618 [ 34.631790] ret_from_fork+0x10/0x20 [ 34.632178] [ 34.632252] Freed by task 194: [ 34.632534] kasan_save_stack+0x3c/0x68 [ 34.632754] kasan_save_track+0x20/0x40 [ 34.632880] kasan_save_free_info+0x4c/0x78 [ 34.633006] __kasan_slab_free+0x6c/0x98 [ 34.633453] kfree+0x214/0x3c8 [ 34.633705] kfree_sensitive+0x80/0xb0 [ 34.633903] kmalloc_double_kzfree+0x11c/0x308 [ 34.634073] kunit_try_run_case+0x14c/0x3d0 [ 34.634373] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 34.634780] kthread+0x318/0x618 [ 34.634985] ret_from_fork+0x10/0x20 [ 34.635258] [ 34.635329] The buggy address belongs to the object at fff00000c5d8b060 [ 34.635329] which belongs to the cache kmalloc-16 of size 16 [ 34.635810] The buggy address is located 0 bytes inside of [ 34.635810] freed 16-byte region [fff00000c5d8b060, fff00000c5d8b070) [ 34.636188] [ 34.636367] The buggy address belongs to the physical page: [ 34.636485] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d8b [ 34.636813] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 34.637313] page_type: f5(slab) [ 34.637467] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 34.637624] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 34.637756] page dumped because: kasan: bad access detected [ 34.638004] [ 34.638221] Memory state around the buggy address: [ 34.638451] fff00000c5d8af00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.638629] fff00000c5d8af80: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc [ 34.639282] >fff00000c5d8b000: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 34.639573] ^ [ 34.639832] fff00000c5d8b080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.640010] fff00000c5d8b100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.640269] ==================================================================
[ 22.313899] ================================================================== [ 22.314911] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 22.315964] Read of size 1 at addr ffff8881025519a0 by task kunit_try_catch/213 [ 22.316787] [ 22.317070] CPU: 1 UID: 0 PID: 213 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 22.317289] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.317328] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.317455] Call Trace: [ 22.317492] <TASK> [ 22.317528] dump_stack_lvl+0x73/0xb0 [ 22.317606] print_report+0xd1/0x660 [ 22.317671] ? __virt_addr_valid+0x1db/0x2d0 [ 22.317793] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.317864] kasan_report+0x104/0x140 [ 22.318104] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.318207] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.318283] ? kmalloc_double_kzfree+0x19c/0x350 [ 22.318349] __kasan_check_byte+0x3d/0x50 [ 22.318415] kfree_sensitive+0x22/0x90 [ 22.318485] kmalloc_double_kzfree+0x19c/0x350 [ 22.318552] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 22.318609] ? __schedule+0xd46/0x29c0 [ 22.318658] ? __pfx_read_tsc+0x10/0x10 [ 22.318707] ? ktime_get_ts64+0x86/0x240 [ 22.318972] kunit_try_run_case+0x1b2/0x490 [ 22.319103] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.319206] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.319289] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.319372] ? __kthread_parkme+0x82/0x160 [ 22.319452] ? preempt_count_sub+0x50/0x80 [ 22.319739] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.319810] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.319900] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.319972] kthread+0x323/0x710 [ 22.320032] ? trace_preempt_on+0x20/0xc0 [ 22.320092] ? __pfx_kthread+0x10/0x10 [ 22.320199] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.320257] ? calculate_sigpending+0x7b/0xa0 [ 22.320310] ? __pfx_kthread+0x10/0x10 [ 22.320369] ret_from_fork+0x41/0x80 [ 22.320430] ? __pfx_kthread+0x10/0x10 [ 22.320490] ret_from_fork_asm+0x1a/0x30 [ 22.320579] </TASK> [ 22.320608] [ 22.342146] Allocated by task 213: [ 22.342612] kasan_save_stack+0x3d/0x60 [ 22.343348] kasan_save_track+0x18/0x40 [ 22.344082] kasan_save_alloc_info+0x3b/0x50 [ 22.344878] __kasan_kmalloc+0xb7/0xc0 [ 22.345486] __kmalloc_cache_noprof+0x183/0x410 [ 22.346501] kmalloc_double_kzfree+0xa9/0x350 [ 22.347272] kunit_try_run_case+0x1b2/0x490 [ 22.348018] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.348920] kthread+0x323/0x710 [ 22.349408] ret_from_fork+0x41/0x80 [ 22.350078] ret_from_fork_asm+0x1a/0x30 [ 22.350667] [ 22.351456] Freed by task 213: [ 22.351672] kasan_save_stack+0x3d/0x60 [ 22.352396] kasan_save_track+0x18/0x40 [ 22.352575] kasan_save_free_info+0x3f/0x60 [ 22.352796] __kasan_slab_free+0x56/0x70 [ 22.353387] kfree+0x222/0x3f0 [ 22.353758] kfree_sensitive+0x67/0x90 [ 22.354200] kmalloc_double_kzfree+0x12b/0x350 [ 22.354671] kunit_try_run_case+0x1b2/0x490 [ 22.355540] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.356477] kthread+0x323/0x710 [ 22.356758] ret_from_fork+0x41/0x80 [ 22.357172] ret_from_fork_asm+0x1a/0x30 [ 22.358013] [ 22.358287] The buggy address belongs to the object at ffff8881025519a0 [ 22.358287] which belongs to the cache kmalloc-16 of size 16 [ 22.360181] The buggy address is located 0 bytes inside of [ 22.360181] freed 16-byte region [ffff8881025519a0, ffff8881025519b0) [ 22.361631] [ 22.362158] The buggy address belongs to the physical page: [ 22.362601] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102551 [ 22.363571] flags: 0x200000000000000(node=0|zone=2) [ 22.364703] page_type: f5(slab) [ 22.365265] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 22.366155] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 22.366849] page dumped because: kasan: bad access detected [ 22.367504] [ 22.367967] Memory state around the buggy address: [ 22.368381] ffff888102551880: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.368893] ffff888102551900: 00 05 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 22.369537] >ffff888102551980: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 22.370093] ^ [ 22.371095] ffff888102551a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.372011] ffff888102551a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.372659] ==================================================================