Date
July 9, 2025, 12:11 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.868336] ================================================================== [ 19.868411] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x168/0x308 [ 19.868469] Read of size 1 at addr fff00000c63901a0 by task kunit_try_catch/193 [ 19.868519] [ 19.868552] CPU: 1 UID: 0 PID: 193 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.868637] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.868664] Hardware name: linux,dummy-virt (DT) [ 19.868695] Call trace: [ 19.868716] show_stack+0x20/0x38 (C) [ 19.868767] dump_stack_lvl+0x8c/0xd0 [ 19.868814] print_report+0x118/0x608 [ 19.868928] kasan_report+0xdc/0x128 [ 19.868989] __kasan_check_byte+0x54/0x70 [ 19.869036] kfree_sensitive+0x30/0xb0 [ 19.869097] kmalloc_double_kzfree+0x168/0x308 [ 19.869145] kunit_try_run_case+0x170/0x3f0 [ 19.869195] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.869248] kthread+0x328/0x630 [ 19.869290] ret_from_fork+0x10/0x20 [ 19.869340] [ 19.869359] Allocated by task 193: [ 19.869388] kasan_save_stack+0x3c/0x68 [ 19.870143] kasan_save_track+0x20/0x40 [ 19.870525] kasan_save_alloc_info+0x40/0x58 [ 19.870624] __kasan_kmalloc+0xd4/0xd8 [ 19.870755] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.870824] kmalloc_double_kzfree+0xb8/0x308 [ 19.870949] kunit_try_run_case+0x170/0x3f0 [ 19.871002] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.871065] kthread+0x328/0x630 [ 19.871599] ret_from_fork+0x10/0x20 [ 19.871851] [ 19.871914] Freed by task 193: [ 19.872066] kasan_save_stack+0x3c/0x68 [ 19.872128] kasan_save_track+0x20/0x40 [ 19.872241] kasan_save_free_info+0x4c/0x78 [ 19.872311] __kasan_slab_free+0x6c/0x98 [ 19.872412] kfree+0x214/0x3c8 [ 19.872590] kfree_sensitive+0x80/0xb0 [ 19.872871] kmalloc_double_kzfree+0x11c/0x308 [ 19.873012] kunit_try_run_case+0x170/0x3f0 [ 19.873097] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.873176] kthread+0x328/0x630 [ 19.873282] ret_from_fork+0x10/0x20 [ 19.873372] [ 19.873490] The buggy address belongs to the object at fff00000c63901a0 [ 19.873490] which belongs to the cache kmalloc-16 of size 16 [ 19.873587] The buggy address is located 0 bytes inside of [ 19.873587] freed 16-byte region [fff00000c63901a0, fff00000c63901b0) [ 19.873924] [ 19.874007] The buggy address belongs to the physical page: [ 19.874108] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106390 [ 19.874214] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.874371] page_type: f5(slab) [ 19.874440] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 19.874562] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 19.874607] page dumped because: kasan: bad access detected [ 19.874639] [ 19.874922] Memory state around the buggy address: [ 19.875005] fff00000c6390080: fa fb fc fc fa fb fc fc 00 04 fc fc fa fb fc fc [ 19.875164] fff00000c6390100: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.875234] >fff00000c6390180: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 19.875292] ^ [ 19.875423] fff00000c6390200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.875491] fff00000c6390280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.875547] ==================================================================
[ 12.988264] ================================================================== [ 12.988833] BUG: KASAN: slab-use-after-free in kmalloc_double_kzfree+0x19c/0x350 [ 12.989401] Read of size 1 at addr ffff888101e0ed00 by task kunit_try_catch/209 [ 12.989681] [ 12.989800] CPU: 1 UID: 0 PID: 209 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 12.989847] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.989858] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.989879] Call Trace: [ 12.989891] <TASK> [ 12.989908] dump_stack_lvl+0x73/0xb0 [ 12.989954] print_report+0xd1/0x650 [ 12.989977] ? __virt_addr_valid+0x1db/0x2d0 [ 12.989999] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.990022] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.990316] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.990340] kasan_report+0x141/0x180 [ 12.990361] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.990387] ? kmalloc_double_kzfree+0x19c/0x350 [ 12.990409] __kasan_check_byte+0x3d/0x50 [ 12.990431] kfree_sensitive+0x22/0x90 [ 12.990454] kmalloc_double_kzfree+0x19c/0x350 [ 12.990476] ? __pfx_kmalloc_double_kzfree+0x10/0x10 [ 12.990499] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 12.990525] ? trace_hardirqs_on+0x37/0xe0 [ 12.990548] ? __pfx_read_tsc+0x10/0x10 [ 12.990569] ? ktime_get_ts64+0x86/0x230 [ 12.990594] kunit_try_run_case+0x1a5/0x480 [ 12.990619] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.990643] ? queued_spin_lock_slowpath+0x116/0xb40 [ 12.990668] ? __kthread_parkme+0x82/0x180 [ 12.990689] ? preempt_count_sub+0x50/0x80 [ 12.990720] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.990743] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.990767] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.990792] kthread+0x337/0x6f0 [ 12.990810] ? trace_preempt_on+0x20/0xc0 [ 12.990831] ? __pfx_kthread+0x10/0x10 [ 12.990851] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.990872] ? calculate_sigpending+0x7b/0xa0 [ 12.990896] ? __pfx_kthread+0x10/0x10 [ 12.990916] ret_from_fork+0x116/0x1d0 [ 12.991007] ? __pfx_kthread+0x10/0x10 [ 12.991031] ret_from_fork_asm+0x1a/0x30 [ 12.991062] </TASK> [ 12.991073] [ 13.001672] Allocated by task 209: [ 13.001833] kasan_save_stack+0x45/0x70 [ 13.002364] kasan_save_track+0x18/0x40 [ 13.002558] kasan_save_alloc_info+0x3b/0x50 [ 13.002758] __kasan_kmalloc+0xb7/0xc0 [ 13.002923] __kmalloc_cache_noprof+0x189/0x420 [ 13.003454] kmalloc_double_kzfree+0xa9/0x350 [ 13.003626] kunit_try_run_case+0x1a5/0x480 [ 13.003837] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.004466] kthread+0x337/0x6f0 [ 13.004670] ret_from_fork+0x116/0x1d0 [ 13.004820] ret_from_fork_asm+0x1a/0x30 [ 13.005134] [ 13.005238] Freed by task 209: [ 13.005575] kasan_save_stack+0x45/0x70 [ 13.005755] kasan_save_track+0x18/0x40 [ 13.005949] kasan_save_free_info+0x3f/0x60 [ 13.006514] __kasan_slab_free+0x56/0x70 [ 13.006695] kfree+0x222/0x3f0 [ 13.007108] kfree_sensitive+0x67/0x90 [ 13.007272] kmalloc_double_kzfree+0x12b/0x350 [ 13.007497] kunit_try_run_case+0x1a5/0x480 [ 13.007699] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.007938] kthread+0x337/0x6f0 [ 13.008522] ret_from_fork+0x116/0x1d0 [ 13.008670] ret_from_fork_asm+0x1a/0x30 [ 13.009112] [ 13.009309] The buggy address belongs to the object at ffff888101e0ed00 [ 13.009309] which belongs to the cache kmalloc-16 of size 16 [ 13.009939] The buggy address is located 0 bytes inside of [ 13.009939] freed 16-byte region [ffff888101e0ed00, ffff888101e0ed10) [ 13.010718] [ 13.010802] The buggy address belongs to the physical page: [ 13.011323] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101e0e [ 13.011646] flags: 0x200000000000000(node=0|zone=2) [ 13.011863] page_type: f5(slab) [ 13.012367] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 13.012646] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 13.013310] page dumped because: kasan: bad access detected [ 13.013516] [ 13.013614] Memory state around the buggy address: [ 13.013844] ffff888101e0ec00: 00 04 fc fc 00 04 fc fc 00 05 fc fc fa fb fc fc [ 13.014477] ffff888101e0ec80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 13.014794] >ffff888101e0ed00: fa fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.015313] ^ [ 13.015481] ffff888101e0ed80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.015860] ffff888101e0ee00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.016527] ==================================================================