Date
July 19, 2025, 11:12 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.187825] ================================================================== [ 15.187888] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x3bc/0x438 [ 15.188077] Read of size 16 at addr fff00000c5eb7c20 by task kunit_try_catch/168 [ 15.188137] [ 15.188220] CPU: 1 UID: 0 PID: 168 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.188299] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.188325] Hardware name: linux,dummy-virt (DT) [ 15.188384] Call trace: [ 15.188419] show_stack+0x20/0x38 (C) [ 15.188504] dump_stack_lvl+0x8c/0xd0 [ 15.188552] print_report+0x118/0x5d0 [ 15.188597] kasan_report+0xdc/0x128 [ 15.188651] __asan_report_load16_noabort+0x20/0x30 [ 15.188822] kmalloc_uaf_16+0x3bc/0x438 [ 15.188908] kunit_try_run_case+0x170/0x3f0 [ 15.189072] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.189124] kthread+0x328/0x630 [ 15.189220] ret_from_fork+0x10/0x20 [ 15.189267] [ 15.189285] Allocated by task 168: [ 15.189314] kasan_save_stack+0x3c/0x68 [ 15.189478] kasan_save_track+0x20/0x40 [ 15.189561] kasan_save_alloc_info+0x40/0x58 [ 15.189634] __kasan_kmalloc+0xd4/0xd8 [ 15.189743] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.189780] kmalloc_uaf_16+0x140/0x438 [ 15.189853] kunit_try_run_case+0x170/0x3f0 [ 15.189955] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.189997] kthread+0x328/0x630 [ 15.190156] ret_from_fork+0x10/0x20 [ 15.190244] [ 15.190311] Freed by task 168: [ 15.190381] kasan_save_stack+0x3c/0x68 [ 15.190417] kasan_save_track+0x20/0x40 [ 15.190492] kasan_save_free_info+0x4c/0x78 [ 15.190595] __kasan_slab_free+0x6c/0x98 [ 15.190664] kfree+0x214/0x3c8 [ 15.190750] kmalloc_uaf_16+0x190/0x438 [ 15.190876] kunit_try_run_case+0x170/0x3f0 [ 15.190972] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.191047] kthread+0x328/0x630 [ 15.191078] ret_from_fork+0x10/0x20 [ 15.191111] [ 15.191130] The buggy address belongs to the object at fff00000c5eb7c20 [ 15.191130] which belongs to the cache kmalloc-16 of size 16 [ 15.191185] The buggy address is located 0 bytes inside of [ 15.191185] freed 16-byte region [fff00000c5eb7c20, fff00000c5eb7c30) [ 15.191242] [ 15.191312] The buggy address belongs to the physical page: [ 15.191454] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105eb7 [ 15.191692] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.191740] page_type: f5(slab) [ 15.191778] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.191826] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.191866] page dumped because: kasan: bad access detected [ 15.191895] [ 15.191912] Memory state around the buggy address: [ 15.191941] fff00000c5eb7b00: fa fb fc fc 00 01 fc fc 00 01 fc fc fa fb fc fc [ 15.192105] fff00000c5eb7b80: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.192148] >fff00000c5eb7c00: 00 00 fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 15.192197] ^ [ 15.192261] fff00000c5eb7c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.192314] fff00000c5eb7d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.193145] ==================================================================
[ 12.039102] ================================================================== [ 12.039506] BUG: KASAN: slab-use-after-free in kmalloc_uaf_16+0x47b/0x4c0 [ 12.039729] Read of size 16 at addr ffff888101ccd2c0 by task kunit_try_catch/185 [ 12.039953] [ 12.040050] CPU: 0 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.040091] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.040102] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.040121] Call Trace: [ 12.040132] <TASK> [ 12.040146] dump_stack_lvl+0x73/0xb0 [ 12.040172] print_report+0xd1/0x610 [ 12.040193] ? __virt_addr_valid+0x1db/0x2d0 [ 12.040214] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.040232] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.040252] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.040272] kasan_report+0x141/0x180 [ 12.040292] ? kmalloc_uaf_16+0x47b/0x4c0 [ 12.040315] __asan_report_load16_noabort+0x18/0x20 [ 12.040338] kmalloc_uaf_16+0x47b/0x4c0 [ 12.040357] ? __pfx_kmalloc_uaf_16+0x10/0x10 [ 12.040377] ? __schedule+0x10cc/0x2b60 [ 12.040399] ? __pfx_read_tsc+0x10/0x10 [ 12.040418] ? ktime_get_ts64+0x86/0x230 [ 12.040441] kunit_try_run_case+0x1a5/0x480 [ 12.040463] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.040484] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.040506] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.040527] ? __kthread_parkme+0x82/0x180 [ 12.040546] ? preempt_count_sub+0x50/0x80 [ 12.040568] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.040590] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.040612] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.040633] kthread+0x337/0x6f0 [ 12.040651] ? trace_preempt_on+0x20/0xc0 [ 12.040672] ? __pfx_kthread+0x10/0x10 [ 12.040691] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.040710] ? calculate_sigpending+0x7b/0xa0 [ 12.040734] ? __pfx_kthread+0x10/0x10 [ 12.040754] ret_from_fork+0x116/0x1d0 [ 12.040770] ? __pfx_kthread+0x10/0x10 [ 12.040789] ret_from_fork_asm+0x1a/0x30 [ 12.040818] </TASK> [ 12.040828] [ 12.053950] Allocated by task 185: [ 12.054138] kasan_save_stack+0x45/0x70 [ 12.054559] kasan_save_track+0x18/0x40 [ 12.054948] kasan_save_alloc_info+0x3b/0x50 [ 12.055293] __kasan_kmalloc+0xb7/0xc0 [ 12.055656] __kmalloc_cache_noprof+0x189/0x420 [ 12.055956] kmalloc_uaf_16+0x15b/0x4c0 [ 12.056155] kunit_try_run_case+0x1a5/0x480 [ 12.056348] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.056950] kthread+0x337/0x6f0 [ 12.057296] ret_from_fork+0x116/0x1d0 [ 12.057591] ret_from_fork_asm+0x1a/0x30 [ 12.057749] [ 12.057847] Freed by task 185: [ 12.058025] kasan_save_stack+0x45/0x70 [ 12.058216] kasan_save_track+0x18/0x40 [ 12.058374] kasan_save_free_info+0x3f/0x60 [ 12.059074] __kasan_slab_free+0x56/0x70 [ 12.059271] kfree+0x222/0x3f0 [ 12.059752] kmalloc_uaf_16+0x1d6/0x4c0 [ 12.059951] kunit_try_run_case+0x1a5/0x480 [ 12.060277] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.060751] kthread+0x337/0x6f0 [ 12.060931] ret_from_fork+0x116/0x1d0 [ 12.061313] ret_from_fork_asm+0x1a/0x30 [ 12.061768] [ 12.062015] The buggy address belongs to the object at ffff888101ccd2c0 [ 12.062015] which belongs to the cache kmalloc-16 of size 16 [ 12.062752] The buggy address is located 0 bytes inside of [ 12.062752] freed 16-byte region [ffff888101ccd2c0, ffff888101ccd2d0) [ 12.063293] [ 12.063613] The buggy address belongs to the physical page: [ 12.063847] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101ccd [ 12.064350] flags: 0x200000000000000(node=0|zone=2) [ 12.064832] page_type: f5(slab) [ 12.065019] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.065617] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.066135] page dumped because: kasan: bad access detected [ 12.066558] [ 12.066635] Memory state around the buggy address: [ 12.066842] ffff888101ccd180: fa fb fc fc fa fb fc fc 00 00 fc fc 00 00 fc fc [ 12.067155] ffff888101ccd200: 00 00 fc fc 00 00 fc fc fa fb fc fc fa fb fc fc [ 12.067780] >ffff888101ccd280: fa fb fc fc 00 00 fc fc fa fb fc fc fc fc fc fc [ 12.068092] ^ [ 12.068305] ffff888101ccd300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.068856] ffff888101ccd380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.069247] ==================================================================