Date
July 19, 2025, 11:11 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 15.410122] ================================================================== [ 15.410182] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x300/0x338 [ 15.410247] Read of size 1 at addr fff00000c5f9c4a8 by task kunit_try_catch/185 [ 15.411204] [ 15.411303] CPU: 1 UID: 0 PID: 185 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.411486] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.411515] Hardware name: linux,dummy-virt (DT) [ 15.411556] Call trace: [ 15.411579] show_stack+0x20/0x38 (C) [ 15.411626] dump_stack_lvl+0x8c/0xd0 [ 15.411672] print_report+0x118/0x5d0 [ 15.411718] kasan_report+0xdc/0x128 [ 15.411827] __asan_report_load1_noabort+0x20/0x30 [ 15.412097] kmalloc_uaf+0x300/0x338 [ 15.412317] kunit_try_run_case+0x170/0x3f0 [ 15.412688] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.414155] kthread+0x328/0x630 [ 15.414214] ret_from_fork+0x10/0x20 [ 15.414493] [ 15.414543] Allocated by task 185: [ 15.414576] kasan_save_stack+0x3c/0x68 [ 15.414620] kasan_save_track+0x20/0x40 [ 15.414658] kasan_save_alloc_info+0x40/0x58 [ 15.414977] __kasan_kmalloc+0xd4/0xd8 [ 15.415895] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.416457] kmalloc_uaf+0xb8/0x338 [ 15.416507] kunit_try_run_case+0x170/0x3f0 [ 15.416913] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.416970] kthread+0x328/0x630 [ 15.417023] ret_from_fork+0x10/0x20 [ 15.417060] [ 15.417146] Freed by task 185: [ 15.417230] kasan_save_stack+0x3c/0x68 [ 15.417267] kasan_save_track+0x20/0x40 [ 15.417484] kasan_save_free_info+0x4c/0x78 [ 15.417523] __kasan_slab_free+0x6c/0x98 [ 15.417579] kfree+0x214/0x3c8 [ 15.417639] kmalloc_uaf+0x11c/0x338 [ 15.417675] kunit_try_run_case+0x170/0x3f0 [ 15.417723] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.417766] kthread+0x328/0x630 [ 15.417873] ret_from_fork+0x10/0x20 [ 15.418226] [ 15.418511] The buggy address belongs to the object at fff00000c5f9c4a0 [ 15.418511] which belongs to the cache kmalloc-16 of size 16 [ 15.418588] The buggy address is located 8 bytes inside of [ 15.418588] freed 16-byte region [fff00000c5f9c4a0, fff00000c5f9c4b0) [ 15.419020] [ 15.419134] The buggy address belongs to the physical page: [ 15.419167] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105f9c [ 15.419225] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.419346] page_type: f5(slab) [ 15.419456] raw: 0bfffe0000000000 fff00000c0001640 dead000000000122 0000000000000000 [ 15.419507] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 15.419593] page dumped because: kasan: bad access detected [ 15.419827] [ 15.420000] Memory state around the buggy address: [ 15.420036] fff00000c5f9c380: fa fb fc fc fa fb fc fc fa fb fc fc 00 04 fc fc [ 15.420324] fff00000c5f9c400: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 15.420462] >fff00000c5f9c480: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 15.420556] ^ [ 15.420589] fff00000c5f9c500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.420632] fff00000c5f9c580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.420671] ==================================================================
[ 12.327424] ================================================================== [ 12.327949] BUG: KASAN: slab-use-after-free in kmalloc_uaf+0x320/0x380 [ 12.328488] Read of size 1 at addr ffff888101642a28 by task kunit_try_catch/202 [ 12.328805] [ 12.328920] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.328987] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.328998] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.329018] Call Trace: [ 12.329030] <TASK> [ 12.329046] dump_stack_lvl+0x73/0xb0 [ 12.329076] print_report+0xd1/0x610 [ 12.329098] ? __virt_addr_valid+0x1db/0x2d0 [ 12.329121] ? kmalloc_uaf+0x320/0x380 [ 12.329139] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.329235] ? kmalloc_uaf+0x320/0x380 [ 12.329257] kasan_report+0x141/0x180 [ 12.329278] ? kmalloc_uaf+0x320/0x380 [ 12.329301] __asan_report_load1_noabort+0x18/0x20 [ 12.329325] kmalloc_uaf+0x320/0x380 [ 12.329343] ? __pfx_kmalloc_uaf+0x10/0x10 [ 12.329362] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 12.329388] ? trace_hardirqs_on+0x37/0xe0 [ 12.329412] ? __pfx_read_tsc+0x10/0x10 [ 12.329451] ? ktime_get_ts64+0x86/0x230 [ 12.329475] kunit_try_run_case+0x1a5/0x480 [ 12.329509] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.329533] ? queued_spin_lock_slowpath+0x116/0xb40 [ 12.329557] ? __kthread_parkme+0x82/0x180 [ 12.329577] ? preempt_count_sub+0x50/0x80 [ 12.329601] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.329624] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.329646] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.329670] kthread+0x337/0x6f0 [ 12.329688] ? trace_preempt_on+0x20/0xc0 [ 12.329727] ? __pfx_kthread+0x10/0x10 [ 12.329746] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.329767] ? calculate_sigpending+0x7b/0xa0 [ 12.329790] ? __pfx_kthread+0x10/0x10 [ 12.329811] ret_from_fork+0x116/0x1d0 [ 12.329829] ? __pfx_kthread+0x10/0x10 [ 12.329848] ret_from_fork_asm+0x1a/0x30 [ 12.329894] </TASK> [ 12.329904] [ 12.337625] Allocated by task 202: [ 12.337788] kasan_save_stack+0x45/0x70 [ 12.337932] kasan_save_track+0x18/0x40 [ 12.338064] kasan_save_alloc_info+0x3b/0x50 [ 12.338276] __kasan_kmalloc+0xb7/0xc0 [ 12.338456] __kmalloc_cache_noprof+0x189/0x420 [ 12.338683] kmalloc_uaf+0xaa/0x380 [ 12.338858] kunit_try_run_case+0x1a5/0x480 [ 12.339204] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.339467] kthread+0x337/0x6f0 [ 12.339611] ret_from_fork+0x116/0x1d0 [ 12.339740] ret_from_fork_asm+0x1a/0x30 [ 12.339930] [ 12.340025] Freed by task 202: [ 12.340339] kasan_save_stack+0x45/0x70 [ 12.340554] kasan_save_track+0x18/0x40 [ 12.340725] kasan_save_free_info+0x3f/0x60 [ 12.340936] __kasan_slab_free+0x56/0x70 [ 12.341107] kfree+0x222/0x3f0 [ 12.341254] kmalloc_uaf+0x12c/0x380 [ 12.341451] kunit_try_run_case+0x1a5/0x480 [ 12.341812] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.342114] kthread+0x337/0x6f0 [ 12.342284] ret_from_fork+0x116/0x1d0 [ 12.342620] ret_from_fork_asm+0x1a/0x30 [ 12.342755] [ 12.342822] The buggy address belongs to the object at ffff888101642a20 [ 12.342822] which belongs to the cache kmalloc-16 of size 16 [ 12.343682] The buggy address is located 8 bytes inside of [ 12.343682] freed 16-byte region [ffff888101642a20, ffff888101642a30) [ 12.344176] [ 12.344336] The buggy address belongs to the physical page: [ 12.344725] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101642 [ 12.345121] flags: 0x200000000000000(node=0|zone=2) [ 12.345295] page_type: f5(slab) [ 12.345418] raw: 0200000000000000 ffff888100041640 dead000000000122 0000000000000000 [ 12.345784] raw: 0000000000000000 0000000080800080 00000000f5000000 0000000000000000 [ 12.346200] page dumped because: kasan: bad access detected [ 12.346443] [ 12.346521] Memory state around the buggy address: [ 12.346743] ffff888101642900: 00 04 fc fc 00 01 fc fc 00 01 fc fc 00 04 fc fc [ 12.347077] ffff888101642980: 00 04 fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 12.347647] >ffff888101642a00: fa fb fc fc fa fb fc fc fc fc fc fc fc fc fc fc [ 12.347944] ^ [ 12.348307] ffff888101642a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.348609] ffff888101642b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.348927] ==================================================================