Date
Feb. 5, 2025, 2:09 p.m.
| Environment | |
|---|---|
| qemu-armv7 | |
| qemu-x86_64 |
[ 147.208477] ================================================================== [ 147.209227] BUG: KASAN: slab-use-after-free in strlen+0xc/0x44 [ 147.209858] Read of size 1 at addr c8fba210 by task kunit_try_catch/199 [ 147.210574] [ 147.210861] CPU: 1 PID: 199 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 147.211718] Hardware name: Generic DT based system [ 147.212331] unwind_backtrace from show_stack+0x18/0x1c [ 147.213038] show_stack from dump_stack_lvl+0x58/0x70 [ 147.213730] dump_stack_lvl from print_report+0x164/0x51c [ 147.214405] print_report from kasan_report+0xc8/0x104 [ 147.215081] kasan_report from strlen+0xc/0x44 [ 147.215671] strlen from kasan_strings+0x1a8/0x4ec [ 147.216732] kasan_strings from kunit_try_run_case+0x11c/0x2e4 [ 147.217579] kunit_try_run_case from kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 147.218572] kunit_generic_run_threadfn_adapter from kthread+0x184/0x1a8 [ 147.219023] kthread from ret_from_fork+0x14/0x30 [ 147.219675] Exception stack(0xfa0fbfb0 to 0xfa0fbff8) [ 147.220200] bfa0: 00000000 00000000 00000000 00000000 [ 147.221284] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 147.222402] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 147.223216] [ 147.223502] Allocated by task 199: [ 147.223955] kasan_set_track+0x3c/0x5c [ 147.224531] __kasan_kmalloc+0x8c/0x94 [ 147.225034] kasan_strings+0xa0/0x4ec [ 147.225638] kunit_try_run_case+0x11c/0x2e4 [ 147.226665] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 147.227433] kthread+0x184/0x1a8 [ 147.227849] ret_from_fork+0x14/0x30 [ 147.228395] [ 147.228626] Freed by task 199: [ 147.229155] kasan_set_track+0x3c/0x5c [ 147.229699] kasan_save_free_info+0x30/0x3c [ 147.230387] __kasan_slab_free+0xdc/0x124 [ 147.230913] __kmem_cache_free+0x140/0x2a8 [ 147.231610] kasan_strings+0xbc/0x4ec [ 147.232141] kunit_try_run_case+0x11c/0x2e4 [ 147.232672] kunit_generic_run_threadfn_adapter+0x2c/0x48 [ 147.233565] kthread+0x184/0x1a8 [ 147.233975] ret_from_fork+0x14/0x30 [ 147.234536] [ 147.234831] The buggy address belongs to the object at c8fba200 [ 147.234831] which belongs to the cache kmalloc-64 of size 64 [ 147.236478] The buggy address is located 16 bytes inside of [ 147.236478] freed 64-byte region [c8fba200, c8fba240) [ 147.238011] [ 147.238223] The buggy address belongs to the physical page: [ 147.238912] page:3fba6f39 refcount:1 mapcount:0 mapping:00000000 index:0x0 pfn:0x48fba [ 147.239742] flags: 0x800(slab|zone=0) [ 147.240393] page_type: 0xffffffff() [ 147.240820] raw: 00000800 c4801200 00000122 00000000 00000000 80200020 ffffffff 00000001 [ 147.241776] raw: 00000000 [ 147.242304] page dumped because: kasan: bad access detected [ 147.242917] [ 147.243146] Memory state around the buggy address: [ 147.243858] c8fba100: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 147.244676] c8fba180: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 147.245348] >c8fba200: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 147.246604] ^ [ 147.247091] c8fba280: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 147.247871] c8fba300: 00 00 00 00 04 fc fc fc fc fc fc fc fc fc fc fc [ 147.248484] ==================================================================
[ 50.479983] ================================================================== [ 50.480900] BUG: KASAN: slab-use-after-free in strlen+0x13/0x50 [ 50.481849] Read of size 1 at addr ffff8881028cedd0 by task kunit_try_catch/222 [ 50.482583] [ 50.483157] CPU: 1 PID: 222 Comm: kunit_try_catch Tainted: G B N 6.6.76-rc1 #1 [ 50.484612] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 50.485587] Call Trace: [ 50.486003] <TASK> [ 50.486545] dump_stack_lvl+0x4e/0x90 [ 50.487277] print_report+0xd2/0x660 [ 50.487843] ? __virt_addr_valid+0x156/0x1e0 [ 50.488578] ? kasan_complete_mode_report_info+0x64/0x200 [ 50.489375] kasan_report+0xff/0x140 [ 50.489665] ? strlen+0x13/0x50 [ 50.490077] ? strlen+0x13/0x50 [ 50.490584] __asan_load1+0x66/0x70 [ 50.491176] strlen+0x13/0x50 [ 50.491926] kasan_strings+0x1dc/0x510 [ 50.492495] ? __pfx_kasan_strings+0x10/0x10 [ 50.493188] ? __schedule+0x70b/0x1190 [ 50.493921] ? ktime_get_ts64+0x118/0x140 [ 50.495035] kunit_try_run_case+0x126/0x290 [ 50.495817] ? __pfx_kunit_try_run_case+0x10/0x10 [ 50.496590] ? __kasan_check_write+0x18/0x20 [ 50.497413] ? trace_preempt_on+0x20/0xa0 [ 50.498261] ? __kthread_parkme+0x4f/0xd0 [ 50.498960] ? preempt_count_sub+0x50/0x80 [ 50.499502] ? __pfx_kunit_try_run_case+0x10/0x10 [ 50.500575] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 50.501392] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 50.502107] kthread+0x19e/0x1e0 [ 50.502560] ? __pfx_kthread+0x10/0x10 [ 50.503185] ret_from_fork+0x41/0x70 [ 50.503911] ? __pfx_kthread+0x10/0x10 [ 50.504545] ret_from_fork_asm+0x1b/0x30 [ 50.505174] </TASK> [ 50.505519] [ 50.505843] Allocated by task 222: [ 50.506822] kasan_save_stack+0x3c/0x60 [ 50.507538] kasan_set_track+0x29/0x40 [ 50.508246] kasan_save_alloc_info+0x22/0x30 [ 50.508877] __kasan_kmalloc+0xb7/0xc0 [ 50.509346] kmalloc_trace+0x4c/0xb0 [ 50.509899] kasan_strings+0x9f/0x510 [ 50.510410] kunit_try_run_case+0x126/0x290 [ 50.511284] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 50.512465] kthread+0x19e/0x1e0 [ 50.512944] ret_from_fork+0x41/0x70 [ 50.513574] ret_from_fork_asm+0x1b/0x30 [ 50.514332] [ 50.514758] Freed by task 222: [ 50.515170] kasan_save_stack+0x3c/0x60 [ 50.515711] kasan_set_track+0x29/0x40 [ 50.516174] kasan_save_free_info+0x2f/0x50 [ 50.516914] ____kasan_slab_free+0x172/0x1d0 [ 50.518108] __kasan_slab_free+0x16/0x20 [ 50.519348] __kmem_cache_free+0x190/0x310 [ 50.519852] kfree+0x7c/0x120 [ 50.520497] kasan_strings+0xc3/0x510 [ 50.521281] kunit_try_run_case+0x126/0x290 [ 50.522215] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 50.523485] kthread+0x19e/0x1e0 [ 50.524302] ret_from_fork+0x41/0x70 [ 50.524801] ret_from_fork_asm+0x1b/0x30 [ 50.525623] [ 50.526118] The buggy address belongs to the object at ffff8881028cedc0 [ 50.526118] which belongs to the cache kmalloc-32 of size 32 [ 50.527423] The buggy address is located 16 bytes inside of [ 50.527423] freed 32-byte region [ffff8881028cedc0, ffff8881028cede0) [ 50.528991] [ 50.529423] The buggy address belongs to the physical page: [ 50.530323] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1028ce [ 50.531333] flags: 0x200000000000800(slab|node=0|zone=2) [ 50.532017] page_type: 0xffffffff() [ 50.532685] raw: 0200000000000800 ffff888100041500 dead000000000122 0000000000000000 [ 50.533941] raw: 0000000000000000 0000000080400040 00000001ffffffff 0000000000000000 [ 50.534704] page dumped because: kasan: bad access detected [ 50.535459] [ 50.535704] Memory state around the buggy address: [ 50.536402] ffff8881028cec80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 50.537604] ffff8881028ced00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 50.538753] >ffff8881028ced80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 50.539654] ^ [ 50.540440] ffff8881028cee00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.541319] ffff8881028cee80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.542525] ==================================================================