RDX: 0000000000000460 RSI: 0000000000000005 RDI: 0000000000000003 RBP: 00007ffd0c5c2460 R08: 0000000000000001 R09: 00007ffd0c5c2470 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009 R13: 00007ffd0c5c2480 R14: 00007ffd0c5c24c0 R15: 0000000000000000 ================================================================== BUG: KASAN: use-after-free in prog_list_prog kernel/bpf/cgroup.c:174 [inline] BUG: KASAN: use-after-free in prog_list_length kernel/bpf/cgroup.c:187 [inline] BUG: KASAN: use-after-free in compute_effective_progs+0x1a1/0x620 kernel/bpf/cgroup.c:240 Read of size 8 at addr ffff88810922f018 by task syz-executor293/423 CPU: 0 PID: 423 Comm: syz-executor293 Not tainted 5.18.0-rc1-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:313 [inline] print_report+0x166/0x620 mm/kasan/report.c:429 kasan_report+0xee/0x120 mm/kasan/report.c:491 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:307 prog_list_prog kernel/bpf/cgroup.c:174 [inline] prog_list_length kernel/bpf/cgroup.c:187 [inline] compute_effective_progs+0x1a1/0x620 kernel/bpf/cgroup.c:240 update_effective_progs+0x79/0x320 kernel/bpf/cgroup.c:343 __cgroup_bpf_detach+0x2fa/0x550 kernel/bpf/cgroup.c:725 bpf_cgroup_link_release+0x94/0x230 kernel/bpf/cgroup.c:899 bpf_link_free kernel/bpf/syscall.c:2469 [inline] bpf_link_put+0x1e9/0x270 kernel/bpf/syscall.c:2495 bpf_link_release+0x3b/0x40 kernel/bpf/syscall.c:2504 __fput+0x3ee/0x890 fs/file_table.c:317 ____fput+0x15/0x20 fs/file_table.c:350 task_work_run+0x147/0x1b0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0xe0/0xf0 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:294 do_syscall_64+0x3e/0x50 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f39d9de4243 Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 RSP: 002b:00007ffd0c5c2438 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000009 RCX: 00007f39d9de4243 RDX: 0000000000000460 RSI: 0000000000000005 RDI: 0000000000000008 RBP: 00007ffd0c5c2460 R08: 0000000000000001 R09: 00007ffd0c5c2470 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000009 R13: 00007ffd0c5c2480 R14: 00007ffd0c5c24c0 R15: 0000000000000000 Allocated by task 423: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:524 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x22e/0x3a0 mm/slub.c:3258 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] cgroup_bpf_link_attach+0x12e/0x4a0 kernel/bpf/cgroup.c:983 link_create kernel/bpf/syscall.c:4320 [inline] __sys_bpf+0x996e/0x123e0 kernel/bpf/syscall.c:4733 __do_sys_bpf kernel/bpf/syscall.c:4767 [inline] __se_sys_bpf kernel/bpf/syscall.c:4765 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4765 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 423: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x140/0x180 mm/kasan/common.c:366 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0xc9/0x1a0 mm/slub.c:1754 slab_free mm/slub.c:3510 [inline] kfree+0xc0/0x2a0 mm/slub.c:4552 bpf_cgroup_link_dealloc+0x15/0x20 kernel/bpf/cgroup.c:914 bpf_link_free kernel/bpf/syscall.c:2473 [inline] bpf_link_put+0x243/0x270 kernel/bpf/syscall.c:2495 bpf_link_release+0x3b/0x40 kernel/bpf/syscall.c:2504 __fput+0x3ee/0x890 fs/file_table.c:317 ____fput+0x15/0x20 fs/file_table.c:350 task_work_run+0x147/0x1b0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0xe0/0xf0 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:294 do_syscall_64+0x3e/0x50 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88810922f000 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 24 bytes inside of 96-byte region [ffff88810922f000, ffff88810922f060) The buggy address belongs to the physical page: page:ffffea0004248bc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10922f flags: 0x8000000000000200(slab|zone=2) raw: 8000000000000200 ffffea0004248940 dead000000000005 ffff888100041780 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 1364686773, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x161/0x170 mm/page_alloc.c:2434 prep_new_page mm/page_alloc.c:2441 [inline] get_page_from_freelist+0x3a7/0xae0 mm/page_alloc.c:4182 __alloc_pages+0x3bd/0x830 mm/page_alloc.c:5408 allocate_slab+0x67/0x320 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x1d2/0x4a0 mm/slub.c:3005 __slab_alloc mm/slub.c:3092 [inline] slab_alloc_node mm/slub.c:3183 [inline] slab_alloc mm/slub.c:3225 [inline] kmem_cache_alloc_trace+0x289/0x3a0 mm/slub.c:3256 kmalloc include/linux/slab.h:581 [inline] kzalloc include/linux/slab.h:714 [inline] acpi_os_allocate_zeroed include/acpi/platform/aclinuxex.h:57 [inline] acpi_evaluate_object+0x155/0xac9 drivers/acpi/acpica/nsxfeval.c:177 acpi_evaluate_integer+0x124/0x240 drivers/acpi/utils.c:260 acpi_bus_get_status_handle drivers/acpi/bus.c:84 [inline] acpi_bus_get_status+0x14e/0x250 drivers/acpi/bus.c:113 acpi_bus_attach+0x294/0xdc0 drivers/acpi/scan.c:2216 acpi_bus_attach+0x3bc/0xdc0 drivers/acpi/scan.c:2259 acpi_bus_attach+0x3bc/0xdc0 drivers/acpi/scan.c:2259 acpi_bus_scan+0x10a/0x200 drivers/acpi/scan.c:2448 acpi_scan_init+0x276/0x75b drivers/acpi/scan.c:2613 acpi_init+0x148/0x1fb drivers/acpi/bus.c:1361 do_one_initcall+0x1c3/0x5d0 init/main.c:1298 page_owner free stack trace missing Memory state around the buggy address: ffff88810922ef00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88810922ef80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88810922f000: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff88810922f080: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88810922f100: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================