ci2 starts bisection 2022-11-12 08:31:41.804266049 +0000 UTC m=+105188.960509012 bisecting fixing commit since 43eb03f7ce813eb0f252025aa432581ecff44ac7 building syzkaller on 3f6b40a114c25e1597234e0fa1088f6bc2711015 ensuring issue is reproducible on original commit 43eb03f7ce813eb0f252025aa432581ecff44ac7 testing commit 43eb03f7ce813eb0f252025aa432581ecff44ac7 gcc compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2ac9f8b700f628b9724ee5c9d179b4b418798994941eb62815150f08ab6ab340 run #0: crashed: KASAN: invalid-free in anon_vma_name_free run #1: crashed: KASAN: invalid-free in anon_vma_name_free run #2: crashed: general protection fault in vma_interval_tree_insert_after run #3: crashed: KASAN: invalid-free in anon_vma_name_free run #4: crashed: KASAN: invalid-free in anon_vma_name_free run #5: crashed: general protection fault in vma_interval_tree_insert_after run #6: crashed: general protection fault in vma_interval_tree_insert_after run #7: crashed: KASAN: invalid-free in anon_vma_name_free run #8: crashed: KASAN: invalid-free in anon_vma_name_free run #9: crashed: KASAN: invalid-free in anon_vma_name_free run #10: crashed: KASAN: invalid-free in anon_vma_name_free run #11: crashed: general protection fault in vma_interval_tree_insert_after run #12: crashed: KASAN: invalid-free in anon_vma_name_free run #13: crashed: KASAN: invalid-free in anon_vma_name_free run #14: crashed: KASAN: invalid-free in anon_vma_name_free run #15: crashed: KASAN: invalid-free in anon_vma_name_free run #16: crashed: general protection fault in vma_interval_tree_insert_after run #17: crashed: KASAN: invalid-free in anon_vma_name_free run #18: crashed: KASAN: invalid-free in anon_vma_name_free run #19: crashed: KASAN: invalid-free in anon_vma_name_free testing current HEAD 7f2e600bf63a9cda882a6c86de04183e5061e8ee testing commit 7f2e600bf63a9cda882a6c86de04183e5061e8ee gcc compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: dc6c0f2b76544c17aab7625ef2406fcd4c7ab26f4fb24577c3bc57489a97a0f9 run #0: crashed: KASAN: invalid-free in anon_vma_name_free run #1: crashed: KASAN: invalid-free in anon_vma_name_free run #2: crashed: general protection fault in vma_interval_tree_insert_after run #3: crashed: general protection fault in vma_interval_tree_insert_after run #4: crashed: KASAN: invalid-free in anon_vma_name_free run #5: crashed: general protection fault in vma_interval_tree_insert_after run #6: crashed: KASAN: invalid-free in anon_vma_name_free run #7: crashed: KASAN: invalid-free in anon_vma_name_free run #8: crashed: general protection fault in vma_interval_tree_insert_after run #9: crashed: KASAN: invalid-free in anon_vma_name_free revisions tested: 2, total time: 19m6.544188464s (build: 13m0.478807829s, test: 5m32.652399335s) the crash still happens on HEAD commit msg: Merge 5.15.74 into android13-5.15-lts crash: KASAN: invalid-free in anon_vma_name_free RSP: 002b:00007fbd92b42118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fbd92ceef80 RCX: 00007fbd92bce5a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000001000 RBP: 00007fbd92b421d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002 R13: 00007ffc3ece863f R14: 00007fbd92b42300 R15: 0000000000022000 ================================================================== BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3515 [inline] BUG: KASAN: double-free or invalid-free in kfree+0xc8/0x210 mm/slub.c:4575 CPU: 1 PID: 512 Comm: syz-executor.0 Not tainted 5.15.74-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x105/0x148 lib/dump_stack.c:106 print_address_description+0x87/0x3d0 mm/kasan/report.c:256 kasan_report_invalid_free+0x72/0xa0 mm/kasan/report.c:378 ____kasan_slab_free+0x13e/0x160 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1721 [inline] slab_free_freelist_hook+0xc9/0x1a0 mm/slub.c:1747 slab_free mm/slub.c:3515 [inline] kfree+0xc8/0x210 mm/slub.c:4575 anon_vma_name_free+0x9/0x10 mm/madvise.c:88 kref_put include/linux/kref.h:65 [inline] anon_vma_name_put include/linux/mm_inline.h:343 [inline] free_anon_vma_name include/linux/mm_inline.h:374 [inline] vm_area_free+0x16f/0x1b0 kernel/fork.c:400 dup_mmap+0x99f/0xc30 kernel/fork.c:671 dup_mm+0x86/0x280 kernel/fork.c:1502 copy_mm+0xea/0x160 kernel/fork.c:1554 copy_process+0xed6/0x2eb0 kernel/fork.c:2245 kernel_clone+0x18f/0x780 kernel/fork.c:2646 __do_sys_clone kernel/fork.c:2772 [inline] __se_sys_clone kernel/fork.c:2756 [inline] __x64_sys_clone+0x284/0x300 kernel/fork.c:2756 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbd92bce5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbd92b42118 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fbd92ceef80 RCX: 00007fbd92bce5a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000001000 RBP: 00007fbd92b421d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000002 R13: 00007ffc3ece863f R14: 00007fbd92b42300 R15: 0000000000022000 Allocated by task 462: 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:433 [inline] __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:466 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook mm/slab.h:550 [inline] slab_alloc_node mm/slub.c:3236 [inline] slab_alloc mm/slub.c:3244 [inline] kmem_cache_alloc+0x189/0x2f0 mm/slub.c:3249 vm_area_dup+0x21/0x170 kernel/fork.c:367 dup_mmap+0x5c8/0xc30 kernel/fork.c:591 dup_mm+0x86/0x280 kernel/fork.c:1502 copy_mm+0xea/0x160 kernel/fork.c:1554 copy_process+0xed6/0x2eb0 kernel/fork.c:2245 kernel_clone+0x18f/0x780 kernel/fork.c:2646 __do_sys_clone kernel/fork.c:2772 [inline] __se_sys_clone kernel/fork.c:2756 [inline] __x64_sys_clone+0x284/0x300 kernel/fork.c:2756 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff88811b5b6a68 which belongs to the cache vm_area_struct of size 232 The buggy address is located 88 bytes inside of 232-byte region [ffff88811b5b6a68, ffff88811b5b6b50) The buggy address belongs to the page: page:ffffea00046d6d80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11b5b6 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 dead000000000122 ffff888100275800 raw: 0000000000000000 00000000000d000d 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 462, ts 43211357658, free_ts 43207771175 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1ab/0x1b0 mm/page_alloc.c:2495 prep_new_page mm/page_alloc.c:2501 [inline] get_page_from_freelist+0x38b/0x400 mm/page_alloc.c:4281 __alloc_pages+0x3a8/0x7c0 mm/page_alloc.c:5548 allocate_slab+0x62/0x580 mm/slub.c:1928 new_slab mm/slub.c:1991 [inline] ___slab_alloc+0x2e2/0x6f0 mm/slub.c:3024 __slab_alloc+0x4a/0x90 mm/slub.c:3111 slab_alloc_node mm/slub.c:3202 [inline] slab_alloc mm/slub.c:3244 [inline] kmem_cache_alloc+0x205/0x2f0 mm/slub.c:3249 vm_area_alloc+0x1f/0x120 kernel/fork.c:359 mmap_region+0x841/0x1490 mm/mmap.c:1780 do_mmap+0x545/0xa00 mm/mmap.c:1584 vm_mmap_pgoff+0x1b4/0x370 mm/util.c:554 ksys_mmap_pgoff+0xbc/0x140 mm/mmap.c:1633 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:93 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __x64_sys_mmap+0x103/0x120 arch/x86/kernel/sys_x86_64.c:86 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1364 [inline] free_pcp_prepare+0x448/0x450 mm/page_alloc.c:1435 free_unref_page_prepare mm/page_alloc.c:3433 [inline] free_unref_page+0x9c/0x370 mm/page_alloc.c:3513 free_the_page mm/page_alloc.c:706 [inline] __free_pages+0xd8/0x100 mm/page_alloc.c:5621 free_pages+0x7c/0x90 mm/page_alloc.c:5632 do_proc_readlink fs/proc/base.c:1786 [inline] proc_pid_readlink+0x206/0x270 fs/proc/base.c:1804 vfs_readlink+0x33d/0x390 fs/namei.c:4915 do_readlinkat+0x22e/0x320 fs/stat.c:454 __do_sys_readlink fs/stat.c:475 [inline] __se_sys_readlink fs/stat.c:472 [inline] __x64_sys_readlink+0x7a/0x90 fs/stat.c:472 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Memory state around the buggy address: ffff88811b5b6980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88811b5b6a00: 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 >ffff88811b5b6a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88811b5b6b00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff88811b5b6b80: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================