syzkaller login: [ 50.687719] BUG: Bad rss-counter state mm:000000009398c3be type:MM_FILEPAGES val:33 [ 50.688946] BUG: Bad rss-counter state mm:000000009398c3be type:MM_ANONPAGES val:22 [ 50.840019] ================================================================== [ 50.840910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.841795] Read of size 8 at addr ffff88800e7495c8 by task sshd/220 [ 50.842509] [ 50.842718] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.843665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.844591] Call Trace: [ 50.844898] <TASK> [ 50.845173] dump_stack_lvl+0x91/0xf0 [ 50.845675] print_report+0xcc/0x620 [ 50.846149] ? __virt_addr_valid+0x102/0x340 [ 50.846683] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.847295] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.847926] kasan_report+0xbe/0xf0 [ 50.848404] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.849015] vma_interval_tree_remove+0xc75/0xec0 [ 50.849614] vma_prepare+0xc54/0x11a0 [ 50.850120] __split_vma+0x5af/0x950 [ 50.850640] ? __pfx___split_vma+0x10/0x10 [ 50.851198] ? find_held_lock+0x2c/0x110 [ 50.851750] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.852344] ? lock_is_held_type+0x9f/0x120 [ 50.852917] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.853554] ? mtree_range_walk+0x632/0x900 [ 50.854130] ? mas_walk+0x5c7/0x7c0 [ 50.854629] do_vmi_munmap+0x1f1/0x2b0 [ 50.855155] mmap_region+0x1f9/0x2660 [ 50.855689] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.856244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.857010] ? __pfx_lock_acquire+0x10/0x10 [ 50.857587] ? __pfx_mmap_region+0x10/0x10 [ 50.858141] ? security_mmap_addr+0x7d/0xa0 [ 50.858697] ? get_unmapped_area+0x1f5/0x3f0 [ 50.859284] do_mmap+0x854/0xf00 [ 50.859775] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.860294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.860887] ksys_mmap_pgoff+0x3af/0x500 [ 50.861421] do_syscall_64+0x3f/0x90 [ 50.861928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.862592] RIP: 0033:0x7f5e8650cd82 [ 50.863071] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 50.865345] RSP: 002b:00007ffe131b5958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.866318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e8650cd82 [ 50.867183] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e85946000 [ 50.868051] RBP: 00007f5e85946000 R08: 0000000000000009 R09: 0000000000001000 [ 50.868886] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e08d00ec0 [ 50.869724] R13: 00007ffe131b5970 R14: 00007ffe131b59a0 R15: 00007ffe131b5d00 [ 50.870564] </TASK> [ 50.870844] [ 50.871055] Allocated by task 213: [ 50.871477] kasan_save_stack+0x22/0x50 [ 50.871995] kasan_set_track+0x25/0x30 [ 50.872484] __kasan_slab_alloc+0x59/0x70 [ 50.873005] kmem_cache_alloc+0x16b/0x370 [ 50.873522] vm_area_dup+0x20/0x160 [ 50.873982] __split_vma+0x170/0x950 [ 50.874447] split_vma+0xc6/0x110 [ 50.874893] mprotect_fixup+0x8d2/0xb30 [ 50.875397] do_mprotect_pkey+0x87e/0xd40 [ 50.875931] __x64_sys_mprotect+0x78/0xc0 [ 50.876434] do_syscall_64+0x3f/0x90 [ 50.876895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.877536] [ 50.877753] Freed by task 213: [ 50.878146] kasan_save_stack+0x22/0x50 [ 50.878649] kasan_set_track+0x25/0x30 [ 50.879138] kasan_save_free_info+0x2b/0x50 [ 50.879674] __kasan_slab_free+0x10a/0x190 [ 50.880208] kmem_cache_free+0x10d/0x4d0 [ 50.880718] rcu_core+0x8c8/0x2860 [ 50.881161] __do_softirq+0x1b7/0x7d4 [ 50.881640] [ 50.881854] Last potentially related work creation: [ 50.882433] kasan_save_stack+0x22/0x50 [ 50.882932] __kasan_record_aux_stack+0x8e/0xa0 [ 50.883530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.884167] remove_vma+0x139/0x170 [ 50.884623] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.885181] do_vmi_munmap+0x1f1/0x2b0 [ 50.885657] __vm_munmap+0x138/0x3a0 [ 50.886121] __x64_sys_munmap+0x59/0x80 [ 50.886615] do_syscall_64+0x3f/0x90 [ 50.887086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.887730] [ 50.887943] Second to last potentially related work creation: [ 50.888625] kasan_save_stack+0x22/0x50 [ 50.889122] __kasan_record_aux_stack+0x8e/0xa0 [ 50.889700] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.890338] remove_vma+0x139/0x170 [ 50.890787] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.891342] do_vmi_munmap+0x1f1/0x2b0 [ 50.891852] __vm_munmap+0x138/0x3a0 [ 50.892315] elf_map+0x26f/0x310 [ 50.892758] load_elf_binary+0xd82/0x5030 [ 50.893277] bprm_execve+0x803/0x1940 [ 50.893742] do_execveat_common+0x734/0x8e0 [ 50.894264] __x64_sys_execve+0x93/0xc0 [ 50.894751] do_syscall_64+0x3f/0x90 [ 50.895218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.895864] [ 50.896075] The buggy address belongs to the object at ffff88800e749570 [ 50.896075] which belongs to the cache vm_area_struct of size 168 [ 50.897539] The buggy address is located 88 bytes inside of [ 50.897539] freed 168-byte region [ffff88800e749570, ffff88800e749618) [ 50.898936] [ 50.899150] The buggy address belongs to the physical page: [ 50.899820] page:000000007e7b3716 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe749 [ 50.900887] memcg:ffff88800e73bb01 [ 50.901306] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.902008] page_type: 0xffffffff() [ 50.902462] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 50.903371] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e73bb01 [ 50.904310] page dumped because: kasan: bad access detected [ 50.904964] [ 50.905178] Memory state around the buggy address: [ 50.905755] ffff88800e749480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.906616] ffff88800e749500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 50.907471] >ffff88800e749580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.908322] ^ [ 50.908988] ffff88800e749600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 50.909840] ffff88800e749680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.910687] ================================================================== [ 50.911993] Disabling lock debugging due to kernel taint [ 52.945105] BUG: Bad rss-counter state mm:000000008c3fd29f type:MM_FILEPAGES val:33 [ 52.946061] BUG: Bad rss-counter state mm:000000008c3fd29f type:MM_ANONPAGES val:22 [ 53.462077] BUG: Bad rss-counter state mm:00000000872ea82b type:MM_FILEPAGES val:33 [ 53.463681] BUG: Bad rss-counter state mm:00000000872ea82b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50348' (ECDSA) to the list of known hosts. 2023/06/20 07:04:04 fuzzer started 2023/06/20 07:04:04 dialing manager at localhost:44161 2023/06/20 07:04:04 checking machine... 2023/06/20 07:04:04 checking revisions... [ 54.114080] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:04:04 testing simple program... [ 54.164887] cgroup: Unknown subsys name 'net' [ 54.212018] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:03:44 Registers: info registers vcpu 0 RAX=ffffffff83c18a20 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff888019ea2840 RDI=ffffffff87f94640 RBP=0000000000000001 RSP=ffff88801c9efe10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffff888019ea2840 R15=0000000000000000 RIP=ffffffff845323e6 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa3f7a17900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fa3f7fcc650 CR3=000000000d622000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7356a6ea70 CR3=000000000f644000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=228ec2088fa40484634565d39e43f47b XMM02=2c67c8bc2e329bc300000000001202a8 XMM03=fb795ef6d65770560000000000124a10 XMM04=3eca88f681842d3000000000000ae988 XMM05=19e9129bd510f2350000000000135cc8 XMM06=0784ab854f0097cd0000000000134b30 XMM07=e042d86d42eb936e0000000000124c90 XMM08=50824f71790d2a5c0000000000120308 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000