syzkaller login: [ 23.754957] BUG: Bad rss-counter state mm:00000000bc10b548 type:MM_FILEPAGES val:33 [ 23.755779] BUG: Bad rss-counter state mm:00000000bc10b548 type:MM_ANONPAGES val:22 [ 23.925961] ================================================================== [ 23.927220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.928514] Read of size 8 at addr ffff88800fe2a058 by task sshd/220 [ 23.929396] [ 23.929615] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.930491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.931680] Call Trace: [ 23.932008] [ 23.932297] dump_stack_lvl+0x91/0xf0 [ 23.932823] print_report+0xcc/0x620 [ 23.933343] ? __virt_addr_valid+0x102/0x340 [ 23.933920] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.934592] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.935324] kasan_report+0xbe/0xf0 [ 23.935867] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.936520] vma_interval_tree_remove+0xc75/0xec0 [ 23.937169] vma_prepare+0xc54/0x11a0 [ 23.937688] __split_vma+0x5af/0x950 [ 23.938162] ? __pfx___split_vma+0x10/0x10 [ 23.938757] ? find_held_lock+0x2c/0x110 [ 23.939342] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.939941] ? lock_is_held_type+0x9f/0x120 [ 23.940505] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.941151] ? mtree_range_walk+0x632/0x900 [ 23.941753] ? mas_walk+0x5c7/0x7c0 [ 23.942239] do_vmi_munmap+0x1f1/0x2b0 [ 23.942784] mmap_region+0x1f9/0x2660 [ 23.943300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.943817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.944565] ? __pfx_lock_acquire+0x10/0x10 [ 23.945102] ? __pfx_mmap_region+0x10/0x10 [ 23.945664] ? security_mmap_addr+0x7d/0xa0 [ 23.946230] ? get_unmapped_area+0x1f5/0x3f0 [ 23.946830] do_mmap+0x854/0xf00 [ 23.947279] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.947823] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.948396] ksys_mmap_pgoff+0x3af/0x500 [ 23.948944] do_syscall_64+0x3f/0x90 [ 23.949426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.950122] RIP: 0033:0x7fdbee962d82 [ 23.950584] 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 [ 23.953333] RSP: 002b:00007ffece213b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.954447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbee962d82 [ 23.955535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbedd9c000 [ 23.956589] RBP: 00007fdbedd9c000 R08: 0000000000000009 R09: 0000000000001000 [ 23.957644] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9c5c0dec0 [ 23.958692] R13: 00007ffece213bb0 R14: 00007ffece213be0 R15: 00007ffece213f40 [ 23.959772] [ 23.960137] [ 23.960398] Allocated by task 213: [ 23.960998] kasan_save_stack+0x22/0x50 [ 23.961703] kasan_set_track+0x25/0x30 [ 23.962365] __kasan_slab_alloc+0x59/0x70 [ 23.963137] kmem_cache_alloc+0x16b/0x370 [ 23.963782] vm_area_dup+0x20/0x160 [ 23.964360] __split_vma+0x170/0x950 [ 23.964940] split_vma+0xc6/0x110 [ 23.965480] mprotect_fixup+0x8d2/0xb30 [ 23.966098] do_mprotect_pkey+0x87e/0xd40 [ 23.966762] __x64_sys_mprotect+0x78/0xc0 [ 23.967419] do_syscall_64+0x3f/0x90 [ 23.967901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.968556] [ 23.968775] Freed by task 213: [ 23.969172] kasan_save_stack+0x22/0x50 [ 23.969750] kasan_set_track+0x25/0x30 [ 23.970253] kasan_save_free_info+0x2b/0x50 [ 23.970814] __kasan_slab_free+0x10a/0x190 [ 23.971365] kmem_cache_free+0x10d/0x4d0 [ 23.971881] rcu_core+0x8c8/0x2860 [ 23.972336] __do_softirq+0x1b7/0x7d4 [ 23.972819] [ 23.973036] Last potentially related work creation: [ 23.973635] kasan_save_stack+0x22/0x50 [ 23.974168] __kasan_record_aux_stack+0x8e/0xa0 [ 23.974754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.975407] remove_vma+0x139/0x170 [ 23.975875] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.976445] do_vmi_munmap+0x1f1/0x2b0 [ 23.976944] __vm_munmap+0x138/0x3a0 [ 23.977431] __x64_sys_munmap+0x59/0x80 [ 23.977990] do_syscall_64+0x3f/0x90 [ 23.978502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.979218] [ 23.979447] The buggy address belongs to the object at ffff88800fe2a000 [ 23.979447] which belongs to the cache vm_area_struct of size 168 [ 23.981031] The buggy address is located 88 bytes inside of [ 23.981031] freed 168-byte region [ffff88800fe2a000, ffff88800fe2a0a8) [ 23.982562] [ 23.982801] The buggy address belongs to the physical page: [ 23.983509] page:00000000e94e7bd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe2a [ 23.984675] memcg:ffff88800e63c701 [ 23.985138] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.985828] page_type: 0xffffffff() [ 23.986299] raw: 0100000000000200 ffff8880087a0c80 ffffea000059fcc0 dead000000000002 [ 23.987304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e63c701 [ 23.988284] page dumped because: kasan: bad access detected [ 23.989003] [ 23.989230] Memory state around the buggy address: [ 23.989862] ffff88800fe29f00: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.990783] ffff88800fe29f80: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.991696] >ffff88800fe2a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.992614] ^ [ 23.993377] ffff88800fe2a080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 23.994314] ffff88800fe2a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.995240] ================================================================== [ 23.996327] Disabling lock debugging due to kernel taint [ 26.257838] BUG: Bad rss-counter state mm:0000000043523705 type:MM_FILEPAGES val:33 [ 26.258611] BUG: Bad rss-counter state mm:0000000043523705 type:MM_ANONPAGES val:22 [ 26.772293] BUG: Bad rss-counter state mm:00000000bde533d5 type:MM_FILEPAGES val:33 [ 26.773475] BUG: Bad rss-counter state mm:00000000bde533d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14427' (ECDSA) to the list of known hosts. 2023/06/20 19:25:22 fuzzer started 2023/06/20 19:25:23 dialing manager at localhost:36067 2023/06/20 19:25:23 checking machine... 2023/06/20 19:25:23 checking revisions... [ 27.476849] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:25:23 testing simple program... [ 27.528749] cgroup: Unknown subsys name 'net' [ 27.565714] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:25:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000020 RCX=0000000000000000 RDX=0000000000000020 RSI=0000000000000000 RDI=ffff88800e33f880 RBP=ffff88800fd3fca0 RSP=ffff88800fd3fc38 R8 =ffff88800e33f880 R9 =0000000000000000 R10=ffff88800e33f880 R11=00000000000b6a61 R12=ffff888008441500 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff845133e9 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 00007fd1411ac900 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=00007fd141761650 CR3=000000000f15c000 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=ffff888008e38001 RBX=ffff888008e37ec8 RCX=0000000000000001 RDX=ffff888008e37ed0 RSI=ffff888008e37e98 RDI=ffff888008e37988 RBP=ffff888008e30000 RSP=ffff888008e37908 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37e98 R15=ffff888008e37978 RIP=ffffffff8113128d RFL=00000287 [--S--PC] 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 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=00007f848f680f10 CR3=000000000c960000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=69812d4d44188e5d00000000000ae988 XMM05=0229a2fa590fd6be00000000001328b8 XMM06=4fda316b135da52b0000000000131338 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000