syzkaller login: [ 31.169704] BUG: Bad rss-counter state mm:00000000ac42a4a0 type:MM_FILEPAGES val:33 [ 31.170801] BUG: Bad rss-counter state mm:00000000ac42a4a0 type:MM_ANONPAGES val:22 [ 31.344135] ================================================================== [ 31.345110] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.346110] Read of size 8 at addr ffff888016ac3b38 by task sshd/221 [ 31.346915] [ 31.347249] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.348191] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.349236] Call Trace: [ 31.349578] [ 31.349882] dump_stack_lvl+0x91/0xf0 [ 31.350403] print_report+0xcc/0x620 [ 31.350919] ? __virt_addr_valid+0x102/0x340 [ 31.351559] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352235] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352904] kasan_report+0xbe/0xf0 [ 31.353416] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354098] vma_interval_tree_remove+0xc75/0xec0 [ 31.354749] vma_prepare+0xc54/0x11a0 [ 31.355265] __split_vma+0x5af/0x950 [ 31.355773] ? __pfx___split_vma+0x10/0x10 [ 31.356355] ? find_held_lock+0x2c/0x110 [ 31.356926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357526] ? lock_is_held_type+0x9f/0x120 [ 31.358110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.358759] ? mtree_range_walk+0x632/0x900 [ 31.359367] ? mas_walk+0x5c7/0x7c0 [ 31.359915] do_vmi_munmap+0x1f1/0x2b0 [ 31.360458] mmap_region+0x1f9/0x2660 [ 31.360985] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.361541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.362337] ? __pfx_lock_acquire+0x10/0x10 [ 31.362932] ? __pfx_mmap_region+0x10/0x10 [ 31.363514] ? security_mmap_addr+0x7d/0xa0 [ 31.364106] ? get_unmapped_area+0x1f5/0x3f0 [ 31.364712] do_mmap+0x854/0xf00 [ 31.365198] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.365748] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.366369] ksys_mmap_pgoff+0x3af/0x500 [ 31.366941] do_syscall_64+0x3f/0x90 [ 31.367472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368187] RIP: 0033:0x7fa2e741cd82 [ 31.368695] 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 [ 31.371048] RSP: 002b:00007fff178a4908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.372070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2e741cd82 [ 31.373014] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa2e6856000 [ 31.373951] RBP: 00007fa2e6856000 R08: 0000000000000009 R09: 0000000000001000 [ 31.374883] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598fe41eec0 [ 31.375816] R13: 00007fff178a4920 R14: 00007fff178a4950 R15: 00007fff178a4cb0 [ 31.376770] [ 31.377096] [ 31.377331] Allocated by task 214: [ 31.377805] kasan_save_stack+0x22/0x50 [ 31.378361] kasan_set_track+0x25/0x30 [ 31.378907] __kasan_slab_alloc+0x59/0x70 [ 31.379483] kmem_cache_alloc+0x16b/0x370 [ 31.380070] vm_area_dup+0x20/0x160 [ 31.380574] __split_vma+0x170/0x950 [ 31.381089] split_vma+0xc6/0x110 [ 31.381575] mprotect_fixup+0x8d2/0xb30 [ 31.382125] do_mprotect_pkey+0x87e/0xd40 [ 31.382696] __x64_sys_mprotect+0x78/0xc0 [ 31.383272] do_syscall_64+0x3f/0x90 [ 31.383796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384515] [ 31.384749] Freed by task 214: [ 31.385183] kasan_save_stack+0x22/0x50 [ 31.385740] kasan_set_track+0x25/0x30 [ 31.386281] kasan_save_free_info+0x2b/0x50 [ 31.386869] __kasan_slab_free+0x10a/0x190 [ 31.387454] kmem_cache_free+0x10d/0x4d0 [ 31.388027] rcu_core+0x8c8/0x2860 [ 31.388511] __do_softirq+0x1b7/0x7d4 [ 31.389035] [ 31.389270] Last potentially related work creation: [ 31.389914] kasan_save_stack+0x22/0x50 [ 31.390466] __kasan_record_aux_stack+0x8e/0xa0 [ 31.391102] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.391802] remove_vma+0x139/0x170 [ 31.392312] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.392935] do_vmi_munmap+0x1f1/0x2b0 [ 31.393469] __vm_munmap+0x138/0x3a0 [ 31.393982] __x64_sys_munmap+0x59/0x80 [ 31.394531] do_syscall_64+0x3f/0x90 [ 31.395056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395762] [ 31.396008] The buggy address belongs to the object at ffff888016ac3ae0 [ 31.396008] which belongs to the cache vm_area_struct of size 168 [ 31.397625] The buggy address is located 88 bytes inside of [ 31.397625] freed 168-byte region [ffff888016ac3ae0, ffff888016ac3b88) [ 31.399161] [ 31.399400] The buggy address belongs to the physical page: [ 31.400146] page:0000000063eb8208 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ac3 [ 31.401347] memcg:ffff8880197bac01 [ 31.401818] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.402522] page_type: 0xffffffff() [ 31.403019] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.404048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197bac01 [ 31.405047] page dumped because: kasan: bad access detected [ 31.405772] [ 31.406018] Memory state around the buggy address: [ 31.406662] ffff888016ac3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.407601] ffff888016ac3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.408542] >ffff888016ac3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.409487] ^ [ 31.410158] ffff888016ac3b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.411097] ffff888016ac3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.412059] ================================================================== [ 31.413263] Disabling lock debugging due to kernel taint [ 33.818971] BUG: Bad rss-counter state mm:000000006981229f type:MM_FILEPAGES val:33 [ 33.820058] BUG: Bad rss-counter state mm:000000006981229f type:MM_ANONPAGES val:22 [ 34.359257] BUG: Bad rss-counter state mm:0000000035b5f807 type:MM_FILEPAGES val:33 [ 34.360313] BUG: Bad rss-counter state mm:0000000035b5f807 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34902' (ECDSA) to the list of known hosts. 2023/06/19 13:24:26 fuzzer started 2023/06/19 13:24:26 dialing manager at localhost:44161 2023/06/19 13:24:26 checking machine... 2023/06/19 13:24:26 checking revisions... [ 35.117854] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:24:26 testing simple program... [ 35.172249] cgroup: Unknown subsys name 'net' [ 35.234388] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:24:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=1ffff110028b5471 RSI=ffffffff8171ade1 RDI=ffff8880145aa388 RBP=0000000000000000 RSP=ffff888015c3fe78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000004000 R13=00007f7895ef6730 R14=ffff88800eb2c0f8 R15=0000000000000040 RIP=ffffffff8171ae01 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7896ac0900 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=00007f7895ef6730 CR3=000000000c952000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1e2cdef0cd6f2b6200000000000ae988 XMM05=d1929f644a35dc1c0000000000135388 XMM06=e4cb8bb95a7664b600000000001344d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000058 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000103f6 RSI=ffffffff821920cb RDI=0000000000000007 RBP=00000000000103f6 RSP=ffff88800a1af7c8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000103f6 R11=0000000000000128 R12=00000000000103f6 R13=ffff88800f3c01a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff821920cf RFL=00000093 [--S-A-C] 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=00007f390b3bf000 CR3=000000000ec8a000 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=58e472c0c15dfb82495b4c3f048d1abe XMM02=1b7da5ad5f0981b2db66a0d247190459 XMM03=2b386044416d0e5396b6ffb3d158658b XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01014a0666069001014a900101010101 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000