syzkaller login: [ 29.584524] BUG: Bad rss-counter state mm:00000000df28f2fa type:MM_FILEPAGES val:33 [ 29.586344] BUG: Bad rss-counter state mm:00000000df28f2fa type:MM_ANONPAGES val:22 [ 29.792442] ================================================================== [ 29.793195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.793955] Read of size 8 at addr ffff888019d8b228 by task sshd/221 [ 29.794521] [ 29.794702] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.795407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.796156] Call Trace: [ 29.796485] [ 29.796857] dump_stack_lvl+0x91/0xf0 [ 29.797742] print_report+0xcc/0x620 [ 29.798373] ? __virt_addr_valid+0x102/0x340 [ 29.799119] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.799896] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.800550] kasan_report+0xbe/0xf0 [ 29.800942] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.801410] vma_interval_tree_remove+0xc75/0xec0 [ 29.801867] vma_prepare+0xc54/0x11a0 [ 29.802231] __split_vma+0x5af/0x950 [ 29.802591] ? __pfx___split_vma+0x10/0x10 [ 29.803001] ? find_held_lock+0x2c/0x110 [ 29.803423] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.803859] ? lock_is_held_type+0x9f/0x120 [ 29.804236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.804732] ? mtree_range_walk+0x632/0x900 [ 29.805148] ? mas_walk+0x5c7/0x7c0 [ 29.805503] do_vmi_munmap+0x1f1/0x2b0 [ 29.805892] mmap_region+0x1f9/0x2660 [ 29.806278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.806688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.807246] ? __pfx_lock_acquire+0x10/0x10 [ 29.807658] ? __pfx_mmap_region+0x10/0x10 [ 29.808067] ? security_mmap_addr+0x7d/0xa0 [ 29.808440] ? get_unmapped_area+0x1f5/0x3f0 [ 29.808855] do_mmap+0x854/0xf00 [ 29.809200] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.809575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.810028] ksys_mmap_pgoff+0x3af/0x500 [ 29.810422] do_syscall_64+0x3f/0x90 [ 29.810778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.811271] RIP: 0033:0x7f9cbb211d82 [ 29.811648] 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 [ 29.813292] RSP: 002b:00007fff07af02e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.813979] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cbb211d82 [ 29.814623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cba64b000 [ 29.815279] RBP: 00007f9cba64b000 R08: 0000000000000009 R09: 0000000000001000 [ 29.815931] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bce4fb9ec0 [ 29.816589] R13: 00007fff07af0300 R14: 00007fff07af0330 R15: 00007fff07af0690 [ 29.817249] [ 29.817466] [ 29.817638] Allocated by task 212: [ 29.817975] kasan_save_stack+0x22/0x50 [ 29.818388] kasan_set_track+0x25/0x30 [ 29.818762] __kasan_slab_alloc+0x59/0x70 [ 29.819126] kmem_cache_alloc+0x16b/0x370 [ 29.819496] vm_area_dup+0x20/0x160 [ 29.819854] __split_vma+0x170/0x950 [ 29.820215] split_vma+0xc6/0x110 [ 29.820527] mprotect_fixup+0x8d2/0xb30 [ 29.820900] do_mprotect_pkey+0x87e/0xd40 [ 29.821301] __x64_sys_mprotect+0x78/0xc0 [ 29.821671] do_syscall_64+0x3f/0x90 [ 29.822016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.822502] [ 29.822655] Freed by task 212: [ 29.822945] kasan_save_stack+0x22/0x50 [ 29.823307] kasan_set_track+0x25/0x30 [ 29.823681] kasan_save_free_info+0x2b/0x50 [ 29.824109] __kasan_slab_free+0x10a/0x190 [ 29.824537] kmem_cache_free+0x10d/0x4d0 [ 29.824937] rcu_core+0x8c8/0x2860 [ 29.825280] __do_softirq+0x1b7/0x7d4 [ 29.825638] [ 29.825799] Last potentially related work creation: [ 29.826196] kasan_save_stack+0x22/0x50 [ 29.826581] __kasan_record_aux_stack+0x8e/0xa0 [ 29.827018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.827471] remove_vma+0x139/0x170 [ 29.827815] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.828237] do_vmi_munmap+0x1f1/0x2b0 [ 29.828563] __vm_munmap+0x138/0x3a0 [ 29.828876] __x64_sys_munmap+0x59/0x80 [ 29.829201] do_syscall_64+0x3f/0x90 [ 29.829535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.829972] [ 29.830125] The buggy address belongs to the object at ffff888019d8b1d0 [ 29.830125] which belongs to the cache vm_area_struct of size 168 [ 29.831214] The buggy address is located 88 bytes inside of [ 29.831214] freed 168-byte region [ffff888019d8b1d0, ffff888019d8b278) [ 29.832308] [ 29.832475] The buggy address belongs to the physical page: [ 29.832958] page:00000000873f5127 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d8b [ 29.833777] memcg:ffff88800e86f801 [ 29.834082] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.834570] page_type: 0xffffffff() [ 29.834883] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.835603] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e86f801 [ 29.836315] page dumped because: kasan: bad access detected [ 29.836787] [ 29.836930] Memory state around the buggy address: [ 29.837336] ffff888019d8b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.837980] ffff888019d8b180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.838621] >ffff888019d8b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.839414] ^ [ 29.839866] ffff888019d8b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.840534] ffff888019d8b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.841198] ================================================================== [ 29.841858] Disabling lock debugging due to kernel taint [ 32.273857] BUG: Bad rss-counter state mm:0000000033d0e9c1 type:MM_FILEPAGES val:33 [ 32.275036] BUG: Bad rss-counter state mm:0000000033d0e9c1 type:MM_ANONPAGES val:22 [ 32.661567] BUG: Bad rss-counter state mm:000000006ae56541 type:MM_FILEPAGES val:33 [ 32.662925] BUG: Bad rss-counter state mm:000000006ae56541 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5597' (ECDSA) to the list of known hosts. 2023/06/19 14:43:31 fuzzer started 2023/06/19 14:43:31 dialing manager at localhost:44161 2023/06/19 14:43:31 checking machine... 2023/06/19 14:43:31 checking revisions... [ 33.412010] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:43:31 testing simple program... [ 33.458577] cgroup: Unknown subsys name 'net' [ 33.543673] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:43:30 Registers: info registers vcpu 0 RAX=1ffffffff0bbf9e3 RBX=ffffffff85dfcf18 RCX=ffffffff8180ee7d RDX=0000000000000000 RSI=ffffffff86137cac RDI=ffffffff85dfcf14 RBP=ffffffff85dfcf18 RSP=ffff888016de74c8 R8 =ffffffff86137cac R9 =ffff888016de75c0 R10=0000000000038001 R11=0000000000020ed0 R12=ffffffff85dfcf18 R13=ffffffff85dfcf14 R14=ffffffff85dfcf14 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fdd31e6d700 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=00007f0186d5a4a0 CR3=000000000e638000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36313635342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363136 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09a92 RSP=ffff88806cf099e0 R8 =ffffffff864bb032 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88801c0c77d8 R15=ffff88806cf09a50 RIP=ffffffff81131928 RFL=00000297 [--S-APC] 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 00007f5877d6d900 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=00007ffc1cdd8000 CR3=000000000cb5c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000