syzkaller login: [ 47.207584] BUG: Bad rss-counter state mm:0000000082b83bc4 type:MM_FILEPAGES val:33 [ 47.208341] BUG: Bad rss-counter state mm:0000000082b83bc4 type:MM_ANONPAGES val:22 [ 47.332445] ================================================================== [ 47.333348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.334280] Read of size 8 at addr ffff88801a138c20 by task sshd/221 [ 47.335040] [ 47.335258] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.336256] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.337223] Call Trace: [ 47.337543] [ 47.337829] dump_stack_lvl+0x91/0xf0 [ 47.338317] print_report+0xcc/0x620 [ 47.338801] ? __virt_addr_valid+0x102/0x340 [ 47.339352] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.339992] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.340610] kasan_report+0xbe/0xf0 [ 47.341098] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.341716] vma_interval_tree_remove+0xc75/0xec0 [ 47.342316] vma_prepare+0xc54/0x11a0 [ 47.342792] __split_vma+0x5af/0x950 [ 47.343261] ? __pfx___split_vma+0x10/0x10 [ 47.343801] ? find_held_lock+0x2c/0x110 [ 47.344315] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.344880] ? lock_is_held_type+0x9f/0x120 [ 47.345423] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.346024] ? mtree_range_walk+0x632/0x900 [ 47.346586] ? mas_walk+0x5c7/0x7c0 [ 47.347054] do_vmi_munmap+0x1f1/0x2b0 [ 47.347556] mmap_region+0x1f9/0x2660 [ 47.348045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.348558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.349279] ? __pfx_lock_acquire+0x10/0x10 [ 47.349805] ? __pfx_mmap_region+0x10/0x10 [ 47.350329] ? security_mmap_addr+0x7d/0xa0 [ 47.350862] ? get_unmapped_area+0x1f5/0x3f0 [ 47.351426] do_mmap+0x854/0xf00 [ 47.351863] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.352353] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.352916] ksys_mmap_pgoff+0x3af/0x500 [ 47.353427] do_syscall_64+0x3f/0x90 [ 47.353903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.354544] RIP: 0033:0x7f22af28ed82 [ 47.355002] 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 [ 47.357117] RSP: 002b:00007fff6f1c3b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.358011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22af28ed82 [ 47.358858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22ae6c8000 [ 47.359731] RBP: 00007f22ae6c8000 R08: 0000000000000009 R09: 0000000000001000 [ 47.360576] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e740fe4d90 [ 47.361419] R13: 00007fff6f1c3b60 R14: 00007fff6f1c3b90 R15: 00007fff6f1c3ef0 [ 47.362274] [ 47.362566] [ 47.362782] Allocated by task 214: [ 47.363214] kasan_save_stack+0x22/0x50 [ 47.363728] kasan_set_track+0x25/0x30 [ 47.364221] __kasan_slab_alloc+0x59/0x70 [ 47.364741] kmem_cache_alloc+0x16b/0x370 [ 47.365257] vm_area_dup+0x20/0x160 [ 47.365722] __split_vma+0x170/0x950 [ 47.366187] split_vma+0xc6/0x110 [ 47.366622] mprotect_fixup+0x8d2/0xb30 [ 47.367124] do_mprotect_pkey+0x87e/0xd40 [ 47.367652] __x64_sys_mprotect+0x78/0xc0 [ 47.368179] do_syscall_64+0x3f/0x90 [ 47.368664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.369312] [ 47.369530] Freed by task 214: [ 47.369922] kasan_save_stack+0x22/0x50 [ 47.370421] kasan_set_track+0x25/0x30 [ 47.370909] kasan_save_free_info+0x2b/0x50 [ 47.371469] __kasan_slab_free+0x10a/0x190 [ 47.371994] kmem_cache_free+0x10d/0x4d0 [ 47.372502] rcu_core+0x8c8/0x2860 [ 47.372943] __do_softirq+0x1b7/0x7d4 [ 47.373414] [ 47.373632] Last potentially related work creation: [ 47.374237] kasan_save_stack+0x22/0x50 [ 47.374737] __kasan_record_aux_stack+0x8e/0xa0 [ 47.375314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.375958] remove_vma+0x139/0x170 [ 47.376404] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.376957] do_vmi_munmap+0x1f1/0x2b0 [ 47.377435] __vm_munmap+0x138/0x3a0 [ 47.377899] __x64_sys_munmap+0x59/0x80 [ 47.378397] do_syscall_64+0x3f/0x90 [ 47.378861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.379508] [ 47.379722] The buggy address belongs to the object at ffff88801a138bc8 [ 47.379722] which belongs to the cache vm_area_struct of size 168 [ 47.381172] The buggy address is located 88 bytes inside of [ 47.381172] freed 168-byte region [ffff88801a138bc8, ffff88801a138c70) [ 47.382562] [ 47.382777] The buggy address belongs to the physical page: [ 47.383445] page:000000006ae9c55e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a138 [ 47.384536] memcg:ffff88801963c701 [ 47.384955] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.385607] page_type: 0xffffffff() [ 47.386052] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.386978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801963c701 [ 47.387941] page dumped because: kasan: bad access detected [ 47.388637] [ 47.388864] Memory state around the buggy address: [ 47.389466] ffff88801a138b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.390359] ffff88801a138b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 47.391235] >ffff88801a138c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 47.392095] ^ [ 47.392630] ffff88801a138c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 47.393495] ffff88801a138d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 47.394343] ================================================================== [ 47.395311] Disabling lock debugging due to kernel taint [ 49.586681] BUG: Bad rss-counter state mm:0000000097d70d59 type:MM_FILEPAGES val:33 [ 49.587660] BUG: Bad rss-counter state mm:0000000097d70d59 type:MM_ANONPAGES val:22 [ 50.151240] BUG: Bad rss-counter state mm:00000000f50a4fb9 type:MM_FILEPAGES val:33 [ 50.152244] BUG: Bad rss-counter state mm:00000000f50a4fb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11393' (ECDSA) to the list of known hosts. 2023/06/20 06:37:37 fuzzer started 2023/06/20 06:37:38 dialing manager at localhost:44161 2023/06/20 06:37:38 checking machine... 2023/06/20 06:37:38 checking revisions... [ 50.776891] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:37:38 testing simple program... [ 50.824761] cgroup: Unknown subsys name 'net' [ 50.869296] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:37:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88806ce099c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888008deb000 RIP=ffffffff812d8614 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 0000000000000000 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=00007ffc89d85468 CR3=000000000e9f0000 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=2037333a37333a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a37333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8182d976 RDI=ffffe8ffffd14868 RBP=ffff88800faa2000 RSP=ffff88800feb79f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000001 R13=ffff888008deb000 R14=0000000000000dc0 R15=ffff88800faa2000 RIP=ffffffff814c07f7 RFL=00000046 [---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 00007f061d678900 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=00007f061dc300b0 CR3=0000000016cea000 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=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