syzkaller login: [ 30.074101] BUG: Bad rss-counter state mm:00000000398c2ff2 type:MM_FILEPAGES val:33 [ 30.075150] BUG: Bad rss-counter state mm:00000000398c2ff2 type:MM_ANONPAGES val:22 [ 30.234279] ================================================================== [ 30.235380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.236527] Read of size 8 at addr ffff88801690c968 by task sshd/219 [ 30.237666] [ 30.237888] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.238750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.239723] Call Trace: [ 30.240039] [ 30.240321] dump_stack_lvl+0x91/0xf0 [ 30.240812] print_report+0xcc/0x620 [ 30.241296] ? __virt_addr_valid+0x102/0x340 [ 30.241856] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.242469] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.243077] kasan_report+0xbe/0xf0 [ 30.243555] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.244176] vma_interval_tree_remove+0xc75/0xec0 [ 30.244771] vma_prepare+0xc54/0x11a0 [ 30.245245] __split_vma+0x5af/0x950 [ 30.245719] ? __pfx___split_vma+0x10/0x10 [ 30.246247] ? find_held_lock+0x2c/0x110 [ 30.246764] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.247331] ? lock_is_held_type+0x9f/0x120 [ 30.247864] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.248465] ? mtree_range_walk+0x632/0x900 [ 30.249016] ? mas_walk+0x5c7/0x7c0 [ 30.249507] do_vmi_munmap+0x1f1/0x2b0 [ 30.249998] mmap_region+0x1f9/0x2660 [ 30.250473] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.250980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.251690] ? __pfx_lock_acquire+0x10/0x10 [ 30.252214] ? __pfx_mmap_region+0x10/0x10 [ 30.252742] ? security_mmap_addr+0x7d/0xa0 [ 30.253267] ? get_unmapped_area+0x1f5/0x3f0 [ 30.253825] do_mmap+0x854/0xf00 [ 30.254262] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.254750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.255315] ksys_mmap_pgoff+0x3af/0x500 [ 30.255819] do_syscall_64+0x3f/0x90 [ 30.256299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.256935] RIP: 0033:0x7f5ed3638d82 [ 30.257387] 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 [ 30.259499] RSP: 002b:00007ffdf5ef1ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.260391] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ed3638d82 [ 30.261236] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ed2a72000 [ 30.262111] RBP: 00007f5ed2a72000 R08: 0000000000000009 R09: 0000000000001000 [ 30.262953] R10: 0000000000000812 R11: 0000000000000206 R12: 00005653fceaef70 [ 30.263795] R13: 00007ffdf5ef1cc0 R14: 00007ffdf5ef1cf0 R15: 00007ffdf5ef2050 [ 30.264650] [ 30.264945] [ 30.265162] Allocated by task 212: [ 30.265614] kasan_save_stack+0x22/0x50 [ 30.266121] kasan_set_track+0x25/0x30 [ 30.266611] __kasan_slab_alloc+0x59/0x70 [ 30.267139] kmem_cache_alloc+0x16b/0x370 [ 30.267656] vm_area_dup+0x20/0x160 [ 30.268111] __split_vma+0x170/0x950 [ 30.268582] split_vma+0xc6/0x110 [ 30.269019] mprotect_fixup+0x8d2/0xb30 [ 30.269547] do_mprotect_pkey+0x87e/0xd40 [ 30.270066] __x64_sys_mprotect+0x78/0xc0 [ 30.270580] do_syscall_64+0x3f/0x90 [ 30.271072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.271718] [ 30.271937] Freed by task 212: [ 30.272331] kasan_save_stack+0x22/0x50 [ 30.272837] kasan_set_track+0x25/0x30 [ 30.273333] kasan_save_free_info+0x2b/0x50 [ 30.273893] __kasan_slab_free+0x10a/0x190 [ 30.274421] kmem_cache_free+0x10d/0x4d0 [ 30.274945] rcu_core+0x8c8/0x2860 [ 30.275389] __do_softirq+0x1b7/0x7d4 [ 30.275901] [ 30.276126] Last potentially related work creation: [ 30.276709] kasan_save_stack+0x22/0x50 [ 30.277217] __kasan_record_aux_stack+0x8e/0xa0 [ 30.277845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.278596] remove_vma+0x139/0x170 [ 30.279074] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.279655] do_vmi_munmap+0x1f1/0x2b0 [ 30.280169] __vm_munmap+0x138/0x3a0 [ 30.280660] __x64_sys_munmap+0x59/0x80 [ 30.281189] do_syscall_64+0x3f/0x90 [ 30.281716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.282397] [ 30.282617] The buggy address belongs to the object at ffff88801690c910 [ 30.282617] which belongs to the cache vm_area_struct of size 168 [ 30.284166] The buggy address is located 88 bytes inside of [ 30.284166] freed 168-byte region [ffff88801690c910, ffff88801690c9b8) [ 30.285674] [ 30.285900] The buggy address belongs to the physical page: [ 30.286593] page:00000000840397a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1690c [ 30.287729] memcg:ffff8880159ad001 [ 30.288179] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.288869] page_type: 0xffffffff() [ 30.289326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.290289] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159ad001 [ 30.291195] page dumped because: kasan: bad access detected [ 30.291855] [ 30.292069] Memory state around the buggy address: [ 30.292664] ffff88801690c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.293547] ffff88801690c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.294404] >ffff88801690c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.295264] ^ [ 30.296061] ffff88801690c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.296920] ffff88801690ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.297789] ================================================================== [ 30.298721] Disabling lock debugging due to kernel taint [ 32.435718] BUG: Bad rss-counter state mm:00000000cf00dbc0 type:MM_FILEPAGES val:33 [ 32.436697] BUG: Bad rss-counter state mm:00000000cf00dbc0 type:MM_ANONPAGES val:22 [ 32.930988] BUG: Bad rss-counter state mm:00000000897732f8 type:MM_FILEPAGES val:33 [ 32.932224] BUG: Bad rss-counter state mm:00000000897732f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56151' (ECDSA) to the list of known hosts. 2023/06/20 13:08:31 fuzzer started 2023/06/20 13:08:31 dialing manager at localhost:36067 2023/06/20 13:08:31 checking machine... 2023/06/20 13:08:31 checking revisions... [ 33.665687] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:08:32 testing simple program... [ 33.716316] cgroup: Unknown subsys name 'net' [ 33.776198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:08:31 Registers: info registers vcpu 0 RAX=1ffffffff0c09ebd RBX=ffffffff8604f5e8 RCX=ffffffff8451105d RDX=0000000000000000 RSI=ffffffff864b2f26 RDI=ffffffff8604f5d8 RBP=ffffffff8604f5e8 RSP=ffff88806ce099e0 R8 =ffffffff864b2f26 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffffffff8604f5e8 R13=ffffffff8604f5d8 R14=ffffffff8604f5e4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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=00007f860f6ddd70 CR3=000000000e7e6000 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=2031333a38303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a38303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801690c5b0 RCX=0000000000000000 RDX=1ffff11002d218af RSI=ffffffff816e7516 RDI=ffff88801690c570 RBP=dffffc0000000000 RSP=ffff88800cb57998 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88801690c5b0 R11=0000000000000000 R12=00007f827a7f2000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff816e754c 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 00007f6470051900 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=00007f6470020008 CR3=000000001a3c6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000