syzkaller login: [ 29.634385] BUG: Bad rss-counter state mm:000000007c3d1dac type:MM_FILEPAGES val:33 [ 29.635445] BUG: Bad rss-counter state mm:000000007c3d1dac type:MM_ANONPAGES val:22 [ 29.796644] ================================================================== [ 29.797557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.798533] Read of size 8 at addr ffff88800d78ec20 by task sshd/220 [ 29.799305] [ 29.799522] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.800562] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.801541] Call Trace: [ 29.801884] [ 29.802196] dump_stack_lvl+0x91/0xf0 [ 29.802684] print_report+0xcc/0x620 [ 29.803162] ? __virt_addr_valid+0x102/0x340 [ 29.803718] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.804336] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.804954] kasan_report+0xbe/0xf0 [ 29.805424] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.806055] vma_interval_tree_remove+0xc75/0xec0 [ 29.806655] vma_prepare+0xc54/0x11a0 [ 29.807139] __split_vma+0x5af/0x950 [ 29.807610] ? __pfx___split_vma+0x10/0x10 [ 29.808150] ? find_held_lock+0x2c/0x110 [ 29.808666] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.809235] ? lock_is_held_type+0x9f/0x120 [ 29.809800] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.810405] ? mtree_range_walk+0x632/0x900 [ 29.810954] ? mas_walk+0x5c7/0x7c0 [ 29.811423] do_vmi_munmap+0x1f1/0x2b0 [ 29.811910] mmap_region+0x1f9/0x2660 [ 29.812387] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.812897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.813614] ? __pfx_lock_acquire+0x10/0x10 [ 29.814159] ? __pfx_mmap_region+0x10/0x10 [ 29.814682] ? security_mmap_addr+0x7d/0xa0 [ 29.815227] ? get_unmapped_area+0x1f5/0x3f0 [ 29.815776] do_mmap+0x854/0xf00 [ 29.816224] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.816718] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.817273] ksys_mmap_pgoff+0x3af/0x500 [ 29.817780] do_syscall_64+0x3f/0x90 [ 29.818262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.818913] RIP: 0033:0x7fc13600dd82 [ 29.819371] 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 [ 29.821470] RSP: 002b:00007fffc5081a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.822387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc13600dd82 [ 29.823235] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc135447000 [ 29.824074] RBP: 00007fc135447000 R08: 0000000000000009 R09: 0000000000001000 [ 29.824915] R10: 0000000000000812 R11: 0000000000000206 R12: 000056276ceb4b20 [ 29.825752] R13: 00007fffc5081a60 R14: 00007fffc5081a90 R15: 00007fffc5081df0 [ 29.826613] [ 29.826905] [ 29.827122] Allocated by task 213: [ 29.827548] kasan_save_stack+0x22/0x50 [ 29.828049] kasan_set_track+0x25/0x30 [ 29.828540] __kasan_slab_alloc+0x59/0x70 [ 29.829064] kmem_cache_alloc+0x16b/0x370 [ 29.829580] vm_area_dup+0x20/0x160 [ 29.830054] __split_vma+0x170/0x950 [ 29.830523] split_vma+0xc6/0x110 [ 29.830970] mprotect_fixup+0x8d2/0xb30 [ 29.831465] do_mprotect_pkey+0x87e/0xd40 [ 29.831995] __x64_sys_mprotect+0x78/0xc0 [ 29.832521] do_syscall_64+0x3f/0x90 [ 29.832994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.833644] [ 29.833867] Freed by task 213: [ 29.834253] kasan_save_stack+0x22/0x50 [ 29.834756] kasan_set_track+0x25/0x30 [ 29.835253] kasan_save_free_info+0x2b/0x50 [ 29.835783] __kasan_slab_free+0x10a/0x190 [ 29.836312] kmem_cache_free+0x10d/0x4d0 [ 29.836818] rcu_core+0x8c8/0x2860 [ 29.837264] __do_softirq+0x1b7/0x7d4 [ 29.837738] [ 29.837963] Last potentially related work creation: [ 29.838543] kasan_save_stack+0x22/0x50 [ 29.839043] __kasan_record_aux_stack+0x8e/0xa0 [ 29.839623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.840258] remove_vma+0x139/0x170 [ 29.840706] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.841351] do_vmi_munmap+0x1f1/0x2b0 [ 29.841841] __vm_munmap+0x138/0x3a0 [ 29.842303] __x64_sys_munmap+0x59/0x80 [ 29.842794] do_syscall_64+0x3f/0x90 [ 29.843266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.843898] [ 29.844115] The buggy address belongs to the object at ffff88800d78ebc8 [ 29.844115] which belongs to the cache vm_area_struct of size 168 [ 29.845571] The buggy address is located 88 bytes inside of [ 29.845571] freed 168-byte region [ffff88800d78ebc8, ffff88800d78ec70) [ 29.846967] [ 29.847183] The buggy address belongs to the physical page: [ 29.847831] page:0000000009953ead refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd78e [ 29.848900] memcg:ffff88800d8d2b01 [ 29.849352] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.850061] page_type: 0xffffffff() [ 29.850522] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a83c0 dead000000000003 [ 29.851436] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8d2b01 [ 29.852334] page dumped because: kasan: bad access detected [ 29.852998] [ 29.853215] Memory state around the buggy address: [ 29.853794] ffff88800d78eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.854653] ffff88800d78eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.855519] >ffff88800d78ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.856393] ^ [ 29.856920] ffff88800d78ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.857804] ffff88800d78ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.858680] ================================================================== [ 29.859610] Disabling lock debugging due to kernel taint [ 32.126571] BUG: Bad rss-counter state mm:00000000a6e37ea8 type:MM_FILEPAGES val:33 [ 32.127708] BUG: Bad rss-counter state mm:00000000a6e37ea8 type:MM_ANONPAGES val:22 [ 32.608102] BUG: Bad rss-counter state mm:00000000cdcfe59f type:MM_FILEPAGES val:33 [ 32.609082] BUG: Bad rss-counter state mm:00000000cdcfe59f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48872' (ECDSA) to the list of known hosts. 2023/06/21 02:22:31 fuzzer started 2023/06/21 02:22:31 dialing manager at localhost:36067 2023/06/21 02:22:31 checking machine... 2023/06/21 02:22:31 checking revisions... [ 33.307985] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:22:31 testing simple program... [ 33.356247] cgroup: Unknown subsys name 'net' [ 33.392557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:22:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015c3f4a8 RCX=0000000000000001 RDX=1ffff11002b87e97 RSI=ffff888015c3ff20 RDI=ffff888015c3f4b8 RBP=ffff888015c3ff20 RSP=ffff888015c3f400 R8 =ffffffff86099296 R9 =ffff888015c3f4e8 R10=0000000000038001 R11=0000000000006397 R12=0000000000000008 R13=ffff888015c38000 R14=ffff888015c3ff28 R15=ffff888015c3f4a8 RIP=ffffffff8113046e 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 00007f90517c7900 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=00007f9050c3e880 CR3=000000000f74c000 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=433d1383797427ef00000000000ae988 XMM05=1a2cfee7325fa00c00000000001326f8 XMM06=4fda316b135da52b0000000000131798 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888009b58f54 RBX=0000000000000008 RCX=0000000000000000 RDX=0000000000000001 RSI=ffff888015d674f0 RDI=ffff888009b58f54 RBP=ffff8880168b6000 RSP=ffff888015d67468 R8 =0000000000000003 R9 =0000000000000005 R10=ffff888009b58f55 R11=00000b6300000996 R12=0000000000000000 R13=000000000000000b R14=ffff888015d674f0 R15=0000000000000f70 RIP=ffffffff84513163 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 00007fd9eb52a900 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=00007ffd5531b000 CR3=0000000014674000 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