syzkaller login: [ 31.592508] BUG: Bad rss-counter state mm:00000000eb58f5a2 type:MM_FILEPAGES val:33 [ 31.593341] BUG: Bad rss-counter state mm:00000000eb58f5a2 type:MM_ANONPAGES val:22 [ 31.722135] ================================================================== [ 31.722794] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.723396] Read of size 8 at addr ffff88801984eb38 by task sshd/219 [ 31.723901] [ 31.724043] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.724657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.725310] Call Trace: [ 31.725528] <TASK> [ 31.725715] dump_stack_lvl+0x91/0xf0 [ 31.726235] print_report+0xcc/0x620 [ 31.726551] ? __virt_addr_valid+0x102/0x340 [ 31.726912] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.727309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.727709] kasan_report+0xbe/0xf0 [ 31.728053] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.728500] vma_interval_tree_remove+0xc75/0xec0 [ 31.728936] vma_prepare+0xc54/0x11a0 [ 31.729270] __split_vma+0x5af/0x950 [ 31.729599] ? __pfx___split_vma+0x10/0x10 [ 31.730054] ? find_held_lock+0x2c/0x110 [ 31.730472] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.730870] ? lock_is_held_type+0x9f/0x120 [ 31.731259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.731672] ? mtree_range_walk+0x632/0x900 [ 31.732063] ? mas_walk+0x5c7/0x7c0 [ 31.732393] do_vmi_munmap+0x1f1/0x2b0 [ 31.732828] mmap_region+0x1f9/0x2660 [ 31.733294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.733700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.734221] ? __pfx_lock_acquire+0x10/0x10 [ 31.734580] ? __pfx_mmap_region+0x10/0x10 [ 31.734953] ? security_mmap_addr+0x7d/0xa0 [ 31.735310] ? get_unmapped_area+0x1f5/0x3f0 [ 31.735719] do_mmap+0x854/0xf00 [ 31.736042] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.736424] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.736812] ksys_mmap_pgoff+0x3af/0x500 [ 31.737136] do_syscall_64+0x3f/0x90 [ 31.737448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.737913] RIP: 0033:0x7f57e270dd82 [ 31.738320] 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 [ 31.739814] RSP: 002b:00007ffef824d8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.740419] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57e270dd82 [ 31.740996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57e1b47000 [ 31.741543] RBP: 00007f57e1b47000 R08: 0000000000000009 R09: 0000000000001000 [ 31.742160] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc41cffec0 [ 31.742721] R13: 00007ffef824d910 R14: 00007ffef824d940 R15: 00007ffef824dca0 [ 31.743279] </TASK> [ 31.743465] [ 31.743601] Allocated by task 212: [ 31.743900] kasan_save_stack+0x22/0x50 [ 31.744249] kasan_set_track+0x25/0x30 [ 31.744567] __kasan_slab_alloc+0x59/0x70 [ 31.744918] kmem_cache_alloc+0x16b/0x370 [ 31.745258] vm_area_dup+0x20/0x160 [ 31.745565] __split_vma+0x170/0x950 [ 31.745868] split_vma+0xc6/0x110 [ 31.746184] mprotect_fixup+0x8d2/0xb30 [ 31.746499] do_mprotect_pkey+0x87e/0xd40 [ 31.746871] __x64_sys_mprotect+0x78/0xc0 [ 31.747203] do_syscall_64+0x3f/0x90 [ 31.747502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.747924] [ 31.748068] Freed by task 212: [ 31.748337] kasan_save_stack+0x22/0x50 [ 31.748686] kasan_set_track+0x25/0x30 [ 31.749039] kasan_save_free_info+0x2b/0x50 [ 31.749383] __kasan_slab_free+0x10a/0x190 [ 31.749725] kmem_cache_free+0x10d/0x4d0 [ 31.750086] rcu_core+0x8c8/0x2860 [ 31.750375] __do_softirq+0x1b7/0x7d4 [ 31.750704] [ 31.750863] Last potentially related work creation: [ 31.751238] kasan_save_stack+0x22/0x50 [ 31.751562] __kasan_record_aux_stack+0x8e/0xa0 [ 31.752052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.752597] remove_vma+0x139/0x170 [ 31.752956] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.753390] do_vmi_munmap+0x1f1/0x2b0 [ 31.753736] __vm_munmap+0x138/0x3a0 [ 31.754119] __x64_sys_munmap+0x59/0x80 [ 31.754449] do_syscall_64+0x3f/0x90 [ 31.754766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755219] [ 31.755368] The buggy address belongs to the object at ffff88801984eae0 [ 31.755368] which belongs to the cache vm_area_struct of size 168 [ 31.756351] The buggy address is located 88 bytes inside of [ 31.756351] freed 168-byte region [ffff88801984eae0, ffff88801984eb88) [ 31.757369] [ 31.757536] The buggy address belongs to the physical page: [ 31.758098] page:00000000fb6a3758 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1984e [ 31.758828] memcg:ffff888019afbf01 [ 31.759098] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.759514] page_type: 0xffffffff() [ 31.759820] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.760419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019afbf01 [ 31.760990] page dumped because: kasan: bad access detected [ 31.761412] [ 31.761546] Memory state around the buggy address: [ 31.761930] ffff88801984ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.762553] ffff88801984ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.763100] >ffff88801984eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.763647] ^ [ 31.764038] ffff88801984eb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.764657] ffff88801984ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.765182] ================================================================== [ 31.766010] Disabling lock debugging due to kernel taint [ 33.565380] BUG: Bad rss-counter state mm:000000006663b8a1 type:MM_FILEPAGES val:33 [ 33.566168] BUG: Bad rss-counter state mm:000000006663b8a1 type:MM_ANONPAGES val:22 [ 34.002207] BUG: Bad rss-counter state mm:000000005c78fcab type:MM_FILEPAGES val:33 [ 34.002982] BUG: Bad rss-counter state mm:000000005c78fcab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36098' (ECDSA) to the list of known hosts. 2023/06/21 08:54:29 fuzzer started 2023/06/21 08:54:29 dialing manager at localhost:36067 2023/06/21 08:54:29 checking machine... 2023/06/21 08:54:29 checking revisions... [ 34.524599] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:54:29 testing simple program... [ 34.557664] cgroup: Unknown subsys name 'net' [ 34.591134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:54:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000055 RCX=0000000000000000 RDX=0000000080000000 RSI=0000000000000055 RDI=0000000000000000 RBP=0000000000000055 RSP=ffff888017d5fac8 R8 =0000000000000006 R9 =0000000000000055 R10=0000000000000055 R11=00000000000b6a61 R12=0000000000000055 R13=ffff8880196c8ec0 R14=ffffffff8493c440 R15=0000000000000b24 RIP=ffffffff814c0434 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 00007f8bba249700 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=00007fb0eb91f650 CR3=000000000f0c6000 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=2039323a34353a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a34353a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fb0eb269000 CR3=000000000f0c6000 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=34353a3830203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039323a3435 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000