syzkaller login: [ 39.046511] BUG: Bad rss-counter state mm:00000000835a81e5 type:MM_FILEPAGES val:33 [ 39.047484] BUG: Bad rss-counter state mm:00000000835a81e5 type:MM_ANONPAGES val:22 [ 39.083574] ================================================================== [ 39.084660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.085804] Read of size 8 at addr ffff88800fc53ed8 by task sshd/224 [ 39.086806] [ 39.087074] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.088130] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.089338] Call Trace: [ 39.089733] [ 39.090105] dump_stack_lvl+0x91/0xf0 [ 39.090708] print_report+0xcc/0x620 [ 39.091312] ? __virt_addr_valid+0x102/0x340 [ 39.091990] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.092754] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.093514] kasan_report+0xbe/0xf0 [ 39.094105] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.094871] vma_interval_tree_remove+0xc75/0xec0 [ 39.095614] vma_prepare+0xc54/0x11a0 [ 39.096195] __split_vma+0x5af/0x950 [ 39.096777] ? __pfx___split_vma+0x10/0x10 [ 39.097434] ? find_held_lock+0x2c/0x110 [ 39.098089] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.098792] ? lock_is_held_type+0x9f/0x120 [ 39.099459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.100203] ? mtree_range_walk+0x632/0x900 [ 39.100881] ? mas_walk+0x5c7/0x7c0 [ 39.101470] do_vmi_munmap+0x1f1/0x2b0 [ 39.102099] mmap_region+0x1f9/0x2660 [ 39.102693] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.103330] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.104218] ? __pfx_lock_acquire+0x10/0x10 [ 39.104876] ? __pfx_mmap_region+0x10/0x10 [ 39.105532] ? security_mmap_addr+0x7d/0xa0 [ 39.106208] ? get_unmapped_area+0x1f5/0x3f0 [ 39.106879] do_mmap+0x854/0xf00 [ 39.107417] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.108020] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.108710] ksys_mmap_pgoff+0x3af/0x500 [ 39.109347] do_syscall_64+0x3f/0x90 [ 39.109924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.110740] RIP: 0033:0x7f788bc77d82 [ 39.111295] 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 [ 39.113939] RSP: 002b:00007ffff2421768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.115084] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f788bc77d82 [ 39.116139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f788b0b1000 [ 39.117193] RBP: 00007f788b0b1000 R08: 0000000000000009 R09: 0000000000001000 [ 39.118267] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eac378ef70 [ 39.119332] R13: 00007ffff2421780 R14: 00007ffff24217b0 R15: 00007ffff2421b10 [ 39.120401] [ 39.120769] [ 39.121028] Allocated by task 217: [ 39.121550] kasan_save_stack+0x22/0x50 [ 39.122182] kasan_set_track+0x25/0x30 [ 39.122792] __kasan_slab_alloc+0x59/0x70 [ 39.123428] kmem_cache_alloc+0x16b/0x370 [ 39.124058] vm_area_dup+0x20/0x160 [ 39.124611] __split_vma+0x170/0x950 [ 39.125178] split_vma+0xc6/0x110 [ 39.125708] mprotect_fixup+0x8d2/0xb30 [ 39.126334] do_mprotect_pkey+0x87e/0xd40 [ 39.126974] __x64_sys_mprotect+0x78/0xc0 [ 39.127615] do_syscall_64+0x3f/0x90 [ 39.128199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.128996] [ 39.129261] Freed by task 217: [ 39.129744] kasan_save_stack+0x22/0x50 [ 39.130367] kasan_set_track+0x25/0x30 [ 39.130970] kasan_save_free_info+0x2b/0x50 [ 39.131619] __kasan_slab_free+0x10a/0x190 [ 39.132265] kmem_cache_free+0x10d/0x4d0 [ 39.132891] rcu_core+0x8c8/0x2860 [ 39.133434] __do_softirq+0x1b7/0x7d4 [ 39.134031] [ 39.134298] Last potentially related work creation: [ 39.135025] kasan_save_stack+0x22/0x50 [ 39.135647] __kasan_record_aux_stack+0x8e/0xa0 [ 39.136353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.137145] remove_vma+0x139/0x170 [ 39.137687] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.138372] do_vmi_munmap+0x1f1/0x2b0 [ 39.138970] __vm_munmap+0x138/0x3a0 [ 39.139550] __x64_sys_munmap+0x59/0x80 [ 39.140167] do_syscall_64+0x3f/0x90 [ 39.140750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.141536] [ 39.141800] The buggy address belongs to the object at ffff88800fc53e80 [ 39.141800] which belongs to the cache vm_area_struct of size 168 [ 39.143644] The buggy address is located 88 bytes inside of [ 39.143644] freed 168-byte region [ffff88800fc53e80, ffff88800fc53f28) [ 39.145376] [ 39.145643] The buggy address belongs to the physical page: [ 39.146467] page:000000008fbe841b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc53 [ 39.147814] memcg:ffff88800ec65b01 [ 39.148347] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.149206] page_type: 0xffffffff() [ 39.149765] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f15c0 dead000000000003 [ 39.150728] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec65b01 [ 39.151629] page dumped because: kasan: bad access detected [ 39.152289] [ 39.152503] Memory state around the buggy address: [ 39.153086] ffff88800fc53d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.153943] ffff88800fc53e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.154807] >ffff88800fc53e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.155656] ^ [ 39.156382] ffff88800fc53f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.157233] ffff88800fc53f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.158095] ================================================================== [ 39.159207] Disabling lock debugging due to kernel taint [ 41.213524] BUG: Bad rss-counter state mm:000000006ea66299 type:MM_FILEPAGES val:33 [ 41.214749] BUG: Bad rss-counter state mm:000000006ea66299 type:MM_ANONPAGES val:22 [ 41.616773] BUG: Bad rss-counter state mm:000000006fdf9631 type:MM_FILEPAGES val:33 [ 41.617813] BUG: Bad rss-counter state mm:000000006fdf9631 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18603' (ECDSA) to the list of known hosts. 2023/06/20 20:13:22 fuzzer started 2023/06/20 20:13:22 dialing manager at localhost:36067 2023/06/20 20:13:22 checking machine... 2023/06/20 20:13:22 checking revisions... [ 42.332396] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:13:22 testing simple program... [ 42.379077] cgroup: Unknown subsys name 'net' [ 42.415442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:13:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff888016aa03f4 RBP=ffff888016aa0000 RSP=ffff8880102bf910 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888016aa0000 R13=0000000000000000 R14=ffffffff85652c08 R15=dffffc0000000000 RIP=ffffffff81374525 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 00007fd2d9d6d900 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=00007fd2da3250b0 CR3=000000000d9b2000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a50 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff88806cf09da8 RDI=ffffffff81370a8a RBP=ffff88806cf09aa8 RSP=ffff88806cf09a38 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff88800f5c1b40 R15=ffff88800e7a8b80 RIP=ffffffff81130399 RFL=00000202 [-------] 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 00007f61c4d33700 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=00007f71e647a7c0 CR3=000000000f642000 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=2032323a33313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a33313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000