syzkaller login: [ 31.196457] BUG: Bad rss-counter state mm:00000000887f8608 type:MM_FILEPAGES val:33 [ 31.197688] BUG: Bad rss-counter state mm:00000000887f8608 type:MM_ANONPAGES val:22 [ 31.238865] ================================================================== [ 31.239868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.240992] Read of size 8 at addr ffff88800f027880 by task sshd/221 [ 31.241809] [ 31.242040] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.242959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.243982] Call Trace: [ 31.244317] [ 31.244625] dump_stack_lvl+0x91/0xf0 [ 31.245172] print_report+0xcc/0x620 [ 31.245690] ? __virt_addr_valid+0x102/0x340 [ 31.246273] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.246930] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247584] kasan_report+0xbe/0xf0 [ 31.248090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.248750] vma_interval_tree_remove+0xc75/0xec0 [ 31.249384] vma_prepare+0xc54/0x11a0 [ 31.249893] __split_vma+0x5af/0x950 [ 31.250391] ? __pfx___split_vma+0x10/0x10 [ 31.250954] ? find_held_lock+0x2c/0x110 [ 31.251506] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.252103] ? lock_is_held_type+0x9f/0x120 [ 31.252677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.253327] ? mtree_range_walk+0x632/0x900 [ 31.253907] ? mas_walk+0x5c7/0x7c0 [ 31.254410] do_vmi_munmap+0x1f1/0x2b0 [ 31.254931] mmap_region+0x1f9/0x2660 [ 31.255439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.255982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.256755] ? __pfx_lock_acquire+0x10/0x10 [ 31.257315] ? __pfx_mmap_region+0x10/0x10 [ 31.257880] ? security_mmap_addr+0x7d/0xa0 [ 31.258441] ? get_unmapped_area+0x1f5/0x3f0 [ 31.259021] do_mmap+0x854/0xf00 [ 31.259483] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.260004] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.260601] ksys_mmap_pgoff+0x3af/0x500 [ 31.261166] do_syscall_64+0x3f/0x90 [ 31.261674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262357] RIP: 0033:0x7f95614f9d82 [ 31.262840] 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 [ 31.265097] RSP: 002b:00007fff9b6b2d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.266054] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95614f9d82 [ 31.266948] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9560933000 [ 31.267847] RBP: 00007f9560933000 R08: 0000000000000009 R09: 0000000000001000 [ 31.268763] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9e12bcec0 [ 31.269653] R13: 00007fff9b6b2d30 R14: 00007fff9b6b2d60 R15: 00007fff9b6b30c0 [ 31.270556] [ 31.270866] [ 31.271096] Allocated by task 214: [ 31.271572] kasan_save_stack+0x22/0x50 [ 31.272107] kasan_set_track+0x25/0x30 [ 31.272644] __kasan_slab_alloc+0x59/0x70 [ 31.273230] kmem_cache_alloc+0x16b/0x370 [ 31.273793] vm_area_dup+0x20/0x160 [ 31.274287] __split_vma+0x170/0x950 [ 31.274796] split_vma+0xc6/0x110 [ 31.275268] mprotect_fixup+0x8d2/0xb30 [ 31.275808] do_mprotect_pkey+0x87e/0xd40 [ 31.276383] __x64_sys_mprotect+0x78/0xc0 [ 31.276962] do_syscall_64+0x3f/0x90 [ 31.277479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278196] [ 31.278438] Freed by task 19: [ 31.278869] kasan_save_stack+0x22/0x50 [ 31.279431] kasan_set_track+0x25/0x30 [ 31.279982] kasan_save_free_info+0x2b/0x50 [ 31.280569] __kasan_slab_free+0x10a/0x190 [ 31.281150] kmem_cache_free+0x10d/0x4d0 [ 31.281688] rcu_core+0x8c8/0x2860 [ 31.282158] __do_softirq+0x1b7/0x7d4 [ 31.282666] [ 31.282892] Last potentially related work creation: [ 31.283511] kasan_save_stack+0x22/0x50 [ 31.284046] __kasan_record_aux_stack+0x8e/0xa0 [ 31.284649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.285347] remove_vma+0x139/0x170 [ 31.285824] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286420] do_vmi_munmap+0x1f1/0x2b0 [ 31.286935] __vm_munmap+0x138/0x3a0 [ 31.287427] __x64_sys_munmap+0x59/0x80 [ 31.287953] do_syscall_64+0x3f/0x90 [ 31.288453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.289140] [ 31.289367] Second to last potentially related work creation: [ 31.290082] kasan_save_stack+0x22/0x50 [ 31.290611] __kasan_record_aux_stack+0x8e/0xa0 [ 31.291218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.291901] remove_vma+0x139/0x170 [ 31.292380] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.292982] do_vmi_munmap+0x1f1/0x2b0 [ 31.293498] mmap_region+0x1f9/0x2660 [ 31.294001] do_mmap+0x854/0xf00 [ 31.294456] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.294974] ksys_mmap_pgoff+0x3af/0x500 [ 31.295507] do_syscall_64+0x3f/0x90 [ 31.296013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296690] [ 31.296925] The buggy address belongs to the object at ffff88800f027828 [ 31.296925] which belongs to the cache vm_area_struct of size 168 [ 31.298477] The buggy address is located 88 bytes inside of [ 31.298477] freed 168-byte region [ffff88800f027828, ffff88800f0278d0) [ 31.299957] [ 31.300188] The buggy address belongs to the physical page: [ 31.300896] page:00000000f2f72ca0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf027 [ 31.302033] memcg:ffff888013f5e001 [ 31.302480] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.303157] page_type: 0xffffffff() [ 31.303636] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c2000 dead000000000002 [ 31.304601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f5e001 [ 31.305569] page dumped because: kasan: bad access detected [ 31.306270] [ 31.306496] Memory state around the buggy address: [ 31.307110] ffff88800f027780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.308012] ffff88800f027800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.308954] >ffff88800f027880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.309906] ^ [ 31.310374] ffff88800f027900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.311333] ffff88800f027980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.312279] ================================================================== [ 31.313480] Disabling lock debugging due to kernel taint [ 33.029642] BUG: Bad rss-counter state mm:000000008a5bd33e type:MM_FILEPAGES val:33 [ 33.030389] BUG: Bad rss-counter state mm:000000008a5bd33e type:MM_ANONPAGES val:22 [ 33.477093] BUG: Bad rss-counter state mm:0000000060fe7be8 type:MM_FILEPAGES val:33 [ 33.477842] BUG: Bad rss-counter state mm:0000000060fe7be8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22113' (ECDSA) to the list of known hosts. 2023/06/21 05:11:17 fuzzer started 2023/06/21 05:11:17 dialing manager at localhost:36067 2023/06/21 05:11:17 checking machine... 2023/06/21 05:11:17 checking revisions... [ 34.156451] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:11:17 testing simple program... [ 34.211005] cgroup: Unknown subsys name 'net' [ 34.250678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:11:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800dc01280 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed1001b80252 RSP=ffff88806ce09cc0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88801966e000 R13=dffffc0000000000 R14=ffff88800dc01290 R15=ffff88801021b010 RIP=ffffffff81828e27 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=00007ffcaf0e4418 CR3=0000000005482000 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=00007f8b8ee8e510000055ed333e4790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801463f8ba RSP=ffff88801463f808 R8 =ffffffff864bbb58 R9 =ffff88801463f8b8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801463f8d8 R13=ffff88801463f8c0 R14=ffff88801463ff58 R15=ffff88801463f878 RIP=ffffffff81131928 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 00007f5b124a4900 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=00007f5b12a5c0b0 CR3=000000000c5e0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000