syzkaller login: [ 29.987449] BUG: Bad rss-counter state mm:00000000ce4872d3 type:MM_FILEPAGES val:33 [ 29.988489] BUG: Bad rss-counter state mm:00000000ce4872d3 type:MM_ANONPAGES val:22 [ 30.158400] ================================================================== [ 30.159311] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.160258] Read of size 8 at addr ffff888019d74968 by task sshd/221 [ 30.161037] [ 30.161263] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.162230] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.163207] Call Trace: [ 30.163521] <TASK> [ 30.163847] dump_stack_lvl+0x91/0xf0 [ 30.164342] print_report+0xcc/0x620 [ 30.164819] ? __virt_addr_valid+0x102/0x340 [ 30.165361] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.165981] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.166590] kasan_report+0xbe/0xf0 [ 30.167066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.167705] vma_interval_tree_remove+0xc75/0xec0 [ 30.168304] vma_prepare+0xc54/0x11a0 [ 30.168782] __split_vma+0x5af/0x950 [ 30.169253] ? __pfx___split_vma+0x10/0x10 [ 30.169781] ? find_held_lock+0x2c/0x110 [ 30.170295] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.170853] ? lock_is_held_type+0x9f/0x120 [ 30.171388] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.172014] ? mtree_range_walk+0x632/0x900 [ 30.172563] ? mas_walk+0x5c7/0x7c0 [ 30.173033] do_vmi_munmap+0x1f1/0x2b0 [ 30.173529] mmap_region+0x1f9/0x2660 [ 30.174004] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.174510] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.175224] ? __pfx_lock_acquire+0x10/0x10 [ 30.175763] ? __pfx_mmap_region+0x10/0x10 [ 30.176286] ? security_mmap_addr+0x7d/0xa0 [ 30.176812] ? get_unmapped_area+0x1f5/0x3f0 [ 30.177358] do_mmap+0x854/0xf00 [ 30.177798] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.178293] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.178853] ksys_mmap_pgoff+0x3af/0x500 [ 30.179368] do_syscall_64+0x3f/0x90 [ 30.179866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.180507] RIP: 0033:0x7fad61956d82 [ 30.180968] 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 [ 30.183104] RSP: 002b:00007ffc7e70e358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.184032] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad61956d82 [ 30.184873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad60d90000 [ 30.185711] RBP: 00007fad60d90000 R08: 0000000000000009 R09: 0000000000001000 [ 30.186544] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2da7bdf70 [ 30.187381] R13: 00007ffc7e70e370 R14: 00007ffc7e70e3a0 R15: 00007ffc7e70e700 [ 30.188242] </TASK> [ 30.188532] [ 30.188747] Allocated by task 214: [ 30.189175] kasan_save_stack+0x22/0x50 [ 30.189678] kasan_set_track+0x25/0x30 [ 30.190179] __kasan_slab_alloc+0x59/0x70 [ 30.190700] kmem_cache_alloc+0x16b/0x370 [ 30.191212] vm_area_dup+0x20/0x160 [ 30.191668] __split_vma+0x170/0x950 [ 30.192139] split_vma+0xc6/0x110 [ 30.192593] mprotect_fixup+0x8d2/0xb30 [ 30.193094] do_mprotect_pkey+0x87e/0xd40 [ 30.193618] __x64_sys_mprotect+0x78/0xc0 [ 30.194131] do_syscall_64+0x3f/0x90 [ 30.194605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.195264] [ 30.195485] Freed by task 204: [ 30.195894] kasan_save_stack+0x22/0x50 [ 30.196413] kasan_set_track+0x25/0x30 [ 30.196924] kasan_save_free_info+0x2b/0x50 [ 30.197461] __kasan_slab_free+0x10a/0x190 [ 30.197995] kmem_cache_free+0x10d/0x4d0 [ 30.198495] rcu_core+0x8c8/0x2860 [ 30.198942] __do_softirq+0x1b7/0x7d4 [ 30.199410] [ 30.199630] Last potentially related work creation: [ 30.200213] kasan_save_stack+0x22/0x50 [ 30.200713] __kasan_record_aux_stack+0x8e/0xa0 [ 30.201289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.201936] remove_vma+0x139/0x170 [ 30.202391] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.202944] do_vmi_munmap+0x1f1/0x2b0 [ 30.203425] __vm_munmap+0x138/0x3a0 [ 30.203895] __x64_sys_munmap+0x59/0x80 [ 30.204383] do_syscall_64+0x3f/0x90 [ 30.204851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.205493] [ 30.205706] The buggy address belongs to the object at ffff888019d74910 [ 30.205706] which belongs to the cache vm_area_struct of size 168 [ 30.207158] The buggy address is located 88 bytes inside of [ 30.207158] freed 168-byte region [ffff888019d74910, ffff888019d749b8) [ 30.208578] [ 30.208797] The buggy address belongs to the physical page: [ 30.209449] page:00000000335f1daf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d74 [ 30.210532] memcg:ffff88800eb63d01 [ 30.210957] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.211605] page_type: 0xffffffff() [ 30.212063] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.212969] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb63d01 [ 30.213862] page dumped because: kasan: bad access detected [ 30.214521] [ 30.214735] Memory state around the buggy address: [ 30.215307] ffff888019d74800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.216160] ffff888019d74880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.217007] >ffff888019d74900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.217871] ^ [ 30.218665] ffff888019d74980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.219527] ffff888019d74a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.220418] ================================================================== [ 30.221396] Disabling lock debugging due to kernel taint [ 32.148315] BUG: Bad rss-counter state mm:00000000737524ef type:MM_FILEPAGES val:33 [ 32.149826] BUG: Bad rss-counter state mm:00000000737524ef type:MM_ANONPAGES val:22 [ 32.716681] BUG: Bad rss-counter state mm:00000000f60a952c type:MM_FILEPAGES val:33 [ 32.717866] BUG: Bad rss-counter state mm:00000000f60a952c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53847' (ECDSA) to the list of known hosts. 2023/06/19 18:33:31 fuzzer started 2023/06/19 18:33:32 dialing manager at localhost:44161 2023/06/19 18:33:32 checking machine... 2023/06/19 18:33:32 checking revisions... [ 33.346765] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:33:32 testing simple program... [ 33.379486] cgroup: Unknown subsys name 'net' [ 33.419772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:33:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff836382d7 RCX=0000000000000001 RDX=1ffff110028d5e7c RSI=ffff8880146afaf0 RDI=ffffffff836382d7 RBP=ffff8880146af3e0 RSP=ffff8880146af358 R8 =0000000000000001 R9 =ffff8880146af3c8 R10=0000000000038001 R11=0000000000091b07 R12=ffff8880146af450 R13=0000000000000000 R14=ffff88800ea9d1c0 R15=00000000000128c0 RIP=ffffffff811fc7a0 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 00007f0263b60900 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=00007fd31b3f26d0 CR3=0000000016760000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800c5c2260 RCX=ffffffff818465f5 RDX=ffffed10018b845f RSI=0000000000000004 RDI=ffff88800c5c22f0 RBP=ffff88806cf09de0 RSP=ffff88806cf09da0 R8 =0000000000000001 R9 =ffffed10018b845e R10=ffff88800c5c22f3 R11=0000000000000000 R12=ffff888008441a00 R13=ffffea0000389c80 R14=ffffffff82197732 R15=0000000000000000 RIP=ffffffff818465fe 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 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=00007f0264117618 CR3=000000000c696000 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=33333a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303039 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000