syzkaller login: [ 30.984857] BUG: Bad rss-counter state mm:00000000a698b2b5 type:MM_FILEPAGES val:33 [ 30.985881] BUG: Bad rss-counter state mm:00000000a698b2b5 type:MM_ANONPAGES val:22 [ 31.151940] ================================================================== [ 31.152864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.153834] Read of size 8 at addr ffff88800d6fd058 by task sshd/219 [ 31.154614] [ 31.154835] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.155813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.156801] Call Trace: [ 31.157118] [ 31.157435] dump_stack_lvl+0x91/0xf0 [ 31.157933] print_report+0xcc/0x620 [ 31.158423] ? __virt_addr_valid+0x102/0x340 [ 31.158985] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160238] kasan_report+0xbe/0xf0 [ 31.160725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.161356] vma_interval_tree_remove+0xc75/0xec0 [ 31.161974] vma_prepare+0xc54/0x11a0 [ 31.162464] __split_vma+0x5af/0x950 [ 31.162941] ? __pfx___split_vma+0x10/0x10 [ 31.163474] ? find_held_lock+0x2c/0x110 [ 31.164002] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.164578] ? lock_is_held_type+0x9f/0x120 [ 31.165127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.165770] ? mtree_range_walk+0x632/0x900 [ 31.166320] ? mas_walk+0x5c7/0x7c0 [ 31.166803] do_vmi_munmap+0x1f1/0x2b0 [ 31.167312] mmap_region+0x1f9/0x2660 [ 31.167798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.168313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.169023] ? __pfx_lock_acquire+0x10/0x10 [ 31.169584] ? __pfx_mmap_region+0x10/0x10 [ 31.170124] ? security_mmap_addr+0x7d/0xa0 [ 31.170663] ? get_unmapped_area+0x1f5/0x3f0 [ 31.171221] do_mmap+0x854/0xf00 [ 31.171663] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.172167] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.172739] ksys_mmap_pgoff+0x3af/0x500 [ 31.173261] do_syscall_64+0x3f/0x90 [ 31.173762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.174412] RIP: 0033:0x7f7b00aefd82 [ 31.174871] 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 [ 31.177000] RSP: 002b:00007ffc32297088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.177921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b00aefd82 [ 31.178773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7afff29000 [ 31.179619] RBP: 00007f7afff29000 R08: 0000000000000009 R09: 0000000000001000 [ 31.180467] R10: 0000000000000812 R11: 0000000000000206 R12: 000055569b8b2d90 [ 31.181320] R13: 00007ffc322970a0 R14: 00007ffc322970d0 R15: 00007ffc32297430 [ 31.182203] [ 31.182504] [ 31.182723] Allocated by task 212: [ 31.183163] kasan_save_stack+0x22/0x50 [ 31.183673] kasan_set_track+0x25/0x30 [ 31.184169] __kasan_slab_alloc+0x59/0x70 [ 31.184703] kmem_cache_alloc+0x16b/0x370 [ 31.185222] vm_area_dup+0x20/0x160 [ 31.185690] __split_vma+0x170/0x950 [ 31.186178] split_vma+0xc6/0x110 [ 31.186632] mprotect_fixup+0x8d2/0xb30 [ 31.187142] do_mprotect_pkey+0x87e/0xd40 [ 31.187672] __x64_sys_mprotect+0x78/0xc0 [ 31.188199] do_syscall_64+0x3f/0x90 [ 31.188691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189355] [ 31.189593] Freed by task 202: [ 31.189984] kasan_save_stack+0x22/0x50 [ 31.190495] kasan_set_track+0x25/0x30 [ 31.190996] kasan_save_free_info+0x2b/0x50 [ 31.191542] __kasan_slab_free+0x10a/0x190 [ 31.192083] kmem_cache_free+0x10d/0x4d0 [ 31.192597] rcu_core+0x8c8/0x2860 [ 31.193047] __do_softirq+0x1b7/0x7d4 [ 31.193550] [ 31.193766] Last potentially related work creation: [ 31.194373] kasan_save_stack+0x22/0x50 [ 31.194885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.195470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.196117] remove_vma+0x139/0x170 [ 31.196582] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.197141] do_vmi_munmap+0x1f1/0x2b0 [ 31.197643] __vm_munmap+0x138/0x3a0 [ 31.198121] __x64_sys_munmap+0x59/0x80 [ 31.198636] do_syscall_64+0x3f/0x90 [ 31.199118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.199765] [ 31.199983] The buggy address belongs to the object at ffff88800d6fd000 [ 31.199983] which belongs to the cache vm_area_struct of size 168 [ 31.201484] The buggy address is located 88 bytes inside of [ 31.201484] freed 168-byte region [ffff88800d6fd000, ffff88800d6fd0a8) [ 31.202890] [ 31.203110] The buggy address belongs to the physical page: [ 31.203768] page:0000000050bb990a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6fd [ 31.204868] memcg:ffff88800e52f301 [ 31.205298] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.205953] page_type: 0xffffffff() [ 31.206407] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.207338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e52f301 [ 31.208255] page dumped because: kasan: bad access detected [ 31.208926] [ 31.209143] Memory state around the buggy address: [ 31.209743] ffff88800d6fcf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.210604] ffff88800d6fcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.211470] >ffff88800d6fd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.212324] ^ [ 31.213058] ffff88800d6fd080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.213931] ffff88800d6fd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.214817] ================================================================== [ 31.215797] Disabling lock debugging due to kernel taint [ 33.208322] BUG: Bad rss-counter state mm:000000008a9dda13 type:MM_FILEPAGES val:33 [ 33.209566] BUG: Bad rss-counter state mm:000000008a9dda13 type:MM_ANONPAGES val:22 [ 33.688316] BUG: Bad rss-counter state mm:00000000377eea7b type:MM_FILEPAGES val:33 [ 33.689597] BUG: Bad rss-counter state mm:00000000377eea7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7222' (ECDSA) to the list of known hosts. 2023/06/20 00:34:15 fuzzer started 2023/06/20 00:34:15 dialing manager at localhost:44161 2023/06/20 00:34:15 checking machine... 2023/06/20 00:34:15 checking revisions... [ 34.400299] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:34:15 testing simple program... [ 34.453902] cgroup: Unknown subsys name 'net' [ 34.500769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffe9c8a1438 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=00007fdaab219510000055a464db6790 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=0000000000000003 RBX=ffffffff85d88414 RCX=ffffffff810bd032 RDX=0000000000000006 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88806cf09970 R8 =ffffffff86088c1a R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88420 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000216 [----AP-] 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 00007f34ada33900 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=00007f34adfea618 CR3=0000000016f36000 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=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