syzkaller login: [ 38.780731] BUG: Bad rss-counter state mm:00000000e963bb2b type:MM_FILEPAGES val:33 [ 38.782155] BUG: Bad rss-counter state mm:00000000e963bb2b type:MM_ANONPAGES val:22 [ 38.895050] ================================================================== [ 38.895962] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.896907] Read of size 8 at addr ffff8880198c5c20 by task sshd/227 [ 38.897679] [ 38.897920] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.898843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.899813] Call Trace: [ 38.900131] [ 38.900420] dump_stack_lvl+0x91/0xf0 [ 38.900916] print_report+0xcc/0x620 [ 38.901396] ? __virt_addr_valid+0x102/0x340 [ 38.902002] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902639] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903276] kasan_report+0xbe/0xf0 [ 38.903758] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904399] vma_interval_tree_remove+0xc75/0xec0 [ 38.905022] vma_prepare+0xc54/0x11a0 [ 38.905526] __split_vma+0x5af/0x950 [ 38.906024] ? __pfx___split_vma+0x10/0x10 [ 38.906569] ? find_held_lock+0x2c/0x110 [ 38.907126] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.907708] ? lock_is_held_type+0x9f/0x120 [ 38.908266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.908893] ? mtree_range_walk+0x632/0x900 [ 38.909465] ? mas_walk+0x5c7/0x7c0 [ 38.909986] do_vmi_munmap+0x1f1/0x2b0 [ 38.910502] mmap_region+0x1f9/0x2660 [ 38.911003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.911538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.912272] ? __pfx_lock_acquire+0x10/0x10 [ 38.912826] ? __pfx_mmap_region+0x10/0x10 [ 38.913371] ? security_mmap_addr+0x7d/0xa0 [ 38.913922] ? get_unmapped_area+0x1f5/0x3f0 [ 38.914485] do_mmap+0x854/0xf00 [ 38.914942] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.915447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.916035] ksys_mmap_pgoff+0x3af/0x500 [ 38.916565] do_syscall_64+0x3f/0x90 [ 38.917059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917741] RIP: 0033:0x7fcf34788d82 [ 38.918212] 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 [ 38.920473] RSP: 002b:00007ffc94302528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.921413] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf34788d82 [ 38.922301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf33bc2000 [ 38.923175] RBP: 00007fcf33bc2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.924058] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7699aeec0 [ 38.924929] R13: 00007ffc94302540 R14: 00007ffc94302570 R15: 00007ffc943028d0 [ 38.925845] [ 38.926143] [ 38.926361] Allocated by task 220: [ 38.926804] kasan_save_stack+0x22/0x50 [ 38.927331] kasan_set_track+0x25/0x30 [ 38.927833] __kasan_slab_alloc+0x59/0x70 [ 38.928366] kmem_cache_alloc+0x16b/0x370 [ 38.928901] vm_area_dup+0x20/0x160 [ 38.929373] __split_vma+0x170/0x950 [ 38.929869] split_vma+0xc6/0x110 [ 38.930327] mprotect_fixup+0x8d2/0xb30 [ 38.930845] do_mprotect_pkey+0x87e/0xd40 [ 38.931385] __x64_sys_mprotect+0x78/0xc0 [ 38.931926] do_syscall_64+0x3f/0x90 [ 38.932420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933080] [ 38.933304] Freed by task 19: [ 38.933698] kasan_save_stack+0x22/0x50 [ 38.934236] kasan_set_track+0x25/0x30 [ 38.934744] kasan_save_free_info+0x2b/0x50 [ 38.935284] __kasan_slab_free+0x10a/0x190 [ 38.935843] kmem_cache_free+0x10d/0x4d0 [ 38.936366] rcu_core+0x8c8/0x2860 [ 38.936822] __do_softirq+0x1b7/0x7d4 [ 38.937310] [ 38.937529] Last potentially related work creation: [ 38.938145] kasan_save_stack+0x22/0x50 [ 38.938673] __kasan_record_aux_stack+0x8e/0xa0 [ 38.939273] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.939939] remove_vma+0x139/0x170 [ 38.940398] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.940979] do_vmi_munmap+0x1f1/0x2b0 [ 38.941483] __vm_munmap+0x138/0x3a0 [ 38.941980] __x64_sys_munmap+0x59/0x80 [ 38.942489] do_syscall_64+0x3f/0x90 [ 38.942979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.943643] [ 38.943865] The buggy address belongs to the object at ffff8880198c5bc8 [ 38.943865] which belongs to the cache vm_area_struct of size 168 [ 38.945378] The buggy address is located 88 bytes inside of [ 38.945378] freed 168-byte region [ffff8880198c5bc8, ffff8880198c5c70) [ 38.946846] [ 38.947063] The buggy address belongs to the physical page: [ 38.947743] page:0000000096bb91e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198c5 [ 38.948871] memcg:ffff888016e95101 [ 38.949312] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.949991] page_type: 0xffffffff() [ 38.950459] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.951408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e95101 [ 38.952341] page dumped because: kasan: bad access detected [ 38.953027] [ 38.953246] Memory state around the buggy address: [ 38.953851] ffff8880198c5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.954710] ffff8880198c5b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.955572] >ffff8880198c5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.956421] ^ [ 38.956947] ffff8880198c5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.957820] ffff8880198c5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.958681] ================================================================== [ 38.959654] Disabling lock debugging due to kernel taint [ 40.750847] BUG: Bad rss-counter state mm:0000000060887e6c type:MM_FILEPAGES val:33 [ 40.751769] BUG: Bad rss-counter state mm:0000000060887e6c type:MM_ANONPAGES val:22 [ 41.178789] BUG: Bad rss-counter state mm:00000000d8941675 type:MM_FILEPAGES val:33 [ 41.179836] BUG: Bad rss-counter state mm:00000000d8941675 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60089' (ECDSA) to the list of known hosts. 2023/06/20 14:14:12 fuzzer started 2023/06/20 14:14:13 dialing manager at localhost:36067 2023/06/20 14:14:13 checking machine... 2023/06/20 14:14:13 checking revisions... [ 41.868627] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:14:13 testing simple program... [ 41.911856] cgroup: Unknown subsys name 'net' [ 41.955068] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:14:12 Registers: info registers vcpu 0 RAX=1ffff110011d3fdb RBX=ffff888008e9fea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888008e9fed8 RBP=ffff888008e83000 RSP=ffff888018cafa98 R8 =0000000000000001 R9 =ffffed1003195f47 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888008f5d000 R14=ffffffff8366b8df R15=0000000000000024 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f9b09804900 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=00007ffd5fca6000 CR3=000000000db2a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007fa313ee57d0 CR3=000000000c6ca000 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=2032313a34313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a34313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000