syzkaller login: [ 30.971525] BUG: Bad rss-counter state mm:000000009b0ceb75 type:MM_FILEPAGES val:33 [ 30.972847] BUG: Bad rss-counter state mm:000000009b0ceb75 type:MM_ANONPAGES val:22 [ 31.132084] ================================================================== [ 31.133442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.134703] Read of size 8 at addr ffff888016b7bb38 by task sshd/219 [ 31.135743] [ 31.135967] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.137023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.138389] Call Trace: [ 31.138826] [ 31.139220] dump_stack_lvl+0x91/0xf0 [ 31.139882] print_report+0xcc/0x620 [ 31.140533] ? __virt_addr_valid+0x102/0x340 [ 31.141285] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142149] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142988] kasan_report+0xbe/0xf0 [ 31.143638] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144484] vma_interval_tree_remove+0xc75/0xec0 [ 31.145322] vma_prepare+0xc54/0x11a0 [ 31.145995] __split_vma+0x5af/0x950 [ 31.146642] ? __pfx___split_vma+0x10/0x10 [ 31.147348] ? find_held_lock+0x2c/0x110 [ 31.148058] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.148820] ? lock_is_held_type+0x9f/0x120 [ 31.149583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.150407] ? mtree_range_walk+0x632/0x900 [ 31.151169] ? mas_walk+0x5c7/0x7c0 [ 31.151824] do_vmi_munmap+0x1f1/0x2b0 [ 31.152510] mmap_region+0x1f9/0x2660 [ 31.153167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.153862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.154849] ? __pfx_lock_acquire+0x10/0x10 [ 31.155582] ? __pfx_mmap_region+0x10/0x10 [ 31.156295] ? security_mmap_addr+0x7d/0xa0 [ 31.157010] ? get_unmapped_area+0x1f5/0x3f0 [ 31.157780] do_mmap+0x854/0xf00 [ 31.158393] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.159066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.159834] ksys_mmap_pgoff+0x3af/0x500 [ 31.160537] do_syscall_64+0x3f/0x90 [ 31.161188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162069] RIP: 0033:0x7f5a33621d82 [ 31.162692] 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 [ 31.165618] RSP: 002b:00007ffd83bb7098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.166832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a33621d82 [ 31.167978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a32a5b000 [ 31.169143] RBP: 00007f5a32a5b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.170322] R10: 0000000000000812 R11: 0000000000000206 R12: 000056342ce05f70 [ 31.171477] R13: 00007ffd83bb70b0 R14: 00007ffd83bb70e0 R15: 00007ffd83bb7440 [ 31.172633] [ 31.173042] [ 31.173333] Allocated by task 212: [ 31.173968] kasan_save_stack+0x22/0x50 [ 31.174670] kasan_set_track+0x25/0x30 [ 31.175353] __kasan_slab_alloc+0x59/0x70 [ 31.176059] kmem_cache_alloc+0x16b/0x370 [ 31.176767] vm_area_dup+0x20/0x160 [ 31.177391] __split_vma+0x170/0x950 [ 31.178059] split_vma+0xc6/0x110 [ 31.178644] mprotect_fixup+0x8d2/0xb30 [ 31.179326] do_mprotect_pkey+0x87e/0xd40 [ 31.180050] __x64_sys_mprotect+0x78/0xc0 [ 31.180753] do_syscall_64+0x3f/0x90 [ 31.181405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182329] [ 31.182604] Freed by task 212: [ 31.183095] kasan_save_stack+0x22/0x50 [ 31.183719] kasan_set_track+0x25/0x30 [ 31.184332] kasan_save_free_info+0x2b/0x50 [ 31.184981] __kasan_slab_free+0x10a/0x190 [ 31.185674] kmem_cache_free+0x10d/0x4d0 [ 31.186361] rcu_core+0x8c8/0x2860 [ 31.186897] __do_softirq+0x1b7/0x7d4 [ 31.187482] [ 31.187747] Last potentially related work creation: [ 31.188477] kasan_save_stack+0x22/0x50 [ 31.189101] __kasan_record_aux_stack+0x8e/0xa0 [ 31.189828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.190663] remove_vma+0x139/0x170 [ 31.191225] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.191917] do_vmi_munmap+0x1f1/0x2b0 [ 31.192509] __vm_munmap+0x138/0x3a0 [ 31.193087] __x64_sys_munmap+0x59/0x80 [ 31.193715] do_syscall_64+0x3f/0x90 [ 31.194341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195138] [ 31.195397] The buggy address belongs to the object at ffff888016b7bae0 [ 31.195397] which belongs to the cache vm_area_struct of size 168 [ 31.197216] The buggy address is located 88 bytes inside of [ 31.197216] freed 168-byte region [ffff888016b7bae0, ffff888016b7bb88) [ 31.198885] [ 31.199106] The buggy address belongs to the physical page: [ 31.199773] page:0000000079cff0af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b7b [ 31.200881] memcg:ffff88800ffd5701 [ 31.201313] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.201973] page_type: 0xffffffff() [ 31.202473] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.203400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ffd5701 [ 31.204329] page dumped because: kasan: bad access detected [ 31.205007] [ 31.205229] Memory state around the buggy address: [ 31.205838] ffff888016b7ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.206742] ffff888016b7ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.207615] >ffff888016b7bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.208482] ^ [ 31.209098] ffff888016b7bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.210002] ffff888016b7bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.210894] ================================================================== [ 31.211846] Disabling lock debugging due to kernel taint [ 33.371084] BUG: Bad rss-counter state mm:0000000004cec037 type:MM_FILEPAGES val:33 [ 33.372118] BUG: Bad rss-counter state mm:0000000004cec037 type:MM_ANONPAGES val:22 [ 33.858503] BUG: Bad rss-counter state mm:00000000cac887de type:MM_FILEPAGES val:33 [ 33.859298] BUG: Bad rss-counter state mm:00000000cac887de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55415' (ECDSA) to the list of known hosts. 2023/06/20 00:29:44 fuzzer started 2023/06/20 00:29:45 dialing manager at localhost:44161 2023/06/20 00:29:45 checking machine... 2023/06/20 00:29:45 checking revisions... [ 34.559371] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:29:45 testing simple program... [ 34.611552] cgroup: Unknown subsys name 'net' [ 34.649428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:29:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880967487a0 RCX=ffffffff8114313a RDX=ffff888017fc0000 RSI=0000000000000000 RDI=0000000000000006 RBP=00000000167487a0 RSP=ffff88801979f988 R8 =0000000000000006 R9 =ffff8880967487a0 R10=00000000167487a0 R11=00000000000b6996 R12=0000000000000000 R13=ffffea0000369500 R14=ffffffff83677d48 R15=0000000000000001 RIP=ffffffff814c0245 RFL=00000293 [--S-A-C] 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 00007f89e73da900 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=00007ffe5dccd000 CR3=000000001695a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f8dd5929070 CR3=0000000008dce000 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=4fb01f3bb7119ab4c54f8d5778f77f6d XMM02=000000000011cf68eff9b2d0a8fce9cb XMM03=000000000011d0382c67c8bc2e329bc3 XMM04=5600bf028a96f9bf00000000000ae988 XMM05=dfcdbad4f1609c3700000000001343a8 XMM06=806171799158d9670000000000134230 XMM07=e042d86d42eb936e0000000000124ac8 XMM08=d17f57baf5c2de4e000000000011d038 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000