syzkaller login: [ 30.023788] BUG: Bad rss-counter state mm:0000000044d77a17 type:MM_FILEPAGES val:33 [ 30.025072] BUG: Bad rss-counter state mm:0000000044d77a17 type:MM_ANONPAGES val:22 [ 30.149294] ================================================================== [ 30.150033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.150811] Read of size 8 at addr ffff8880164eac20 by task sshd/221 [ 30.151447] [ 30.151623] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.152341] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.153263] Call Trace: [ 30.153527] [ 30.153765] dump_stack_lvl+0x91/0xf0 [ 30.154194] print_report+0xcc/0x620 [ 30.154591] ? __virt_addr_valid+0x102/0x340 [ 30.155041] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.155547] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.156044] kasan_report+0xbe/0xf0 [ 30.156440] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.156947] vma_interval_tree_remove+0xc75/0xec0 [ 30.157444] vma_prepare+0xc54/0x11a0 [ 30.157835] __split_vma+0x5af/0x950 [ 30.158227] ? __pfx___split_vma+0x10/0x10 [ 30.158665] ? find_held_lock+0x2c/0x110 [ 30.159092] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.159557] ? lock_is_held_type+0x9f/0x120 [ 30.160003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.160502] ? mtree_range_walk+0x632/0x900 [ 30.160954] ? mas_walk+0x5c7/0x7c0 [ 30.161350] do_vmi_munmap+0x1f1/0x2b0 [ 30.161762] mmap_region+0x1f9/0x2660 [ 30.162165] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.162582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.163158] ? __pfx_lock_acquire+0x10/0x10 [ 30.163585] ? __pfx_mmap_region+0x10/0x10 [ 30.164024] ? security_mmap_addr+0x7d/0xa0 [ 30.164461] ? get_unmapped_area+0x1f5/0x3f0 [ 30.164917] do_mmap+0x854/0xf00 [ 30.165283] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.165689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.166153] ksys_mmap_pgoff+0x3af/0x500 [ 30.166572] do_syscall_64+0x3f/0x90 [ 30.166958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.167490] RIP: 0033:0x7f5e670f4d82 [ 30.167870] 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 [ 30.169602] RSP: 002b:00007ffca707c528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.170357] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e670f4d82 [ 30.171051] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e6652e000 [ 30.171738] RBP: 00007f5e6652e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.172432] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b84dadec0 [ 30.173128] R13: 00007ffca707c540 R14: 00007ffca707c570 R15: 00007ffca707c8d0 [ 30.173827] [ 30.174062] [ 30.174255] Allocated by task 214: [ 30.174607] kasan_save_stack+0x22/0x50 [ 30.175016] kasan_set_track+0x25/0x30 [ 30.175421] __kasan_slab_alloc+0x59/0x70 [ 30.175847] kmem_cache_alloc+0x16b/0x370 [ 30.176263] vm_area_dup+0x20/0x160 [ 30.176630] __split_vma+0x170/0x950 [ 30.177009] split_vma+0xc6/0x110 [ 30.177372] mprotect_fixup+0x8d2/0xb30 [ 30.177781] do_mprotect_pkey+0x87e/0xd40 [ 30.178212] __x64_sys_mprotect+0x78/0xc0 [ 30.178636] do_syscall_64+0x3f/0x90 [ 30.179033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.179548] [ 30.179724] Freed by task 214: [ 30.180038] kasan_save_stack+0x22/0x50 [ 30.180447] kasan_set_track+0x25/0x30 [ 30.180847] kasan_save_free_info+0x2b/0x50 [ 30.181270] __kasan_slab_free+0x10a/0x190 [ 30.181696] kmem_cache_free+0x10d/0x4d0 [ 30.182123] rcu_core+0x8c8/0x2860 [ 30.182487] __do_softirq+0x1b7/0x7d4 [ 30.182872] [ 30.183045] Last potentially related work creation: [ 30.183512] kasan_save_stack+0x22/0x50 [ 30.183918] __kasan_record_aux_stack+0x8e/0xa0 [ 30.184392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.184908] remove_vma+0x139/0x170 [ 30.185275] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.185728] do_vmi_munmap+0x1f1/0x2b0 [ 30.186121] __vm_munmap+0x138/0x3a0 [ 30.186502] __x64_sys_munmap+0x59/0x80 [ 30.186905] do_syscall_64+0x3f/0x90 [ 30.187289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.187805] [ 30.187980] The buggy address belongs to the object at ffff8880164eabc8 [ 30.187980] which belongs to the cache vm_area_struct of size 168 [ 30.189186] The buggy address is located 88 bytes inside of [ 30.189186] freed 168-byte region [ffff8880164eabc8, ffff8880164eac70) [ 30.190336] [ 30.190514] The buggy address belongs to the physical page: [ 30.191061] page:00000000d0d0624c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164ea [ 30.191961] memcg:ffff88800f578b01 [ 30.192310] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.192839] page_type: 0xffffffff() [ 30.193214] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.193977] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f578b01 [ 30.194808] page dumped because: kasan: bad access detected [ 30.195359] [ 30.195537] Memory state around the buggy address: [ 30.196009] ffff8880164eab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.196705] ffff8880164eab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.197402] >ffff8880164eac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.198114] ^ [ 30.198552] ffff8880164eac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.199254] ffff8880164ead00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.199940] ================================================================== [ 30.200685] Disabling lock debugging due to kernel taint [ 33.035057] BUG: Bad rss-counter state mm:00000000d8228954 type:MM_FILEPAGES val:33 [ 33.036226] BUG: Bad rss-counter state mm:00000000d8228954 type:MM_ANONPAGES val:22 [ 33.462038] BUG: Bad rss-counter state mm:00000000358259dc type:MM_FILEPAGES val:33 [ 33.463234] BUG: Bad rss-counter state mm:00000000358259dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1062' (ECDSA) to the list of known hosts. 2023/06/20 20:10:56 fuzzer started 2023/06/20 20:10:56 dialing manager at localhost:36067 2023/06/20 20:10:56 checking machine... 2023/06/20 20:10:56 checking revisions... [ 34.204377] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:10:56 testing simple program... [ 34.270023] cgroup: Unknown subsys name 'net' [ 34.334779] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008fe8000 RCX=ffffffff87f97640 RDX=0000000000000000 RSI=0000000000000001 RDI=ffff8880196c3680 RBP=0000000000000000 RSP=ffff88801b66fc50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000fffff000 R13=0000000000000000 R14=ffff888014659000 R15=ffff8880192f8b80 RIP=ffffffff811f8ad4 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 00007ff0dbd78900 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=00007ffc2c502000 CR3=000000001b610000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007efe0b6b8030 CR3=0000000014720000 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=2035353a30313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000