syzkaller login: [ 61.176511] BUG: Bad rss-counter state mm:00000000d1678b10 type:MM_FILEPAGES val:33 [ 61.177694] BUG: Bad rss-counter state mm:00000000d1678b10 type:MM_ANONPAGES val:22 [ 61.212587] ================================================================== [ 61.213711] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.214776] Read of size 8 at addr ffff888014689a50 by task sshd/222 [ 61.215655] [ 61.215889] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.216864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.217967] Call Trace: [ 61.218366] [ 61.218737] dump_stack_lvl+0x91/0xf0 [ 61.219301] print_report+0xcc/0x620 [ 61.219802] ? __virt_addr_valid+0x102/0x340 [ 61.220398] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.221023] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.221647] kasan_report+0xbe/0xf0 [ 61.222124] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.222755] vma_interval_tree_remove+0xc75/0xec0 [ 61.223367] vma_prepare+0xc54/0x11a0 [ 61.224026] __split_vma+0x5af/0x950 [ 61.224506] ? __pfx___split_vma+0x10/0x10 [ 61.225044] ? find_held_lock+0x2c/0x110 [ 61.225570] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.226159] ? lock_is_held_type+0x9f/0x120 [ 61.226707] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.227323] ? mtree_range_walk+0x632/0x900 [ 61.227894] ? mas_walk+0x5c7/0x7c0 [ 61.228376] do_vmi_munmap+0x1f1/0x2b0 [ 61.228872] mmap_region+0x1f9/0x2660 [ 61.229365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.229885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.230614] ? __pfx_lock_acquire+0x10/0x10 [ 61.231152] ? __pfx_mmap_region+0x10/0x10 [ 61.231694] ? security_mmap_addr+0x7d/0xa0 [ 61.232250] ? get_unmapped_area+0x1f5/0x3f0 [ 61.232816] do_mmap+0x854/0xf00 [ 61.233260] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.233763] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.234337] ksys_mmap_pgoff+0x3af/0x500 [ 61.234851] do_syscall_64+0x3f/0x90 [ 61.235344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.236013] RIP: 0033:0x7fdb1513dd82 [ 61.236475] 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 [ 61.238604] RSP: 002b:00007ffc69891f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.239514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb1513dd82 [ 61.240385] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb14577000 [ 61.241235] RBP: 00007fdb14577000 R08: 0000000000000009 R09: 0000000000001000 [ 61.242084] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a8d61eb20 [ 61.242953] R13: 00007ffc69891f60 R14: 00007ffc69891f90 R15: 00007ffc698922f0 [ 61.243812] [ 61.244119] [ 61.244341] Allocated by task 215: [ 61.244774] kasan_save_stack+0x22/0x50 [ 61.245280] kasan_set_track+0x25/0x30 [ 61.245779] __kasan_slab_alloc+0x59/0x70 [ 61.246309] kmem_cache_alloc+0x16b/0x370 [ 61.246832] vm_area_dup+0x20/0x160 [ 61.247288] __split_vma+0x170/0x950 [ 61.247761] split_vma+0xc6/0x110 [ 61.248210] mprotect_fixup+0x8d2/0xb30 [ 61.248715] do_mprotect_pkey+0x87e/0xd40 [ 61.249237] __x64_sys_mprotect+0x78/0xc0 [ 61.249766] do_syscall_64+0x3f/0x90 [ 61.250250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.250895] [ 61.251109] Freed by task 215: [ 61.251505] kasan_save_stack+0x22/0x50 [ 61.252027] kasan_set_track+0x25/0x30 [ 61.252529] kasan_save_free_info+0x2b/0x50 [ 61.253069] __kasan_slab_free+0x10a/0x190 [ 61.253610] kmem_cache_free+0x10d/0x4d0 [ 61.254120] rcu_core+0x8c8/0x2860 [ 61.254575] __do_softirq+0x1b7/0x7d4 [ 61.255057] [ 61.255275] Last potentially related work creation: [ 61.255865] kasan_save_stack+0x22/0x50 [ 61.256368] __kasan_record_aux_stack+0x8e/0xa0 [ 61.256941] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.257585] remove_vma+0x139/0x170 [ 61.258050] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.258625] do_vmi_munmap+0x1f1/0x2b0 [ 61.259116] __vm_munmap+0x138/0x3a0 [ 61.259592] __x64_sys_munmap+0x59/0x80 [ 61.260119] do_syscall_64+0x3f/0x90 [ 61.260601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.261257] [ 61.261480] The buggy address belongs to the object at ffff8880146899f8 [ 61.261480] which belongs to the cache vm_area_struct of size 168 [ 61.262973] The buggy address is located 88 bytes inside of [ 61.262973] freed 168-byte region [ffff8880146899f8, ffff888014689aa0) [ 61.264432] [ 61.264651] The buggy address belongs to the physical page: [ 61.265309] page:0000000031560a1d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14689 [ 61.266403] memcg:ffff888018fc2801 [ 61.266833] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.267479] page_type: 0xffffffff() [ 61.267948] raw: 0100000000000200 ffff8880087a0c80 ffffea00002523c0 dead000000000008 [ 61.268866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fc2801 [ 61.269780] page dumped because: kasan: bad access detected [ 61.270451] [ 61.270673] Memory state around the buggy address: [ 61.271250] ffff888014689900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.272118] ffff888014689980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 61.272989] >ffff888014689a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.273841] ^ [ 61.274540] ffff888014689a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 61.275395] ffff888014689b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.276257] ================================================================== [ 61.277612] Disabling lock debugging due to kernel taint [ 63.640553] BUG: Bad rss-counter state mm:0000000018457ee3 type:MM_FILEPAGES val:33 [ 63.641737] BUG: Bad rss-counter state mm:0000000018457ee3 type:MM_ANONPAGES val:22 [ 64.076424] BUG: Bad rss-counter state mm:000000005c8e8e52 type:MM_FILEPAGES val:33 [ 64.077413] BUG: Bad rss-counter state mm:000000005c8e8e52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65147' (ECDSA) to the list of known hosts. 2023/06/20 16:42:33 fuzzer started 2023/06/20 16:42:33 dialing manager at localhost:36067 2023/06/20 16:42:33 checking machine... 2023/06/20 16:42:33 checking revisions... [ 64.790898] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:42:33 testing simple program... [ 64.838471] cgroup: Unknown subsys name 'net' [ 64.881117] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:42:33 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=1ffff11001e17fcb RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff810ad42c RDI=ffff88800f923240 RBP=ffff88800f923200 RSP=ffff88800f0bfe58 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000007 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810ad43e RFL=00000056 [---ZAP-] 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 00007f518f09c900 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=00007f518f651650 CR3=0000000015e32000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000002acd54596c RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000002a RSI=ffff88806cf28140 RDI=0000000000053855 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef146 R11=0000000000000001 R12=0000000000053855 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000013 [----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 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=00007f59a15f6700 CR3=000000000c666000 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=e70b5647198e729ddd48886c74fdb594 XMM02=000000000011d458d59e07bde36eea69 XMM03=000000000011d580ec2efd57dc4c00df XMM04=48abe301538ca41500000000000ae988 XMM05=55cea47235c8cfaa0000000000133250 XMM06=59d5b690e0af863b00000000001320e8 XMM07=fb795ef6d657705600000000001223b0 XMM08=2c67c8bc2e329bc3000000000011d580 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000