syzkaller login: [ 36.732803] BUG: Bad rss-counter state mm:000000007332fab1 type:MM_FILEPAGES val:33 [ 36.734063] BUG: Bad rss-counter state mm:000000007332fab1 type:MM_ANONPAGES val:22 [ 36.913138] ================================================================== [ 36.913827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.914546] Read of size 8 at addr ffff8880166ad140 by task sshd/218 [ 36.915132] [ 36.915299] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.916107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.916965] Call Trace: [ 36.917213] [ 36.917429] dump_stack_lvl+0x91/0xf0 [ 36.917798] print_report+0xcc/0x620 [ 36.918177] ? __virt_addr_valid+0x102/0x340 [ 36.918606] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.919058] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.919424] kasan_report+0xbe/0xf0 [ 36.919701] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.920092] vma_interval_tree_remove+0xc75/0xec0 [ 36.920464] vma_prepare+0xc54/0x11a0 [ 36.920756] __split_vma+0x5af/0x950 [ 36.921053] ? __pfx___split_vma+0x10/0x10 [ 36.921377] ? find_held_lock+0x2c/0x110 [ 36.921691] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.922056] ? lock_is_held_type+0x9f/0x120 [ 36.922397] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.922775] ? mtree_range_walk+0x632/0x900 [ 36.923125] ? mas_walk+0x5c7/0x7c0 [ 36.923423] do_vmi_munmap+0x1f1/0x2b0 [ 36.923732] mmap_region+0x1f9/0x2660 [ 36.924050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.924370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.924814] ? __pfx_lock_acquire+0x10/0x10 [ 36.925157] ? __pfx_mmap_region+0x10/0x10 [ 36.925484] ? security_mmap_addr+0x7d/0xa0 [ 36.925814] ? get_unmapped_area+0x1f5/0x3f0 [ 36.926162] do_mmap+0x854/0xf00 [ 36.926432] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.926738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.927098] ksys_mmap_pgoff+0x3af/0x500 [ 36.927408] do_syscall_64+0x3f/0x90 [ 36.927705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.928138] RIP: 0033:0x7f322e321d82 [ 36.928424] 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 [ 36.929765] RSP: 002b:00007ffca1ef4918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.930336] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f322e321d82 [ 36.930879] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f322d75b000 [ 36.931403] RBP: 00007f322d75b000 R08: 0000000000000009 R09: 0000000000001000 [ 36.931946] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556db15edec0 [ 36.932475] R13: 00007ffca1ef4930 R14: 00007ffca1ef4960 R15: 00007ffca1ef4cc0 [ 36.933018] [ 36.933199] [ 36.933331] Allocated by task 211: [ 36.933601] kasan_save_stack+0x22/0x50 [ 36.933922] kasan_set_track+0x25/0x30 [ 36.934230] __kasan_slab_alloc+0x59/0x70 [ 36.934559] kmem_cache_alloc+0x16b/0x370 [ 36.934887] vm_area_dup+0x20/0x160 [ 36.935175] __split_vma+0x170/0x950 [ 36.935466] split_vma+0xc6/0x110 [ 36.935735] mprotect_fixup+0x8d2/0xb30 [ 36.936065] do_mprotect_pkey+0x87e/0xd40 [ 36.936388] __x64_sys_mprotect+0x78/0xc0 [ 36.936713] do_syscall_64+0x3f/0x90 [ 36.937016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.937413] [ 36.937548] Freed by task 211: [ 36.937787] kasan_save_stack+0x22/0x50 [ 36.938105] kasan_set_track+0x25/0x30 [ 36.938409] kasan_save_free_info+0x2b/0x50 [ 36.938735] __kasan_slab_free+0x10a/0x190 [ 36.939072] kmem_cache_free+0x10d/0x4d0 [ 36.939384] rcu_core+0x8c8/0x2860 [ 36.939657] __do_softirq+0x1b7/0x7d4 [ 36.939979] [ 36.940113] Last potentially related work creation: [ 36.940481] kasan_save_stack+0x22/0x50 [ 36.940790] __kasan_record_aux_stack+0x8e/0xa0 [ 36.941150] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.941557] remove_vma+0x139/0x170 [ 36.941844] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.942198] do_vmi_munmap+0x1f1/0x2b0 [ 36.942502] __vm_munmap+0x138/0x3a0 [ 36.942799] __x64_sys_munmap+0x59/0x80 [ 36.943114] do_syscall_64+0x3f/0x90 [ 36.943402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.943799] [ 36.943942] The buggy address belongs to the object at ffff8880166ad0e8 [ 36.943942] which belongs to the cache vm_area_struct of size 168 [ 36.944859] The buggy address is located 88 bytes inside of [ 36.944859] freed 168-byte region [ffff8880166ad0e8, ffff8880166ad190) [ 36.945729] [ 36.945870] The buggy address belongs to the physical page: [ 36.946281] page:000000005e8e06d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166ad [ 36.946962] memcg:ffff88800f273b01 [ 36.947226] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.947627] page_type: 0xffffffff() [ 36.947933] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.948507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f273b01 [ 36.949080] page dumped because: kasan: bad access detected [ 36.949492] [ 36.949627] Memory state around the buggy address: [ 36.949991] ffff8880166ad000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.950523] ffff8880166ad080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 36.951059] >ffff8880166ad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.951589] ^ [ 36.952002] ffff8880166ad180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.952523] ffff8880166ad200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.953062] ================================================================== [ 36.953627] Disabling lock debugging due to kernel taint [ 38.742726] BUG: Bad rss-counter state mm:000000008875e790 type:MM_FILEPAGES val:33 [ 38.743601] BUG: Bad rss-counter state mm:000000008875e790 type:MM_ANONPAGES val:22 [ 39.206853] BUG: Bad rss-counter state mm:00000000adf98187 type:MM_FILEPAGES val:33 [ 39.207866] BUG: Bad rss-counter state mm:00000000adf98187 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34621' (ECDSA) to the list of known hosts. 2023/06/20 02:00:15 fuzzer started 2023/06/20 02:00:15 dialing manager at localhost:44161 2023/06/20 02:00:15 checking machine... 2023/06/20 02:00:15 checking revisions... [ 39.941948] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:00:15 testing simple program... [ 39.980628] cgroup: Unknown subsys name 'net' [ 40.025431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:00:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008f92000 RCX=ffffffff812bc24d RDX=1ffff110032402a2 RSI=0000000000000004 RDI=ffff888019201510 RBP=ffff888019201200 RSP=ffff88801a0f7d88 R8 =0000000000000001 R9 =ffffed1003240292 R10=ffff888019201493 R11=0000000000000000 R12=ffff888008f92028 R13=0000000000000000 R14=ffff888019201428 R15=0000000000000000 RIP=ffffffff818d9895 RFL=00000212 [----A--] 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 00007f1930289900 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=00007fff8f53d000 CR3=000000000e748000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110011c4f8e RSP=ffff888008e27c60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806cf39518 R13=ffffffff8451751c R14=ffff888008d71fe8 R15=ffff888008d71b40 RIP=ffffffff812d86a2 RFL=00000047 [---Z-PC] 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=00007f3ad9e663a0 CR3=0000000019dd0000 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=2034313a30303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a30303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000