syzkaller login: [ 30.658181] BUG: Bad rss-counter state mm:000000002fd8bd2d type:MM_FILEPAGES val:33 [ 30.659203] BUG: Bad rss-counter state mm:000000002fd8bd2d type:MM_ANONPAGES val:22 [ 30.817524] ================================================================== [ 30.818615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.819712] Read of size 8 at addr ffff88801bc32310 by task sshd/220 [ 30.820794] [ 30.821058] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.822090] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.823258] Call Trace: [ 30.823645] [ 30.823987] dump_stack_lvl+0x91/0xf0 [ 30.824577] print_report+0xcc/0x620 [ 30.825185] ? __virt_addr_valid+0x102/0x340 [ 30.825850] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.826482] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827112] kasan_report+0xbe/0xf0 [ 30.827599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828245] vma_interval_tree_remove+0xc75/0xec0 [ 30.828861] vma_prepare+0xc54/0x11a0 [ 30.829363] __split_vma+0x5af/0x950 [ 30.829841] ? __pfx___split_vma+0x10/0x10 [ 30.830377] ? find_held_lock+0x2c/0x110 [ 30.830906] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.831485] ? lock_is_held_type+0x9f/0x120 [ 30.832026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.832652] ? mtree_range_walk+0x632/0x900 [ 30.833220] ? mas_walk+0x5c7/0x7c0 [ 30.833702] do_vmi_munmap+0x1f1/0x2b0 [ 30.834209] mmap_region+0x1f9/0x2660 [ 30.834700] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.835244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.835994] ? __pfx_lock_acquire+0x10/0x10 [ 30.836551] ? __pfx_mmap_region+0x10/0x10 [ 30.837137] ? security_mmap_addr+0x7d/0xa0 [ 30.837696] ? get_unmapped_area+0x1f5/0x3f0 [ 30.838281] do_mmap+0x854/0xf00 [ 30.838737] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.839254] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.839842] ksys_mmap_pgoff+0x3af/0x500 [ 30.840379] do_syscall_64+0x3f/0x90 [ 30.840885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.841570] RIP: 0033:0x7fac761a1d82 [ 30.842043] 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 [ 30.844304] RSP: 002b:00007ffdff37ab18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.845279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac761a1d82 [ 30.846168] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac755db000 [ 30.847079] RBP: 00007fac755db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.847971] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4b3b9ab20 [ 30.848872] R13: 00007ffdff37ab30 R14: 00007ffdff37ab60 R15: 00007ffdff37aec0 [ 30.849772] [ 30.850087] [ 30.850310] Allocated by task 213: [ 30.850758] kasan_save_stack+0x22/0x50 [ 30.851292] kasan_set_track+0x25/0x30 [ 30.851816] __kasan_slab_alloc+0x59/0x70 [ 30.852369] kmem_cache_alloc+0x16b/0x370 [ 30.852930] vm_area_dup+0x20/0x160 [ 30.853407] __split_vma+0x170/0x950 [ 30.853892] split_vma+0xc6/0x110 [ 30.854363] mprotect_fixup+0x8d2/0xb30 [ 30.854892] do_mprotect_pkey+0x87e/0xd40 [ 30.855446] __x64_sys_mprotect+0x78/0xc0 [ 30.855997] do_syscall_64+0x3f/0x90 [ 30.856498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857200] [ 30.857430] Freed by task 213: [ 30.857847] kasan_save_stack+0x22/0x50 [ 30.858379] kasan_set_track+0x25/0x30 [ 30.858901] kasan_save_free_info+0x2b/0x50 [ 30.859457] __kasan_slab_free+0x10a/0x190 [ 30.860014] kmem_cache_free+0x10d/0x4d0 [ 30.860551] rcu_core+0x8c8/0x2860 [ 30.861029] __do_softirq+0x1b7/0x7d4 [ 30.861532] [ 30.861855] Last potentially related work creation: [ 30.862471] kasan_save_stack+0x22/0x50 [ 30.863013] __kasan_record_aux_stack+0x8e/0xa0 [ 30.863625] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.864302] remove_vma+0x139/0x170 [ 30.864793] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.865383] do_vmi_munmap+0x1f1/0x2b0 [ 30.865900] __vm_munmap+0x138/0x3a0 [ 30.866402] __x64_sys_munmap+0x59/0x80 [ 30.866925] do_syscall_64+0x3f/0x90 [ 30.867423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.868114] [ 30.868335] The buggy address belongs to the object at ffff88801bc322b8 [ 30.868335] which belongs to the cache vm_area_struct of size 168 [ 30.869918] The buggy address is located 88 bytes inside of [ 30.869918] freed 168-byte region [ffff88801bc322b8, ffff88801bc32360) [ 30.871420] [ 30.871646] The buggy address belongs to the physical page: [ 30.872346] page:00000000729ad74d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc32 [ 30.873521] memcg:ffff888019ccf101 [ 30.873970] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.874655] page_type: 0xffffffff() [ 30.875129] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.876100] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ccf101 [ 30.877085] page dumped because: kasan: bad access detected [ 30.877798] [ 30.878025] Memory state around the buggy address: [ 30.878637] ffff88801bc32200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.879535] ffff88801bc32280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.880440] >ffff88801bc32300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.881357] ^ [ 30.881856] ffff88801bc32380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.882761] ffff88801bc32400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.883669] ================================================================== [ 30.884634] Disabling lock debugging due to kernel taint [ 32.774002] BUG: Bad rss-counter state mm:00000000aa171e2d type:MM_FILEPAGES val:33 [ 32.774951] BUG: Bad rss-counter state mm:00000000aa171e2d type:MM_ANONPAGES val:22 [ 33.283379] BUG: Bad rss-counter state mm:000000008abf7cfb type:MM_FILEPAGES val:33 [ 33.285078] BUG: Bad rss-counter state mm:000000008abf7cfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13433' (ECDSA) to the list of known hosts. 2023/06/20 19:13:08 fuzzer started 2023/06/20 19:13:08 dialing manager at localhost:36067 2023/06/20 19:13:08 checking machine... 2023/06/20 19:13:08 checking revisions... [ 34.029192] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:13:09 testing simple program... [ 34.076742] cgroup: Unknown subsys name 'net' [ 34.139348] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:13:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017487828 RCX=ffff888017487830 RDX=1ffff11002e90ef2 RSI=1ffff11002e90ef4 RDI=ffff888017487790 RBP=dffffc0000000000 RSP=ffff888017487718 R8 =0000000000000000 R9 =0000000000000000 R10=ffff888017487790 R11=0000000000040000 R12=ffffed1002e90ef4 R13=ffffed1002e90ef3 R14=ffff8880174877d8 R15=ffff888017487790 RIP=ffffffff811305f0 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 00007f07b0060900 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=00007f07b06180b0 CR3=000000000c4e4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000008 RCX=0000000000000000 RDX=1ffff11001fa6b55 RSI=ffffffff818e825e RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888017487e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800cb76a00 R13=ffff88800fd35aa0 R14=ffff88800fd35aa8 R15=dffffc0000000000 RIP=ffffffff818e8277 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 00007f07b0060900 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=00007f096d8eb9d0 CR3=000000000c4e4000 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=2038303a33313a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a33313a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000