syzkaller login: [ 31.711198] BUG: Bad rss-counter state mm:00000000a3fd98ea type:MM_FILEPAGES val:33 [ 31.712262] BUG: Bad rss-counter state mm:00000000a3fd98ea type:MM_ANONPAGES val:22 [ 31.891518] ================================================================== [ 31.892506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.893520] Read of size 8 at addr ffff8880166fdd08 by task sshd/219 [ 31.894462] [ 31.894703] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.895668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.896742] Call Trace: [ 31.897085] [ 31.897399] dump_stack_lvl+0x91/0xf0 [ 31.897944] print_report+0xcc/0x620 [ 31.898478] ? __virt_addr_valid+0x102/0x340 [ 31.899103] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.899770] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.900460] kasan_report+0xbe/0xf0 [ 31.900975] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.901666] vma_interval_tree_remove+0xc75/0xec0 [ 31.902333] vma_prepare+0xc54/0x11a0 [ 31.902872] __split_vma+0x5af/0x950 [ 31.903401] ? __pfx___split_vma+0x10/0x10 [ 31.903984] ? find_held_lock+0x2c/0x110 [ 31.904560] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.905191] ? lock_is_held_type+0x9f/0x120 [ 31.905790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.906467] ? mtree_range_walk+0x632/0x900 [ 31.907104] ? mas_walk+0x5c7/0x7c0 [ 31.907636] do_vmi_munmap+0x1f1/0x2b0 [ 31.908185] mmap_region+0x1f9/0x2660 [ 31.908721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.909272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.910035] ? __pfx_lock_acquire+0x10/0x10 [ 31.910612] ? __pfx_mmap_region+0x10/0x10 [ 31.911192] ? security_mmap_addr+0x7d/0xa0 [ 31.911765] ? get_unmapped_area+0x1f5/0x3f0 [ 31.912356] do_mmap+0x854/0xf00 [ 31.912830] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.913362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.913960] ksys_mmap_pgoff+0x3af/0x500 [ 31.914503] do_syscall_64+0x3f/0x90 [ 31.915018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.915718] RIP: 0033:0x7f3f469a9d82 [ 31.916205] 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 [ 31.918498] RSP: 002b:00007ffd272e4768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.919509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f469a9d82 [ 31.920441] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f45de3000 [ 31.921371] RBP: 00007f3f45de3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.922304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e753b06ec0 [ 31.923242] R13: 00007ffd272e4780 R14: 00007ffd272e47b0 R15: 00007ffd272e4b10 [ 31.924191] [ 31.924511] [ 31.924744] Allocated by task 212: [ 31.925215] kasan_save_stack+0x22/0x50 [ 31.925767] kasan_set_track+0x25/0x30 [ 31.926311] __kasan_slab_alloc+0x59/0x70 [ 31.926901] kmem_cache_alloc+0x16b/0x370 [ 31.927468] vm_area_dup+0x20/0x160 [ 31.927964] __split_vma+0x170/0x950 [ 31.928471] split_vma+0xc6/0x110 [ 31.928948] mprotect_fixup+0x8d2/0xb30 [ 31.929503] do_mprotect_pkey+0x87e/0xd40 [ 31.930078] __x64_sys_mprotect+0x78/0xc0 [ 31.930657] do_syscall_64+0x3f/0x90 [ 31.931190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.931884] [ 31.932119] Freed by task 202: [ 31.932543] kasan_save_stack+0x22/0x50 [ 31.933095] kasan_set_track+0x25/0x30 [ 31.933627] kasan_save_free_info+0x2b/0x50 [ 31.934218] __kasan_slab_free+0x10a/0x190 [ 31.934793] kmem_cache_free+0x10d/0x4d0 [ 31.935373] rcu_core+0x8c8/0x2860 [ 31.935860] __do_softirq+0x1b7/0x7d4 [ 31.936378] [ 31.936609] Last potentially related work creation: [ 31.937247] kasan_save_stack+0x22/0x50 [ 31.937799] __kasan_record_aux_stack+0x8e/0xa0 [ 31.938430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.939149] remove_vma+0x139/0x170 [ 31.939638] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.940245] do_vmi_munmap+0x1f1/0x2b0 [ 31.940767] __vm_munmap+0x138/0x3a0 [ 31.941277] __x64_sys_munmap+0x59/0x80 [ 31.941815] do_syscall_64+0x3f/0x90 [ 31.942330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.943040] [ 31.943270] The buggy address belongs to the object at ffff8880166fdcb0 [ 31.943270] which belongs to the cache vm_area_struct of size 168 [ 31.944853] The buggy address is located 88 bytes inside of [ 31.944853] freed 168-byte region [ffff8880166fdcb0, ffff8880166fdd58) [ 31.946366] [ 31.946600] The buggy address belongs to the physical page: [ 31.947323] page:00000000bf7f18fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166fd [ 31.948519] memcg:ffff888016835201 [ 31.948976] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.949738] page_type: 0xffffffff() [ 31.950227] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a9140 0000000000000003 [ 31.951237] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016835201 [ 31.952232] page dumped because: kasan: bad access detected [ 31.952945] [ 31.953182] Memory state around the buggy address: [ 31.953811] ffff8880166fdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.954735] ffff8880166fdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.955666] >ffff8880166fdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.956579] ^ [ 31.957049] ffff8880166fdd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.957963] ffff8880166fde00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.958885] ================================================================== [ 31.960128] Disabling lock debugging due to kernel taint [ 34.381440] BUG: Bad rss-counter state mm:0000000073837c36 type:MM_FILEPAGES val:33 [ 34.382498] BUG: Bad rss-counter state mm:0000000073837c36 type:MM_ANONPAGES val:22 [ 34.831939] BUG: Bad rss-counter state mm:000000006f4ca6c1 type:MM_FILEPAGES val:33 [ 34.833112] BUG: Bad rss-counter state mm:000000006f4ca6c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55753' (ECDSA) to the list of known hosts. 2023/06/21 01:28:57 fuzzer started 2023/06/21 01:28:57 dialing manager at localhost:36067 2023/06/21 01:28:58 checking machine... 2023/06/21 01:28:58 checking revisions... [ 35.501106] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:28:58 testing simple program... [ 35.547511] cgroup: Unknown subsys name 'net' [ 35.602621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:28:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd5edf17f8 CR3=000000000eb50000 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=2037353a38323a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a38323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002d03f2a RSP=ffff88801681f930 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff8189dc57 R14=ffff88801681fb40 R15=ffff88801681fb20 RIP=ffffffff8135b980 RFL=00000286 [--S--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 00007fb052551900 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=00007fb052b06650 CR3=000000000ca76000 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=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