syzkaller login: [ 32.342882] BUG: Bad rss-counter state mm:0000000003eb7223 type:MM_FILEPAGES val:33 [ 32.343783] BUG: Bad rss-counter state mm:0000000003eb7223 type:MM_ANONPAGES val:22 [ 32.477823] ================================================================== [ 32.478925] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.480069] Read of size 8 at addr ffff88800de88310 by task sshd/220 [ 32.481134] [ 32.481391] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.482436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.483640] Call Trace: [ 32.484020] [ 32.484357] dump_stack_lvl+0x91/0xf0 [ 32.484936] print_report+0xcc/0x620 [ 32.485511] ? __virt_addr_valid+0x102/0x340 [ 32.486183] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.486918] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.487579] kasan_report+0xbe/0xf0 [ 32.488030] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.488626] vma_interval_tree_remove+0xc75/0xec0 [ 32.489300] vma_prepare+0xc54/0x11a0 [ 32.489874] __split_vma+0x5af/0x950 [ 32.490352] ? __pfx___split_vma+0x10/0x10 [ 32.491033] ? find_held_lock+0x2c/0x110 [ 32.491677] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.492372] ? lock_is_held_type+0x9f/0x120 [ 32.493006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.493687] ? mtree_range_walk+0x632/0x900 [ 32.494361] ? mas_walk+0x5c7/0x7c0 [ 32.494938] do_vmi_munmap+0x1f1/0x2b0 [ 32.495526] mmap_region+0x1f9/0x2660 [ 32.496107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.496716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.497566] ? __pfx_lock_acquire+0x10/0x10 [ 32.498213] ? __pfx_mmap_region+0x10/0x10 [ 32.498853] ? security_mmap_addr+0x7d/0xa0 [ 32.499492] ? get_unmapped_area+0x1f5/0x3f0 [ 32.500160] do_mmap+0x854/0xf00 [ 32.500683] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.501279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.501951] ksys_mmap_pgoff+0x3af/0x500 [ 32.502575] do_syscall_64+0x3f/0x90 [ 32.503160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.503942] RIP: 0033:0x7fdbc8547d82 [ 32.504495] 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 [ 32.507093] RSP: 002b:00007ffd0eef8248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.508179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbc8547d82 [ 32.509202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbc7981000 [ 32.510223] RBP: 00007fdbc7981000 R08: 0000000000000009 R09: 0000000000001000 [ 32.511262] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c68ec3d90 [ 32.512300] R13: 00007ffd0eef8260 R14: 00007ffd0eef8290 R15: 00007ffd0eef85f0 [ 32.513341] [ 32.513686] [ 32.513938] Allocated by task 213: [ 32.514461] kasan_save_stack+0x22/0x50 [ 32.515092] kasan_set_track+0x25/0x30 [ 32.515683] __kasan_slab_alloc+0x59/0x70 [ 32.516308] kmem_cache_alloc+0x16b/0x370 [ 32.516933] vm_area_dup+0x20/0x160 [ 32.517477] __split_vma+0x170/0x950 [ 32.518033] split_vma+0xc6/0x110 [ 32.518565] mprotect_fixup+0x8d2/0xb30 [ 32.519164] do_mprotect_pkey+0x87e/0xd40 [ 32.519780] __x64_sys_mprotect+0x78/0xc0 [ 32.520402] do_syscall_64+0x3f/0x90 [ 32.520965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.521777] [ 32.522034] Freed by task 19: [ 32.522496] kasan_save_stack+0x22/0x50 [ 32.523128] kasan_set_track+0x25/0x30 [ 32.523722] kasan_save_free_info+0x2b/0x50 [ 32.524368] __kasan_slab_free+0x10a/0x190 [ 32.525010] kmem_cache_free+0x10d/0x4d0 [ 32.525542] rcu_core+0x8c8/0x2860 [ 32.525967] __do_softirq+0x1b7/0x7d4 [ 32.526423] [ 32.526637] Last potentially related work creation: [ 32.527186] kasan_save_stack+0x22/0x50 [ 32.527702] __kasan_record_aux_stack+0x8e/0xa0 [ 32.528295] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.528940] remove_vma+0x139/0x170 [ 32.529405] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.529977] do_vmi_munmap+0x1f1/0x2b0 [ 32.530462] __vm_munmap+0x138/0x3a0 [ 32.530949] __x64_sys_munmap+0x59/0x80 [ 32.531441] do_syscall_64+0x3f/0x90 [ 32.531922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.532554] [ 32.532774] The buggy address belongs to the object at ffff88800de882b8 [ 32.532774] which belongs to the cache vm_area_struct of size 168 [ 32.534236] The buggy address is located 88 bytes inside of [ 32.534236] freed 168-byte region [ffff88800de882b8, ffff88800de88360) [ 32.535756] [ 32.535990] The buggy address belongs to the physical page: [ 32.536704] page:0000000067b149e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde88 [ 32.537848] memcg:ffff88801033f301 [ 32.538305] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.539003] page_type: 0xffffffff() [ 32.539475] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.540453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801033f301 [ 32.541410] page dumped because: kasan: bad access detected [ 32.542115] [ 32.542342] Memory state around the buggy address: [ 32.542986] ffff88800de88200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.543895] ffff88800de88280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.544817] >ffff88800de88300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.545720] ^ [ 32.546215] ffff88800de88380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.547142] ffff88800de88400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.548045] ================================================================== [ 32.549132] Disabling lock debugging due to kernel taint [ 34.563921] BUG: Bad rss-counter state mm:00000000c57516f3 type:MM_FILEPAGES val:33 [ 34.565197] BUG: Bad rss-counter state mm:00000000c57516f3 type:MM_ANONPAGES val:22 [ 35.004199] BUG: Bad rss-counter state mm:0000000074aac3e7 type:MM_FILEPAGES val:33 [ 35.005506] BUG: Bad rss-counter state mm:0000000074aac3e7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10673' (ECDSA) to the list of known hosts. 2023/06/20 01:12:59 fuzzer started 2023/06/20 01:12:59 dialing manager at localhost:44161 2023/06/20 01:12:59 checking machine... 2023/06/20 01:12:59 checking revisions... [ 35.623913] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:12:59 testing simple program... [ 35.673213] cgroup: Unknown subsys name 'net' [ 35.732357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85fa4870 RCX=ffffffff83646a96 RDX=0000000000000000 RSI=ffffffff863b32b0 RDI=ffffffff85fa486c RBP=ffffffff85fa486c RSP=ffff8880162678a8 R8 =ffffffff863b32b0 R9 =ffff8880162679a0 R10=0000000000038001 R11=000000000008ad26 R12=ffffffff85fa486c R13=ffffffff85fa486c R14=ffffffff85fa486c R15=dffffc0000000000 RIP=ffffffff8112fc5d 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 00007fc29533a900 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=00007ffceb953000 CR3=000000000c556000 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=0000000080010001 RBX=ffffffff813fc4c0 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff813c03b8 RDI=0000000000000001 RBP=ffff88806cf2ba08 RSP=ffff88806cf09e48 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806cf09ff8 R12=ffff88806cf2c250 R13=ffff88806cf2b940 R14=ffff88806cf2b9c0 R15=dffffc0000000000 RIP=ffffffff813c03b8 RFL=00000046 [---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 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=00007f0af69f93d0 CR3=000000000f1f6000 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=d1ae303e1888e799ef46976ba949b400 XMM02=2c67c8bc2e329bc3000000000011c038 XMM03=fb795ef6d65770560000000000123980 XMM04=16ba7f2b5b6b9fcb00000000000ae988 XMM05=19e9129bd510f2350000000000133508 XMM06=455368f7be29f3e10000000000132370 XMM07=e042d86d42eb936e0000000000123c00 XMM08=39d5128cfd70f439000000000011c098 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000