syzkaller login: [ 33.065523] BUG: Bad rss-counter state mm:00000000a953f403 type:MM_FILEPAGES val:33 [ 33.066678] BUG: Bad rss-counter state mm:00000000a953f403 type:MM_ANONPAGES val:22 [ 33.185060] ================================================================== [ 33.185722] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.186412] Read of size 8 at addr ffff88800dfe35c8 by task sshd/220 [ 33.186979] [ 33.187134] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.187764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.188464] Call Trace: [ 33.188700] [ 33.188913] dump_stack_lvl+0x91/0xf0 [ 33.189443] print_report+0xcc/0x620 [ 33.189797] ? __virt_addr_valid+0x102/0x340 [ 33.190193] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.190644] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.191099] kasan_report+0xbe/0xf0 [ 33.191489] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.191945] vma_interval_tree_remove+0xc75/0xec0 [ 33.192386] vma_prepare+0xc54/0x11a0 [ 33.192744] __split_vma+0x5af/0x950 [ 33.193106] ? __pfx___split_vma+0x10/0x10 [ 33.193489] ? find_held_lock+0x2c/0x110 [ 33.193873] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.194283] ? lock_is_held_type+0x9f/0x120 [ 33.194665] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.195100] ? mtree_range_walk+0x632/0x900 [ 33.195495] ? mas_walk+0x5c7/0x7c0 [ 33.195834] do_vmi_munmap+0x1f1/0x2b0 [ 33.196182] mmap_region+0x1f9/0x2660 [ 33.196522] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.196898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.197400] ? __pfx_lock_acquire+0x10/0x10 [ 33.197775] ? __pfx_mmap_region+0x10/0x10 [ 33.198150] ? security_mmap_addr+0x7d/0xa0 [ 33.198533] ? get_unmapped_area+0x1f5/0x3f0 [ 33.198925] do_mmap+0x854/0xf00 [ 33.199235] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.199590] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.199996] ksys_mmap_pgoff+0x3af/0x500 [ 33.200359] do_syscall_64+0x3f/0x90 [ 33.200699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.201172] RIP: 0033:0x7fba35ddbd82 [ 33.201497] 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 [ 33.203004] RSP: 002b:00007ffe7e531418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.203649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba35ddbd82 [ 33.204249] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba35215000 [ 33.204865] RBP: 00007fba35215000 R08: 0000000000000009 R09: 0000000000001000 [ 33.205460] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561022c45ec0 [ 33.206056] R13: 00007ffe7e531430 R14: 00007ffe7e531460 R15: 00007ffe7e5317c0 [ 33.206659] [ 33.206866] [ 33.207021] Allocated by task 213: [ 33.207322] kasan_save_stack+0x22/0x50 [ 33.207683] kasan_set_track+0x25/0x30 [ 33.208031] __kasan_slab_alloc+0x59/0x70 [ 33.208399] kmem_cache_alloc+0x16b/0x370 [ 33.208766] vm_area_dup+0x20/0x160 [ 33.209053] __split_vma+0x170/0x950 [ 33.209314] split_vma+0xc6/0x110 [ 33.209560] mprotect_fixup+0x8d2/0xb30 [ 33.209835] do_mprotect_pkey+0x87e/0xd40 [ 33.210135] __x64_sys_mprotect+0x78/0xc0 [ 33.210420] do_syscall_64+0x3f/0x90 [ 33.210684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.211035] [ 33.211156] Freed by task 203: [ 33.211382] kasan_save_stack+0x22/0x50 [ 33.211673] kasan_set_track+0x25/0x30 [ 33.211951] kasan_save_free_info+0x2b/0x50 [ 33.212248] __kasan_slab_free+0x10a/0x190 [ 33.212546] kmem_cache_free+0x10d/0x4d0 [ 33.212840] rcu_core+0x8c8/0x2860 [ 33.213096] __do_softirq+0x1b7/0x7d4 [ 33.213369] [ 33.213489] Last potentially related work creation: [ 33.213822] kasan_save_stack+0x22/0x50 [ 33.214108] __kasan_record_aux_stack+0x8e/0xa0 [ 33.214431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.214792] remove_vma+0x139/0x170 [ 33.215046] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.215360] do_vmi_munmap+0x1f1/0x2b0 [ 33.215631] __vm_munmap+0x138/0x3a0 [ 33.215891] __x64_sys_munmap+0x59/0x80 [ 33.216164] do_syscall_64+0x3f/0x90 [ 33.216423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.216778] [ 33.216909] Second to last potentially related work creation: [ 33.217298] kasan_save_stack+0x22/0x50 [ 33.217581] __kasan_record_aux_stack+0x8e/0xa0 [ 33.217897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.218255] remove_vma+0x139/0x170 [ 33.218507] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.218826] do_vmi_munmap+0x1f1/0x2b0 [ 33.219101] mmap_region+0x1f9/0x2660 [ 33.219365] do_mmap+0x854/0xf00 [ 33.219606] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.219877] ksys_mmap_pgoff+0x3af/0x500 [ 33.220151] do_syscall_64+0x3f/0x90 [ 33.220419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.220769] [ 33.220897] The buggy address belongs to the object at ffff88800dfe3570 [ 33.220897] which belongs to the cache vm_area_struct of size 168 [ 33.221725] The buggy address is located 88 bytes inside of [ 33.221725] freed 168-byte region [ffff88800dfe3570, ffff88800dfe3618) [ 33.222497] [ 33.222620] The buggy address belongs to the physical page: [ 33.222993] page:00000000d4aa4423 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe3 [ 33.223597] memcg:ffff88800ef02501 [ 33.223839] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.224194] page_type: 0xffffffff() [ 33.224445] raw: 0100000000000200 ffff88800879fc80 ffffea0000326440 dead000000000002 [ 33.224966] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef02501 [ 33.225472] page dumped because: kasan: bad access detected [ 33.225839] [ 33.225956] Memory state around the buggy address: [ 33.226280] ffff88800dfe3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.226761] ffff88800dfe3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.227234] >ffff88800dfe3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.227712] ^ [ 33.228083] ffff88800dfe3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.228574] ffff88800dfe3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.229047] ================================================================== [ 33.229564] Disabling lock debugging due to kernel taint [ 35.243408] BUG: Bad rss-counter state mm:000000009bd4af17 type:MM_FILEPAGES val:33 [ 35.244577] BUG: Bad rss-counter state mm:000000009bd4af17 type:MM_ANONPAGES val:22 [ 35.617840] BUG: Bad rss-counter state mm:0000000087d1d022 type:MM_FILEPAGES val:33 [ 35.618868] BUG: Bad rss-counter state mm:0000000087d1d022 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63613' (ECDSA) to the list of known hosts. 2023/06/20 01:20:24 fuzzer started 2023/06/20 01:20:24 dialing manager at localhost:44161 2023/06/20 01:20:24 checking machine... 2023/06/20 01:20:24 checking revisions... [ 36.303271] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:20:24 testing simple program... [ 36.349039] cgroup: Unknown subsys name 'net' [ 36.387176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:20:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880146a3680 RSI=ffffffff8366dfd0 RDI=0000000000000001 RBP=ffff88801a7a6a00 RSP=ffff88800d987978 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff83c22ffc R13=ffff88800fc5b500 R14=ffff88800d987a88 R15=ffff88801a7a6a00 RIP=ffffffff814c081b 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 00007f26429ac900 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=00007f0b84877650 CR3=0000000008db2000 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=cf12ff96867b728a144d8183772c7cc0 XMM02=eff9b2d0a8fce9cb000000000011eb28 XMM03=2c67c8bc2e329bc3000000000011ec70 XMM04=50f96fe70764243300000000000ae988 XMM05=0d563fa494becc4a0000000000137ea8 XMM06=19e9129bd510f2350000000000136d98 XMM07=fb795ef6d65770560000000000126588 XMM08=2c67c8bc2e329bc3000000000011ec70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffde76b78a8 CR3=000000000e5c4000 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=2034323a30323a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a30323a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000