syzkaller login: [ 38.708218] BUG: Bad rss-counter state mm:000000004ee1356f type:MM_FILEPAGES val:33 [ 38.709841] BUG: Bad rss-counter state mm:000000004ee1356f type:MM_ANONPAGES val:22 [ 38.878118] ================================================================== [ 38.879277] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.880663] Read of size 8 at addr ffff888009668ed8 by task sshd/221 [ 38.881682] [ 38.881964] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884372] Call Trace: [ 38.884801] [ 38.885176] dump_stack_lvl+0x91/0xf0 [ 38.885801] print_report+0xcc/0x620 [ 38.886422] ? __virt_addr_valid+0x102/0x340 [ 38.887143] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887946] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888748] kasan_report+0xbe/0xf0 [ 38.889369] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890173] vma_interval_tree_remove+0xc75/0xec0 [ 38.890973] vma_prepare+0xc54/0x11a0 [ 38.891587] __split_vma+0x5af/0x950 [ 38.892204] ? __pfx___split_vma+0x10/0x10 [ 38.892892] ? find_held_lock+0x2c/0x110 [ 38.893590] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.894327] ? lock_is_held_type+0x9f/0x120 [ 38.895030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.895814] ? mtree_range_walk+0x632/0x900 [ 38.896537] ? mas_walk+0x5c7/0x7c0 [ 38.897153] do_vmi_munmap+0x1f1/0x2b0 [ 38.897799] mmap_region+0x1f9/0x2660 [ 38.898428] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.899088] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.900023] ? __pfx_lock_acquire+0x10/0x10 [ 38.900711] ? __pfx_mmap_region+0x10/0x10 [ 38.901418] ? security_mmap_addr+0x7d/0xa0 [ 38.902098] ? get_unmapped_area+0x1f5/0x3f0 [ 38.902814] do_mmap+0x854/0xf00 [ 38.903388] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.904033] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.904764] ksys_mmap_pgoff+0x3af/0x500 [ 38.905424] do_syscall_64+0x3f/0x90 [ 38.906041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906891] RIP: 0033:0x7f495fffed82 [ 38.907493] 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 [ 38.910290] RSP: 002b:00007ffc2aee10c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.911465] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f495fffed82 [ 38.912571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f495f438000 [ 38.913699] RBP: 00007f495f438000 R08: 0000000000000009 R09: 0000000000001000 [ 38.914806] R10: 0000000000000812 R11: 0000000000000206 R12: 000056261da86b20 [ 38.915922] R13: 00007ffc2aee10e0 R14: 00007ffc2aee1110 R15: 00007ffc2aee1470 [ 38.917043] [ 38.917434] [ 38.917717] Allocated by task 214: [ 38.918283] kasan_save_stack+0x22/0x50 [ 38.918929] kasan_set_track+0x25/0x30 [ 38.919562] __kasan_slab_alloc+0x59/0x70 [ 38.920233] kmem_cache_alloc+0x16b/0x370 [ 38.920893] vm_area_dup+0x20/0x160 [ 38.921492] __split_vma+0x170/0x950 [ 38.922113] split_vma+0xc6/0x110 [ 38.922676] mprotect_fixup+0x8d2/0xb30 [ 38.923335] do_mprotect_pkey+0x87e/0xd40 [ 38.924008] __x64_sys_mprotect+0x78/0xc0 [ 38.924681] do_syscall_64+0x3f/0x90 [ 38.925314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926142] [ 38.926412] Freed by task 214: [ 38.926925] kasan_save_stack+0x22/0x50 [ 38.927582] kasan_set_track+0x25/0x30 [ 38.928216] kasan_save_free_info+0x2b/0x50 [ 38.928908] __kasan_slab_free+0x10a/0x190 [ 38.929618] kmem_cache_free+0x10d/0x4d0 [ 38.930268] rcu_core+0x8c8/0x2860 [ 38.930859] __do_softirq+0x1b7/0x7d4 [ 38.931483] [ 38.931761] Last potentially related work creation: [ 38.932523] kasan_save_stack+0x22/0x50 [ 38.933197] __kasan_record_aux_stack+0x8e/0xa0 [ 38.933826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.934514] remove_vma+0x139/0x170 [ 38.934990] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.935584] do_vmi_munmap+0x1f1/0x2b0 [ 38.936101] __vm_munmap+0x138/0x3a0 [ 38.936593] __x64_sys_munmap+0x59/0x80 [ 38.937111] do_syscall_64+0x3f/0x90 [ 38.937638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938323] [ 38.938549] Second to last potentially related work creation: [ 38.939275] kasan_save_stack+0x22/0x50 [ 38.939820] __kasan_record_aux_stack+0x8e/0xa0 [ 38.940424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.941098] remove_vma+0x139/0x170 [ 38.941612] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.942207] do_vmi_munmap+0x1f1/0x2b0 [ 38.942728] mmap_region+0x1f9/0x2660 [ 38.943232] do_mmap+0x854/0xf00 [ 38.943690] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.944214] ksys_mmap_pgoff+0x3af/0x500 [ 38.944750] do_syscall_64+0x3f/0x90 [ 38.945256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945936] [ 38.946171] The buggy address belongs to the object at ffff888009668e80 [ 38.946171] which belongs to the cache vm_area_struct of size 168 [ 38.947737] The buggy address is located 88 bytes inside of [ 38.947737] freed 168-byte region [ffff888009668e80, ffff888009668f28) [ 38.949226] [ 38.949457] The buggy address belongs to the physical page: [ 38.950159] page:00000000f05cdc18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9668 [ 38.951309] memcg:ffff888015b3f001 [ 38.951761] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.952443] page_type: 0xffffffff() [ 38.952922] raw: 0100000000000200 ffff8880087a0c80 ffffea0000259b00 dead000000000002 [ 38.953911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b3f001 [ 38.954874] page dumped because: kasan: bad access detected [ 38.955572] [ 38.955799] Memory state around the buggy address: [ 38.956421] ffff888009668d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.957354] ffff888009668e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.958262] >ffff888009668e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.959160] ^ [ 38.959922] ffff888009668f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.960823] ffff888009668f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.961747] ================================================================== [ 38.963113] Disabling lock debugging due to kernel taint [ 41.091676] BUG: Bad rss-counter state mm:00000000beb38ad8 type:MM_FILEPAGES val:33 [ 41.093085] BUG: Bad rss-counter state mm:00000000beb38ad8 type:MM_ANONPAGES val:22 [ 41.597558] BUG: Bad rss-counter state mm:000000000d0988ee type:MM_FILEPAGES val:33 [ 41.598706] BUG: Bad rss-counter state mm:000000000d0988ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38864' (ECDSA) to the list of known hosts. 2023/06/20 15:04:13 fuzzer started 2023/06/20 15:04:13 dialing manager at localhost:36067 2023/06/20 15:04:13 checking machine... 2023/06/20 15:04:13 checking revisions... [ 42.245728] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:04:13 testing simple program... [ 42.297274] cgroup: Unknown subsys name 'net' [ 42.365313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:04:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed100d9c132e RSP=ffff88806ce09960 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88801a3062e0 RIP=ffffffff812d8a53 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 00007f14682a3700 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=00007f2e479290b0 CR3=000000000eb9c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732033313a3430 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323937 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800dd41cc0 RCX=0000000000000000 RDX=1ffff1100110bacc RSI=ffffffff836348e8 RDI=ffff888010397db0 RBP=ffff88800885d640 RSP=ffff888010397c10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888010397da8 R13=ffff88800f274500 R14=ffff88800885d660 R15=0000000000000001 RIP=ffffffff83634901 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 00007f3f02e6d900 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=00007f3f022fba70 CR3=000000000f34e000 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=1444f12b250865a70b4d913b76f65c73 XMM02=2c67c8bc2e329bc30000000000119ce0 XMM03=fb795ef6d65770560000000000120938 XMM04=fa48dc169c3d9c8500000000000ae988 XMM05=d1a351c0c2fc6fb10000000000132958 XMM06=c291bd5c70af25b90000000000131688 XMM07=e042d86d42eb936e0000000000120bb8 XMM08=775e1a1ed6d70fab0000000000119d40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000