syzkaller login: [ 30.661260] BUG: Bad rss-counter state mm:0000000071c7bb4e type:MM_FILEPAGES val:33 [ 30.662524] BUG: Bad rss-counter state mm:0000000071c7bb4e type:MM_ANONPAGES val:22 [ 30.807326] ================================================================== [ 30.808254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.809203] Read of size 8 at addr ffff888016991df0 by task sshd/220 [ 30.809996] [ 30.810300] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.811165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.812154] Call Trace: [ 30.812492] [ 30.812783] dump_stack_lvl+0x91/0xf0 [ 30.813274] print_report+0xcc/0x620 [ 30.813768] ? __virt_addr_valid+0x102/0x340 [ 30.814323] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.814949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.815572] kasan_report+0xbe/0xf0 [ 30.816051] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.816677] vma_interval_tree_remove+0xc75/0xec0 [ 30.817293] vma_prepare+0xc54/0x11a0 [ 30.817785] __split_vma+0x5af/0x950 [ 30.818260] ? __pfx___split_vma+0x10/0x10 [ 30.818793] ? find_held_lock+0x2c/0x110 [ 30.819317] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.819896] ? lock_is_held_type+0x9f/0x120 [ 30.820442] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.821057] ? mtree_range_walk+0x632/0x900 [ 30.821610] ? mas_walk+0x5c7/0x7c0 [ 30.822119] do_vmi_munmap+0x1f1/0x2b0 [ 30.822615] mmap_region+0x1f9/0x2660 [ 30.823116] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.823638] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.824360] ? __pfx_lock_acquire+0x10/0x10 [ 30.824894] ? __pfx_mmap_region+0x10/0x10 [ 30.825423] ? security_mmap_addr+0x7d/0xa0 [ 30.825958] ? get_unmapped_area+0x1f5/0x3f0 [ 30.826511] do_mmap+0x854/0xf00 [ 30.826950] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.827446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.828009] ksys_mmap_pgoff+0x3af/0x500 [ 30.828523] do_syscall_64+0x3f/0x90 [ 30.829015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.829674] RIP: 0033:0x7f13e3a59d82 [ 30.830134] 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 [ 30.832286] RSP: 002b:00007fffeecc87e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.833211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13e3a59d82 [ 30.834081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13e2e93000 [ 30.834931] RBP: 00007f13e2e93000 R08: 0000000000000009 R09: 0000000000001000 [ 30.835778] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591d899bec0 [ 30.836643] R13: 00007fffeecc8800 R14: 00007fffeecc8830 R15: 00007fffeecc8b90 [ 30.837513] [ 30.837816] [ 30.838030] Allocated by task 213: [ 30.838455] kasan_save_stack+0x22/0x50 [ 30.838968] kasan_set_track+0x25/0x30 [ 30.839463] __kasan_slab_alloc+0x59/0x70 [ 30.839990] kmem_cache_alloc+0x16b/0x370 [ 30.840510] vm_area_dup+0x20/0x160 [ 30.840970] __split_vma+0x170/0x950 [ 30.841440] split_vma+0xc6/0x110 [ 30.841888] mprotect_fixup+0x8d2/0xb30 [ 30.842395] do_mprotect_pkey+0x87e/0xd40 [ 30.842915] __x64_sys_mprotect+0x78/0xc0 [ 30.843448] do_syscall_64+0x3f/0x90 [ 30.843932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.844574] [ 30.844787] Freed by task 213: [ 30.845181] kasan_save_stack+0x22/0x50 [ 30.845708] kasan_set_track+0x25/0x30 [ 30.846214] kasan_save_free_info+0x2b/0x50 [ 30.846745] __kasan_slab_free+0x10a/0x190 [ 30.847284] kmem_cache_free+0x10d/0x4d0 [ 30.847797] rcu_core+0x8c8/0x2860 [ 30.848239] __do_softirq+0x1b7/0x7d4 [ 30.848726] [ 30.848940] Last potentially related work creation: [ 30.849523] kasan_save_stack+0x22/0x50 [ 30.850044] __kasan_record_aux_stack+0x8e/0xa0 [ 30.850619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.851260] remove_vma+0x139/0x170 [ 30.851722] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.852283] do_vmi_munmap+0x1f1/0x2b0 [ 30.852767] __vm_munmap+0x138/0x3a0 [ 30.853239] __x64_sys_munmap+0x59/0x80 [ 30.853758] do_syscall_64+0x3f/0x90 [ 30.854250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.854900] [ 30.855116] The buggy address belongs to the object at ffff888016991d98 [ 30.855116] which belongs to the cache vm_area_struct of size 168 [ 30.856594] The buggy address is located 88 bytes inside of [ 30.856594] freed 168-byte region [ffff888016991d98, ffff888016991e40) [ 30.858025] [ 30.858244] The buggy address belongs to the physical page: [ 30.858913] page:000000003d713994 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16991 [ 30.860012] memcg:ffff88800e5b0b01 [ 30.860442] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.861092] page_type: 0xffffffff() [ 30.861554] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.862485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5b0b01 [ 30.863395] page dumped because: kasan: bad access detected [ 30.864057] [ 30.864281] Memory state around the buggy address: [ 30.864868] ffff888016991c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.865744] ffff888016991d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.866594] >ffff888016991d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.867464] ^ [ 30.868280] ffff888016991e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.869148] ffff888016991e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.870010] ================================================================== [ 30.870992] Disabling lock debugging due to kernel taint [ 32.849539] BUG: Bad rss-counter state mm:000000002f76f464 type:MM_FILEPAGES val:33 [ 32.850567] BUG: Bad rss-counter state mm:000000002f76f464 type:MM_ANONPAGES val:22 [ 33.399340] BUG: Bad rss-counter state mm:0000000071171233 type:MM_FILEPAGES val:33 [ 33.400493] BUG: Bad rss-counter state mm:0000000071171233 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56532' (ECDSA) to the list of known hosts. 2023/06/21 02:40:16 fuzzer started 2023/06/21 02:40:17 dialing manager at localhost:36067 2023/06/21 02:40:17 checking machine... 2023/06/21 02:40:17 checking revisions... [ 34.031109] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:40:17 testing simple program... [ 34.086857] cgroup: Unknown subsys name 'net' [ 34.140103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:40:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888015c90520 RCX=0000000000000000 RDX=ffff88800f94b680 RSI=ffffffff818ea6f4 RDI=0000000000000005 RBP=0000000000000008 RSP=ffff888014617ed8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800d660c80 R13=0000000000000000 R14=0000000000000001 R15=0000000000000008 RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 00007fb9c03ab900 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=00007ffc6bbbc000 CR3=000000001987c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fa91e7f6358 CR3=0000000009096000 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=2036313a30343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a30343a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000