syzkaller login: [ 36.158474] BUG: Bad rss-counter state mm:0000000058b9c214 type:MM_FILEPAGES val:33 [ 36.159182] BUG: Bad rss-counter state mm:0000000058b9c214 type:MM_ANONPAGES val:22 [ 36.192555] ================================================================== [ 36.193346] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.193955] Read of size 8 at addr ffff88800e6ead08 by task sshd/219 [ 36.194427] [ 36.194562] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.195085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.195660] Call Trace: [ 36.195873] [ 36.196050] dump_stack_lvl+0x91/0xf0 [ 36.196366] print_report+0xcc/0x620 [ 36.196669] ? __virt_addr_valid+0x102/0x340 [ 36.197008] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.197386] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.197761] kasan_report+0xbe/0xf0 [ 36.198055] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.198437] vma_interval_tree_remove+0xc75/0xec0 [ 36.198810] vma_prepare+0xc54/0x11a0 [ 36.199113] __split_vma+0x5af/0x950 [ 36.199419] ? __pfx___split_vma+0x10/0x10 [ 36.199804] ? find_held_lock+0x2c/0x110 [ 36.200150] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.200526] ? lock_is_held_type+0x9f/0x120 [ 36.200875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.201278] ? mtree_range_walk+0x632/0x900 [ 36.201634] ? mas_walk+0x5c7/0x7c0 [ 36.201943] do_vmi_munmap+0x1f1/0x2b0 [ 36.202282] mmap_region+0x1f9/0x2660 [ 36.202607] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.202944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.203444] ? __pfx_lock_acquire+0x10/0x10 [ 36.203859] ? __pfx_mmap_region+0x10/0x10 [ 36.204213] ? security_mmap_addr+0x7d/0xa0 [ 36.204574] ? get_unmapped_area+0x1f5/0x3f0 [ 36.204952] do_mmap+0x854/0xf00 [ 36.205241] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.205559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.205911] ksys_mmap_pgoff+0x3af/0x500 [ 36.206243] do_syscall_64+0x3f/0x90 [ 36.206550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.206964] RIP: 0033:0x7ff598145d82 [ 36.207256] 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 [ 36.208693] RSP: 002b:00007ffe411bb1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.209292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff598145d82 [ 36.209845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff59757f000 [ 36.210411] RBP: 00007ff59757f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.210971] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c58c0eaec0 [ 36.211520] R13: 00007ffe411bb1f0 R14: 00007ffe411bb220 R15: 00007ffe411bb580 [ 36.212125] [ 36.212353] [ 36.212503] Allocated by task 212: [ 36.212785] kasan_save_stack+0x22/0x50 [ 36.213116] kasan_set_track+0x25/0x30 [ 36.213435] __kasan_slab_alloc+0x59/0x70 [ 36.213773] kmem_cache_alloc+0x16b/0x370 [ 36.214121] vm_area_dup+0x20/0x160 [ 36.214424] __split_vma+0x170/0x950 [ 36.214734] split_vma+0xc6/0x110 [ 36.215018] mprotect_fixup+0x8d2/0xb30 [ 36.215339] do_mprotect_pkey+0x87e/0xd40 [ 36.215674] __x64_sys_mprotect+0x78/0xc0 [ 36.216043] do_syscall_64+0x3f/0x90 [ 36.216344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.216762] [ 36.216898] Freed by task 212: [ 36.217152] kasan_save_stack+0x22/0x50 [ 36.217475] kasan_set_track+0x25/0x30 [ 36.217787] kasan_save_free_info+0x2b/0x50 [ 36.218126] __kasan_slab_free+0x10a/0x190 [ 36.218461] kmem_cache_free+0x10d/0x4d0 [ 36.218777] rcu_core+0x8c8/0x2860 [ 36.219058] __do_softirq+0x1b7/0x7d4 [ 36.219363] [ 36.219501] Last potentially related work creation: [ 36.219923] kasan_save_stack+0x22/0x50 [ 36.220259] __kasan_record_aux_stack+0x8e/0xa0 [ 36.220627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.221039] remove_vma+0x139/0x170 [ 36.221331] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.221937] do_vmi_munmap+0x1f1/0x2b0 [ 36.222310] __vm_munmap+0x138/0x3a0 [ 36.222622] __x64_sys_munmap+0x59/0x80 [ 36.222941] do_syscall_64+0x3f/0x90 [ 36.223256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.223680] [ 36.223835] The buggy address belongs to the object at ffff88800e6eacb0 [ 36.223835] which belongs to the cache vm_area_struct of size 168 [ 36.224843] The buggy address is located 88 bytes inside of [ 36.224843] freed 168-byte region [ffff88800e6eacb0, ffff88800e6ead58) [ 36.225760] [ 36.225897] The buggy address belongs to the physical page: [ 36.226325] page:000000006625fc64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6ea [ 36.227074] memcg:ffff88800e4dcf01 [ 36.227350] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.227808] page_type: 0xffffffff() [ 36.228101] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.228687] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4dcf01 [ 36.229272] page dumped because: kasan: bad access detected [ 36.229718] [ 36.229854] Memory state around the buggy address: [ 36.230235] ffff88800e6eac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.230784] ffff88800e6eac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.231346] >ffff88800e6ead00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.231904] ^ [ 36.232192] ffff88800e6ead80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.232736] ffff88800e6eae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.233300] ================================================================== [ 36.234242] Disabling lock debugging due to kernel taint [ 38.198131] BUG: Bad rss-counter state mm:000000001885b29f type:MM_FILEPAGES val:33 [ 38.199535] BUG: Bad rss-counter state mm:000000001885b29f type:MM_ANONPAGES val:22 [ 38.580167] BUG: Bad rss-counter state mm:00000000456424f6 type:MM_FILEPAGES val:33 [ 38.581254] BUG: Bad rss-counter state mm:00000000456424f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14242' (ECDSA) to the list of known hosts. 2023/06/20 09:46:47 fuzzer started 2023/06/20 09:46:47 dialing manager at localhost:44161 2023/06/20 09:46:47 checking machine... 2023/06/20 09:46:47 checking revisions... [ 39.181838] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:46:47 testing simple program... [ 39.219466] cgroup: Unknown subsys name 'net' [ 39.252672] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:46:42 Registers: info registers vcpu 0 RAX=1ffffffff0c0abcf RBX=ffffffff86055e78 RCX=ffffffff8661f0c7 RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86055e78 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86055e7c R13=ffffffff85d793d4 R14=ffffffff86055e74 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 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=00007f0be3e0a148 CR3=000000000dfd4000 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=d3033fd467f64a92a3439de3fdb50fa6 XMM02=ec2efd57dc4c00df000000000011d040 XMM03=26c253d611f3421f000000000011d110 XMM04=866b62b12d58a6b900000000000ae988 XMM05=d8b8f4f6bb6c13030000000000134448 XMM06=806171799158d9670000000000133178 XMM07=e042d86d42eb936e0000000000123cf0 XMM08=26c253d611f3421f000000000011d110 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=ffff8880159a3680 RSI=ffffffff814c83f1 RDI=ffff8880159a3a74 RBP=00007f7b9ab5de07 RSP=ffff88801c6af0e8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f7b9ab5de07 R13=0000000000000000 R14=ffff8880159a3680 R15=ffff88800fe1b130 RIP=ffffffff814c83f1 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 00007f7b99fcb900 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=00007f7b99faa020 CR3=0000000016138000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000