syzkaller login: [ 69.339724] BUG: Bad rss-counter state mm:0000000079941574 type:MM_FILEPAGES val:33 [ 69.341247] BUG: Bad rss-counter state mm:0000000079941574 type:MM_ANONPAGES val:22 [ 69.496520] ================================================================== [ 69.497587] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.498784] Read of size 8 at addr ffff88801664ac20 by task sshd/219 [ 69.499675] [ 69.499891] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.500928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.501909] Call Trace: [ 69.502227] [ 69.502520] dump_stack_lvl+0x91/0xf0 [ 69.503014] print_report+0xcc/0x620 [ 69.503500] ? __virt_addr_valid+0x102/0x340 [ 69.504054] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.504673] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.505296] kasan_report+0xbe/0xf0 [ 69.505768] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.506386] vma_interval_tree_remove+0xc75/0xec0 [ 69.506979] vma_prepare+0xc54/0x11a0 [ 69.507470] __split_vma+0x5af/0x950 [ 69.507939] ? __pfx___split_vma+0x10/0x10 [ 69.508462] ? find_held_lock+0x2c/0x110 [ 69.508979] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.509534] ? lock_is_held_type+0x9f/0x120 [ 69.510073] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.510673] ? mtree_range_walk+0x632/0x900 [ 69.511232] ? mas_walk+0x5c7/0x7c0 [ 69.511711] do_vmi_munmap+0x1f1/0x2b0 [ 69.512207] mmap_region+0x1f9/0x2660 [ 69.512683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.513190] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.513908] ? __pfx_lock_acquire+0x10/0x10 [ 69.514439] ? __pfx_mmap_region+0x10/0x10 [ 69.514969] ? security_mmap_addr+0x7d/0xa0 [ 69.515518] ? get_unmapped_area+0x1f5/0x3f0 [ 69.516072] do_mmap+0x854/0xf00 [ 69.516520] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.517011] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.517573] ksys_mmap_pgoff+0x3af/0x500 [ 69.518084] do_syscall_64+0x3f/0x90 [ 69.518561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.519216] RIP: 0033:0x7f046b90bd82 [ 69.519688] 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 [ 69.521819] RSP: 002b:00007ffdca76ef08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.522716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f046b90bd82 [ 69.523589] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f046ad45000 [ 69.524426] RBP: 00007f046ad45000 R08: 0000000000000009 R09: 0000000000001000 [ 69.525263] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559daa5f6f60 [ 69.526092] R13: 00007ffdca76ef20 R14: 00007ffdca76ef50 R15: 00007ffdca76f2b0 [ 69.526947] [ 69.527240] [ 69.527472] Allocated by task 212: [ 69.527897] kasan_save_stack+0x22/0x50 [ 69.528397] kasan_set_track+0x25/0x30 [ 69.528881] __kasan_slab_alloc+0x59/0x70 [ 69.529403] kmem_cache_alloc+0x16b/0x370 [ 69.529917] vm_area_dup+0x20/0x160 [ 69.530366] __split_vma+0x170/0x950 [ 69.530824] split_vma+0xc6/0x110 [ 69.531269] mprotect_fixup+0x8d2/0xb30 [ 69.531771] do_mprotect_pkey+0x87e/0xd40 [ 69.532294] __x64_sys_mprotect+0x78/0xc0 [ 69.532804] do_syscall_64+0x3f/0x90 [ 69.533277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.533908] [ 69.534124] Freed by task 212: [ 69.534512] kasan_save_stack+0x22/0x50 [ 69.535016] kasan_set_track+0x25/0x30 [ 69.535526] kasan_save_free_info+0x2b/0x50 [ 69.536057] __kasan_slab_free+0x10a/0x190 [ 69.536583] kmem_cache_free+0x10d/0x4d0 [ 69.537083] rcu_core+0x8c8/0x2860 [ 69.537521] __do_softirq+0x1b7/0x7d4 [ 69.537992] [ 69.538214] Last potentially related work creation: [ 69.538793] kasan_save_stack+0x22/0x50 [ 69.539290] __kasan_record_aux_stack+0x8e/0xa0 [ 69.539866] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.540500] remove_vma+0x139/0x170 [ 69.540946] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.541500] do_vmi_munmap+0x1f1/0x2b0 [ 69.541987] __vm_munmap+0x138/0x3a0 [ 69.542444] __x64_sys_munmap+0x59/0x80 [ 69.542931] do_syscall_64+0x3f/0x90 [ 69.543413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.544049] [ 69.544261] The buggy address belongs to the object at ffff88801664abc8 [ 69.544261] which belongs to the cache vm_area_struct of size 168 [ 69.545699] The buggy address is located 88 bytes inside of [ 69.545699] freed 168-byte region [ffff88801664abc8, ffff88801664ac70) [ 69.547090] [ 69.547301] The buggy address belongs to the physical page: [ 69.547981] page:000000007cae6bb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1664a [ 69.549064] memcg:ffff888008ff7401 [ 69.549481] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.550114] page_type: 0xffffffff() [ 69.550556] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.551471] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008ff7401 [ 69.552359] page dumped because: kasan: bad access detected [ 69.553010] [ 69.553222] Memory state around the buggy address: [ 69.553798] ffff88801664ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.554641] ffff88801664ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 69.555492] >ffff88801664ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 69.556338] ^ [ 69.556856] ffff88801664ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.557690] ffff88801664ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.558547] ================================================================== [ 69.559539] Disabling lock debugging due to kernel taint [ 71.540562] BUG: Bad rss-counter state mm:00000000d30555cc type:MM_FILEPAGES val:33 [ 71.541342] BUG: Bad rss-counter state mm:00000000d30555cc type:MM_ANONPAGES val:22 [ 72.086646] BUG: Bad rss-counter state mm:0000000048db0972 type:MM_FILEPAGES val:33 [ 72.087864] BUG: Bad rss-counter state mm:0000000048db0972 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51408' (ECDSA) to the list of known hosts. 2023/06/20 03:42:27 fuzzer started 2023/06/20 03:42:27 dialing manager at localhost:44161 2023/06/20 03:42:27 checking machine... 2023/06/20 03:42:27 checking revisions... [ 72.727847] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:42:27 testing simple program... [ 72.777601] cgroup: Unknown subsys name 'net' [ 72.820251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:41:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800d6d48d0 RCX=0000000000000000 RDX=ffff8880158f8000 RSI=ffffffff811431c2 RDI=0000000000000007 RBP=000000000d6d48d0 RSP=ffff8880158efcd8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=ffff88800e2cd300 RIP=ffffffff811431c6 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 00007f0800ae4900 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=00007f919a72d650 CR3=000000000d8c4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d0f6f45b2897ee4d00000000000ae988 XMM05=0078d06be04bba100000000000139158 XMM06=806171799158d9670000000000137f48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fff6f347b78 CR3=000000000f698000 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=2036323a32343a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32343a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000