syzkaller login: [ 29.036067] BUG: Bad rss-counter state mm:000000007da98b6b type:MM_FILEPAGES val:33 [ 29.037068] BUG: Bad rss-counter state mm:000000007da98b6b type:MM_ANONPAGES val:22 [ 29.201384] ================================================================== [ 29.202298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.203243] Read of size 8 at addr ffff888017fe54e0 by task sshd/219 [ 29.204026] [ 29.204245] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.205262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.206265] Call Trace: [ 29.206585] [ 29.206872] dump_stack_lvl+0x91/0xf0 [ 29.207390] print_report+0xcc/0x620 [ 29.207894] ? __virt_addr_valid+0x102/0x340 [ 29.208468] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.209111] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.209745] kasan_report+0xbe/0xf0 [ 29.210241] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.210861] vma_interval_tree_remove+0xc75/0xec0 [ 29.211465] vma_prepare+0xc54/0x11a0 [ 29.211943] __split_vma+0x5af/0x950 [ 29.212413] ? __pfx___split_vma+0x10/0x10 [ 29.212939] ? find_held_lock+0x2c/0x110 [ 29.213464] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.214035] ? lock_is_held_type+0x9f/0x120 [ 29.214573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.215177] ? mtree_range_walk+0x632/0x900 [ 29.215737] ? mas_walk+0x5c7/0x7c0 [ 29.216219] do_vmi_munmap+0x1f1/0x2b0 [ 29.216714] mmap_region+0x1f9/0x2660 [ 29.217194] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.217713] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.218462] ? __pfx_lock_acquire+0x10/0x10 [ 29.218990] ? __pfx_mmap_region+0x10/0x10 [ 29.219519] ? security_mmap_addr+0x7d/0xa0 [ 29.220050] ? get_unmapped_area+0x1f5/0x3f0 [ 29.220623] do_mmap+0x854/0xf00 [ 29.221066] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.221557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.222132] ksys_mmap_pgoff+0x3af/0x500 [ 29.222647] do_syscall_64+0x3f/0x90 [ 29.223121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.223776] RIP: 0033:0x7fd779bcdd82 [ 29.224237] 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 [ 29.226382] RSP: 002b:00007ffd8c636bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.227293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd779bcdd82 [ 29.228149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd779007000 [ 29.229007] RBP: 00007fd779007000 R08: 0000000000000009 R09: 0000000000001000 [ 29.229862] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e2885fec0 [ 29.230725] R13: 00007ffd8c636bd0 R14: 00007ffd8c636c00 R15: 00007ffd8c636f60 [ 29.231585] [ 29.231877] [ 29.232091] Allocated by task 211: [ 29.232516] kasan_save_stack+0x22/0x50 [ 29.233023] kasan_set_track+0x25/0x30 [ 29.233516] __kasan_slab_alloc+0x59/0x70 [ 29.234045] kmem_cache_alloc+0x16b/0x370 [ 29.234567] vm_area_dup+0x20/0x160 [ 29.235020] __split_vma+0x170/0x950 [ 29.235494] split_vma+0xc6/0x110 [ 29.235936] mprotect_fixup+0x8d2/0xb30 [ 29.236447] do_mprotect_pkey+0x87e/0xd40 [ 29.236967] __x64_sys_mprotect+0x78/0xc0 [ 29.237486] do_syscall_64+0x3f/0x90 [ 29.237959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.238623] [ 29.238845] Freed by task 19: [ 29.239234] kasan_save_stack+0x22/0x50 [ 29.239740] kasan_set_track+0x25/0x30 [ 29.240235] kasan_save_free_info+0x2b/0x50 [ 29.240764] __kasan_slab_free+0x10a/0x190 [ 29.241291] kmem_cache_free+0x10d/0x4d0 [ 29.241811] rcu_core+0x8c8/0x2860 [ 29.242272] __do_softirq+0x1b7/0x7d4 [ 29.242753] [ 29.242971] Last potentially related work creation: [ 29.243557] kasan_save_stack+0x22/0x50 [ 29.244060] __kasan_record_aux_stack+0x8e/0xa0 [ 29.244637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.245276] remove_vma+0x139/0x170 [ 29.245728] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.246404] do_vmi_munmap+0x1f1/0x2b0 [ 29.246900] __vm_munmap+0x138/0x3a0 [ 29.247375] __x64_sys_munmap+0x59/0x80 [ 29.247879] do_syscall_64+0x3f/0x90 [ 29.248357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.248996] [ 29.249210] Second to last potentially related work creation: [ 29.249899] kasan_save_stack+0x22/0x50 [ 29.250413] __kasan_record_aux_stack+0x8e/0xa0 [ 29.250985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.251631] remove_vma+0x139/0x170 [ 29.252087] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.252649] do_vmi_munmap+0x1f1/0x2b0 [ 29.253140] mmap_region+0x1f9/0x2660 [ 29.253621] do_mmap+0x854/0xf00 [ 29.254060] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.254545] ksys_mmap_pgoff+0x3af/0x500 [ 29.255046] do_syscall_64+0x3f/0x90 [ 29.255520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.256162] [ 29.256376] The buggy address belongs to the object at ffff888017fe5488 [ 29.256376] which belongs to the cache vm_area_struct of size 168 [ 29.257845] The buggy address is located 88 bytes inside of [ 29.257845] freed 168-byte region [ffff888017fe5488, ffff888017fe5530) [ 29.259258] [ 29.259474] The buggy address belongs to the physical page: [ 29.260127] page:0000000089d7c372 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17fe5 [ 29.261219] memcg:ffff888016358801 [ 29.261645] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.262363] page_type: 0xffffffff() [ 29.262824] raw: 0100000000000200 ffff88800879fc80 ffffea00003a0b00 000000000000000b [ 29.263748] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016358801 [ 29.264655] page dumped because: kasan: bad access detected [ 29.265312] [ 29.265528] Memory state around the buggy address: [ 29.266123] ffff888017fe5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.266975] ffff888017fe5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.267845] >ffff888017fe5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.268703] ^ [ 29.269451] ffff888017fe5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.270315] ffff888017fe5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.271167] ================================================================== [ 29.272086] Disabling lock debugging due to kernel taint [ 31.655488] BUG: Bad rss-counter state mm:00000000d65a2532 type:MM_FILEPAGES val:33 [ 31.657132] BUG: Bad rss-counter state mm:00000000d65a2532 type:MM_ANONPAGES val:22 [ 32.132641] BUG: Bad rss-counter state mm:000000005f3fbfe3 type:MM_FILEPAGES val:33 [ 32.133714] BUG: Bad rss-counter state mm:000000005f3fbfe3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61523' (ECDSA) to the list of known hosts. 2023/06/20 07:03:11 fuzzer started 2023/06/20 07:03:12 dialing manager at localhost:44161 2023/06/20 07:03:12 checking machine... 2023/06/20 07:03:12 checking revisions... [ 32.838380] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:03:12 testing simple program... [ 32.869554] cgroup: Unknown subsys name 'net' [ 32.908453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:03:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000c RCX=0000000000000000 RDX=ffff888018961b40 RSI=000000000000000e RDI=ffffffff849f03c0 RBP=ffff88800f23fe30 RSP=ffff88800f23fd80 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000000 R12=00007ffde3d514f8 R13=ffff88800f23fe30 R14=000000000000000c R15=0000000000000000 RIP=ffffffff81704ae6 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 00007f966ca81900 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=00007f966d038618 CR3=000000001690c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007fb3d1bc6fe0 CR3=00000000096c4000 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=07269f613482378c134c20d60e72f087 XMM02=ec2efd57dc4c00df000000000011c510 XMM03=08a62bcae7a3013f000000000011c5e0 XMM04=9e8ce8bfc582209c00000000000ae988 XMM05=dfcdbad4f1609c370000000000134998 XMM06=92c880f34f567eb30000000000133800 XMM07=e042d86d42eb936e0000000000123d10 XMM08=08a62bcae7a3013f000000000011c5e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000