syzkaller login: [ 38.555729] BUG: Bad rss-counter state mm:0000000031a2f8f5 type:MM_FILEPAGES val:33 [ 38.556477] BUG: Bad rss-counter state mm:0000000031a2f8f5 type:MM_ANONPAGES val:22 [ 38.722791] ================================================================== [ 38.723536] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.724132] Read of size 8 at addr ffff88800d8d8a50 by task sshd/219 [ 38.724605] [ 38.724741] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.725276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.725912] Call Trace: [ 38.726130] [ 38.726315] dump_stack_lvl+0x91/0xf0 [ 38.726648] print_report+0xcc/0x620 [ 38.726988] ? __virt_addr_valid+0x102/0x340 [ 38.727384] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.727804] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.728227] kasan_report+0xbe/0xf0 [ 38.728556] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.728989] vma_interval_tree_remove+0xc75/0xec0 [ 38.729404] vma_prepare+0xc54/0x11a0 [ 38.734242] __split_vma+0x5af/0x950 [ 38.734588] ? __pfx___split_vma+0x10/0x10 [ 38.735016] ? find_held_lock+0x2c/0x110 [ 38.735358] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.735733] ? lock_is_held_type+0x9f/0x120 [ 38.736159] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.736580] ? mtree_range_walk+0x632/0x900 [ 38.737219] ? mas_walk+0x5c7/0x7c0 [ 38.737550] do_vmi_munmap+0x1f1/0x2b0 [ 38.737883] mmap_region+0x1f9/0x2660 [ 38.738299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.738617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.739104] ? __pfx_lock_acquire+0x10/0x10 [ 38.739447] ? __pfx_mmap_region+0x10/0x10 [ 38.739779] ? security_mmap_addr+0x7d/0xa0 [ 38.740169] ? get_unmapped_area+0x1f5/0x3f0 [ 38.740517] do_mmap+0x854/0xf00 [ 38.740798] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.741166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.741515] ksys_mmap_pgoff+0x3af/0x500 [ 38.741861] do_syscall_64+0x3f/0x90 [ 38.742269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.742714] RIP: 0033:0x7fee9b6c8d82 [ 38.743074] 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 [ 38.744571] RSP: 002b:00007ffd796ec6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.745251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee9b6c8d82 [ 38.745838] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee9ab02000 [ 38.747213] RBP: 00007fee9ab02000 R08: 0000000000000009 R09: 0000000000001000 [ 38.747778] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd58c36ec0 [ 38.748413] R13: 00007ffd796ec710 R14: 00007ffd796ec740 R15: 00007ffd796ecaa0 [ 38.749056] [ 38.749267] [ 38.749411] Allocated by task 212: [ 38.749711] kasan_save_stack+0x22/0x50 [ 38.750125] kasan_set_track+0x25/0x30 [ 38.750468] __kasan_slab_alloc+0x59/0x70 [ 38.750793] kmem_cache_alloc+0x16b/0x370 [ 38.751169] vm_area_dup+0x20/0x160 [ 38.751455] __split_vma+0x170/0x950 [ 38.751744] split_vma+0xc6/0x110 [ 38.752065] mprotect_fixup+0x8d2/0xb30 [ 38.752389] do_mprotect_pkey+0x87e/0xd40 [ 38.752714] __x64_sys_mprotect+0x78/0xc0 [ 38.753089] do_syscall_64+0x3f/0x90 [ 38.753388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.753809] [ 38.754022] Freed by task 0: [ 38.754287] kasan_save_stack+0x22/0x50 [ 38.754620] kasan_set_track+0x25/0x30 [ 38.755006] kasan_save_free_info+0x2b/0x50 [ 38.755380] __kasan_slab_free+0x10a/0x190 [ 38.755747] kmem_cache_free+0x10d/0x4d0 [ 38.756150] rcu_core+0x8c8/0x2860 [ 38.756470] __do_softirq+0x1b7/0x7d4 [ 38.756806] [ 38.757012] Last potentially related work creation: [ 38.757409] kasan_save_stack+0x22/0x50 [ 38.757765] __kasan_record_aux_stack+0x8e/0xa0 [ 38.758242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.758684] remove_vma+0x139/0x170 [ 38.759034] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.759420] do_vmi_munmap+0x1f1/0x2b0 [ 38.759750] __vm_munmap+0x138/0x3a0 [ 38.760125] __x64_sys_munmap+0x59/0x80 [ 38.760463] do_syscall_64+0x3f/0x90 [ 38.760784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.761276] [ 38.761419] The buggy address belongs to the object at ffff88800d8d89f8 [ 38.761419] which belongs to the cache vm_area_struct of size 168 [ 38.762472] The buggy address is located 88 bytes inside of [ 38.762472] freed 168-byte region [ffff88800d8d89f8, ffff88800d8d8aa0) [ 38.763468] [ 38.763621] The buggy address belongs to the physical page: [ 38.764124] page:00000000e604f440 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8d8 [ 38.764877] memcg:ffff88800eaa5d01 [ 38.765242] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.765702] page_type: 0xffffffff() [ 38.766097] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383000 dead000000000004 [ 38.766738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaa5d01 [ 38.767365] page dumped because: kasan: bad access detected [ 38.767785] [ 38.767978] Memory state around the buggy address: [ 38.768360] ffff88800d8d8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.768964] ffff88800d8d8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.769514] >ffff88800d8d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.770156] ^ [ 38.770632] ffff88800d8d8a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 38.771278] ffff88800d8d8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.771842] ================================================================== [ 38.781940] Disabling lock debugging due to kernel taint [ 41.778558] BUG: Bad rss-counter state mm:00000000697de65a type:MM_FILEPAGES val:33 [ 41.780550] BUG: Bad rss-counter state mm:00000000697de65a type:MM_ANONPAGES val:22 [ 42.771250] BUG: Bad rss-counter state mm:000000000b929c2d type:MM_FILEPAGES val:33 [ 42.781800] BUG: Bad rss-counter state mm:000000000b929c2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45171' (ECDSA) to the list of known hosts. 2023/06/21 10:18:20 fuzzer started 2023/06/21 10:18:21 dialing manager at localhost:36067 2023/06/21 10:18:21 checking machine... 2023/06/21 10:18:21 checking revisions... [ 43.785729] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:18:21 testing simple program... [ 43.842975] cgroup: Unknown subsys name 'net' [ 43.930551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:18:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=ffff888016829b40 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018f6f528 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f0d361a64bb R13=0000000000000000 R14=ffff888016829b40 R15=0000000000000cc0 RIP=ffffffff814c84af 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 00007f0d35ce7900 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=00007f77ee6b2328 CR3=000000000fcd0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 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=ffff888008c04400 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=00007f7c9e4c9580 CR3=0000000009c12000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=d17bfa1df371944d0000000000133768 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=79ebeebeb35efe5600000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000