syzkaller login: [ 38.859681] BUG: Bad rss-counter state mm:00000000bd275d6a type:MM_FILEPAGES val:33 [ 38.860450] BUG: Bad rss-counter state mm:00000000bd275d6a type:MM_ANONPAGES val:22 [ 38.888392] ================================================================== [ 38.889022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.889684] Read of size 8 at addr ffff888019d765c8 by task sshd/219 [ 38.890178] [ 38.890317] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.890869] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.891504] Call Trace: [ 38.891714] [ 38.891894] dump_stack_lvl+0x91/0xf0 [ 38.892206] print_report+0xcc/0x620 [ 38.892519] ? __virt_addr_valid+0x102/0x340 [ 38.893155] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893574] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894001] kasan_report+0xbe/0xf0 [ 38.894307] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.894703] vma_interval_tree_remove+0xc75/0xec0 [ 38.895096] vma_prepare+0xc54/0x11a0 [ 38.895433] __split_vma+0x5af/0x950 [ 38.895742] ? __pfx___split_vma+0x10/0x10 [ 38.896089] ? find_held_lock+0x2c/0x110 [ 38.896412] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.896771] ? lock_is_held_type+0x9f/0x120 [ 38.897122] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.897546] ? mtree_range_walk+0x632/0x900 [ 38.897988] ? mas_walk+0x5c7/0x7c0 [ 38.898323] do_vmi_munmap+0x1f1/0x2b0 [ 38.898663] mmap_region+0x1f9/0x2660 [ 38.898997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.899354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.899835] ? __pfx_lock_acquire+0x10/0x10 [ 38.900166] ? __pfx_mmap_region+0x10/0x10 [ 38.900496] ? security_mmap_addr+0x7d/0xa0 [ 38.900826] ? get_unmapped_area+0x1f5/0x3f0 [ 38.901164] do_mmap+0x854/0xf00 [ 38.901442] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902016] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.902367] ksys_mmap_pgoff+0x3af/0x500 [ 38.902683] do_syscall_64+0x3f/0x90 [ 38.902989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903392] RIP: 0033:0x7f0154b2fd82 [ 38.903680] 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 [ 38.905353] RSP: 002b:00007ffef14d3b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0154b2fd82 [ 38.906681] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0153f69000 [ 38.907203] RBP: 00007f0153f69000 R08: 0000000000000009 R09: 0000000000001000 [ 38.907745] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbbfd57ec0 [ 38.908280] R13: 00007ffef14d3b90 R14: 00007ffef14d3bc0 R15: 00007ffef14d3f20 [ 38.908829] [ 38.909032] [ 38.909184] Allocated by task 212: [ 38.909490] kasan_save_stack+0x22/0x50 [ 38.909921] kasan_set_track+0x25/0x30 [ 38.910269] __kasan_slab_alloc+0x59/0x70 [ 38.910667] kmem_cache_alloc+0x16b/0x370 [ 38.910996] vm_area_dup+0x20/0x160 [ 38.911285] __split_vma+0x170/0x950 [ 38.911583] split_vma+0xc6/0x110 [ 38.911858] mprotect_fixup+0x8d2/0xb30 [ 38.912166] do_mprotect_pkey+0x87e/0xd40 [ 38.912489] __x64_sys_mprotect+0x78/0xc0 [ 38.912810] do_syscall_64+0x3f/0x90 [ 38.913163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913720] [ 38.913891] Freed by task 0: [ 38.914187] kasan_save_stack+0x22/0x50 [ 38.914576] kasan_set_track+0x25/0x30 [ 38.914962] kasan_save_free_info+0x2b/0x50 [ 38.915364] __kasan_slab_free+0x10a/0x190 [ 38.915700] kmem_cache_free+0x10d/0x4d0 [ 38.916013] rcu_core+0x8c8/0x2860 [ 38.916288] __do_softirq+0x1b7/0x7d4 [ 38.916596] [ 38.916728] Last potentially related work creation: [ 38.917092] kasan_save_stack+0x22/0x50 [ 38.917416] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917795] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918190] remove_vma+0x139/0x170 [ 38.918476] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.918875] do_vmi_munmap+0x1f1/0x2b0 [ 38.919213] __vm_munmap+0x138/0x3a0 [ 38.919545] __x64_sys_munmap+0x59/0x80 [ 38.919885] do_syscall_64+0x3f/0x90 [ 38.920223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920597] [ 38.920719] The buggy address belongs to the object at ffff888019d76570 [ 38.920719] which belongs to the cache vm_area_struct of size 168 [ 38.921675] The buggy address is located 88 bytes inside of [ 38.921675] freed 168-byte region [ffff888019d76570, ffff888019d76618) [ 38.922555] [ 38.922694] The buggy address belongs to the physical page: [ 38.923104] page:0000000077e13306 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d76 [ 38.923914] memcg:ffff88800cbf0701 [ 38.924260] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.924805] page_type: 0xffffffff() [ 38.925156] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.925913] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbf0701 [ 38.926510] page dumped because: kasan: bad access detected [ 38.926933] [ 38.927065] Memory state around the buggy address: [ 38.927428] ffff888019d76480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.927962] ffff888019d76500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.928499] >ffff888019d76580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.929022] ^ [ 38.929457] ffff888019d76600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.930087] ffff888019d76680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.930690] ================================================================== [ 38.931503] Disabling lock debugging due to kernel taint [ 40.404891] BUG: Bad rss-counter state mm:00000000b7e12d9c type:MM_FILEPAGES val:33 [ 40.405582] BUG: Bad rss-counter state mm:00000000b7e12d9c type:MM_ANONPAGES val:22 [ 40.773773] BUG: Bad rss-counter state mm:000000004bffa595 type:MM_FILEPAGES val:33 [ 40.774430] BUG: Bad rss-counter state mm:000000004bffa595 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9633' (ECDSA) to the list of known hosts. 2023/06/21 09:01:59 fuzzer started 2023/06/21 09:01:59 dialing manager at localhost:36067 2023/06/21 09:01:59 checking machine... 2023/06/21 09:01:59 checking revisions... [ 41.334737] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:01:59 testing simple program... [ 41.366115] cgroup: Unknown subsys name 'net' [ 41.410249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:01:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f6f2c32a270 CR3=000000000d9f0000 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=a5a0ddca9e56fc88224ad2e4818fded3 XMM02=2c67c8bc2e329bc3000000000011c0b0 XMM03=fb795ef6d657705600000000001222d8 XMM04=e682917185c29f4000000000000ae988 XMM05=dfcdbad4f1609c370000000000131e78 XMM06=fdc10b5d3eeeb42a0000000000131050 XMM07=e042d86d42eb936e00000000001225b0 XMM08=a6ebd3bf46c8397d000000000011c110 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800ed7b680 RSI=ffffffff844a8fee RDI=0000000000000005 RBP=ffff88801bce7400 RSP=ffff88801a16fb20 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=ffff88801a16fe88 R15=ffff88801a16fe70 RIP=ffffffff844a8fee 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 00007f3c9e8f8900 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=00007f3c9e8b8008 CR3=000000000ca6e000 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