syzkaller login: [ 23.745887] BUG: Bad rss-counter state mm:0000000025418b18 type:MM_FILEPAGES val:33 [ 23.747082] BUG: Bad rss-counter state mm:0000000025418b18 type:MM_ANONPAGES val:22 [ 23.899287] ================================================================== [ 23.900150] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.901034] Read of size 8 at addr ffff88800c5134e0 by task sshd/219 [ 23.901754] [ 23.901959] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.902907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.903839] Call Trace: [ 23.904141] [ 23.904415] dump_stack_lvl+0x91/0xf0 [ 23.904913] print_report+0xcc/0x620 [ 23.905377] ? __virt_addr_valid+0x102/0x340 [ 23.905894] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.906474] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.907052] kasan_report+0xbe/0xf0 [ 23.907510] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.908107] vma_interval_tree_remove+0xc75/0xec0 [ 23.908697] vma_prepare+0xc54/0x11a0 [ 23.909152] __split_vma+0x5af/0x950 [ 23.909603] ? __pfx___split_vma+0x10/0x10 [ 23.910103] ? find_held_lock+0x2c/0x110 [ 23.910597] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.911129] ? lock_is_held_type+0x9f/0x120 [ 23.911646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.912221] ? mtree_range_walk+0x632/0x900 [ 23.912738] ? mas_walk+0x5c7/0x7c0 [ 23.913190] do_vmi_munmap+0x1f1/0x2b0 [ 23.913654] mmap_region+0x1f9/0x2660 [ 23.914105] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.914585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.915268] ? __pfx_lock_acquire+0x10/0x10 [ 23.915792] ? __pfx_mmap_region+0x10/0x10 [ 23.916290] ? security_mmap_addr+0x7d/0xa0 [ 23.916790] ? get_unmapped_area+0x1f5/0x3f0 [ 23.917306] do_mmap+0x854/0xf00 [ 23.917730] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.918194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.918763] ksys_mmap_pgoff+0x3af/0x500 [ 23.919275] do_syscall_64+0x3f/0x90 [ 23.919760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.920400] RIP: 0033:0x7f6f2c3ebd82 [ 23.920850] 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 [ 23.922988] RSP: 002b:00007ffd3be83fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.923917] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f2c3ebd82 [ 23.924773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f2b825000 [ 23.925633] RBP: 00007f6f2b825000 R08: 0000000000000009 R09: 0000000000001000 [ 23.926491] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b892d14ec0 [ 23.927339] R13: 00007ffd3be83ff0 R14: 00007ffd3be84020 R15: 00007ffd3be84380 [ 23.928215] [ 23.928518] [ 23.928738] Allocated by task 212: [ 23.929173] kasan_save_stack+0x22/0x50 [ 23.929667] kasan_set_track+0x25/0x30 [ 23.930153] __kasan_slab_alloc+0x59/0x70 [ 23.930683] kmem_cache_alloc+0x16b/0x370 [ 23.931193] vm_area_dup+0x20/0x160 [ 23.931645] __split_vma+0x170/0x950 [ 23.932117] split_vma+0xc6/0x110 [ 23.932551] mprotect_fixup+0x8d2/0xb30 [ 23.933090] do_mprotect_pkey+0x87e/0xd40 [ 23.933693] __x64_sys_mprotect+0x78/0xc0 [ 23.934213] do_syscall_64+0x3f/0x90 [ 23.934687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.935339] [ 23.935565] Freed by task 212: [ 23.935966] kasan_save_stack+0x22/0x50 [ 23.936466] kasan_set_track+0x25/0x30 [ 23.936961] kasan_save_free_info+0x2b/0x50 [ 23.937491] __kasan_slab_free+0x10a/0x190 [ 23.938034] kmem_cache_free+0x10d/0x4d0 [ 23.938554] rcu_core+0x8c8/0x2860 [ 23.939004] __do_softirq+0x1b7/0x7d4 [ 23.939496] [ 23.939717] Last potentially related work creation: [ 23.940305] kasan_save_stack+0x22/0x50 [ 23.940813] __kasan_record_aux_stack+0x8e/0xa0 [ 23.941390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.942036] remove_vma+0x139/0x170 [ 23.942504] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.943064] do_vmi_munmap+0x1f1/0x2b0 [ 23.943554] __vm_munmap+0x138/0x3a0 [ 23.944031] __x64_sys_munmap+0x59/0x80 [ 23.944593] do_syscall_64+0x3f/0x90 [ 23.945078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.945717] [ 23.945933] The buggy address belongs to the object at ffff88800c513488 [ 23.945933] which belongs to the cache vm_area_struct of size 168 [ 23.947395] The buggy address is located 88 bytes inside of [ 23.947395] freed 168-byte region [ffff88800c513488, ffff88800c513530) [ 23.948818] [ 23.949037] The buggy address belongs to the physical page: [ 23.949688] page:0000000075e38d90 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc513 [ 23.950755] memcg:ffff88800c511101 [ 23.951178] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.951826] page_type: 0xffffffff() [ 23.952286] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d0080 000000000000000c [ 23.953198] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c511101 [ 23.954093] page dumped because: kasan: bad access detected [ 23.954760] [ 23.954974] Memory state around the buggy address: [ 23.955557] ffff88800c513380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.956412] ffff88800c513400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.957269] >ffff88800c513480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.958114] ^ [ 23.958862] ffff88800c513500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 23.959726] ffff88800c513580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.960574] ================================================================== [ 23.961493] Disabling lock debugging due to kernel taint [ 25.931740] BUG: Bad rss-counter state mm:0000000011c3917b type:MM_FILEPAGES val:33 [ 25.932650] BUG: Bad rss-counter state mm:0000000011c3917b type:MM_ANONPAGES val:22 [ 26.381046] BUG: Bad rss-counter state mm:0000000078230d3f type:MM_FILEPAGES val:33 [ 26.382169] BUG: Bad rss-counter state mm:0000000078230d3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54937' (ECDSA) to the list of known hosts. 2023/06/20 21:18:16 fuzzer started 2023/06/20 21:18:17 dialing manager at localhost:36067 2023/06/20 21:18:17 checking machine... 2023/06/20 21:18:17 checking revisions... [ 27.240569] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:18:17 testing simple program... [ 27.280091] cgroup: Unknown subsys name 'net' [ 27.319594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:18:16 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=00007ffc8682ca18 CR3=0000000005482000 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=00007f0ad30f6510000055a9b4257790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000001255 RCX=ffffffff8171b010 RDX=ffff88800f179b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801655fe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=1ffff1100fffb8bb R12=0000000000000000 R13=00007ffc53ebbbdc R14=0000000000000200 R15=0000000000000040 RIP=ffffffff814c0261 RFL=00000246 [---Z-P-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fea0efaa900 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=00007ffc53ebbbdc CR3=000000000f47a000 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=c4937bb7bf8bbb3e167b6aaf9a3e316e XMM04=337d7e8c3b7ff362f0598f06d0762ee1 XMM05=00000000000000000000000000000000 XMM06=337d7b8c3b7fbb3e16596a069a3e2e6e XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000