syzkaller login: [ 23.673113] BUG: Bad rss-counter state mm:000000005e34e4f5 type:MM_FILEPAGES val:33 [ 23.674297] BUG: Bad rss-counter state mm:000000005e34e4f5 type:MM_ANONPAGES val:22 [ 23.829935] ================================================================== [ 23.830914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.831828] Read of size 8 at addr ffff88800cd96140 by task sshd/220 [ 23.832671] [ 23.832888] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.833759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.834724] Call Trace: [ 23.835038] [ 23.835314] dump_stack_lvl+0x91/0xf0 [ 23.835798] print_report+0xcc/0x620 [ 23.836268] ? __virt_addr_valid+0x102/0x340 [ 23.836812] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.837418] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.838045] kasan_report+0xbe/0xf0 [ 23.838512] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.839122] vma_interval_tree_remove+0xc75/0xec0 [ 23.839722] vma_prepare+0xc54/0x11a0 [ 23.840196] __split_vma+0x5af/0x950 [ 23.840660] ? __pfx___split_vma+0x10/0x10 [ 23.841186] ? find_held_lock+0x2c/0x110 [ 23.841708] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.842269] ? lock_is_held_type+0x9f/0x120 [ 23.842805] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.843402] ? mtree_range_walk+0x632/0x900 [ 23.843946] ? mas_walk+0x5c7/0x7c0 [ 23.844417] do_vmi_munmap+0x1f1/0x2b0 [ 23.844902] mmap_region+0x1f9/0x2660 [ 23.845382] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.845905] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.846612] ? __pfx_lock_acquire+0x10/0x10 [ 23.847138] ? __pfx_mmap_region+0x10/0x10 [ 23.847662] ? security_mmap_addr+0x7d/0xa0 [ 23.848187] ? get_unmapped_area+0x1f5/0x3f0 [ 23.848731] do_mmap+0x854/0xf00 [ 23.849172] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.849678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.850233] ksys_mmap_pgoff+0x3af/0x500 [ 23.850737] do_syscall_64+0x3f/0x90 [ 23.851213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.851853] RIP: 0033:0x7fd47ec0dd82 [ 23.852304] 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 [ 23.854392] RSP: 002b:00007ffc50a48888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.855280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd47ec0dd82 [ 23.856107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd47e047000 [ 23.856938] RBP: 00007fd47e047000 R08: 0000000000000009 R09: 0000000000001000 [ 23.857776] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b35cb3eec0 [ 23.858608] R13: 00007ffc50a488a0 R14: 00007ffc50a488d0 R15: 00007ffc50a48c30 [ 23.859458] [ 23.859750] [ 23.859967] Allocated by task 213: [ 23.860391] kasan_save_stack+0x22/0x50 [ 23.860889] kasan_set_track+0x25/0x30 [ 23.861378] __kasan_slab_alloc+0x59/0x70 [ 23.861911] kmem_cache_alloc+0x16b/0x370 [ 23.862424] vm_area_dup+0x20/0x160 [ 23.862870] __split_vma+0x170/0x950 [ 23.863327] split_vma+0xc6/0x110 [ 23.863766] mprotect_fixup+0x8d2/0xb30 [ 23.864266] do_mprotect_pkey+0x87e/0xd40 [ 23.864780] __x64_sys_mprotect+0x78/0xc0 [ 23.865290] do_syscall_64+0x3f/0x90 [ 23.865767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.866399] [ 23.866613] Freed by task 213: [ 23.867002] kasan_save_stack+0x22/0x50 [ 23.867499] kasan_set_track+0x25/0x30 [ 23.867984] kasan_save_free_info+0x2b/0x50 [ 23.868507] __kasan_slab_free+0x10a/0x190 [ 23.869029] kmem_cache_free+0x10d/0x4d0 [ 23.869542] rcu_core+0x8c8/0x2860 [ 23.869978] __do_softirq+0x1b7/0x7d4 [ 23.870449] [ 23.870663] Last potentially related work creation: [ 23.871238] kasan_save_stack+0x22/0x50 [ 23.871757] __kasan_record_aux_stack+0x8e/0xa0 [ 23.872312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.872935] remove_vma+0x139/0x170 [ 23.873372] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.873919] do_vmi_munmap+0x1f1/0x2b0 [ 23.874387] __vm_munmap+0x138/0x3a0 [ 23.874852] __x64_sys_munmap+0x59/0x80 [ 23.875340] do_syscall_64+0x3f/0x90 [ 23.875800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.876427] [ 23.876644] The buggy address belongs to the object at ffff88800cd960e8 [ 23.876644] which belongs to the cache vm_area_struct of size 168 [ 23.878076] The buggy address is located 88 bytes inside of [ 23.878076] freed 168-byte region [ffff88800cd960e8, ffff88800cd96190) [ 23.879453] [ 23.879664] The buggy address belongs to the physical page: [ 23.880310] page:00000000e88c3379 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd96 [ 23.881375] memcg:ffff88800d92c301 [ 23.881806] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.882441] page_type: 0xffffffff() [ 23.882892] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.883796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d92c301 [ 23.884686] page dumped because: kasan: bad access detected [ 23.885335] [ 23.885556] Memory state around the buggy address: [ 23.886129] ffff88800cd96000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.886974] ffff88800cd96080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 23.887808] >ffff88800cd96100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.888641] ^ [ 23.889271] ffff88800cd96180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.890119] ffff88800cd96200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.890960] ================================================================== [ 23.892026] Disabling lock debugging due to kernel taint [ 25.836091] BUG: Bad rss-counter state mm:0000000020d32d95 type:MM_FILEPAGES val:33 [ 25.837082] BUG: Bad rss-counter state mm:0000000020d32d95 type:MM_ANONPAGES val:22 [ 26.386623] BUG: Bad rss-counter state mm:00000000a08bf405 type:MM_FILEPAGES val:33 [ 26.387815] BUG: Bad rss-counter state mm:00000000a08bf405 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28565' (ECDSA) to the list of known hosts. 2023/06/20 23:04:21 fuzzer started 2023/06/20 23:04:21 dialing manager at localhost:36067 2023/06/20 23:04:21 checking machine... 2023/06/20 23:04:21 checking revisions... [ 27.045907] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:04:21 testing simple program... [ 27.103870] cgroup: Unknown subsys name 'net' [ 27.140892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:04:21 Registers: info registers vcpu 0 RAX=1ffff11001cb24ab RBX=ffff88800e592528 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e592558 RBP=ffff888018536758 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880185325e0 R14=ffffffff813782f8 R15=ffff88800e0a4600 RIP=ffffffff818464ec RFL=00000046 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc2b4e67900 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=00007fc2b541c650 CR3=00000000096e6000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=0000000000000001 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=00007ffcd6b715b8 CR3=0000000005482000 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=00007f5ff0f5d51000005603c6ea9790 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