syzkaller login: [ 36.666957] BUG: Bad rss-counter state mm:000000008d0fe82a type:MM_FILEPAGES val:33 [ 36.667980] BUG: Bad rss-counter state mm:000000008d0fe82a type:MM_ANONPAGES val:22 [ 36.706200] ================================================================== [ 36.707088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.708163] Read of size 8 at addr ffff88800e05ddf0 by task sshd/219 [ 36.708915] [ 36.709148] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.710050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.711018] Call Trace: [ 36.711330] [ 36.711608] dump_stack_lvl+0x91/0xf0 [ 36.712087] print_report+0xcc/0x620 [ 36.712551] ? __virt_addr_valid+0x102/0x340 [ 36.713086] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.713680] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.714291] kasan_report+0xbe/0xf0 [ 36.714756] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.715349] vma_interval_tree_remove+0xc75/0xec0 [ 36.715937] vma_prepare+0xc54/0x11a0 [ 36.716469] __split_vma+0x5af/0x950 [ 36.716959] ? __pfx___split_vma+0x10/0x10 [ 36.717539] ? find_held_lock+0x2c/0x110 [ 36.718091] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.718653] ? lock_is_held_type+0x9f/0x120 [ 36.719211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.719831] ? mtree_range_walk+0x632/0x900 [ 36.720450] ? mas_walk+0x5c7/0x7c0 [ 36.720934] do_vmi_munmap+0x1f1/0x2b0 [ 36.721476] mmap_region+0x1f9/0x2660 [ 36.721962] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.722469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.723175] ? __pfx_lock_acquire+0x10/0x10 [ 36.723717] ? __pfx_mmap_region+0x10/0x10 [ 36.724272] ? security_mmap_addr+0x7d/0xa0 [ 36.724809] ? get_unmapped_area+0x1f5/0x3f0 [ 36.725418] do_mmap+0x854/0xf00 [ 36.725872] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.726366] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.726934] ksys_mmap_pgoff+0x3af/0x500 [ 36.727440] do_syscall_64+0x3f/0x90 [ 36.727918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.728565] RIP: 0033:0x7f6c41d57d82 [ 36.729047] 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 [ 36.731078] RSP: 002b:00007fffa7f0a428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.731955] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c41d57d82 [ 36.732752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c41191000 [ 36.733553] RBP: 00007f6c41191000 R08: 0000000000000009 R09: 0000000000001000 [ 36.734370] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555dbae17980 [ 36.735164] R13: 00007fffa7f0a440 R14: 00007fffa7f0a470 R15: 00007fffa7f0a7d0 [ 36.735971] [ 36.736247] [ 36.736456] Allocated by task 212: [ 36.736862] kasan_save_stack+0x22/0x50 [ 36.737340] kasan_set_track+0x25/0x30 [ 36.737819] __kasan_slab_alloc+0x59/0x70 [ 36.738343] kmem_cache_alloc+0x16b/0x370 [ 36.738850] vm_area_dup+0x20/0x160 [ 36.739290] __split_vma+0x170/0x950 [ 36.739745] split_vma+0xc6/0x110 [ 36.740180] mprotect_fixup+0x8d2/0xb30 [ 36.740675] do_mprotect_pkey+0x87e/0xd40 [ 36.741182] __x64_sys_mprotect+0x78/0xc0 [ 36.741699] do_syscall_64+0x3f/0x90 [ 36.742171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.742803] [ 36.743016] Freed by task 212: [ 36.743400] kasan_save_stack+0x22/0x50 [ 36.743892] kasan_set_track+0x25/0x30 [ 36.744371] kasan_save_free_info+0x2b/0x50 [ 36.744910] __kasan_slab_free+0x10a/0x190 [ 36.745430] kmem_cache_free+0x10d/0x4d0 [ 36.745957] rcu_core+0x8c8/0x2860 [ 36.746399] __do_softirq+0x1b7/0x7d4 [ 36.746875] [ 36.747090] Last potentially related work creation: [ 36.747669] kasan_save_stack+0x22/0x50 [ 36.748166] __kasan_record_aux_stack+0x8e/0xa0 [ 36.748735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.749374] remove_vma+0x139/0x170 [ 36.749826] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.750384] do_vmi_munmap+0x1f1/0x2b0 [ 36.750872] __vm_munmap+0x138/0x3a0 [ 36.751330] __x64_sys_munmap+0x59/0x80 [ 36.751818] do_syscall_64+0x3f/0x90 [ 36.752287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.752917] [ 36.753125] The buggy address belongs to the object at ffff88800e05dd98 [ 36.753125] which belongs to the cache vm_area_struct of size 168 [ 36.754609] The buggy address is located 88 bytes inside of [ 36.754609] freed 168-byte region [ffff88800e05dd98, ffff88800e05de40) [ 36.755978] [ 36.756183] The buggy address belongs to the physical page: [ 36.756824] page:0000000009e4749b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe05d [ 36.757957] memcg:ffff888013e17501 [ 36.758377] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.759064] page_type: 0xffffffff() [ 36.759511] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b37c0 dead000000000003 [ 36.760425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e17501 [ 36.761326] page dumped because: kasan: bad access detected [ 36.761993] [ 36.762214] Memory state around the buggy address: [ 36.762794] ffff88800e05dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.763650] ffff88800e05dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.764512] >ffff88800e05dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.765357] ^ [ 36.766184] ffff88800e05de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.767033] ffff88800e05de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.767955] ================================================================== [ 36.768989] Disabling lock debugging due to kernel taint [ 38.968935] BUG: Bad rss-counter state mm:00000000ab87ad9a type:MM_FILEPAGES val:33 [ 38.970129] BUG: Bad rss-counter state mm:00000000ab87ad9a type:MM_ANONPAGES val:22 [ 39.385243] BUG: Bad rss-counter state mm:00000000559bd3f3 type:MM_FILEPAGES val:33 [ 39.386435] BUG: Bad rss-counter state mm:00000000559bd3f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54084' (ECDSA) to the list of known hosts. 2023/06/20 18:14:28 fuzzer started 2023/06/20 18:14:28 dialing manager at localhost:36067 2023/06/20 18:14:28 checking machine... 2023/06/20 18:14:28 checking revisions... [ 39.994640] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:14:28 testing simple program... [ 40.027215] cgroup: Unknown subsys name 'net' [ 40.063582] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:14:28 Registers: info registers vcpu 0 RAX=1ffff11001bf6c13 RBX=ffff88800dfb6068 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dfb6098 RBP=ffff8880160778f8 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888016077318 R14=ffffffff813782f8 R15=ffff88800e296900 RIP=ffffffff818464e2 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 00007f0e0ce6d900 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=00007f64d8277000 CR3=000000000e7aa000 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=ff0000000000ffff0000000000ff0000 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=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=00007ffea1f923c8 CR3=000000000c41c000 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=34313a3831203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732038323a3431 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000