syzkaller login: [ 30.694167] BUG: Bad rss-counter state mm:00000000550c13b3 type:MM_FILEPAGES val:33 [ 30.695191] BUG: Bad rss-counter state mm:00000000550c13b3 type:MM_ANONPAGES val:22 [ 30.855066] ================================================================== [ 30.855990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856930] Read of size 8 at addr ffff88800c6a86b0 by task sshd/219 [ 30.857689] [ 30.858042] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859927] Call Trace: [ 30.860268] [ 30.860551] dump_stack_lvl+0x91/0xf0 [ 30.861040] print_report+0xcc/0x620 [ 30.861521] ? __virt_addr_valid+0x102/0x340 [ 30.862084] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863333] kasan_report+0xbe/0xf0 [ 30.863819] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864440] vma_interval_tree_remove+0xc75/0xec0 [ 30.865045] vma_prepare+0xc54/0x11a0 [ 30.865534] __split_vma+0x5af/0x950 [ 30.866010] ? __pfx___split_vma+0x10/0x10 [ 30.866537] ? find_held_lock+0x2c/0x110 [ 30.867085] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867677] ? lock_is_held_type+0x9f/0x120 [ 30.868248] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868866] ? mtree_range_walk+0x632/0x900 [ 30.869427] ? mas_walk+0x5c7/0x7c0 [ 30.869902] do_vmi_munmap+0x1f1/0x2b0 [ 30.870417] mmap_region+0x1f9/0x2660 [ 30.870948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871481] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.872238] ? __pfx_lock_acquire+0x10/0x10 [ 30.872806] ? __pfx_mmap_region+0x10/0x10 [ 30.873365] ? security_mmap_addr+0x7d/0xa0 [ 30.873925] ? get_unmapped_area+0x1f5/0x3f0 [ 30.874498] do_mmap+0x854/0xf00 [ 30.874956] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.875453] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.876028] ksys_mmap_pgoff+0x3af/0x500 [ 30.876529] do_syscall_64+0x3f/0x90 [ 30.877033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877684] RIP: 0033:0x7faadc6bcd82 [ 30.878150] 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 [ 30.880347] RSP: 002b:00007ffcafb3a1f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.881258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faadc6bcd82 [ 30.882116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faadbaf6000 [ 30.883008] RBP: 00007faadbaf6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.883897] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565237d90ec0 [ 30.884790] R13: 00007ffcafb3a210 R14: 00007ffcafb3a240 R15: 00007ffcafb3a5a0 [ 30.885690] [ 30.885993] [ 30.886206] Allocated by task 212: [ 30.886634] kasan_save_stack+0x22/0x50 [ 30.887162] kasan_set_track+0x25/0x30 [ 30.887671] __kasan_slab_alloc+0x59/0x70 [ 30.888201] kmem_cache_alloc+0x16b/0x370 [ 30.888727] vm_area_dup+0x20/0x160 [ 30.889181] __split_vma+0x170/0x950 [ 30.889655] split_vma+0xc6/0x110 [ 30.890097] mprotect_fixup+0x8d2/0xb30 [ 30.890615] do_mprotect_pkey+0x87e/0xd40 [ 30.891144] __x64_sys_mprotect+0x78/0xc0 [ 30.891666] do_syscall_64+0x3f/0x90 [ 30.892147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.892801] [ 30.893014] Freed by task 212: [ 30.893416] kasan_save_stack+0x22/0x50 [ 30.893916] kasan_set_track+0x25/0x30 [ 30.894424] kasan_save_free_info+0x2b/0x50 [ 30.894967] __kasan_slab_free+0x10a/0x190 [ 30.895499] kmem_cache_free+0x10d/0x4d0 [ 30.896005] rcu_core+0x8c8/0x2860 [ 30.896446] __do_softirq+0x1b7/0x7d4 [ 30.896925] [ 30.897139] Last potentially related work creation: [ 30.897744] kasan_save_stack+0x22/0x50 [ 30.898270] __kasan_record_aux_stack+0x8e/0xa0 [ 30.898975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.899647] remove_vma+0x139/0x170 [ 30.900119] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.900686] do_vmi_munmap+0x1f1/0x2b0 [ 30.901202] __vm_munmap+0x138/0x3a0 [ 30.901691] __x64_sys_munmap+0x59/0x80 [ 30.902198] do_syscall_64+0x3f/0x90 [ 30.902673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903327] [ 30.903545] The buggy address belongs to the object at ffff88800c6a8658 [ 30.903545] which belongs to the cache vm_area_struct of size 168 [ 30.905028] The buggy address is located 88 bytes inside of [ 30.905028] freed 168-byte region [ffff88800c6a8658, ffff88800c6a8700) [ 30.906438] [ 30.906664] The buggy address belongs to the physical page: [ 30.907381] page:00000000b72b5c5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6a8 [ 30.908484] memcg:ffff88800eb3b101 [ 30.908914] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.909564] page_type: 0xffffffff() [ 30.910033] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.910974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb3b101 [ 30.911953] page dumped because: kasan: bad access detected [ 30.912647] [ 30.912867] Memory state around the buggy address: [ 30.913470] ffff88800c6a8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.914364] ffff88800c6a8600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.915275] >ffff88800c6a8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.916158] ^ [ 30.916769] ffff88800c6a8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.917655] ffff88800c6a8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.918545] ================================================================== [ 30.919604] Disabling lock debugging due to kernel taint [ 32.765175] BUG: Bad rss-counter state mm:0000000065bab3a9 type:MM_FILEPAGES val:33 [ 32.766294] BUG: Bad rss-counter state mm:0000000065bab3a9 type:MM_ANONPAGES val:22 [ 33.200430] BUG: Bad rss-counter state mm:00000000cad8e79b type:MM_FILEPAGES val:33 [ 33.201435] BUG: Bad rss-counter state mm:00000000cad8e79b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33848' (ECDSA) to the list of known hosts. 2023/06/20 16:15:49 fuzzer started 2023/06/20 16:15:49 dialing manager at localhost:36067 2023/06/20 16:15:49 checking machine... 2023/06/20 16:15:49 checking revisions... [ 33.915702] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:15:49 testing simple program... [ 33.963920] cgroup: Unknown subsys name 'net' [ 34.004729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:15:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff888016c1b680 RSI=ffffffff8171b000 RDI=ffffffff8171b3d3 RBP=ffff88800f69a000 RSP=ffff888019947e78 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000556b36c35804 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff8171b005 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 00007f57497cf900 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=0000556b36c35804 CR3=000000000ea4c000 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=00000000000000000000556b3635e060 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=00007efc6a4689e0 CR3=000000000c518000 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=95bde3415177f8a4784b1e48113c66af XMM02=000000000011da98eff9b2d0a8fce9cb XMM03=000000000011db682c67c8bc2e329bc3 XMM04=2eb7b79c8952941500000000000ae988 XMM05=000a0ef3581384fd0000000000133100 XMM06=806171799158d9670000000000131ef0 XMM07=fb795ef6d65770560000000000122198 XMM08=2c67c8bc2e329bc3000000000011db08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000