syzkaller login: [ 30.633998] BUG: Bad rss-counter state mm:000000002a59ff02 type:MM_FILEPAGES val:33 [ 30.635894] BUG: Bad rss-counter state mm:000000002a59ff02 type:MM_ANONPAGES val:22 [ 30.747245] ================================================================== [ 30.748397] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.749693] Read of size 8 at addr ffff8880158dc228 by task sshd/219 [ 30.750508] [ 30.750735] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.751649] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.752668] Call Trace: [ 30.753007] <TASK> [ 30.753303] dump_stack_lvl+0x91/0xf0 [ 30.753814] print_report+0xcc/0x620 [ 30.754327] ? __virt_addr_valid+0x102/0x340 [ 30.754906] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755552] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756198] kasan_report+0xbe/0xf0 [ 30.756717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757365] vma_interval_tree_remove+0xc75/0xec0 [ 30.757995] vma_prepare+0xc54/0x11a0 [ 30.758499] __split_vma+0x5af/0x950 [ 30.758989] ? __pfx___split_vma+0x10/0x10 [ 30.759546] ? find_held_lock+0x2c/0x110 [ 30.760090] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.760700] ? lock_is_held_type+0x9f/0x120 [ 30.761265] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.761900] ? mtree_range_walk+0x632/0x900 [ 30.762476] ? mas_walk+0x5c7/0x7c0 [ 30.762978] do_vmi_munmap+0x1f1/0x2b0 [ 30.763503] mmap_region+0x1f9/0x2660 [ 30.764007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.764548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.765300] ? __pfx_lock_acquire+0x10/0x10 [ 30.765852] ? __pfx_mmap_region+0x10/0x10 [ 30.766409] ? security_mmap_addr+0x7d/0xa0 [ 30.766961] ? get_unmapped_area+0x1f5/0x3f0 [ 30.767543] do_mmap+0x854/0xf00 [ 30.768004] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.768525] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.769129] ksys_mmap_pgoff+0x3af/0x500 [ 30.769653] do_syscall_64+0x3f/0x90 [ 30.770151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.770828] RIP: 0033:0x7f76c479fd82 [ 30.771312] 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 [ 30.773534] RSP: 002b:00007ffc7f4b81f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.774469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76c479fd82 [ 30.775348] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76c3bd9000 [ 30.776217] RBP: 00007f76c3bd9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.777111] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f91f196ec0 [ 30.777993] R13: 00007ffc7f4b8210 R14: 00007ffc7f4b8240 R15: 00007ffc7f4b85a0 [ 30.778880] </TASK> [ 30.779182] [ 30.779404] Allocated by task 212: [ 30.779852] kasan_save_stack+0x22/0x50 [ 30.780382] kasan_set_track+0x25/0x30 [ 30.780917] __kasan_slab_alloc+0x59/0x70 [ 30.781460] kmem_cache_alloc+0x16b/0x370 [ 30.781996] vm_area_dup+0x20/0x160 [ 30.782468] __split_vma+0x170/0x950 [ 30.782953] split_vma+0xc6/0x110 [ 30.783411] mprotect_fixup+0x8d2/0xb30 [ 30.783944] do_mprotect_pkey+0x87e/0xd40 [ 30.784484] __x64_sys_mprotect+0x78/0xc0 [ 30.785045] do_syscall_64+0x3f/0x90 [ 30.785539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786192] [ 30.786408] Freed by task 212: [ 30.786804] kasan_save_stack+0x22/0x50 [ 30.787310] kasan_set_track+0x25/0x30 [ 30.787814] kasan_save_free_info+0x2b/0x50 [ 30.788357] __kasan_slab_free+0x10a/0x190 [ 30.788904] kmem_cache_free+0x10d/0x4d0 [ 30.789412] rcu_core+0x8c8/0x2860 [ 30.789859] __do_softirq+0x1b7/0x7d4 [ 30.790349] [ 30.790575] Last potentially related work creation: [ 30.791167] kasan_save_stack+0x22/0x50 [ 30.791671] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.792919] remove_vma+0x139/0x170 [ 30.793383] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.793940] do_vmi_munmap+0x1f1/0x2b0 [ 30.794434] __vm_munmap+0x138/0x3a0 [ 30.794907] __x64_sys_munmap+0x59/0x80 [ 30.795414] do_syscall_64+0x3f/0x90 [ 30.795899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796553] [ 30.796770] The buggy address belongs to the object at ffff8880158dc1d0 [ 30.796770] which belongs to the cache vm_area_struct of size 168 [ 30.798261] The buggy address is located 88 bytes inside of [ 30.798261] freed 168-byte region [ffff8880158dc1d0, ffff8880158dc278) [ 30.799681] [ 30.799897] The buggy address belongs to the physical page: [ 30.800574] page:000000003a04e076 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158dc [ 30.801714] memcg:ffff888010006001 [ 30.802141] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.802792] page_type: 0xffffffff() [ 30.803247] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.804194] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010006001 [ 30.805117] page dumped because: kasan: bad access detected [ 30.805783] [ 30.805998] Memory state around the buggy address: [ 30.806589] ffff8880158dc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.807464] ffff8880158dc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.808336] >ffff8880158dc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.809204] ^ [ 30.809763] ffff8880158dc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.810623] ffff8880158dc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.811483] ================================================================== [ 30.812591] Disabling lock debugging due to kernel taint [ 32.854303] BUG: Bad rss-counter state mm:00000000465f2aff type:MM_FILEPAGES val:33 [ 32.855428] BUG: Bad rss-counter state mm:00000000465f2aff type:MM_ANONPAGES val:22 [ 33.328224] BUG: Bad rss-counter state mm:00000000b1aa6ad4 type:MM_FILEPAGES val:33 [ 33.329490] BUG: Bad rss-counter state mm:00000000b1aa6ad4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57076' (ECDSA) to the list of known hosts. 2023/06/21 10:33:08 fuzzer started 2023/06/21 10:33:08 dialing manager at localhost:36067 2023/06/21 10:33:08 checking machine... 2023/06/21 10:33:08 checking revisions... [ 34.117727] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:33:09 testing simple program... [ 34.169944] cgroup: Unknown subsys name 'net' [ 34.246908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:33:08 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=00007f9d110cf910 CR3=000000000e24a000 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=c260a967cc0e068c124adf4daf6f61ca XMM02=000000000011ca00ec2efd57dc4c00df XMM03=00000000001237a8501f2b7546c8e6ab XMM04=691b9536d2f2c79000000000000ae988 XMM05=dfcdbad4f1609c3700000000001335d8 XMM06=806171799158d9670000000000133460 XMM07=e042d86d42eb936e0000000000124190 XMM08=501f2b7546c8e6ab000000000011ca60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000065 RCX=ffffffff83723c94 RDX=ffff88800f4551c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000066 RSP=ffff88801c67f7b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99e08 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0408 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd0dd13d900 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=00007ffcc77fd000 CR3=000000001be22000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000