syzkaller login: [ 30.653789] BUG: Bad rss-counter state mm:0000000073967000 type:MM_FILEPAGES val:33 [ 30.654794] BUG: Bad rss-counter state mm:0000000073967000 type:MM_ANONPAGES val:22 [ 30.826503] ================================================================== [ 30.827573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.828665] Read of size 8 at addr ffff888016cb9880 by task sshd/220 [ 30.829540] [ 30.829757] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.830626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.831613] Call Trace: [ 30.831938] [ 30.832236] dump_stack_lvl+0x91/0xf0 [ 30.832730] print_report+0xcc/0x620 [ 30.833216] ? __virt_addr_valid+0x102/0x340 [ 30.833770] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.834383] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.835001] kasan_report+0xbe/0xf0 [ 30.835476] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836111] vma_interval_tree_remove+0xc75/0xec0 [ 30.836715] vma_prepare+0xc54/0x11a0 [ 30.837199] __split_vma+0x5af/0x950 [ 30.837679] ? __pfx___split_vma+0x10/0x10 [ 30.838213] ? find_held_lock+0x2c/0x110 [ 30.838735] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.839304] ? lock_is_held_type+0x9f/0x120 [ 30.839844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.840485] ? mtree_range_walk+0x632/0x900 [ 30.841044] ? mas_walk+0x5c7/0x7c0 [ 30.841524] do_vmi_munmap+0x1f1/0x2b0 [ 30.842020] mmap_region+0x1f9/0x2660 [ 30.842508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.843026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.843749] ? __pfx_lock_acquire+0x10/0x10 [ 30.844288] ? __pfx_mmap_region+0x10/0x10 [ 30.844825] ? security_mmap_addr+0x7d/0xa0 [ 30.845362] ? get_unmapped_area+0x1f5/0x3f0 [ 30.845919] do_mmap+0x854/0xf00 [ 30.846358] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.846862] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.847422] ksys_mmap_pgoff+0x3af/0x500 [ 30.847932] do_syscall_64+0x3f/0x90 [ 30.848435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.849091] RIP: 0033:0x7fb30c84fd82 [ 30.849552] 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 [ 30.851691] RSP: 002b:00007fff032e42b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.852619] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb30c84fd82 [ 30.853483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb30bc89000 [ 30.854334] RBP: 00007fb30bc89000 R08: 0000000000000009 R09: 0000000000001000 [ 30.855182] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffe314cb20 [ 30.856047] R13: 00007fff032e42d0 R14: 00007fff032e4300 R15: 00007fff032e4660 [ 30.856938] [ 30.857233] [ 30.857451] Allocated by task 213: [ 30.857887] kasan_save_stack+0x22/0x50 [ 30.858395] kasan_set_track+0x25/0x30 [ 30.858899] __kasan_slab_alloc+0x59/0x70 [ 30.859430] kmem_cache_alloc+0x16b/0x370 [ 30.859951] vm_area_dup+0x20/0x160 [ 30.860423] __split_vma+0x170/0x950 [ 30.860891] split_vma+0xc6/0x110 [ 30.861338] mprotect_fixup+0x8d2/0xb30 [ 30.861844] do_mprotect_pkey+0x87e/0xd40 [ 30.862373] __x64_sys_mprotect+0x78/0xc0 [ 30.862906] do_syscall_64+0x3f/0x90 [ 30.863383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.864042] [ 30.864267] Freed by task 213: [ 30.864664] kasan_save_stack+0x22/0x50 [ 30.865171] kasan_set_track+0x25/0x30 [ 30.865667] kasan_save_free_info+0x2b/0x50 [ 30.866202] __kasan_slab_free+0x10a/0x190 [ 30.866741] kmem_cache_free+0x10d/0x4d0 [ 30.867259] rcu_core+0x8c8/0x2860 [ 30.867717] __do_softirq+0x1b7/0x7d4 [ 30.868212] [ 30.868430] Last potentially related work creation: [ 30.869023] kasan_save_stack+0x22/0x50 [ 30.869539] __kasan_record_aux_stack+0x8e/0xa0 [ 30.870116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.870773] remove_vma+0x139/0x170 [ 30.871235] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.871798] do_vmi_munmap+0x1f1/0x2b0 [ 30.872296] __vm_munmap+0x138/0x3a0 [ 30.872769] __x64_sys_munmap+0x59/0x80 [ 30.873277] do_syscall_64+0x3f/0x90 [ 30.873761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874412] [ 30.874628] The buggy address belongs to the object at ffff888016cb9828 [ 30.874628] which belongs to the cache vm_area_struct of size 168 [ 30.876139] The buggy address is located 88 bytes inside of [ 30.876139] freed 168-byte region [ffff888016cb9828, ffff888016cb98d0) [ 30.877558] [ 30.877776] The buggy address belongs to the physical page: [ 30.878447] page:00000000733e52a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cb9 [ 30.879548] memcg:ffff888015f42601 [ 30.879978] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880641] page_type: 0xffffffff() [ 30.881094] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.882031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f42601 [ 30.882956] page dumped because: kasan: bad access detected [ 30.883627] [ 30.883844] Memory state around the buggy address: [ 30.884435] ffff888016cb9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.885304] ffff888016cb9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.886184] >ffff888016cb9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.887042] ^ [ 30.887460] ffff888016cb9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.888346] ffff888016cb9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.889199] ================================================================== [ 30.890184] Disabling lock debugging due to kernel taint [ 33.448879] BUG: Bad rss-counter state mm:0000000007f9c2dc type:MM_FILEPAGES val:33 [ 33.449822] BUG: Bad rss-counter state mm:0000000007f9c2dc type:MM_ANONPAGES val:22 [ 34.005085] BUG: Bad rss-counter state mm:000000009ef8c785 type:MM_FILEPAGES val:33 [ 34.006224] BUG: Bad rss-counter state mm:000000009ef8c785 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55343' (ECDSA) to the list of known hosts. 2023/06/21 07:12:52 fuzzer started 2023/06/21 07:12:52 dialing manager at localhost:36067 2023/06/21 07:12:52 checking machine... 2023/06/21 07:12:52 checking revisions... [ 34.609631] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:12:53 testing simple program... [ 34.649100] cgroup: Unknown subsys name 'net' [ 34.706107] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:12:52 Registers: info registers vcpu 0 RAX=ffffffff8363de3d RBX=ffffffff85fa53a8 RCX=ffffffff8363e063 RDX=0000000000000000 RSI=ffffffff863b3bde RDI=ffffffff85fa53a8 RBP=ffffffff85fa53ac RSP=ffff888016857798 R8 =ffffffff863b3bde R9 =ffff888016857890 R10=0000000000038001 R11=000000000008aa79 R12=ffffffff85fa53a8 R13=ffffffff85fa53a8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007fe7c818e900 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=00007fff26d99000 CR3=00000000166e2000 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=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 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=00007f0b9270d040 CR3=0000000009462000 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=2032353a32313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a32313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000