syzkaller login: [ 33.126062] BUG: Bad rss-counter state mm:0000000010220e60 type:MM_FILEPAGES val:33 [ 33.127684] BUG: Bad rss-counter state mm:0000000010220e60 type:MM_ANONPAGES val:22 [ 33.283969] ================================================================== [ 33.285009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.286075] Read of size 8 at addr ffff88801659fa50 by task sshd/220 [ 33.287058] [ 33.287314] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.288263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.289373] Call Trace: [ 33.289726] [ 33.290073] dump_stack_lvl+0x91/0xf0 [ 33.290611] print_report+0xcc/0x620 [ 33.291150] ? __virt_addr_valid+0x102/0x340 [ 33.291766] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.292445] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.293142] kasan_report+0xbe/0xf0 [ 33.293668] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.294397] vma_interval_tree_remove+0xc75/0xec0 [ 33.295070] vma_prepare+0xc54/0x11a0 [ 33.295597] __split_vma+0x5af/0x950 [ 33.296123] ? __pfx___split_vma+0x10/0x10 [ 33.296733] ? find_held_lock+0x2c/0x110 [ 33.297316] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.297988] ? lock_is_held_type+0x9f/0x120 [ 33.298596] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.299269] ? mtree_range_walk+0x632/0x900 [ 33.299890] ? mas_walk+0x5c7/0x7c0 [ 33.300419] do_vmi_munmap+0x1f1/0x2b0 [ 33.300985] mmap_region+0x1f9/0x2660 [ 33.301518] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.302123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.302916] ? __pfx_lock_acquire+0x10/0x10 [ 33.303505] ? __pfx_mmap_region+0x10/0x10 [ 33.304092] ? security_mmap_addr+0x7d/0xa0 [ 33.304690] ? get_unmapped_area+0x1f5/0x3f0 [ 33.305302] do_mmap+0x854/0xf00 [ 33.305802] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.306371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.306992] ksys_mmap_pgoff+0x3af/0x500 [ 33.307560] do_syscall_64+0x3f/0x90 [ 33.308090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.308841] RIP: 0033:0x7fc3a9426d82 [ 33.309350] 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 [ 33.311755] RSP: 002b:00007ffcfaa163a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.312788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3a9426d82 [ 33.313747] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3a8860000 [ 33.314667] RBP: 00007fc3a8860000 R08: 0000000000000009 R09: 0000000000001000 [ 33.315544] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556296245ec0 [ 33.316433] R13: 00007ffcfaa163c0 R14: 00007ffcfaa163f0 R15: 00007ffcfaa16750 [ 33.317359] [ 33.317668] [ 33.317932] Allocated by task 213: [ 33.318383] kasan_save_stack+0x22/0x50 [ 33.318906] kasan_set_track+0x25/0x30 [ 33.319429] __kasan_slab_alloc+0x59/0x70 [ 33.319981] kmem_cache_alloc+0x16b/0x370 [ 33.320543] vm_area_dup+0x20/0x160 [ 33.321024] __split_vma+0x170/0x950 [ 33.321510] split_vma+0xc6/0x110 [ 33.322007] mprotect_fixup+0x8d2/0xb30 [ 33.322542] do_mprotect_pkey+0x87e/0xd40 [ 33.323082] __x64_sys_mprotect+0x78/0xc0 [ 33.323616] do_syscall_64+0x3f/0x90 [ 33.324116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.324800] [ 33.325021] Freed by task 19: [ 33.325423] kasan_save_stack+0x22/0x50 [ 33.325989] kasan_set_track+0x25/0x30 [ 33.326504] kasan_save_free_info+0x2b/0x50 [ 33.327053] __kasan_slab_free+0x10a/0x190 [ 33.327601] kmem_cache_free+0x10d/0x4d0 [ 33.328231] rcu_core+0x8c8/0x2860 [ 33.328716] __do_softirq+0x1b7/0x7d4 [ 33.329207] [ 33.329433] Last potentially related work creation: [ 33.330075] kasan_save_stack+0x22/0x50 [ 33.330606] __kasan_record_aux_stack+0x8e/0xa0 [ 33.331204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.331880] remove_vma+0x139/0x170 [ 33.332363] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.332971] do_vmi_munmap+0x1f1/0x2b0 [ 33.333481] __vm_munmap+0x138/0x3a0 [ 33.334012] __x64_sys_munmap+0x59/0x80 [ 33.334521] do_syscall_64+0x3f/0x90 [ 33.335007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.335681] [ 33.335903] The buggy address belongs to the object at ffff88801659f9f8 [ 33.335903] which belongs to the cache vm_area_struct of size 168 [ 33.337465] The buggy address is located 88 bytes inside of [ 33.337465] freed 168-byte region [ffff88801659f9f8, ffff88801659faa0) [ 33.339004] [ 33.339237] The buggy address belongs to the physical page: [ 33.339943] page:00000000125380bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1659f [ 33.341125] memcg:ffff888013e9ea01 [ 33.341580] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.342298] page_type: 0xffffffff() [ 33.342783] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.343780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e9ea01 [ 33.344781] page dumped because: kasan: bad access detected [ 33.345457] [ 33.345671] Memory state around the buggy address: [ 33.346245] ffff88801659f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.347120] ffff88801659f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.347983] >ffff88801659fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.348856] ^ [ 33.349551] ffff88801659fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.350417] ffff88801659fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.351304] ================================================================== [ 33.352293] Disabling lock debugging due to kernel taint [ 35.693710] BUG: Bad rss-counter state mm:0000000028dd906c type:MM_FILEPAGES val:33 [ 35.694705] BUG: Bad rss-counter state mm:0000000028dd906c type:MM_ANONPAGES val:22 [ 36.245315] BUG: Bad rss-counter state mm:00000000622e76dc type:MM_FILEPAGES val:33 [ 36.246523] BUG: Bad rss-counter state mm:00000000622e76dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55959' (ECDSA) to the list of known hosts. 2023/06/19 21:45:54 fuzzer started 2023/06/19 21:45:54 dialing manager at localhost:44161 2023/06/19 21:45:54 checking machine... 2023/06/19 21:45:54 checking revisions... [ 36.988345] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:45:54 testing simple program... [ 37.046274] cgroup: Unknown subsys name 'net' [ 37.094644] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:45:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b38 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff8363c466 RDI=ffff88806ce09b44 RBP=0000000000000019 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000009a8db R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff88800e079b40 R15=ffff88800eb00200 RIP=ffffffff813ad49e RFL=00000213 [----A-C] 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 00007f5b92204900 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=00007f5b927b9650 CR3=0000000016728000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ff6c9ea79a0 CR3=000000000c554000 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=65f478d5dcfb2f918f4c5e173fa9af04 XMM02=000000000011cc38ec2efd57dc4c00df XMM03=00000000001241b00c7b081a0d217d05 XMM04=f52b51c33e396f4100000000000ae988 XMM05=453cdd178f4bea240000000000134ba0 XMM06=4fda316b135da52b0000000000133c40 XMM07=e042d86d42eb936e0000000000124430 XMM08=0c7b081a0d217d05000000000011cc98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000