syzkaller login: [ 35.195156] BUG: Bad rss-counter state mm:00000000fbecd593 type:MM_FILEPAGES val:33 [ 35.196162] BUG: Bad rss-counter state mm:00000000fbecd593 type:MM_ANONPAGES val:22 [ 35.320670] ================================================================== [ 35.321293] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.321952] Read of size 8 at addr ffff88800f60b058 by task sshd/219 [ 35.322497] [ 35.322641] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.323193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.323821] Call Trace: [ 35.324029] [ 35.324215] dump_stack_lvl+0x91/0xf0 [ 35.324769] print_report+0xcc/0x620 [ 35.325092] ? __virt_addr_valid+0x102/0x340 [ 35.325454] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.325892] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.326285] kasan_report+0xbe/0xf0 [ 35.326614] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.327080] vma_interval_tree_remove+0xc75/0xec0 [ 35.327470] vma_prepare+0xc54/0x11a0 [ 35.327780] __split_vma+0x5af/0x950 [ 35.328087] ? __pfx___split_vma+0x10/0x10 [ 35.328434] ? find_held_lock+0x2c/0x110 [ 35.328760] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.329120] ? lock_is_held_type+0x9f/0x120 [ 35.329476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.329902] ? mtree_range_walk+0x632/0x900 [ 35.330273] ? mas_walk+0x5c7/0x7c0 [ 35.330650] do_vmi_munmap+0x1f1/0x2b0 [ 35.331019] mmap_region+0x1f9/0x2660 [ 35.331337] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.331683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.332167] ? __pfx_lock_acquire+0x10/0x10 [ 35.332527] ? __pfx_mmap_region+0x10/0x10 [ 35.332874] ? security_mmap_addr+0x7d/0xa0 [ 35.333219] ? get_unmapped_area+0x1f5/0x3f0 [ 35.333600] do_mmap+0x854/0xf00 [ 35.333906] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.334233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.334630] ksys_mmap_pgoff+0x3af/0x500 [ 35.334960] do_syscall_64+0x3f/0x90 [ 35.335269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.335708] RIP: 0033:0x7f63dc14ad82 [ 35.336018] 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 [ 35.337431] RSP: 002b:00007ffe138f4b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.338063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63dc14ad82 [ 35.338680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63db584000 [ 35.339227] RBP: 00007f63db584000 R08: 0000000000000009 R09: 0000000000001000 [ 35.339793] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f93c7fec0 [ 35.340406] R13: 00007ffe138f4b70 R14: 00007ffe138f4ba0 R15: 00007ffe138f4f00 [ 35.340979] [ 35.341179] [ 35.341326] Allocated by task 212: [ 35.341625] kasan_save_stack+0x22/0x50 [ 35.341949] kasan_set_track+0x25/0x30 [ 35.342271] __kasan_slab_alloc+0x59/0x70 [ 35.342636] kmem_cache_alloc+0x16b/0x370 [ 35.342976] vm_area_dup+0x20/0x160 [ 35.343278] __split_vma+0x170/0x950 [ 35.343595] split_vma+0xc6/0x110 [ 35.343924] mprotect_fixup+0x8d2/0xb30 [ 35.344270] do_mprotect_pkey+0x87e/0xd40 [ 35.344617] __x64_sys_mprotect+0x78/0xc0 [ 35.345013] do_syscall_64+0x3f/0x90 [ 35.345330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.345769] [ 35.345929] Freed by task 212: [ 35.346186] kasan_save_stack+0x22/0x50 [ 35.346560] kasan_set_track+0x25/0x30 [ 35.346896] kasan_save_free_info+0x2b/0x50 [ 35.347253] __kasan_slab_free+0x10a/0x190 [ 35.347613] kmem_cache_free+0x10d/0x4d0 [ 35.347987] rcu_core+0x8c8/0x2860 [ 35.348292] __do_softirq+0x1b7/0x7d4 [ 35.348611] [ 35.348760] Last potentially related work creation: [ 35.349155] kasan_save_stack+0x22/0x50 [ 35.349490] __kasan_record_aux_stack+0x8e/0xa0 [ 35.349873] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.350302] remove_vma+0x139/0x170 [ 35.350644] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.351020] do_vmi_munmap+0x1f1/0x2b0 [ 35.351341] __vm_munmap+0x138/0x3a0 [ 35.351645] __x64_sys_munmap+0x59/0x80 [ 35.351979] do_syscall_64+0x3f/0x90 [ 35.352299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.352743] [ 35.352916] The buggy address belongs to the object at ffff88800f60b000 [ 35.352916] which belongs to the cache vm_area_struct of size 168 [ 35.353899] The buggy address is located 88 bytes inside of [ 35.353899] freed 168-byte region [ffff88800f60b000, ffff88800f60b0a8) [ 35.354868] [ 35.355006] The buggy address belongs to the physical page: [ 35.355417] page:00000000718c129d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf60b [ 35.356088] memcg:ffff88800f59c101 [ 35.356360] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.356793] page_type: 0xffffffff() [ 35.357086] raw: 0100000000000200 ffff88800879fc80 ffffea00003f4ac0 0000000000000002 [ 35.357686] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f59c101 [ 35.358300] page dumped because: kasan: bad access detected [ 35.358746] [ 35.358885] Memory state around the buggy address: [ 35.359266] ffff88800f60af00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 35.359827] ffff88800f60af80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 35.360377] >ffff88800f60b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.360918] ^ [ 35.361397] ffff88800f60b080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.361970] ffff88800f60b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.362516] ================================================================== [ 35.363189] Disabling lock debugging due to kernel taint [ 37.141858] BUG: Bad rss-counter state mm:000000004f586199 type:MM_FILEPAGES val:33 [ 37.142617] BUG: Bad rss-counter state mm:000000004f586199 type:MM_ANONPAGES val:22 [ 37.488272] BUG: Bad rss-counter state mm:00000000ee0236a5 type:MM_FILEPAGES val:33 [ 37.488969] BUG: Bad rss-counter state mm:00000000ee0236a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36159' (ECDSA) to the list of known hosts. 2023/06/20 09:21:42 fuzzer started 2023/06/20 09:21:42 dialing manager at localhost:44161 2023/06/20 09:21:42 checking machine... 2023/06/20 09:21:42 checking revisions... [ 37.992111] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:21:42 testing simple program... [ 38.030572] cgroup: Unknown subsys name 'net' [ 38.068198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:21:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09e58 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800dfc3680 R15=ffff888016755ec0 RIP=ffffffff8113038e 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 00007fe266b0f900 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=00007fe2670c4650 CR3=000000000eb2e000 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=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe0824b298 CR3=000000000e82c000 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=ffffffff000000000000000000000000 XMM02=ffffffff000000000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f19af487c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000726f7475636578652d7a7973 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000