syzkaller login: [ 33.103288] BUG: Bad rss-counter state mm:000000009c53b916 type:MM_FILEPAGES val:33 [ 33.104541] BUG: Bad rss-counter state mm:000000009c53b916 type:MM_ANONPAGES val:22 [ 33.274228] ================================================================== [ 33.275151] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.276106] Read of size 8 at addr ffff88800d48d3f8 by task sshd/220 [ 33.276902] [ 33.277126] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.278182] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.279190] Call Trace: [ 33.279519] [ 33.279814] dump_stack_lvl+0x91/0xf0 [ 33.280471] print_report+0xcc/0x620 [ 33.281060] ? __virt_addr_valid+0x102/0x340 [ 33.281716] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.282451] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.283182] kasan_report+0xbe/0xf0 [ 33.283743] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.284481] vma_interval_tree_remove+0xc75/0xec0 [ 33.285191] vma_prepare+0xc54/0x11a0 [ 33.285759] __split_vma+0x5af/0x950 [ 33.286318] ? __pfx___split_vma+0x10/0x10 [ 33.286941] ? find_held_lock+0x2c/0x110 [ 33.287549] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.288242] ? lock_is_held_type+0x9f/0x120 [ 33.288879] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.289545] ? mtree_range_walk+0x632/0x900 [ 33.290117] ? mas_walk+0x5c7/0x7c0 [ 33.290610] do_vmi_munmap+0x1f1/0x2b0 [ 33.291111] mmap_region+0x1f9/0x2660 [ 33.291601] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.292123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.292861] ? __pfx_lock_acquire+0x10/0x10 [ 33.293407] ? __pfx_mmap_region+0x10/0x10 [ 33.293954] ? security_mmap_addr+0x7d/0xa0 [ 33.294503] ? get_unmapped_area+0x1f5/0x3f0 [ 33.295066] do_mmap+0x854/0xf00 [ 33.295523] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.296032] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.296627] ksys_mmap_pgoff+0x3af/0x500 [ 33.297145] do_syscall_64+0x3f/0x90 [ 33.297628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.298290] RIP: 0033:0x7f22bbc13d82 [ 33.298759] 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 [ 33.300973] RSP: 002b:00007fffe25a9e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.301896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22bbc13d82 [ 33.302778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22bb04d000 [ 33.303654] RBP: 00007f22bb04d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.304517] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f461fbdb20 [ 33.305384] R13: 00007fffe25a9e40 R14: 00007fffe25a9e70 R15: 00007fffe25aa1d0 [ 33.306259] [ 33.306560] [ 33.306776] Allocated by task 213: [ 33.307213] kasan_save_stack+0x22/0x50 [ 33.307721] kasan_set_track+0x25/0x30 [ 33.308252] __kasan_slab_alloc+0x59/0x70 [ 33.308788] kmem_cache_alloc+0x16b/0x370 [ 33.309307] vm_area_dup+0x20/0x160 [ 33.309771] __split_vma+0x170/0x950 [ 33.310254] split_vma+0xc6/0x110 [ 33.310700] mprotect_fixup+0x8d2/0xb30 [ 33.311210] do_mprotect_pkey+0x87e/0xd40 [ 33.311749] __x64_sys_mprotect+0x78/0xc0 [ 33.312283] do_syscall_64+0x3f/0x90 [ 33.312767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.313424] [ 33.313649] Freed by task 0: [ 33.314027] kasan_save_stack+0x22/0x50 [ 33.314527] kasan_set_track+0x25/0x30 [ 33.315034] kasan_save_free_info+0x2b/0x50 [ 33.315572] __kasan_slab_free+0x10a/0x190 [ 33.316111] kmem_cache_free+0x10d/0x4d0 [ 33.316646] rcu_core+0x8c8/0x2860 [ 33.317107] __do_softirq+0x1b7/0x7d4 [ 33.317595] [ 33.317817] Last potentially related work creation: [ 33.318407] kasan_save_stack+0x22/0x50 [ 33.319002] __kasan_record_aux_stack+0x8e/0xa0 [ 33.319594] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.320252] remove_vma+0x139/0x170 [ 33.320705] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.321273] do_vmi_munmap+0x1f1/0x2b0 [ 33.321764] __vm_munmap+0x138/0x3a0 [ 33.322236] __x64_sys_munmap+0x59/0x80 [ 33.322727] do_syscall_64+0x3f/0x90 [ 33.323197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.323832] [ 33.324048] Second to last potentially related work creation: [ 33.324753] kasan_save_stack+0x22/0x50 [ 33.325253] __kasan_record_aux_stack+0x8e/0xa0 [ 33.325841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.326491] remove_vma+0x139/0x170 [ 33.326945] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.327511] do_vmi_munmap+0x1f1/0x2b0 [ 33.328001] mmap_region+0x1f9/0x2660 [ 33.328504] do_mmap+0x854/0xf00 [ 33.328947] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.329440] ksys_mmap_pgoff+0x3af/0x500 [ 33.329942] do_syscall_64+0x3f/0x90 [ 33.330422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.331062] [ 33.331278] The buggy address belongs to the object at ffff88800d48d3a0 [ 33.331278] which belongs to the cache vm_area_struct of size 168 [ 33.332773] The buggy address is located 88 bytes inside of [ 33.332773] freed 168-byte region [ffff88800d48d3a0, ffff88800d48d448) [ 33.334312] [ 33.334558] The buggy address belongs to the physical page: [ 33.335317] page:00000000fe5ddeda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd48d [ 33.336590] memcg:ffff88800dfc2901 [ 33.337074] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.337814] page_type: 0xffffffff() [ 33.338330] raw: 0100000000000200 ffff88800879fc80 ffffea0000385180 dead000000000002 [ 33.339379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc2901 [ 33.340422] page dumped because: kasan: bad access detected [ 33.341177] [ 33.341429] Memory state around the buggy address: [ 33.342090] ffff88800d48d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.343066] ffff88800d48d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.344033] >ffff88800d48d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.345011] ^ [ 33.345973] ffff88800d48d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.346933] ffff88800d48d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.347891] ================================================================== [ 33.349206] Disabling lock debugging due to kernel taint [ 35.583335] BUG: Bad rss-counter state mm:0000000079f0768b type:MM_FILEPAGES val:33 [ 35.584324] BUG: Bad rss-counter state mm:0000000079f0768b type:MM_ANONPAGES val:22 [ 36.044833] BUG: Bad rss-counter state mm:00000000a1a20bc3 type:MM_FILEPAGES val:33 [ 36.046069] BUG: Bad rss-counter state mm:00000000a1a20bc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19690' (ECDSA) to the list of known hosts. 2023/06/19 20:50:57 fuzzer started 2023/06/19 20:50:57 dialing manager at localhost:44161 2023/06/19 20:50:57 checking machine... 2023/06/19 20:50:57 checking revisions... [ 36.808315] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:50:57 testing simple program... [ 36.856485] cgroup: Unknown subsys name 'net' [ 36.899939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:50:53 Registers: info registers vcpu 0 RAX=1ffff11002ec18ab RBX=ffff88801760c528 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801760c558 RBP=ffff888018d0a000 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=1ffff1100d9c7479 R12=dffffc0000000000 R13=ffff888018d0c540 R14=ffffffff818d9dc6 R15=ffff888009a0c900 RIP=ffffffff8184636c RFL=00000046 [---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 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=00007f758a4e2880 CR3=00000000197e8000 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=2036353a30353a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a30353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888018e3b3c0 RCX=0000000000000000 RDX=1ffff110031c7678 RSI=ffffffff83865ee4 RDI=ffffffff87f94640 RBP=ffffffff87f94640 RSP=ffff88800fabfdc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000009 R13=0000000000000009 R14=ffff888018e3b3c0 R15=0000000000000000 RIP=ffffffff83865ef9 RFL=00000216 [----AP-] 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 00007f2fd49a2900 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=00007ffe0848e000 CR3=000000000da2e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000