syzkaller login: [ 28.855312] BUG: Bad rss-counter state mm:00000000a595803b type:MM_FILEPAGES val:33 [ 28.856636] BUG: Bad rss-counter state mm:00000000a595803b type:MM_ANONPAGES val:22 [ 28.891248] ================================================================== [ 28.892299] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.893317] Read of size 8 at addr ffff88800cb81c20 by task sshd/220 [ 28.894231] [ 28.894466] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.895491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.896628] Call Trace: [ 28.897067] [ 28.897362] dump_stack_lvl+0x91/0xf0 [ 28.897918] print_report+0xcc/0x620 [ 28.898423] ? __virt_addr_valid+0x102/0x340 [ 28.899098] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.899798] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.900433] kasan_report+0xbe/0xf0 [ 28.901014] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.901693] vma_interval_tree_remove+0xc75/0xec0 [ 28.902319] vma_prepare+0xc54/0x11a0 [ 28.902884] __split_vma+0x5af/0x950 [ 28.903409] ? __pfx___split_vma+0x10/0x10 [ 28.904021] ? find_held_lock+0x2c/0x110 [ 28.904569] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.905262] ? lock_is_held_type+0x9f/0x120 [ 28.905829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.906477] ? mtree_range_walk+0x632/0x900 [ 28.907060] ? mas_walk+0x5c7/0x7c0 [ 28.907568] do_vmi_munmap+0x1f1/0x2b0 [ 28.908085] mmap_region+0x1f9/0x2660 [ 28.908588] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.909124] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.909872] ? __pfx_lock_acquire+0x10/0x10 [ 28.910431] ? __pfx_mmap_region+0x10/0x10 [ 28.910982] ? security_mmap_addr+0x7d/0xa0 [ 28.911563] ? get_unmapped_area+0x1f5/0x3f0 [ 28.912145] do_mmap+0x854/0xf00 [ 28.912583] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.913083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.913648] ksys_mmap_pgoff+0x3af/0x500 [ 28.914152] do_syscall_64+0x3f/0x90 [ 28.914641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915306] RIP: 0033:0x7fc6a7ef4d82 [ 28.915770] 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 [ 28.918038] RSP: 002b:00007ffd5bf30da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.919006] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6a7ef4d82 [ 28.919943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6a732e000 [ 28.920855] RBP: 00007fc6a732e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.921765] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629f7fffec0 [ 28.922650] R13: 00007ffd5bf30dc0 R14: 00007ffd5bf30df0 R15: 00007ffd5bf31150 [ 28.923523] [ 28.923827] [ 28.924043] Allocated by task 213: [ 28.924481] kasan_save_stack+0x22/0x50 [ 28.924992] kasan_set_track+0x25/0x30 [ 28.925497] __kasan_slab_alloc+0x59/0x70 [ 28.926025] kmem_cache_alloc+0x16b/0x370 [ 28.926636] vm_area_dup+0x20/0x160 [ 28.927098] __split_vma+0x170/0x950 [ 28.927582] split_vma+0xc6/0x110 [ 28.928027] mprotect_fixup+0x8d2/0xb30 [ 28.928534] do_mprotect_pkey+0x87e/0xd40 [ 28.929060] __x64_sys_mprotect+0x78/0xc0 [ 28.929578] do_syscall_64+0x3f/0x90 [ 28.930051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930699] [ 28.930919] Freed by task 213: [ 28.931317] kasan_save_stack+0x22/0x50 [ 28.931822] kasan_set_track+0x25/0x30 [ 28.932322] kasan_save_free_info+0x2b/0x50 [ 28.932850] __kasan_slab_free+0x10a/0x190 [ 28.933386] kmem_cache_free+0x10d/0x4d0 [ 28.933898] rcu_core+0x8c8/0x2860 [ 28.934347] __do_softirq+0x1b7/0x7d4 [ 28.934826] [ 28.935043] Last potentially related work creation: [ 28.935648] kasan_save_stack+0x22/0x50 [ 28.936156] __kasan_record_aux_stack+0x8e/0xa0 [ 28.936731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.937378] remove_vma+0x139/0x170 [ 28.937834] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.938394] do_vmi_munmap+0x1f1/0x2b0 [ 28.938885] __vm_munmap+0x138/0x3a0 [ 28.939368] __x64_sys_munmap+0x59/0x80 [ 28.939866] do_syscall_64+0x3f/0x90 [ 28.940345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.940993] [ 28.941207] The buggy address belongs to the object at ffff88800cb81bc8 [ 28.941207] which belongs to the cache vm_area_struct of size 168 [ 28.942691] The buggy address is located 88 bytes inside of [ 28.942691] freed 168-byte region [ffff88800cb81bc8, ffff88800cb81c70) [ 28.944120] [ 28.944337] The buggy address belongs to the physical page: [ 28.945001] page:0000000004d9a15b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb81 [ 28.946089] memcg:ffff8880144c9201 [ 28.946515] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.947236] page_type: 0xffffffff() [ 28.947693] raw: 0100000000000200 ffff8880087a0c80 ffffea0000510880 dead000000000007 [ 28.948612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144c9201 [ 28.949521] page dumped because: kasan: bad access detected [ 28.950184] [ 28.950403] Memory state around the buggy address: [ 28.950993] ffff88800cb81b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.951873] ffff88800cb81b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.952774] >ffff88800cb81c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.954168] ^ [ 28.954872] ffff88800cb81c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.956036] ffff88800cb81d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.957184] ================================================================== [ 28.958591] Disabling lock debugging due to kernel taint [ 30.998083] BUG: Bad rss-counter state mm:00000000f1533a56 type:MM_FILEPAGES val:33 [ 30.999315] BUG: Bad rss-counter state mm:00000000f1533a56 type:MM_ANONPAGES val:22 [ 31.483072] BUG: Bad rss-counter state mm:00000000ef1b69b2 type:MM_FILEPAGES val:33 [ 31.484274] BUG: Bad rss-counter state mm:00000000ef1b69b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7502' (ECDSA) to the list of known hosts. 2023/06/21 01:07:24 fuzzer started 2023/06/21 01:07:24 dialing manager at localhost:36067 2023/06/21 01:07:24 checking machine... 2023/06/21 01:07:24 checking revisions... [ 32.202895] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:07:24 testing simple program... [ 32.250898] cgroup: Unknown subsys name 'net' [ 32.309820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:07:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018aca068 RCX=ffffffff818dbc53 RDX=ffff8880145b3680 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888016497b70 RSP=ffff888016497b10 R8 =0000000000000006 R9 =0000000032b499cf R10=0000000032d31e4f R11=0000000000000000 R12=0000000064924d4b R13=0000000000000002 R14=0000000032b499cf R15=ffff888018aca068 RIP=ffffffff818dbb3f RFL=00000283 [--S---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 00007fe94ffff700 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=00007ffbaa0a3618 CR3=000000001974e000 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=2033323a37303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37303a3130203132 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007fa40c2ad9a0 CR3=0000000009888000 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=5677bfb83de94287894767a0a6716985 XMM02=000000000011c350eff9b2d0a8fce9cb XMM03=000000000011c4202c67c8bc2e329bc3 XMM04=6081092856a2b26500000000000ae988 XMM05=19e9129bd510f2350000000000133260 XMM06=77237bc409138e3800000000001320c8 XMM07=e042d86d42eb936e0000000000123e18 XMM08=85d3659b1e1df798000000000011c420 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000