syzkaller login: [ 29.161265] BUG: Bad rss-counter state mm:000000003da1b7ad type:MM_FILEPAGES val:33 [ 29.161845] BUG: Bad rss-counter state mm:000000003da1b7ad type:MM_ANONPAGES val:22 [ 29.278081] ================================================================== [ 29.278789] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.279512] Read of size 8 at addr ffff888017d81880 by task sshd/220 [ 29.280105] [ 29.280271] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.280928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.281682] Call Trace: [ 29.282022] [ 29.282240] dump_stack_lvl+0x91/0xf0 [ 29.282638] print_report+0xcc/0x620 [ 29.283012] ? __virt_addr_valid+0x102/0x340 [ 29.283446] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.283818] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.284168] kasan_report+0xbe/0xf0 [ 29.284433] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.284771] vma_interval_tree_remove+0xc75/0xec0 [ 29.285102] vma_prepare+0xc54/0x11a0 [ 29.285366] __split_vma+0x5af/0x950 [ 29.285626] ? __pfx___split_vma+0x10/0x10 [ 29.285916] ? find_held_lock+0x2c/0x110 [ 29.286205] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.286519] ? lock_is_held_type+0x9f/0x120 [ 29.286826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.287160] ? mtree_range_walk+0x632/0x900 [ 29.287470] ? mas_walk+0x5c7/0x7c0 [ 29.287747] do_vmi_munmap+0x1f1/0x2b0 [ 29.288030] mmap_region+0x1f9/0x2660 [ 29.288319] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.288617] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.289044] ? __pfx_lock_acquire+0x10/0x10 [ 29.289355] ? __pfx_mmap_region+0x10/0x10 [ 29.289666] ? security_mmap_addr+0x7d/0xa0 [ 29.289980] ? get_unmapped_area+0x1f5/0x3f0 [ 29.290305] do_mmap+0x854/0xf00 [ 29.290576] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.290873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.291202] ksys_mmap_pgoff+0x3af/0x500 [ 29.291503] do_syscall_64+0x3f/0x90 [ 29.291786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.292172] RIP: 0033:0x7f5bb1db4d82 [ 29.292434] 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 [ 29.293709] RSP: 002b:00007ffea7087d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.294247] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5bb1db4d82 [ 29.294769] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5bb11ee000 [ 29.295280] RBP: 00007f5bb11ee000 R08: 0000000000000009 R09: 0000000000001000 [ 29.295792] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c36b1cec0 [ 29.296293] R13: 00007ffea7087d40 R14: 00007ffea7087d70 R15: 00007ffea70880d0 [ 29.296802] [ 29.296973] [ 29.297099] Allocated by task 213: [ 29.297358] kasan_save_stack+0x22/0x50 [ 29.297656] kasan_set_track+0x25/0x30 [ 29.297951] __kasan_slab_alloc+0x59/0x70 [ 29.298258] kmem_cache_alloc+0x16b/0x370 [ 29.298559] vm_area_dup+0x20/0x160 [ 29.298834] __split_vma+0x170/0x950 [ 29.299109] split_vma+0xc6/0x110 [ 29.299367] mprotect_fixup+0x8d2/0xb30 [ 29.299667] do_mprotect_pkey+0x87e/0xd40 [ 29.299972] __x64_sys_mprotect+0x78/0xc0 [ 29.300285] do_syscall_64+0x3f/0x90 [ 29.300562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.300935] [ 29.301062] Freed by task 213: [ 29.301295] kasan_save_stack+0x22/0x50 [ 29.301592] kasan_set_track+0x25/0x30 [ 29.301886] kasan_save_free_info+0x2b/0x50 [ 29.302197] __kasan_slab_free+0x10a/0x190 [ 29.302511] kmem_cache_free+0x10d/0x4d0 [ 29.302809] rcu_core+0x8c8/0x2860 [ 29.303074] __do_softirq+0x1b7/0x7d4 [ 29.303355] [ 29.303478] Last potentially related work creation: [ 29.303831] kasan_save_stack+0x22/0x50 [ 29.304127] __kasan_record_aux_stack+0x8e/0xa0 [ 29.304465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.304847] remove_vma+0x139/0x170 [ 29.305112] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.305439] do_vmi_munmap+0x1f1/0x2b0 [ 29.305724] __vm_munmap+0x138/0x3a0 [ 29.306009] __x64_sys_munmap+0x59/0x80 [ 29.306302] do_syscall_64+0x3f/0x90 [ 29.306593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.306963] [ 29.307094] The buggy address belongs to the object at ffff888017d81828 [ 29.307094] which belongs to the cache vm_area_struct of size 168 [ 29.307970] The buggy address is located 88 bytes inside of [ 29.307970] freed 168-byte region [ffff888017d81828, ffff888017d818d0) [ 29.308807] [ 29.308932] The buggy address belongs to the physical page: [ 29.309325] page:00000000b5b8962c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d81 [ 29.309981] memcg:ffff88800ec2d701 [ 29.310231] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.310611] page_type: 0xffffffff() [ 29.310871] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.311410] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec2d701 [ 29.311948] page dumped because: kasan: bad access detected [ 29.312342] [ 29.312470] Memory state around the buggy address: [ 29.312808] ffff888017d81780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.313317] ffff888017d81800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.313827] >ffff888017d81880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.314337] ^ [ 29.314590] ffff888017d81900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.315108] ffff888017d81980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.315617] ================================================================== [ 29.316202] Disabling lock debugging due to kernel taint [ 31.269363] BUG: Bad rss-counter state mm:00000000df5a77a7 type:MM_FILEPAGES val:33 [ 31.270098] BUG: Bad rss-counter state mm:00000000df5a77a7 type:MM_ANONPAGES val:22 [ 31.656431] BUG: Bad rss-counter state mm:000000002bc821dd type:MM_FILEPAGES val:33 [ 31.657195] BUG: Bad rss-counter state mm:000000002bc821dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13086' (ECDSA) to the list of known hosts. 2023/06/19 15:58:39 fuzzer started 2023/06/19 15:58:40 dialing manager at localhost:44161 2023/06/19 15:58:40 checking machine... 2023/06/19 15:58:40 checking revisions... [ 32.300686] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:58:40 testing simple program... [ 32.357347] cgroup: Unknown subsys name 'net' [ 32.411739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:58:39 Registers: info registers vcpu 0 RAX=1ffff110012c0eaa RBX=000000000000000e RCX=0000000000000001 RDX=0000000000092cc0 RSI=0000000000000011 RDI=ffff888009607550 RBP=dffffc0000000000 RSP=ffff888009607450 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000011 R13=0000000000092cc0 R14=ffff8880096074e0 R15=0000000000092cc0 RIP=ffffffff813ad5ca 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 00007f07af81c900 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=00007fff2bf96000 CR3=000000000e8a2000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=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=00007f235563b020 CR3=00000000142ec000 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=2039333a38353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a38353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000