syzkaller login: [ 41.873900] BUG: Bad rss-counter state mm:00000000198e5730 type:MM_FILEPAGES val:33 [ 41.875082] BUG: Bad rss-counter state mm:00000000198e5730 type:MM_ANONPAGES val:22 [ 41.914543] ================================================================== [ 41.915613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.916708] Read of size 8 at addr ffff88800e76edf0 by task sshd/220 [ 41.917678] [ 41.917907] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.918959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.920100] Call Trace: [ 41.920471] [ 41.920799] dump_stack_lvl+0x91/0xf0 [ 41.921350] print_report+0xcc/0x620 [ 41.921867] ? __virt_addr_valid+0x102/0x340 [ 41.922501] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.923199] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.923869] kasan_report+0xbe/0xf0 [ 41.924381] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.925052] vma_interval_tree_remove+0xc75/0xec0 [ 41.925702] vma_prepare+0xc54/0x11a0 [ 41.926218] __split_vma+0x5af/0x950 [ 41.926725] ? __pfx___split_vma+0x10/0x10 [ 41.927288] ? find_held_lock+0x2c/0x110 [ 41.927864] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.928467] ? lock_is_held_type+0x9f/0x120 [ 41.929036] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.929686] ? mtree_range_walk+0x632/0x900 [ 41.930277] ? mas_walk+0x5c7/0x7c0 [ 41.930783] do_vmi_munmap+0x1f1/0x2b0 [ 41.931308] mmap_region+0x1f9/0x2660 [ 41.931826] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.932371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.933137] ? __pfx_lock_acquire+0x10/0x10 [ 41.933714] ? __pfx_mmap_region+0x10/0x10 [ 41.934290] ? security_mmap_addr+0x7d/0xa0 [ 41.934860] ? get_unmapped_area+0x1f5/0x3f0 [ 41.935464] do_mmap+0x854/0xf00 [ 41.935938] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.936473] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.937068] ksys_mmap_pgoff+0x3af/0x500 [ 41.937615] do_syscall_64+0x3f/0x90 [ 41.938129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.938819] RIP: 0033:0x7fc68d066d82 [ 41.939302] 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 [ 41.941560] RSP: 002b:00007ffc7eaa3008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.942528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc68d066d82 [ 41.943450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc68c4a0000 [ 41.944356] RBP: 00007fc68c4a0000 R08: 0000000000000009 R09: 0000000000001000 [ 41.945263] R10: 0000000000000812 R11: 0000000000000206 R12: 000056308867dd90 [ 41.946166] R13: 00007ffc7eaa3020 R14: 00007ffc7eaa3050 R15: 00007ffc7eaa33b0 [ 41.947101] [ 41.947418] [ 41.947658] Allocated by task 212: [ 41.948119] kasan_save_stack+0x22/0x50 [ 41.948665] kasan_set_track+0x25/0x30 [ 41.949198] __kasan_slab_alloc+0x59/0x70 [ 41.949759] kmem_cache_alloc+0x16b/0x370 [ 41.950309] vm_area_dup+0x20/0x160 [ 41.950795] __split_vma+0x170/0x950 [ 41.951295] split_vma+0xc6/0x110 [ 41.951769] mprotect_fixup+0x8d2/0xb30 [ 41.952313] do_mprotect_pkey+0x87e/0xd40 [ 41.952873] __x64_sys_mprotect+0x78/0xc0 [ 41.953426] do_syscall_64+0x3f/0x90 [ 41.953936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.954628] [ 41.954858] Freed by task 212: [ 41.955278] kasan_save_stack+0x22/0x50 [ 41.955838] kasan_set_track+0x25/0x30 [ 41.956369] kasan_save_free_info+0x2b/0x50 [ 41.956934] __kasan_slab_free+0x10a/0x190 [ 41.957505] kmem_cache_free+0x10d/0x4d0 [ 41.958045] rcu_core+0x8c8/0x2860 [ 41.958524] __do_softirq+0x1b7/0x7d4 [ 41.959125] [ 41.959358] Last potentially related work creation: [ 41.959998] kasan_save_stack+0x22/0x50 [ 41.960534] __kasan_record_aux_stack+0x8e/0xa0 [ 41.961151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.961845] remove_vma+0x139/0x170 [ 41.962334] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.962930] do_vmi_munmap+0x1f1/0x2b0 [ 41.963468] __vm_munmap+0x138/0x3a0 [ 41.963962] __x64_sys_munmap+0x59/0x80 [ 41.964493] do_syscall_64+0x3f/0x90 [ 41.964996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.965686] [ 41.965915] Second to last potentially related work creation: [ 41.966644] kasan_save_stack+0x22/0x50 [ 41.967189] __kasan_record_aux_stack+0x8e/0xa0 [ 41.967805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.968487] remove_vma+0x139/0x170 [ 41.968974] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.969575] do_vmi_munmap+0x1f1/0x2b0 [ 41.970099] mmap_region+0x1f9/0x2660 [ 41.970615] do_mmap+0x854/0xf00 [ 41.971081] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.971618] ksys_mmap_pgoff+0x3af/0x500 [ 41.972161] do_syscall_64+0x3f/0x90 [ 41.972673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.973365] [ 41.973596] The buggy address belongs to the object at ffff88800e76ed98 [ 41.973596] which belongs to the cache vm_area_struct of size 168 [ 41.975156] The buggy address is located 88 bytes inside of [ 41.975156] freed 168-byte region [ffff88800e76ed98, ffff88800e76ee40) [ 41.976659] [ 41.976890] The buggy address belongs to the physical page: [ 41.977583] page:00000000b4f8bde1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe76e [ 41.978727] memcg:ffff88800e659f01 [ 41.979177] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.979863] page_type: 0xffffffff() [ 41.980336] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 41.981314] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e659f01 [ 41.982270] page dumped because: kasan: bad access detected [ 41.982975] [ 41.983201] Memory state around the buggy address: [ 41.983843] ffff88800e76ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.984747] ffff88800e76ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.985676] >ffff88800e76ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.986586] ^ [ 41.987456] ffff88800e76ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.988376] ffff88800e76ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.989288] ================================================================== [ 41.990289] Disabling lock debugging due to kernel taint [ 43.859556] BUG: Bad rss-counter state mm:000000008e753ae7 type:MM_FILEPAGES val:33 [ 43.860576] BUG: Bad rss-counter state mm:000000008e753ae7 type:MM_ANONPAGES val:22 [ 44.420548] BUG: Bad rss-counter state mm:000000005dd16117 type:MM_FILEPAGES val:33 [ 44.421740] BUG: Bad rss-counter state mm:000000005dd16117 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56576' (ECDSA) to the list of known hosts. 2023/06/19 16:14:51 fuzzer started 2023/06/19 16:14:51 dialing manager at localhost:44161 2023/06/19 16:14:52 checking machine... 2023/06/19 16:14:52 checking revisions... [ 45.155424] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:14:52 testing simple program... [ 45.211228] cgroup: Unknown subsys name 'net' [ 45.251844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:14:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000003 RSI=0000000000000010 RDI=ffff888019b2d640 RBP=0000000000000010 RSP=ffff888019e3fe18 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000003 R13=0000000000000000 R14=ffff888019b2d640 R15=00000000ffffff9f RIP=ffffffff81ef5694 RFL=00000293 [--S-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 00007f9dca4c9900 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=00007f9dcaa80618 CR3=0000000016f2c000 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=2031353a34313a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a34313a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8153447a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450c0f0 RSP=ffff888008e27d90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534482 RFL=00000047 [---Z-PC] 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=000055f1d92eccc0 CR3=0000000009786000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000010000000000000000 XMM04=00000000000000000000000000000017 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=0000000000000031000055f1d92df540 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000