syzkaller login: [ 72.150847] BUG: Bad rss-counter state mm:00000000d266cfd4 type:MM_FILEPAGES val:33 [ 72.151873] BUG: Bad rss-counter state mm:00000000d266cfd4 type:MM_ANONPAGES val:22 [ 72.194849] ================================================================== [ 72.195984] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.196925] Read of size 8 at addr ffff88800f3a1c20 by task sshd/221 [ 72.197701] [ 72.197922] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 72.198960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.199982] Call Trace: [ 72.200304] [ 72.200594] dump_stack_lvl+0x91/0xf0 [ 72.201115] print_report+0xcc/0x620 [ 72.201595] ? __virt_addr_valid+0x102/0x340 [ 72.202154] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.202778] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.203406] kasan_report+0xbe/0xf0 [ 72.203898] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.204521] vma_interval_tree_remove+0xc75/0xec0 [ 72.205133] vma_prepare+0xc54/0x11a0 [ 72.205620] __split_vma+0x5af/0x950 [ 72.206119] ? __pfx___split_vma+0x10/0x10 [ 72.206671] ? find_held_lock+0x2c/0x110 [ 72.207209] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.207789] ? lock_is_held_type+0x9f/0x120 [ 72.208328] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.208952] ? mtree_range_walk+0x632/0x900 [ 72.209498] ? mas_walk+0x5c7/0x7c0 [ 72.209985] do_vmi_munmap+0x1f1/0x2b0 [ 72.210480] mmap_region+0x1f9/0x2660 [ 72.210987] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.211524] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.212245] ? __pfx_lock_acquire+0x10/0x10 [ 72.212784] ? __pfx_mmap_region+0x10/0x10 [ 72.213315] ? security_mmap_addr+0x7d/0xa0 [ 72.213858] ? get_unmapped_area+0x1f5/0x3f0 [ 72.214414] do_mmap+0x854/0xf00 [ 72.214869] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.215386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.216056] ksys_mmap_pgoff+0x3af/0x500 [ 72.216566] do_syscall_64+0x3f/0x90 [ 72.217057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.217721] RIP: 0033:0x7f549ee73d82 [ 72.218186] 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 [ 72.220506] RSP: 002b:00007ffd1538f6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.221453] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f549ee73d82 [ 72.222299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f549e2ad000 [ 72.223172] RBP: 00007f549e2ad000 R08: 0000000000000009 R09: 0000000000001000 [ 72.224024] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605ba7ecec0 [ 72.224875] R13: 00007ffd1538f6d0 R14: 00007ffd1538f700 R15: 00007ffd1538fa60 [ 72.225749] [ 72.226039] [ 72.226254] Allocated by task 214: [ 72.226691] kasan_save_stack+0x22/0x50 [ 72.227200] kasan_set_track+0x25/0x30 [ 72.227702] __kasan_slab_alloc+0x59/0x70 [ 72.228222] kmem_cache_alloc+0x16b/0x370 [ 72.228758] vm_area_dup+0x20/0x160 [ 72.229204] __split_vma+0x170/0x950 [ 72.229683] split_vma+0xc6/0x110 [ 72.230131] mprotect_fixup+0x8d2/0xb30 [ 72.230646] do_mprotect_pkey+0x87e/0xd40 [ 72.231190] __x64_sys_mprotect+0x78/0xc0 [ 72.231720] do_syscall_64+0x3f/0x90 [ 72.232194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.232851] [ 72.233064] Freed by task 214: [ 72.233451] kasan_save_stack+0x22/0x50 [ 72.233964] kasan_set_track+0x25/0x30 [ 72.234454] kasan_save_free_info+0x2b/0x50 [ 72.234996] __kasan_slab_free+0x10a/0x190 [ 72.235546] kmem_cache_free+0x10d/0x4d0 [ 72.236085] rcu_core+0x8c8/0x2860 [ 72.236528] __do_softirq+0x1b7/0x7d4 [ 72.237020] [ 72.237239] Last potentially related work creation: [ 72.237832] kasan_save_stack+0x22/0x50 [ 72.238337] __kasan_record_aux_stack+0x8e/0xa0 [ 72.238916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.239571] remove_vma+0x139/0x170 [ 72.240034] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.240586] do_vmi_munmap+0x1f1/0x2b0 [ 72.241094] __vm_munmap+0x138/0x3a0 [ 72.241559] __x64_sys_munmap+0x59/0x80 [ 72.242065] do_syscall_64+0x3f/0x90 [ 72.242537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.243196] [ 72.243412] The buggy address belongs to the object at ffff88800f3a1bc8 [ 72.243412] which belongs to the cache vm_area_struct of size 168 [ 72.244887] The buggy address is located 88 bytes inside of [ 72.244887] freed 168-byte region [ffff88800f3a1bc8, ffff88800f3a1c70) [ 72.246315] [ 72.246532] The buggy address belongs to the physical page: [ 72.247205] page:000000004907ef31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf3a1 [ 72.248297] memcg:ffff88800ee9a501 [ 72.248737] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.249373] page_type: 0xffffffff() [ 72.249839] raw: 0100000000000200 ffff88800879fc80 ffffea0000334940 dead000000000002 [ 72.250777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee9a501 [ 72.251716] page dumped because: kasan: bad access detected [ 72.252370] [ 72.252584] Memory state around the buggy address: [ 72.253164] ffff88800f3a1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.254037] ffff88800f3a1b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 72.254891] >ffff88800f3a1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 72.255772] ^ [ 72.256297] ffff88800f3a1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 72.257164] ffff88800f3a1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 72.258025] ================================================================== [ 72.259136] Disabling lock debugging due to kernel taint [ 74.130644] BUG: Bad rss-counter state mm:00000000c02241b0 type:MM_FILEPAGES val:33 [ 74.131810] BUG: Bad rss-counter state mm:00000000c02241b0 type:MM_ANONPAGES val:22 [ 74.604917] BUG: Bad rss-counter state mm:00000000c2b2e2fc type:MM_FILEPAGES val:33 [ 74.606500] BUG: Bad rss-counter state mm:00000000c2b2e2fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54028' (ECDSA) to the list of known hosts. 2023/06/19 20:02:16 fuzzer started 2023/06/19 20:02:17 dialing manager at localhost:44161 2023/06/19 20:02:17 checking machine... 2023/06/19 20:02:17 checking revisions... [ 75.425752] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:02:17 testing simple program... [ 75.475505] cgroup: Unknown subsys name 'net' [ 75.528732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff110033acfac RCX=0000000000000000 RDX=1ffff1100199b0d8 RSI=ffffffff81717ccc RDI=ffff88800ccd86c0 RBP=ffff888014332570 RSP=ffff888019d67d40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007fc8f1661968 R13=0000000000000cc0 R14=0000000000000255 R15=ffff88800ccd8500 RIP=ffffffff81717ce8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc8f0abf900 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=00007fc8f1661968 CR3=000000001c828000 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=00007f902c164790 CR3=0000000016656000 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=2036313a32303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a32303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000