syzkaller login: [ 31.006255] BUG: Bad rss-counter state mm:000000007364be26 type:MM_FILEPAGES val:33 [ 31.007902] BUG: Bad rss-counter state mm:000000007364be26 type:MM_ANONPAGES val:22 [ 31.182915] ================================================================== [ 31.184026] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.185321] Read of size 8 at addr ffff88800e5303f8 by task sshd/221 [ 31.186247] [ 31.186544] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.187570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.188577] Call Trace: [ 31.188904] [ 31.189187] dump_stack_lvl+0x91/0xf0 [ 31.189697] print_report+0xcc/0x620 [ 31.190188] ? __virt_addr_valid+0x102/0x340 [ 31.190772] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.191395] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192025] kasan_report+0xbe/0xf0 [ 31.192512] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193136] vma_interval_tree_remove+0xc75/0xec0 [ 31.193746] vma_prepare+0xc54/0x11a0 [ 31.194225] __split_vma+0x5af/0x950 [ 31.194714] ? __pfx___split_vma+0x10/0x10 [ 31.195246] ? find_held_lock+0x2c/0x110 [ 31.195771] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.196341] ? lock_is_held_type+0x9f/0x120 [ 31.196882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.197487] ? mtree_range_walk+0x632/0x900 [ 31.198049] ? mas_walk+0x5c7/0x7c0 [ 31.198546] do_vmi_munmap+0x1f1/0x2b0 [ 31.199039] mmap_region+0x1f9/0x2660 [ 31.199526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.200044] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.200754] ? __pfx_lock_acquire+0x10/0x10 [ 31.201290] ? __pfx_mmap_region+0x10/0x10 [ 31.201820] ? security_mmap_addr+0x7d/0xa0 [ 31.202359] ? get_unmapped_area+0x1f5/0x3f0 [ 31.202936] do_mmap+0x854/0xf00 [ 31.203377] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.203877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.204453] ksys_mmap_pgoff+0x3af/0x500 [ 31.204967] do_syscall_64+0x3f/0x90 [ 31.205451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206100] RIP: 0033:0x7fe9df028d82 [ 31.206565] 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 [ 31.208685] RSP: 002b:00007ffe3dcd0158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.209596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe9df028d82 [ 31.210478] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe9de462000 [ 31.211340] RBP: 00007fe9de462000 R08: 0000000000000009 R09: 0000000000001000 [ 31.212206] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561aeb655d90 [ 31.213071] R13: 00007ffe3dcd0170 R14: 00007ffe3dcd01a0 R15: 00007ffe3dcd0500 [ 31.213951] [ 31.214246] [ 31.214476] Allocated by task 214: [ 31.214918] kasan_save_stack+0x22/0x50 [ 31.215432] kasan_set_track+0x25/0x30 [ 31.215935] __kasan_slab_alloc+0x59/0x70 [ 31.216470] kmem_cache_alloc+0x16b/0x370 [ 31.216984] vm_area_dup+0x20/0x160 [ 31.217439] __split_vma+0x170/0x950 [ 31.217921] split_vma+0xc6/0x110 [ 31.218365] mprotect_fixup+0x8d2/0xb30 [ 31.218883] do_mprotect_pkey+0x87e/0xd40 [ 31.219412] __x64_sys_mprotect+0x78/0xc0 [ 31.219935] do_syscall_64+0x3f/0x90 [ 31.220424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.221079] [ 31.221296] Freed by task 214: [ 31.221689] kasan_save_stack+0x22/0x50 [ 31.222198] kasan_set_track+0x25/0x30 [ 31.222712] kasan_save_free_info+0x2b/0x50 [ 31.223251] __kasan_slab_free+0x10a/0x190 [ 31.223785] kmem_cache_free+0x10d/0x4d0 [ 31.224300] rcu_core+0x8c8/0x2860 [ 31.224750] __do_softirq+0x1b7/0x7d4 [ 31.225226] [ 31.225443] Last potentially related work creation: [ 31.226036] kasan_save_stack+0x22/0x50 [ 31.226552] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227132] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.227776] remove_vma+0x139/0x170 [ 31.228231] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.228790] do_vmi_munmap+0x1f1/0x2b0 [ 31.229280] __vm_munmap+0x138/0x3a0 [ 31.229751] __x64_sys_munmap+0x59/0x80 [ 31.230250] do_syscall_64+0x3f/0x90 [ 31.230752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231395] [ 31.231613] Second to last potentially related work creation: [ 31.232301] kasan_save_stack+0x22/0x50 [ 31.232812] __kasan_record_aux_stack+0x8e/0xa0 [ 31.233390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.234053] remove_vma+0x139/0x170 [ 31.234514] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.235082] do_vmi_munmap+0x1f1/0x2b0 [ 31.235572] mmap_region+0x1f9/0x2660 [ 31.236058] do_mmap+0x854/0xf00 [ 31.236502] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.237009] ksys_mmap_pgoff+0x3af/0x500 [ 31.237522] do_syscall_64+0x3f/0x90 [ 31.238011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238692] [ 31.238913] The buggy address belongs to the object at ffff88800e5303a0 [ 31.238913] which belongs to the cache vm_area_struct of size 168 [ 31.240405] The buggy address is located 88 bytes inside of [ 31.240405] freed 168-byte region [ffff88800e5303a0, ffff88800e530448) [ 31.241835] [ 31.242053] The buggy address belongs to the physical page: [ 31.242739] page:00000000f0feced1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe530 [ 31.243813] memcg:ffff88800fedd801 [ 31.244236] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.244884] page_type: 0xffffffff() [ 31.245336] raw: 0100000000000200 ffff8880087a0c80 ffffea0000363300 0000000000000006 [ 31.246261] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fedd801 [ 31.247174] page dumped because: kasan: bad access detected [ 31.247834] [ 31.248052] Memory state around the buggy address: [ 31.248628] ffff88800e530280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.249485] ffff88800e530300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.250353] >ffff88800e530380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.251360] ^ [ 31.252384] ffff88800e530400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.253441] ffff88800e530480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.254483] ================================================================== [ 31.255885] Disabling lock debugging due to kernel taint [ 33.163914] BUG: Bad rss-counter state mm:00000000a6563b29 type:MM_FILEPAGES val:33 [ 33.165237] BUG: Bad rss-counter state mm:00000000a6563b29 type:MM_ANONPAGES val:22 [ 33.633113] BUG: Bad rss-counter state mm:000000000365e74a type:MM_FILEPAGES val:33 [ 33.634100] BUG: Bad rss-counter state mm:000000000365e74a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64232' (ECDSA) to the list of known hosts. 2023/06/21 00:45:55 fuzzer started 2023/06/21 00:45:55 dialing manager at localhost:36067 2023/06/21 00:45:55 checking machine... 2023/06/21 00:45:55 checking revisions... [ 34.382452] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:45:56 testing simple program... [ 34.434943] cgroup: Unknown subsys name 'net' [ 34.470721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:45:55 Registers: info registers vcpu 0 RAX=ffff88800e82e500 RBX=dffffc0000000000 RCX=ffff88800e82e500 RDX=1ffff11001d05cd8 RSI=ffffffff816218c3 RDI=ffff88800e82e6c0 RBP=ffff888016cd7e20 RSP=ffff888016cd7ad0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff8880192f84d8 R14=ffff888016cd7db0 R15=0000000000000ab9 RIP=ffffffff81621941 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 00007f43bd1a3700 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=00007fc9c7c286f0 CR3=0000000016064000 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=2035353a35343a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a35343a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff8880159748a0 RCX=0000000000000000 RDX=1ffff11003258a2f RSI=ffffffff81f04fa6 RDI=ffff8880192c5178 RBP=ffff8880192c5140 RSP=ffff88800abefbf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880192c5140 R13=ffff8880192c52e8 R14=ffff8880192c51c8 R15=ffff8880192c5218 RIP=ffffffff814c086b RFL=00000286 [--S--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 00007fa9e9894900 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=00007ffcd0dae000 CR3=000000001a1e8000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000