syzkaller login: [ 40.972188] BUG: Bad rss-counter state mm:0000000070f87f22 type:MM_FILEPAGES val:33 [ 40.973931] BUG: Bad rss-counter state mm:0000000070f87f22 type:MM_ANONPAGES val:22 [ 41.144177] ================================================================== [ 41.145123] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.146052] Read of size 8 at addr ffff888019cd1310 by task sshd/220 [ 41.146995] [ 41.147212] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.148089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.149086] Call Trace: [ 41.149402] [ 41.149693] dump_stack_lvl+0x91/0xf0 [ 41.150186] print_report+0xcc/0x620 [ 41.150679] ? __virt_addr_valid+0x102/0x340 [ 41.151233] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.151846] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.152487] kasan_report+0xbe/0xf0 [ 41.153016] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.153621] vma_interval_tree_remove+0xc75/0xec0 [ 41.154213] vma_prepare+0xc54/0x11a0 [ 41.154688] __split_vma+0x5af/0x950 [ 41.155156] ? __pfx___split_vma+0x10/0x10 [ 41.155679] ? find_held_lock+0x2c/0x110 [ 41.156215] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.156769] ? lock_is_held_type+0x9f/0x120 [ 41.157305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.157899] ? mtree_range_walk+0x632/0x900 [ 41.158438] ? mas_walk+0x5c7/0x7c0 [ 41.158907] do_vmi_munmap+0x1f1/0x2b0 [ 41.159390] mmap_region+0x1f9/0x2660 [ 41.159874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.160379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.161079] ? __pfx_lock_acquire+0x10/0x10 [ 41.161614] ? __pfx_mmap_region+0x10/0x10 [ 41.162140] ? security_mmap_addr+0x7d/0xa0 [ 41.162665] ? get_unmapped_area+0x1f5/0x3f0 [ 41.163201] do_mmap+0x854/0xf00 [ 41.163637] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.164143] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.164706] ksys_mmap_pgoff+0x3af/0x500 [ 41.165203] do_syscall_64+0x3f/0x90 [ 41.165671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.166312] RIP: 0033:0x7f0e5e412d82 [ 41.166760] 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 [ 41.168864] RSP: 002b:00007ffdc676cc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.169767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e5e412d82 [ 41.170604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e5d84c000 [ 41.171428] RBP: 00007f0e5d84c000 R08: 0000000000000009 R09: 0000000000001000 [ 41.172265] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598c7e4cec0 [ 41.173099] R13: 00007ffdc676cc80 R14: 00007ffdc676ccb0 R15: 00007ffdc676d010 [ 41.173949] [ 41.174238] [ 41.174451] Allocated by task 213: [ 41.174879] kasan_save_stack+0x22/0x50 [ 41.175378] kasan_set_track+0x25/0x30 [ 41.175882] __kasan_slab_alloc+0x59/0x70 [ 41.176400] kmem_cache_alloc+0x16b/0x370 [ 41.176922] vm_area_dup+0x20/0x160 [ 41.177373] __split_vma+0x170/0x950 [ 41.177832] split_vma+0xc6/0x110 [ 41.178272] mprotect_fixup+0x8d2/0xb30 [ 41.178764] do_mprotect_pkey+0x87e/0xd40 [ 41.179278] __x64_sys_mprotect+0x78/0xc0 [ 41.179792] do_syscall_64+0x3f/0x90 [ 41.180277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.180915] [ 41.181131] Freed by task 213: [ 41.181516] kasan_save_stack+0x22/0x50 [ 41.182010] kasan_set_track+0x25/0x30 [ 41.182498] kasan_save_free_info+0x2b/0x50 [ 41.183020] __kasan_slab_free+0x10a/0x190 [ 41.183548] kmem_cache_free+0x10d/0x4d0 [ 41.184066] rcu_core+0x8c8/0x2860 [ 41.184508] __do_softirq+0x1b7/0x7d4 [ 41.184979] [ 41.185193] Last potentially related work creation: [ 41.185772] kasan_save_stack+0x22/0x50 [ 41.186269] __kasan_record_aux_stack+0x8e/0xa0 [ 41.186841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.187485] remove_vma+0x139/0x170 [ 41.187941] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.188497] do_vmi_munmap+0x1f1/0x2b0 [ 41.188973] __vm_munmap+0x138/0x3a0 [ 41.189432] __x64_sys_munmap+0x59/0x80 [ 41.189927] do_syscall_64+0x3f/0x90 [ 41.190393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.191030] [ 41.191242] Second to last potentially related work creation: [ 41.191923] kasan_save_stack+0x22/0x50 [ 41.192416] __kasan_record_aux_stack+0x8e/0xa0 [ 41.192984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.193619] remove_vma+0x139/0x170 [ 41.194061] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.194611] do_vmi_munmap+0x1f1/0x2b0 [ 41.195090] mmap_region+0x1f9/0x2660 [ 41.195559] do_mmap+0x854/0xf00 [ 41.196005] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.196484] ksys_mmap_pgoff+0x3af/0x500 [ 41.196973] do_syscall_64+0x3f/0x90 [ 41.197446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.198072] [ 41.198284] The buggy address belongs to the object at ffff888019cd12b8 [ 41.198284] which belongs to the cache vm_area_struct of size 168 [ 41.199732] The buggy address is located 88 bytes inside of [ 41.199732] freed 168-byte region [ffff888019cd12b8, ffff888019cd1360) [ 41.201116] [ 41.201330] The buggy address belongs to the physical page: [ 41.201974] page:000000009784ff3e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cd1 [ 41.203058] memcg:ffff888019ec7201 [ 41.203481] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.204184] page_type: 0xffffffff() [ 41.204629] raw: 0100000000000200 ffff88800879fc80 ffffea0000673600 dead00000000000d [ 41.205527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ec7201 [ 41.206431] page dumped because: kasan: bad access detected [ 41.207077] [ 41.207291] Memory state around the buggy address: [ 41.207877] ffff888019cd1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.208722] ffff888019cd1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.209563] >ffff888019cd1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.210408] ^ [ 41.210871] ffff888019cd1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.211711] ffff888019cd1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.212561] ================================================================== [ 41.213642] Disabling lock debugging due to kernel taint [ 43.813984] BUG: Bad rss-counter state mm:00000000371e0282 type:MM_FILEPAGES val:33 [ 43.815014] BUG: Bad rss-counter state mm:00000000371e0282 type:MM_ANONPAGES val:22 [ 44.298154] BUG: Bad rss-counter state mm:00000000501b346b type:MM_FILEPAGES val:33 [ 44.299190] BUG: Bad rss-counter state mm:00000000501b346b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47265' (ECDSA) to the list of known hosts. 2023/06/20 00:38:30 fuzzer started 2023/06/20 00:38:30 dialing manager at localhost:44161 2023/06/20 00:38:30 checking machine... 2023/06/20 00:38:30 checking revisions... [ 44.983677] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:38:31 testing simple program... [ 45.031248] cgroup: Unknown subsys name 'net' [ 45.080390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:38:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce3a360 RCX=ffffffff81378ab5 RDX=1ffff1100d9c7475 RSI=000000000000009d RDI=ffff88806ce3a3a8 RBP=ffff88806ce35000 RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=fffffffffffffff6 R13=ffff88806ce09ee8 R14=ffff88806ce3a360 R15=0000000000000200 RIP=ffffffff8137fe9b RFL=00000082 [--S----] 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 00007fcce316b700 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=00007efd613f2be0 CR3=000000000f306000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32373233332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323732 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff110033d2f31 RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888019e97970 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 00007f69ce2f2900 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=00007ffe17e0a000 CR3=0000000016cc2000 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=2030333a38333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000