syzkaller login: [ 31.994347] BUG: Bad rss-counter state mm:00000000c5e59179 type:MM_FILEPAGES val:33 [ 31.996066] BUG: Bad rss-counter state mm:00000000c5e59179 type:MM_ANONPAGES val:22 [ 32.156015] ================================================================== [ 32.156997] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.158029] Read of size 8 at addr ffff88800dc44d08 by task sshd/221 [ 32.158918] [ 32.159157] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.160144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.161225] Call Trace: [ 32.161574] [ 32.161888] dump_stack_lvl+0x91/0xf0 [ 32.162437] print_report+0xcc/0x620 [ 32.162978] ? __virt_addr_valid+0x102/0x340 [ 32.163597] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.164285] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.164955] kasan_report+0xbe/0xf0 [ 32.165489] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.166156] vma_interval_tree_remove+0xc75/0xec0 [ 32.166800] vma_prepare+0xc54/0x11a0 [ 32.167310] __split_vma+0x5af/0x950 [ 32.167847] ? __pfx___split_vma+0x10/0x10 [ 32.168429] ? find_held_lock+0x2c/0x110 [ 32.169002] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.169634] ? lock_is_held_type+0x9f/0x120 [ 32.170238] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.170913] ? mtree_range_walk+0x632/0x900 [ 32.171527] ? mas_walk+0x5c7/0x7c0 [ 32.172055] do_vmi_munmap+0x1f1/0x2b0 [ 32.172601] mmap_region+0x1f9/0x2660 [ 32.173135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.173707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.174487] ? __pfx_lock_acquire+0x10/0x10 [ 32.175076] ? __pfx_mmap_region+0x10/0x10 [ 32.175682] ? security_mmap_addr+0x7d/0xa0 [ 32.176261] ? get_unmapped_area+0x1f5/0x3f0 [ 32.176865] do_mmap+0x854/0xf00 [ 32.177339] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.177874] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.178488] ksys_mmap_pgoff+0x3af/0x500 [ 32.179064] do_syscall_64+0x3f/0x90 [ 32.179602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.180317] RIP: 0033:0x7f33673e6d82 [ 32.180808] 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 [ 32.183124] RSP: 002b:00007ffdb32bca98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.184134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33673e6d82 [ 32.185056] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3366820000 [ 32.185981] RBP: 00007f3366820000 R08: 0000000000000009 R09: 0000000000001000 [ 32.186930] R10: 0000000000000812 R11: 0000000000000206 R12: 000055caea5a5f70 [ 32.187875] R13: 00007ffdb32bcab0 R14: 00007ffdb32bcae0 R15: 00007ffdb32bce40 [ 32.188803] [ 32.189120] [ 32.189353] Allocated by task 214: [ 32.189809] kasan_save_stack+0x22/0x50 [ 32.190365] kasan_set_track+0x25/0x30 [ 32.190905] __kasan_slab_alloc+0x59/0x70 [ 32.191489] kmem_cache_alloc+0x16b/0x370 [ 32.192067] vm_area_dup+0x20/0x160 [ 32.192560] __split_vma+0x170/0x950 [ 32.193062] split_vma+0xc6/0x110 [ 32.193540] mprotect_fixup+0x8d2/0xb30 [ 32.194088] do_mprotect_pkey+0x87e/0xd40 [ 32.194644] __x64_sys_mprotect+0x78/0xc0 [ 32.195199] do_syscall_64+0x3f/0x90 [ 32.195737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.196452] [ 32.196688] Freed by task 19: [ 32.197104] kasan_save_stack+0x22/0x50 [ 32.197653] kasan_set_track+0x25/0x30 [ 32.198183] kasan_save_free_info+0x2b/0x50 [ 32.198759] __kasan_slab_free+0x10a/0x190 [ 32.199324] kmem_cache_free+0x10d/0x4d0 [ 32.199885] rcu_core+0x8c8/0x2860 [ 32.200360] __do_softirq+0x1b7/0x7d4 [ 32.200870] [ 32.201099] Last potentially related work creation: [ 32.201734] kasan_save_stack+0x22/0x50 [ 32.202293] __kasan_record_aux_stack+0x8e/0xa0 [ 32.202904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.203613] remove_vma+0x139/0x170 [ 32.204099] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.204694] do_vmi_munmap+0x1f1/0x2b0 [ 32.205214] __vm_munmap+0x138/0x3a0 [ 32.205720] __x64_sys_munmap+0x59/0x80 [ 32.206259] do_syscall_64+0x3f/0x90 [ 32.206768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.207466] [ 32.207708] Second to last potentially related work creation: [ 32.208443] kasan_save_stack+0x22/0x50 [ 32.208995] __kasan_record_aux_stack+0x8e/0xa0 [ 32.209628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.210318] remove_vma+0x139/0x170 [ 32.210798] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.211399] do_vmi_munmap+0x1f1/0x2b0 [ 32.211948] __vm_munmap+0x138/0x3a0 [ 32.212449] __x64_sys_munmap+0x59/0x80 [ 32.212977] do_syscall_64+0x3f/0x90 [ 32.213487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.214185] [ 32.214417] The buggy address belongs to the object at ffff88800dc44cb0 [ 32.214417] which belongs to the cache vm_area_struct of size 168 [ 32.216016] The buggy address is located 88 bytes inside of [ 32.216016] freed 168-byte region [ffff88800dc44cb0, ffff88800dc44d58) [ 32.217522] [ 32.217758] The buggy address belongs to the physical page: [ 32.218501] page:00000000ef3aea30 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc44 [ 32.219683] memcg:ffff88800ddc8501 [ 32.220141] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.220885] page_type: 0xffffffff() [ 32.221366] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.222362] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddc8501 [ 32.223338] page dumped because: kasan: bad access detected [ 32.224052] [ 32.224289] Memory state around the buggy address: [ 32.224911] ffff88800dc44c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.225820] ffff88800dc44c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.226729] >ffff88800dc44d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.227651] ^ [ 32.228120] ffff88800dc44d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.229035] ffff88800dc44e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.229934] ================================================================== [ 32.231129] Disabling lock debugging due to kernel taint [ 34.417019] BUG: Bad rss-counter state mm:00000000c4d3885d type:MM_FILEPAGES val:33 [ 34.418087] BUG: Bad rss-counter state mm:00000000c4d3885d type:MM_ANONPAGES val:22 [ 34.900577] BUG: Bad rss-counter state mm:00000000909261e5 type:MM_FILEPAGES val:33 [ 34.901666] BUG: Bad rss-counter state mm:00000000909261e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53372' (ECDSA) to the list of known hosts. 2023/06/20 02:14:28 fuzzer started 2023/06/20 02:14:28 dialing manager at localhost:44161 2023/06/20 02:14:28 checking machine... 2023/06/20 02:14:28 checking revisions... [ 35.624698] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:14:28 testing simple program... [ 35.673677] cgroup: Unknown subsys name 'net' [ 35.740988] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:14:26 Registers: info registers vcpu 0 RAX=0000000000000006 RBX=0000555c6571cd60 RCX=0000000000000006 RDX=0000000000000003 RSI=0000555c657235f0 RDI=0000000000000002 RBP=0000000000000006 RSP=00007ffcb0c5dd80 R8 =0000000000000000 R9 =00000000000bc450 R10=0000000000000002 R11=00007f46535d4268 R12=0000555c657235f0 R13=0000000000000006 R14=00000000000bc450 R15=0000000000000000 RIP=00007f4654c45645 RFL=00000293 [--S-A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f46540b3900 00000000 00000000 GS =0000 0000000000000000 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=00007f46534ba1a0 CR3=000000000cb3c000 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=000000000010d8f82fccd54c36d8a3f3 XMM01=fd13feea5f4be8ac6b48be3f8d3d95c0 XMM02=000000000011fce0eff9b2d0a8fce9cb XMM03=000000000011fdb02c67c8bc2e329bc3 XMM04=f19855881a8ef9ae00000000000ae988 XMM05=fe2c5cd2280e823b0000000000136140 XMM06=e4cb8bb95a7664b60000000000134fd8 XMM07=fb795ef6d657705600000000001243e0 XMM08=2c67c8bc2e329bc3000000000011fd50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016dc8000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88801a386140 RSP=ffff88801692fae0 R8 =0000000000000006 R9 =ffffc90000000000 R10=ffff88800e80a700 R11=656d616e74736f68 R12=0000000000000cc0 R13=0000000000000140 R14=00000000000000f4 R15=ffff88801a386140 RIP=ffffffff814c0324 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 00007f4594978900 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=00007ffc437ab000 CR3=000000000fdfe000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000