syzkaller login: [ 31.024853] BUG: Bad rss-counter state mm:000000001f890aac type:MM_FILEPAGES val:33 [ 31.025865] BUG: Bad rss-counter state mm:000000001f890aac type:MM_ANONPAGES val:22 [ 31.193039] ================================================================== [ 31.193946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.194887] Read of size 8 at addr ffff88800f11d058 by task sshd/221 [ 31.195663] [ 31.195880] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.196886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.197855] Call Trace: [ 31.198177] [ 31.198580] dump_stack_lvl+0x91/0xf0 [ 31.199184] print_report+0xcc/0x620 [ 31.199755] ? __virt_addr_valid+0x102/0x340 [ 31.200402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201857] kasan_report+0xbe/0xf0 [ 31.202422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.203185] vma_interval_tree_remove+0xc75/0xec0 [ 31.203916] vma_prepare+0xc54/0x11a0 [ 31.204494] __split_vma+0x5af/0x950 [ 31.205059] ? __pfx___split_vma+0x10/0x10 [ 31.205702] ? find_held_lock+0x2c/0x110 [ 31.206329] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.207040] ? lock_is_held_type+0x9f/0x120 [ 31.207688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.208291] ? mtree_range_walk+0x632/0x900 [ 31.208831] ? mas_walk+0x5c7/0x7c0 [ 31.209301] do_vmi_munmap+0x1f1/0x2b0 [ 31.209787] mmap_region+0x1f9/0x2660 [ 31.210267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.210778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.211475] ? __pfx_lock_acquire+0x10/0x10 [ 31.211998] ? __pfx_mmap_region+0x10/0x10 [ 31.212516] ? security_mmap_addr+0x7d/0xa0 [ 31.213038] ? get_unmapped_area+0x1f5/0x3f0 [ 31.213578] do_mmap+0x854/0xf00 [ 31.214014] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.214502] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.215073] ksys_mmap_pgoff+0x3af/0x500 [ 31.215573] do_syscall_64+0x3f/0x90 [ 31.216055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216694] RIP: 0033:0x7f3e65776d82 [ 31.217146] 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 [ 31.219263] RSP: 002b:00007ffe63fe9d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.220152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e65776d82 [ 31.220999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e64bb0000 [ 31.221838] RBP: 00007f3e64bb0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.222683] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573c3f7db20 [ 31.223519] R13: 00007ffe63fe9db0 R14: 00007ffe63fe9de0 R15: 00007ffe63fea140 [ 31.224371] [ 31.224659] [ 31.224870] Allocated by task 214: [ 31.225297] kasan_save_stack+0x22/0x50 [ 31.225792] kasan_set_track+0x25/0x30 [ 31.226278] __kasan_slab_alloc+0x59/0x70 [ 31.226819] kmem_cache_alloc+0x16b/0x370 [ 31.227330] vm_area_dup+0x20/0x160 [ 31.227775] __split_vma+0x170/0x950 [ 31.228232] split_vma+0xc6/0x110 [ 31.228668] mprotect_fixup+0x8d2/0xb30 [ 31.229161] do_mprotect_pkey+0x87e/0xd40 [ 31.229675] __x64_sys_mprotect+0x78/0xc0 [ 31.230192] do_syscall_64+0x3f/0x90 [ 31.230666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231296] [ 31.231507] Freed by task 204: [ 31.231891] kasan_save_stack+0x22/0x50 [ 31.232383] kasan_set_track+0x25/0x30 [ 31.232866] kasan_save_free_info+0x2b/0x50 [ 31.233386] __kasan_slab_free+0x10a/0x190 [ 31.233912] kmem_cache_free+0x10d/0x4d0 [ 31.234408] rcu_core+0x8c8/0x2860 [ 31.234853] __do_softirq+0x1b7/0x7d4 [ 31.235324] [ 31.235538] Last potentially related work creation: [ 31.236118] kasan_save_stack+0x22/0x50 [ 31.236616] __kasan_record_aux_stack+0x8e/0xa0 [ 31.237179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.237899] remove_vma+0x139/0x170 [ 31.238341] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.238896] do_vmi_munmap+0x1f1/0x2b0 [ 31.239378] __vm_munmap+0x138/0x3a0 [ 31.239840] __x64_sys_munmap+0x59/0x80 [ 31.240326] do_syscall_64+0x3f/0x90 [ 31.240797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241424] [ 31.241636] The buggy address belongs to the object at ffff88800f11d000 [ 31.241636] which belongs to the cache vm_area_struct of size 168 [ 31.243082] The buggy address is located 88 bytes inside of [ 31.243082] freed 168-byte region [ffff88800f11d000, ffff88800f11d0a8) [ 31.244470] [ 31.244681] The buggy address belongs to the physical page: [ 31.245328] page:00000000c3303d8e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf11d [ 31.246392] memcg:ffff88800c9c5601 [ 31.246825] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.247457] page_type: 0xffffffff() [ 31.247899] raw: 0100000000000200 ffff8880087a0c80 ffffea0000324400 dead000000000006 [ 31.248804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9c5601 [ 31.249693] page dumped because: kasan: bad access detected [ 31.250343] [ 31.250556] Memory state around the buggy address: [ 31.251137] ffff88800f11cf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.251977] ffff88800f11cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.252817] >ffff88800f11d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.253656] ^ [ 31.254369] ffff88800f11d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.255213] ffff88800f11d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.256043] ================================================================== [ 31.256937] Disabling lock debugging due to kernel taint [ 33.213255] BUG: Bad rss-counter state mm:000000003c575251 type:MM_FILEPAGES val:33 [ 33.214620] BUG: Bad rss-counter state mm:000000003c575251 type:MM_ANONPAGES val:22 [ 33.752014] BUG: Bad rss-counter state mm:000000009a7f0220 type:MM_FILEPAGES val:33 [ 33.753104] BUG: Bad rss-counter state mm:000000009a7f0220 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39170' (ECDSA) to the list of known hosts. 2023/06/20 18:49:42 fuzzer started 2023/06/20 18:49:42 dialing manager at localhost:36067 2023/06/20 18:49:42 checking machine... 2023/06/20 18:49:42 checking revisions... [ 34.488877] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:49:42 testing simple program... [ 34.529623] cgroup: Unknown subsys name 'net' [ 34.582765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:49:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=1ffff11002bfff82 RDX=ffff888015d69b40 RSI=ffffffff81402b3e RDI=ffff888015fffd18 RBP=00005606f61aee94 RSP=ffff888015fffca8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=00000000ffffffff R15=00000000ffffffff RIP=ffffffff8140d8ca RFL=00000282 [--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 00007fb77abd6700 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=00007f385b7f1000 CR3=0000000016858000 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=39343a3831203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38393938352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383939 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=ffffffff81741111 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110018fcdfe RSI=ffffffff81741111 RDI=ffff88800c7e7060 RBP=ffff88800c7e7030 RSP=ffff88800c7e6f90 R8 =0000000000000001 R9 =ffff88800c7e6fd8 R10=0000000000038001 R11=000000000001e427 R12=ffff88800c7e7060 R13=0000000000000000 R14=ffff888015c7b680 R15=0000000000092800 RIP=ffffffff813ad470 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 00007f0e433fd900 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=00007f0e433c2008 CR3=0000000019e4c000 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=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