syzkaller login: [ 29.017362] BUG: Bad rss-counter state mm:000000006e128aa2 type:MM_FILEPAGES val:33 [ 29.019338] BUG: Bad rss-counter state mm:000000006e128aa2 type:MM_ANONPAGES val:22 [ 29.182355] ================================================================== [ 29.183463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.184589] Read of size 8 at addr ffff88800ee0c058 by task sshd/221 [ 29.185364] [ 29.185582] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.186446] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.187459] Call Trace: [ 29.187776] [ 29.188062] dump_stack_lvl+0x91/0xf0 [ 29.188562] print_report+0xcc/0x620 [ 29.189045] ? __virt_addr_valid+0x102/0x340 [ 29.189602] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.190221] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.190841] kasan_report+0xbe/0xf0 [ 29.191329] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.191951] vma_interval_tree_remove+0xc75/0xec0 [ 29.192557] vma_prepare+0xc54/0x11a0 [ 29.193043] __split_vma+0x5af/0x950 [ 29.193520] ? __pfx___split_vma+0x10/0x10 [ 29.194045] ? find_held_lock+0x2c/0x110 [ 29.194573] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.195157] ? lock_is_held_type+0x9f/0x120 [ 29.195704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.196317] ? mtree_range_walk+0x632/0x900 [ 29.196879] ? mas_walk+0x5c7/0x7c0 [ 29.197361] do_vmi_munmap+0x1f1/0x2b0 [ 29.197861] mmap_region+0x1f9/0x2660 [ 29.198348] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.198860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.199577] ? __pfx_lock_acquire+0x10/0x10 [ 29.200118] ? __pfx_mmap_region+0x10/0x10 [ 29.200654] ? security_mmap_addr+0x7d/0xa0 [ 29.201187] ? get_unmapped_area+0x1f5/0x3f0 [ 29.201737] do_mmap+0x854/0xf00 [ 29.202186] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.202680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.203271] ksys_mmap_pgoff+0x3af/0x500 [ 29.203784] do_syscall_64+0x3f/0x90 [ 29.204264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.204920] RIP: 0033:0x7fe685978d82 [ 29.205381] 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 [ 29.207559] RSP: 002b:00007ffd400488a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.208485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe685978d82 [ 29.209365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe684db2000 [ 29.210230] RBP: 00007fe684db2000 R08: 0000000000000009 R09: 0000000000001000 [ 29.211114] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ee9695b20 [ 29.211986] R13: 00007ffd400488c0 R14: 00007ffd400488f0 R15: 00007ffd40048c50 [ 29.212851] [ 29.213147] [ 29.213365] Allocated by task 214: [ 29.213803] kasan_save_stack+0x22/0x50 [ 29.214326] kasan_set_track+0x25/0x30 [ 29.214825] __kasan_slab_alloc+0x59/0x70 [ 29.215367] kmem_cache_alloc+0x16b/0x370 [ 29.215889] vm_area_dup+0x20/0x160 [ 29.216363] __split_vma+0x170/0x950 [ 29.216843] split_vma+0xc6/0x110 [ 29.217290] mprotect_fixup+0x8d2/0xb30 [ 29.217802] do_mprotect_pkey+0x87e/0xd40 [ 29.218332] __x64_sys_mprotect+0x78/0xc0 [ 29.218858] do_syscall_64+0x3f/0x90 [ 29.219350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.219998] [ 29.220217] Freed by task 214: [ 29.220607] kasan_save_stack+0x22/0x50 [ 29.221110] kasan_set_track+0x25/0x30 [ 29.221604] kasan_save_free_info+0x2b/0x50 [ 29.222140] __kasan_slab_free+0x10a/0x190 [ 29.222673] kmem_cache_free+0x10d/0x4d0 [ 29.223197] rcu_core+0x8c8/0x2860 [ 29.223643] __do_softirq+0x1b7/0x7d4 [ 29.224128] [ 29.224347] Last potentially related work creation: [ 29.224935] kasan_save_stack+0x22/0x50 [ 29.225442] __kasan_record_aux_stack+0x8e/0xa0 [ 29.226016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.226670] remove_vma+0x139/0x170 [ 29.227128] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.227693] do_vmi_munmap+0x1f1/0x2b0 [ 29.228187] __vm_munmap+0x138/0x3a0 [ 29.228657] __x64_sys_munmap+0x59/0x80 [ 29.229152] do_syscall_64+0x3f/0x90 [ 29.229635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.230277] [ 29.230495] Second to last potentially related work creation: [ 29.231208] kasan_save_stack+0x22/0x50 [ 29.231728] __kasan_record_aux_stack+0x8e/0xa0 [ 29.232310] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.232964] remove_vma+0x139/0x170 [ 29.233422] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.233988] do_vmi_munmap+0x1f1/0x2b0 [ 29.234476] mmap_region+0x1f9/0x2660 [ 29.234959] do_mmap+0x854/0xf00 [ 29.235414] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.235907] ksys_mmap_pgoff+0x7d/0x500 [ 29.236399] do_syscall_64+0x3f/0x90 [ 29.236882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.237522] [ 29.237736] The buggy address belongs to the object at ffff88800ee0c000 [ 29.237736] which belongs to the cache vm_area_struct of size 168 [ 29.239219] The buggy address is located 88 bytes inside of [ 29.239219] freed 168-byte region [ffff88800ee0c000, ffff88800ee0c0a8) [ 29.240622] [ 29.240842] The buggy address belongs to the physical page: [ 29.241501] page:00000000a570f65a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee0c [ 29.242583] memcg:ffff88800d9b6201 [ 29.243009] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.243677] page_type: 0xffffffff() [ 29.244136] raw: 0100000000000200 ffff8880087a0c80 ffffea00003abc80 dead000000000006 [ 29.245124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9b6201 [ 29.246068] page dumped because: kasan: bad access detected [ 29.246741] [ 29.246963] Memory state around the buggy address: [ 29.247566] ffff88800ee0bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.248449] ffff88800ee0bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.249305] >ffff88800ee0c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.250169] ^ [ 29.250903] ffff88800ee0c080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 29.251783] ffff88800ee0c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.252636] ================================================================== [ 29.253689] Disabling lock debugging due to kernel taint [ 31.180942] BUG: Bad rss-counter state mm:000000005939f083 type:MM_FILEPAGES val:33 [ 31.182115] BUG: Bad rss-counter state mm:000000005939f083 type:MM_ANONPAGES val:22 [ 31.577317] BUG: Bad rss-counter state mm:000000001011af6a type:MM_FILEPAGES val:33 [ 31.578979] BUG: Bad rss-counter state mm:000000001011af6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21477' (ECDSA) to the list of known hosts. 2023/06/20 19:50:16 fuzzer started 2023/06/20 19:50:16 dialing manager at localhost:36067 2023/06/20 19:50:16 checking machine... 2023/06/20 19:50:16 checking revisions... [ 32.301782] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:50:17 testing simple program... [ 32.347666] cgroup: Unknown subsys name 'net' [ 32.406758] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:50:16 Registers: info registers vcpu 0 RAX=00000000ad9873e5 RBX=00000000c319bcee RCX=ffff88806ce09bf4 RDX=0000000000000007 RSI=0000000000000005 RDI=0000000085f60cd3 RBP=ffffffff813782f8 RSP=ffff88806ce09b68 R8 =00000000fd6f73e0 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88806ce09bd0 R15=0000000000000007 RIP=ffffffff82270472 RFL=00000a97 [-OS-APC] 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 00007fb537564700 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=00007fe5baf5c0b0 CR3=000000000c5a4000 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=30353a3931203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363135 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=ffff888008e37d38 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e37c01 RSI=ffff888008e37ca8 RDI=ffff888008e37ca8 RBP=ffff888008e379a8 RSP=ffff888008e378d8 R8 =0000000000000001 R9 =ffff888008e37990 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888008e379b0 R13=ffff888008e37998 R14=ffff888008e37ca8 R15=ffff888008e37950 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 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=00007f97218dfdb0 CR3=000000000d746000 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=627f0d67e506fc920f42f623e650931b XMM02=ec2efd57dc4c00df000000000011a768 XMM03=93c343131eccd328000000000011a838 XMM04=0a14333e63db7e6f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133240 XMM06=c291bd5c70af25b900000000001330c8 XMM07=e042d86d42eb936e0000000000122298 XMM08=93c343131eccd328000000000011a838 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000