syzkaller login: [ 31.005370] BUG: Bad rss-counter state mm:00000000f63adde5 type:MM_FILEPAGES val:33 [ 31.006371] BUG: Bad rss-counter state mm:00000000f63adde5 type:MM_ANONPAGES val:22 [ 31.175557] ================================================================== [ 31.176625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.177749] Read of size 8 at addr ffff88800f98c3f8 by task sshd/220 [ 31.178819] [ 31.179077] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.180100] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.181199] Call Trace: [ 31.181518] [ 31.181799] dump_stack_lvl+0x91/0xf0 [ 31.182294] print_report+0xcc/0x620 [ 31.182783] ? __virt_addr_valid+0x102/0x340 [ 31.183337] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183957] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.184575] kasan_report+0xbe/0xf0 [ 31.185059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185671] vma_interval_tree_remove+0xc75/0xec0 [ 31.186282] vma_prepare+0xc54/0x11a0 [ 31.186763] __split_vma+0x5af/0x950 [ 31.187232] ? __pfx___split_vma+0x10/0x10 [ 31.187760] ? find_held_lock+0x2c/0x110 [ 31.188280] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.188844] ? lock_is_held_type+0x9f/0x120 [ 31.189394] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.189990] ? mtree_range_walk+0x632/0x900 [ 31.190541] ? mas_walk+0x5c7/0x7c0 [ 31.191021] do_vmi_munmap+0x1f1/0x2b0 [ 31.191514] mmap_region+0x1f9/0x2660 [ 31.192000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.192512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.193227] ? __pfx_lock_acquire+0x10/0x10 [ 31.193753] ? __pfx_mmap_region+0x10/0x10 [ 31.194284] ? security_mmap_addr+0x7d/0xa0 [ 31.194808] ? get_unmapped_area+0x1f5/0x3f0 [ 31.195363] do_mmap+0x854/0xf00 [ 31.195799] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.196287] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.196839] ksys_mmap_pgoff+0x3af/0x500 [ 31.197357] do_syscall_64+0x3f/0x90 [ 31.197833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.198471] RIP: 0033:0x7efd1f015d82 [ 31.198925] 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 [ 31.201033] RSP: 002b:00007ffc310777c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.201936] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd1f015d82 [ 31.202772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd1e44f000 [ 31.203610] RBP: 00007efd1e44f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.204452] R10: 0000000000000812 R11: 0000000000000206 R12: 000056327afdcec0 [ 31.205310] R13: 00007ffc310777e0 R14: 00007ffc31077810 R15: 00007ffc31077b70 [ 31.206161] [ 31.206450] [ 31.206666] Allocated by task 213: [ 31.207100] kasan_save_stack+0x22/0x50 [ 31.207604] kasan_set_track+0x25/0x30 [ 31.208096] __kasan_slab_alloc+0x59/0x70 [ 31.208615] kmem_cache_alloc+0x16b/0x370 [ 31.209127] vm_area_dup+0x20/0x160 [ 31.209578] __split_vma+0x170/0x950 [ 31.210036] split_vma+0xc6/0x110 [ 31.210479] mprotect_fixup+0x8d2/0xb30 [ 31.210975] do_mprotect_pkey+0x87e/0xd40 [ 31.211487] __x64_sys_mprotect+0x78/0xc0 [ 31.212001] do_syscall_64+0x3f/0x90 [ 31.212478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.213136] [ 31.213349] Freed by task 213: [ 31.213741] kasan_save_stack+0x22/0x50 [ 31.214236] kasan_set_track+0x25/0x30 [ 31.214728] kasan_save_free_info+0x2b/0x50 [ 31.215256] __kasan_slab_free+0x10a/0x190 [ 31.215784] kmem_cache_free+0x10d/0x4d0 [ 31.216286] rcu_core+0x8c8/0x2860 [ 31.216725] __do_softirq+0x1b7/0x7d4 [ 31.217204] [ 31.217420] Last potentially related work creation: [ 31.218004] kasan_save_stack+0x22/0x50 [ 31.218502] __kasan_record_aux_stack+0x8e/0xa0 [ 31.219070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.219762] remove_vma+0x139/0x170 [ 31.220211] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.220763] do_vmi_munmap+0x1f1/0x2b0 [ 31.221266] __vm_munmap+0x138/0x3a0 [ 31.221727] __x64_sys_munmap+0x59/0x80 [ 31.222223] do_syscall_64+0x3f/0x90 [ 31.222696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223331] [ 31.223543] The buggy address belongs to the object at ffff88800f98c3a0 [ 31.223543] which belongs to the cache vm_area_struct of size 168 [ 31.224994] The buggy address is located 88 bytes inside of [ 31.224994] freed 168-byte region [ffff88800f98c3a0, ffff88800f98c448) [ 31.226394] [ 31.226607] The buggy address belongs to the physical page: [ 31.227265] page:00000000c8fae500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf98c [ 31.228344] memcg:ffff888019c6ef01 [ 31.228773] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.229439] page_type: 0xffffffff() [ 31.229888] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.230803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c6ef01 [ 31.231709] page dumped because: kasan: bad access detected [ 31.232363] [ 31.232576] Memory state around the buggy address: [ 31.233158] ffff88800f98c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.234008] ffff88800f98c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.234863] >ffff88800f98c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.235709] ^ [ 31.236558] ffff88800f98c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.237425] ffff88800f98c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.238272] ================================================================== [ 31.239257] Disabling lock debugging due to kernel taint [ 33.186377] BUG: Bad rss-counter state mm:0000000034b2c86d type:MM_FILEPAGES val:33 [ 33.187208] BUG: Bad rss-counter state mm:0000000034b2c86d type:MM_ANONPAGES val:22 [ 33.729929] BUG: Bad rss-counter state mm:0000000086bb029f type:MM_FILEPAGES val:33 [ 33.731124] BUG: Bad rss-counter state mm:0000000086bb029f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15747' (ECDSA) to the list of known hosts. 2023/06/20 22:16:51 fuzzer started 2023/06/20 22:16:51 dialing manager at localhost:36067 2023/06/20 22:16:51 checking machine... 2023/06/20 22:16:51 checking revisions... [ 34.363704] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:16:52 testing simple program... [ 34.414600] cgroup: Unknown subsys name 'net' [ 34.487123] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:16:51 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88801a224400 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800cbae100 RBP=ffff88801668f910 RSP=ffff88801668f8d0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f140 R13=ffffea0000688900 R14=ffffffff8367562f R15=ffff88800cbae100 RIP=ffffffff81803bb1 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 00007f08ac8f5700 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=00007f7f91a4f618 CR3=00000000100f2000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031353a3631 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323436 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f0ec683ef20 CR3=000000000dd1c000 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=ad67868e2f8fdd84fe4c798444850451 XMM02=2c67c8bc2e329bc3000000000011b1f8 XMM03=fb795ef6d65770560000000000121f20 XMM04=8cf94e427259ed3500000000000ae988 XMM05=19e9129bd510f2350000000000131e10 XMM06=4fda316b135da52b0000000000131c98 XMM07=e042d86d42eb936e00000000001221a0 XMM08=3717e21e9631836f000000000011b258 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000