syzkaller login: [ 51.860651] BUG: Bad rss-counter state mm:0000000022f9102a type:MM_FILEPAGES val:33 [ 51.861307] BUG: Bad rss-counter state mm:0000000022f9102a type:MM_ANONPAGES val:22 [ 52.061499] ================================================================== [ 52.064291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.066441] Read of size 8 at addr ffff88800c496310 by task sshd/223 [ 52.068247] [ 52.068695] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.070310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.073756] Call Trace: [ 52.074323] [ 52.074938] dump_stack_lvl+0x91/0xf0 [ 52.076207] print_report+0xcc/0x620 [ 52.077120] ? __virt_addr_valid+0x102/0x340 [ 52.078109] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.079648] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.082544] kasan_report+0xbe/0xf0 [ 52.083338] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.084623] vma_interval_tree_remove+0xc75/0xec0 [ 52.085803] vma_prepare+0xc54/0x11a0 [ 52.086861] __split_vma+0x5af/0x950 [ 52.088303] ? __pfx___split_vma+0x10/0x10 [ 52.089295] ? find_held_lock+0x2c/0x110 [ 52.090278] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.092328] ? lock_is_held_type+0x9f/0x120 [ 52.093467] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.094634] ? mtree_range_walk+0x632/0x900 [ 52.101513] ? mas_walk+0x5c7/0x7c0 [ 52.102478] do_vmi_munmap+0x1f1/0x2b0 [ 52.104206] mmap_region+0x1f9/0x2660 [ 52.105162] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.106217] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.108585] ? __pfx_lock_acquire+0x10/0x10 [ 52.110242] ? __pfx_mmap_region+0x10/0x10 [ 52.112841] ? security_mmap_addr+0x7d/0xa0 [ 52.113898] ? get_unmapped_area+0x1f5/0x3f0 [ 52.115627] do_mmap+0x854/0xf00 [ 52.116880] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.117967] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.120193] ksys_mmap_pgoff+0x3af/0x500 [ 52.121151] do_syscall_64+0x3f/0x90 [ 52.122103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.124281] RIP: 0033:0x7f79014afd82 [ 52.125227] 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 [ 52.130143] RSP: 002b:00007ffda6c66d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.133595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79014afd82 [ 52.135886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79008e9000 [ 52.137987] RBP: 00007f79008e9000 R08: 0000000000000009 R09: 0000000000001000 [ 52.139829] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559115c80f70 [ 52.141524] R13: 00007ffda6c66d20 R14: 00007ffda6c66d50 R15: 00007ffda6c670b0 [ 52.143779] [ 52.144297] [ 52.144718] Allocated by task 213: [ 52.145550] kasan_save_stack+0x22/0x50 [ 52.146532] kasan_set_track+0x25/0x30 [ 52.148829] __kasan_slab_alloc+0x59/0x70 [ 52.149874] kmem_cache_alloc+0x16b/0x370 [ 52.151338] vm_area_dup+0x20/0x160 [ 52.152275] __split_vma+0x170/0x950 [ 52.153180] split_vma+0xc6/0x110 [ 52.154043] mprotect_fixup+0x8d2/0xb30 [ 52.155607] do_mprotect_pkey+0x87e/0xd40 [ 52.156604] __x64_sys_mprotect+0x78/0xc0 [ 52.157604] do_syscall_64+0x3f/0x90 [ 52.158476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.160080] [ 52.160489] Freed by task 211: [ 52.161196] kasan_save_stack+0x22/0x50 [ 52.162130] kasan_set_track+0x25/0x30 [ 52.164877] kasan_save_free_info+0x2b/0x50 [ 52.165915] __kasan_slab_free+0x10a/0x190 [ 52.167536] kmem_cache_free+0x10d/0x4d0 [ 52.168533] rcu_core+0x8c8/0x2860 [ 52.169316] __do_softirq+0x1b7/0x7d4 [ 52.170281] [ 52.170708] Last potentially related work creation: [ 52.172227] kasan_save_stack+0x22/0x50 [ 52.173184] __kasan_record_aux_stack+0x8e/0xa0 [ 52.174308] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.176023] remove_vma+0x139/0x170 [ 52.176891] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.177955] do_vmi_munmap+0x1f1/0x2b0 [ 52.179016] __vm_munmap+0x138/0x3a0 [ 52.179356] __x64_sys_munmap+0x59/0x80 [ 52.179682] do_syscall_64+0x3f/0x90 [ 52.179991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.180446] [ 52.180598] Second to last potentially related work creation: [ 52.181099] kasan_save_stack+0x22/0x50 [ 52.181453] __kasan_record_aux_stack+0x8e/0xa0 [ 52.181896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.182352] remove_vma+0x139/0x170 [ 52.182678] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.183301] do_vmi_munmap+0x1f1/0x2b0 [ 52.183618] __vm_munmap+0x138/0x3a0 [ 52.183976] __x64_sys_munmap+0x59/0x80 [ 52.184331] do_syscall_64+0x3f/0x90 [ 52.184674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.185130] [ 52.185281] The buggy address belongs to the object at ffff88800c4962b8 [ 52.185281] which belongs to the cache vm_area_struct of size 168 [ 52.186331] The buggy address is located 88 bytes inside of [ 52.186331] freed 168-byte region [ffff88800c4962b8, ffff88800c496360) [ 52.187318] [ 52.187491] The buggy address belongs to the physical page: [ 52.187986] page:00000000bdfc8e64 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c496ae0 pfn:0xc496 [ 52.188925] memcg:ffff88800db16601 [ 52.189232] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 52.189765] page_type: 0xffffffff() [ 52.190082] raw: 0100000000000200 ffff88800879fc80 ffffea00003837c0 dead000000000009 [ 52.190731] raw: ffff88800c496ae0 000000008011000b 00000001ffffffff ffff88800db16601 [ 52.195341] page dumped because: kasan: bad access detected [ 52.195766] [ 52.195906] Memory state around the buggy address: [ 52.196287] ffff88800c496200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 52.199341] ffff88800c496280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 52.199881] >ffff88800c496300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 52.200441] ^ [ 52.200742] ffff88800c496380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 52.201292] ffff88800c496400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 52.201837] ================================================================== [ 52.202579] Disabling lock debugging due to kernel taint [ 58.330671] BUG: Bad rss-counter state mm:00000000000f37ed type:MM_FILEPAGES val:33 [ 58.343363] BUG: Bad rss-counter state mm:00000000000f37ed type:MM_ANONPAGES val:22 [ 59.867323] BUG: Bad rss-counter state mm:000000000242650c type:MM_FILEPAGES val:33 [ 59.867985] BUG: Bad rss-counter state mm:000000000242650c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43612' (ECDSA) to the list of known hosts. 2023/06/20 10:16:02 fuzzer started 2023/06/20 10:16:02 dialing manager at localhost:44161 2023/06/20 10:16:02 checking machine... 2023/06/20 10:16:02 checking revisions... [ 60.895308] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:16:02 testing simple program... [ 60.942602] cgroup: Unknown subsys name 'net' [ 61.049255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:15:46 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff81769d39 RDX=000000000000769d RSI=000000000000769d RDI=ffffffff86505634 RBP=ffff888018107550 RSP=ffff888018107488 R8 =0000000000000000 R9 =ffff888018107538 R10=0000000000038001 R11=000000000001eb7a R12=ffff888018107558 R13=ffff888018107540 R14=ffff888018107539 R15=ffff8880181074f8 RIP=ffffffff8113078b 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 00007fcd1dc59900 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=00007f8a0879f328 CR3=000000000c79e000 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=2031303a36313a3031203032206e754a XMM01=5d3538393736382e39352020205b203a XMM02=415f4d4d3a6570797420633035363234 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36313a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ecfd488 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=ffff88800dac2500 RSP=ffff88800cb3f8a8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e33 RFL=00000046 [---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 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=00007fcd1e089790 CR3=0000000009648000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000