syzkaller login: [ 31.084332] BUG: Bad rss-counter state mm:0000000047fb188a type:MM_FILEPAGES val:33 [ 31.085830] BUG: Bad rss-counter state mm:0000000047fb188a type:MM_ANONPAGES val:22 [ 31.244476] ================================================================== [ 31.245415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.246365] Read of size 8 at addr ffff88800e3f36b0 by task sshd/221 [ 31.247321] [ 31.247558] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.248447] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.249449] Call Trace: [ 31.249770] [ 31.250055] dump_stack_lvl+0x91/0xf0 [ 31.250556] print_report+0xcc/0x620 [ 31.251047] ? __virt_addr_valid+0x102/0x340 [ 31.251630] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252244] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252885] kasan_report+0xbe/0xf0 [ 31.253378] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.254008] vma_interval_tree_remove+0xc75/0xec0 [ 31.254624] vma_prepare+0xc54/0x11a0 [ 31.255105] __split_vma+0x5af/0x950 [ 31.255612] ? __pfx___split_vma+0x10/0x10 [ 31.256143] ? find_held_lock+0x2c/0x110 [ 31.256688] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.257254] ? lock_is_held_type+0x9f/0x120 [ 31.257805] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.258429] ? mtree_range_walk+0x632/0x900 [ 31.258985] ? mas_walk+0x5c7/0x7c0 [ 31.259481] do_vmi_munmap+0x1f1/0x2b0 [ 31.259985] mmap_region+0x1f9/0x2660 [ 31.260495] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.261022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.261753] ? __pfx_lock_acquire+0x10/0x10 [ 31.262293] ? __pfx_mmap_region+0x10/0x10 [ 31.262840] ? security_mmap_addr+0x7d/0xa0 [ 31.263391] ? get_unmapped_area+0x1f5/0x3f0 [ 31.263957] do_mmap+0x854/0xf00 [ 31.264419] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.264922] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.265498] ksys_mmap_pgoff+0x3af/0x500 [ 31.266010] do_syscall_64+0x3f/0x90 [ 31.266497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267152] RIP: 0033:0x7ff26d603d82 [ 31.267646] 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 [ 31.269820] RSP: 002b:00007fff7695f008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.270749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff26d603d82 [ 31.271621] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff26ca3d000 [ 31.272500] RBP: 00007ff26ca3d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.273371] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ea8845ec0 [ 31.274219] R13: 00007fff7695f020 R14: 00007fff7695f050 R15: 00007fff7695f3b0 [ 31.275085] [ 31.275385] [ 31.275610] Allocated by task 214: [ 31.276039] kasan_save_stack+0x22/0x50 [ 31.276569] kasan_set_track+0x25/0x30 [ 31.277067] __kasan_slab_alloc+0x59/0x70 [ 31.277615] kmem_cache_alloc+0x16b/0x370 [ 31.278131] vm_area_dup+0x20/0x160 [ 31.278594] __split_vma+0x170/0x950 [ 31.279069] split_vma+0xc6/0x110 [ 31.279552] mprotect_fixup+0x8d2/0xb30 [ 31.280055] do_mprotect_pkey+0x87e/0xd40 [ 31.280601] __x64_sys_mprotect+0x78/0xc0 [ 31.281127] do_syscall_64+0x3f/0x90 [ 31.281612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282259] [ 31.282490] Freed by task 214: [ 31.282885] kasan_save_stack+0x22/0x50 [ 31.283401] kasan_set_track+0x25/0x30 [ 31.283916] kasan_save_free_info+0x2b/0x50 [ 31.284470] __kasan_slab_free+0x10a/0x190 [ 31.285005] kmem_cache_free+0x10d/0x4d0 [ 31.285533] rcu_core+0x8c8/0x2860 [ 31.285987] __do_softirq+0x1b7/0x7d4 [ 31.286481] [ 31.286699] Last potentially related work creation: [ 31.287289] kasan_save_stack+0x22/0x50 [ 31.287828] __kasan_record_aux_stack+0x8e/0xa0 [ 31.288506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.289149] remove_vma+0x139/0x170 [ 31.289701] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.290430] do_vmi_munmap+0x1f1/0x2b0 [ 31.291066] __vm_munmap+0x138/0x3a0 [ 31.291683] __x64_sys_munmap+0x59/0x80 [ 31.292321] do_syscall_64+0x3f/0x90 [ 31.292937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293671] [ 31.293888] Second to last potentially related work creation: [ 31.294592] kasan_save_stack+0x22/0x50 [ 31.295100] __kasan_record_aux_stack+0x8e/0xa0 [ 31.295788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.296618] remove_vma+0x139/0x170 [ 31.297193] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.297900] do_vmi_munmap+0x1f1/0x2b0 [ 31.298479] mmap_region+0x1f9/0x2660 [ 31.299043] do_mmap+0x854/0xf00 [ 31.299505] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.299990] ksys_mmap_pgoff+0x3af/0x500 [ 31.300506] do_syscall_64+0x3f/0x90 [ 31.300982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301635] [ 31.301852] The buggy address belongs to the object at ffff88800e3f3658 [ 31.301852] which belongs to the cache vm_area_struct of size 168 [ 31.303357] The buggy address is located 88 bytes inside of [ 31.303357] freed 168-byte region [ffff88800e3f3658, ffff88800e3f3700) [ 31.304812] [ 31.305030] The buggy address belongs to the physical page: [ 31.305708] page:000000001ec62a21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3f3 [ 31.306835] memcg:ffff88800d969e01 [ 31.307277] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.308008] page_type: 0xffffffff() [ 31.308479] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.309431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d969e01 [ 31.310392] page dumped because: kasan: bad access detected [ 31.311065] [ 31.311286] Memory state around the buggy address: [ 31.311920] ffff88800e3f3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.312801] ffff88800e3f3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.313701] >ffff88800e3f3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.314610] ^ [ 31.315214] ffff88800e3f3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.316130] ffff88800e3f3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.317027] ================================================================== [ 31.318002] Disabling lock debugging due to kernel taint [ 33.753650] BUG: Bad rss-counter state mm:000000001aed7570 type:MM_FILEPAGES val:33 [ 33.754674] BUG: Bad rss-counter state mm:000000001aed7570 type:MM_ANONPAGES val:22 [ 34.119174] BUG: Bad rss-counter state mm:00000000bcba4248 type:MM_FILEPAGES val:33 [ 34.120207] BUG: Bad rss-counter state mm:00000000bcba4248 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21247' (ECDSA) to the list of known hosts. 2023/06/19 17:05:08 fuzzer started 2023/06/19 17:05:08 dialing manager at localhost:44161 2023/06/19 17:05:08 checking machine... 2023/06/19 17:05:08 checking revisions... [ 34.806114] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:05:08 testing simple program... [ 34.857799] cgroup: Unknown subsys name 'net' [ 34.919251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:05:08 Registers: info registers vcpu 0 RAX=ffffed10011aff7c RBX=ffff88806ce361a0 RCX=1ffffffff0f6ce40 RDX=1ffff1100d9c6c39 RSI=ffffffff81830685 RDI=ffff88806ce361a0 RBP=1ffff110011aff7c RSP=ffff888008d7fbd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffff88806ce361a0 R13=ffffffff81830685 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d8660 RFL=00000082 [--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 0000000000000000 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=00007fe5d5f0e650 CR3=000000000c61e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09b30 RCX=0000000000000001 RDX=ffff88806cf09b48 RSI=ffff88806cf09b30 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a18 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09b30 R15=ffff88806cf09a98 RIP=ffffffff81130930 RFL=00000292 [--S-A--] 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=00007fca5a1b6460 CR3=0000000008ece000 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=2038303a35303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a35303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000