syzkaller login: [ 31.061035] BUG: Bad rss-counter state mm:00000000381a52ed type:MM_FILEPAGES val:33 [ 31.061815] BUG: Bad rss-counter state mm:00000000381a52ed type:MM_ANONPAGES val:22 [ 31.189934] ================================================================== [ 31.190635] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.191253] Read of size 8 at addr ffff88800e3ce968 by task sshd/220 [ 31.191753] [ 31.191898] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.192460] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.193156] Call Trace: [ 31.193372] [ 31.193557] dump_stack_lvl+0x91/0xf0 [ 31.193887] print_report+0xcc/0x620 [ 31.194491] ? __virt_addr_valid+0x102/0x340 [ 31.194872] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195316] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195752] kasan_report+0xbe/0xf0 [ 31.196085] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.196489] vma_interval_tree_remove+0xc75/0xec0 [ 31.196919] vma_prepare+0xc54/0x11a0 [ 31.197257] __split_vma+0x5af/0x950 [ 31.197587] ? __pfx___split_vma+0x10/0x10 [ 31.197955] ? find_held_lock+0x2c/0x110 [ 31.198310] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.198733] ? lock_is_held_type+0x9f/0x120 [ 31.199092] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.199548] ? mtree_range_walk+0x632/0x900 [ 31.199956] ? mas_walk+0x5c7/0x7c0 [ 31.200310] do_vmi_munmap+0x1f1/0x2b0 [ 31.200648] mmap_region+0x1f9/0x2660 [ 31.200980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.201349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.201850] ? __pfx_lock_acquire+0x10/0x10 [ 31.202218] ? __pfx_mmap_region+0x10/0x10 [ 31.202739] ? security_mmap_addr+0x7d/0xa0 [ 31.203179] ? get_unmapped_area+0x1f5/0x3f0 [ 31.203610] do_mmap+0x854/0xf00 [ 31.203901] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.204239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.204614] ksys_mmap_pgoff+0x3af/0x500 [ 31.204946] do_syscall_64+0x3f/0x90 [ 31.205277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.205733] RIP: 0033:0x7f92a3e1ed82 [ 31.206076] 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 [ 31.207579] RSP: 002b:00007ffe6188a218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.208195] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92a3e1ed82 [ 31.208780] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92a3258000 [ 31.209350] RBP: 00007f92a3258000 R08: 0000000000000009 R09: 0000000000001000 [ 31.209932] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a00d9d980 [ 31.210568] R13: 00007ffe6188a230 R14: 00007ffe6188a260 R15: 00007ffe6188a5c0 [ 31.211158] [ 31.211364] [ 31.211517] Allocated by task 213: [ 31.211824] kasan_save_stack+0x22/0x50 [ 31.212188] kasan_set_track+0x25/0x30 [ 31.212529] __kasan_slab_alloc+0x59/0x70 [ 31.212900] kmem_cache_alloc+0x16b/0x370 [ 31.213258] vm_area_dup+0x20/0x160 [ 31.213567] __split_vma+0x170/0x950 [ 31.213879] split_vma+0xc6/0x110 [ 31.214185] mprotect_fixup+0x8d2/0xb30 [ 31.214579] do_mprotect_pkey+0x87e/0xd40 [ 31.214923] __x64_sys_mprotect+0x78/0xc0 [ 31.215276] do_syscall_64+0x3f/0x90 [ 31.215614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.216073] [ 31.216245] Freed by task 213: [ 31.216513] kasan_save_stack+0x22/0x50 [ 31.216860] kasan_set_track+0x25/0x30 [ 31.217235] kasan_save_free_info+0x2b/0x50 [ 31.217639] __kasan_slab_free+0x10a/0x190 [ 31.218018] kmem_cache_free+0x10d/0x4d0 [ 31.218446] rcu_core+0x8c8/0x2860 [ 31.218743] __do_softirq+0x1b7/0x7d4 [ 31.219065] [ 31.219242] Last potentially related work creation: [ 31.219660] kasan_save_stack+0x22/0x50 [ 31.219984] __kasan_record_aux_stack+0x8e/0xa0 [ 31.220367] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.220791] remove_vma+0x139/0x170 [ 31.221099] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.221491] do_vmi_munmap+0x1f1/0x2b0 [ 31.221818] __vm_munmap+0x138/0x3a0 [ 31.222137] __x64_sys_munmap+0x59/0x80 [ 31.222513] do_syscall_64+0x3f/0x90 [ 31.222843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223294] [ 31.223449] Second to last potentially related work creation: [ 31.223924] kasan_save_stack+0x22/0x50 [ 31.224281] __kasan_record_aux_stack+0x8e/0xa0 [ 31.224664] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.225092] remove_vma+0x139/0x170 [ 31.225389] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.225763] do_vmi_munmap+0x1f1/0x2b0 [ 31.226084] mmap_region+0x1f9/0x2660 [ 31.226476] do_mmap+0x854/0xf00 [ 31.226780] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.227132] ksys_mmap_pgoff+0x3af/0x500 [ 31.227488] do_syscall_64+0x3f/0x90 [ 31.227810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228241] [ 31.228391] The buggy address belongs to the object at ffff88800e3ce910 [ 31.228391] which belongs to the cache vm_area_struct of size 168 [ 31.229394] The buggy address is located 88 bytes inside of [ 31.229394] freed 168-byte region [ffff88800e3ce910, ffff88800e3ce9b8) [ 31.230377] [ 31.230532] The buggy address belongs to the physical page: [ 31.230976] page:00000000c0e44ac4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ce [ 31.231738] memcg:ffff88800ddd7d01 [ 31.232038] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.232490] page_type: 0xffffffff() [ 31.232794] raw: 0100000000000200 ffff88800879fc80 ffffea000026ec80 dead000000000006 [ 31.233400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd7d01 [ 31.233998] page dumped because: kasan: bad access detected [ 31.234495] [ 31.234650] Memory state around the buggy address: [ 31.235018] ffff88800e3ce800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.235749] ffff88800e3ce880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.236364] >ffff88800e3ce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.236925] ^ [ 31.237455] ffff88800e3ce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.238037] ffff88800e3cea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.238674] ================================================================== [ 31.239343] Disabling lock debugging due to kernel taint [ 32.612528] BUG: Bad rss-counter state mm:00000000d4379693 type:MM_FILEPAGES val:33 [ 32.613567] BUG: Bad rss-counter state mm:00000000d4379693 type:MM_ANONPAGES val:22 [ 33.044887] BUG: Bad rss-counter state mm:00000000e5db32fc type:MM_FILEPAGES val:33 [ 33.045684] BUG: Bad rss-counter state mm:00000000e5db32fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6481' (ECDSA) to the list of known hosts. 2023/06/20 08:40:48 fuzzer started 2023/06/20 08:40:48 dialing manager at localhost:44161 2023/06/20 08:40:48 checking machine... 2023/06/20 08:40:48 checking revisions... [ 33.559159] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:40:48 testing simple program... [ 33.594888] cgroup: Unknown subsys name 'net' [ 33.628439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:40:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffd8652aea8 CR3=000000000ea06000 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=2038343a30343a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a30343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001a1a8a5 RBX=dffffc0000000000 RCX=ffffffff812e00e5 RDX=1ffff1100341c3d7 RSI=ffffffff87b86f80 RDI=ffff88800fb87c50 RBP=ffff88800fb87c48 RSP=ffff88801430fce8 R8 =0000000000000001 R9 =ffffed1002861f95 R10=0000000000000003 R11=00000000000b6cb2 R12=ffff88800d0d4528 R13=fffffbfff0f70df0 R14=ffff88801a0e23f8 R15=ffffffff87b86f80 RIP=ffffffff844cc473 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f412b4be900 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=00007f31d9b4c650 CR3=00000000102c4000 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=6c616e72756f6a2f676f6c2f6e75722f XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3bc3a4bbb2a97abd00000000000ae988 XMM05=1d547745728210e90000000000135ca0 XMM06=19e9129bd510f2350000000000134b58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000