syzkaller login: [ 31.225963] BUG: Bad rss-counter state mm:00000000b33e621f type:MM_FILEPAGES val:33 [ 31.227135] BUG: Bad rss-counter state mm:00000000b33e621f type:MM_ANONPAGES val:22 [ 31.269537] ================================================================== [ 31.270492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.271439] Read of size 8 at addr ffff88801a41fd08 by task sshd/220 [ 31.272214] [ 31.272430] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.273300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.274312] Call Trace: [ 31.274640] [ 31.274932] dump_stack_lvl+0x91/0xf0 [ 31.275428] print_report+0xcc/0x620 [ 31.275926] ? __virt_addr_valid+0x102/0x340 [ 31.276486] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277754] kasan_report+0xbe/0xf0 [ 31.278302] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278939] vma_interval_tree_remove+0xc75/0xec0 [ 31.279539] vma_prepare+0xc54/0x11a0 [ 31.280008] __split_vma+0x5af/0x950 [ 31.280469] ? __pfx___split_vma+0x10/0x10 [ 31.280987] ? find_held_lock+0x2c/0x110 [ 31.281513] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.282073] ? lock_is_held_type+0x9f/0x120 [ 31.282630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.283238] ? mtree_range_walk+0x632/0x900 [ 31.283799] ? mas_walk+0x5c7/0x7c0 [ 31.284270] do_vmi_munmap+0x1f1/0x2b0 [ 31.284772] mmap_region+0x1f9/0x2660 [ 31.285257] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.285764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.286508] ? __pfx_lock_acquire+0x10/0x10 [ 31.287017] ? __pfx_mmap_region+0x10/0x10 [ 31.287559] ? security_mmap_addr+0x7d/0xa0 [ 31.288096] ? get_unmapped_area+0x1f5/0x3f0 [ 31.288640] do_mmap+0x854/0xf00 [ 31.289069] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.289582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.290157] ksys_mmap_pgoff+0x3af/0x500 [ 31.290670] do_syscall_64+0x3f/0x90 [ 31.291177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.291841] RIP: 0033:0x7fa43fecfd82 [ 31.292302] 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 [ 31.294508] RSP: 002b:00007fff859ed268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.295462] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa43fecfd82 [ 31.296341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa43f309000 [ 31.297189] RBP: 00007fa43f309000 R08: 0000000000000009 R09: 0000000000001000 [ 31.298037] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f37be03ec0 [ 31.298903] R13: 00007fff859ed280 R14: 00007fff859ed2b0 R15: 00007fff859ed610 [ 31.299772] [ 31.300072] [ 31.300285] Allocated by task 213: [ 31.300716] kasan_save_stack+0x22/0x50 [ 31.301226] kasan_set_track+0x25/0x30 [ 31.301719] __kasan_slab_alloc+0x59/0x70 [ 31.302255] kmem_cache_alloc+0x16b/0x370 [ 31.302774] vm_area_dup+0x20/0x160 [ 31.303234] __split_vma+0x170/0x950 [ 31.303700] split_vma+0xc6/0x110 [ 31.304146] mprotect_fixup+0x8d2/0xb30 [ 31.304647] do_mprotect_pkey+0x87e/0xd40 [ 31.305171] __x64_sys_mprotect+0x78/0xc0 [ 31.305694] do_syscall_64+0x3f/0x90 [ 31.306196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306839] [ 31.307057] Freed by task 213: [ 31.307457] kasan_save_stack+0x22/0x50 [ 31.307959] kasan_set_track+0x25/0x30 [ 31.308457] kasan_save_free_info+0x2b/0x50 [ 31.308987] __kasan_slab_free+0x10a/0x190 [ 31.309521] kmem_cache_free+0x10d/0x4d0 [ 31.310028] rcu_core+0x8c8/0x2860 [ 31.310482] __do_softirq+0x1b7/0x7d4 [ 31.310970] [ 31.311190] Last potentially related work creation: [ 31.311779] kasan_save_stack+0x22/0x50 [ 31.312280] __kasan_record_aux_stack+0x8e/0xa0 [ 31.312853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.313498] remove_vma+0x139/0x170 [ 31.313949] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.314534] do_vmi_munmap+0x1f1/0x2b0 [ 31.315025] __vm_munmap+0x138/0x3a0 [ 31.315496] __x64_sys_munmap+0x59/0x80 [ 31.315998] do_syscall_64+0x3f/0x90 [ 31.316482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317127] [ 31.317352] The buggy address belongs to the object at ffff88801a41fcb0 [ 31.317352] which belongs to the cache vm_area_struct of size 168 [ 31.318819] The buggy address is located 88 bytes inside of [ 31.318819] freed 168-byte region [ffff88801a41fcb0, ffff88801a41fd58) [ 31.320216] [ 31.320434] The buggy address belongs to the physical page: [ 31.321093] page:00000000f1485d4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a41f [ 31.322188] memcg:ffff88800f1c5f01 [ 31.322617] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.323274] page_type: 0xffffffff() [ 31.323726] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.324666] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1c5f01 [ 31.325659] page dumped because: kasan: bad access detected [ 31.326347] [ 31.326569] Memory state around the buggy address: [ 31.327152] ffff88801a41fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.328014] ffff88801a41fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.328895] >ffff88801a41fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.329751] ^ [ 31.330208] ffff88801a41fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.331070] ffff88801a41fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.331938] ================================================================== [ 31.332919] Disabling lock debugging due to kernel taint [ 33.231503] BUG: Bad rss-counter state mm:000000000781464d type:MM_FILEPAGES val:33 [ 33.232494] BUG: Bad rss-counter state mm:000000000781464d type:MM_ANONPAGES val:22 [ 33.658928] BUG: Bad rss-counter state mm:00000000d671c243 type:MM_FILEPAGES val:33 [ 33.660106] BUG: Bad rss-counter state mm:00000000d671c243 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9192' (ECDSA) to the list of known hosts. 2023/06/20 16:08:22 fuzzer started 2023/06/20 16:08:22 dialing manager at localhost:36067 2023/06/20 16:08:22 checking machine... 2023/06/20 16:08:22 checking revisions... [ 34.365966] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:08:22 testing simple program... [ 34.410440] cgroup: Unknown subsys name 'net' [ 34.455900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:08:22 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007ffc9e14ac28 RCX=00007f13f1d77366 RDX=00000000000001f4 RSI=0000000000000001 RDI=00007ffc9e14ac28 RBP=00007ffc9e14cf50 RSP=00007ffc9e14abf8 R8 =00007ffc9e14ac1c R9 =000000000000000c R10=0000000000000000 R11=0000000000000246 R12=0000000000000008 R13=0000000000000050 R14=00007ffc9e14ac1c R15=00000000000000f4 RIP=00007f13f1d6b3b0 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f13f1884900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc9e14b000 CR3=000000000fbdc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007ffd5dbacfb8 CR3=000000000c71a000 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=2031323a38303a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38303a3631203032 XMM08=6369767265732e4079747465672f6d65 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000