syzkaller login: [ 49.182284] BUG: Bad rss-counter state mm:0000000099ceaaab type:MM_FILEPAGES val:33 [ 49.183537] BUG: Bad rss-counter state mm:0000000099ceaaab type:MM_ANONPAGES val:22 [ 49.341799] ================================================================== [ 49.342802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.343836] Read of size 8 at addr ffff888017e145c8 by task sshd/221 [ 49.344902] [ 49.345143] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.346095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.347182] Call Trace: [ 49.347532] [ 49.347852] dump_stack_lvl+0x91/0xf0 [ 49.348399] print_report+0xcc/0x620 [ 49.348915] ? __virt_addr_valid+0x102/0x340 [ 49.349477] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.350124] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.350757] kasan_report+0xbe/0xf0 [ 49.351256] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.351894] vma_interval_tree_remove+0xc75/0xec0 [ 49.352518] vma_prepare+0xc54/0x11a0 [ 49.353014] __split_vma+0x5af/0x950 [ 49.353494] ? __pfx___split_vma+0x10/0x10 [ 49.354038] ? find_held_lock+0x2c/0x110 [ 49.354584] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.355167] ? lock_is_held_type+0x9f/0x120 [ 49.355720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.356361] ? mtree_range_walk+0x632/0x900 [ 49.356951] ? mas_walk+0x5c7/0x7c0 [ 49.357449] do_vmi_munmap+0x1f1/0x2b0 [ 49.357958] mmap_region+0x1f9/0x2660 [ 49.358452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.358977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.359700] ? __pfx_lock_acquire+0x10/0x10 [ 49.360243] ? __pfx_mmap_region+0x10/0x10 [ 49.360787] ? security_mmap_addr+0x7d/0xa0 [ 49.361333] ? get_unmapped_area+0x1f5/0x3f0 [ 49.361907] do_mmap+0x854/0xf00 [ 49.362363] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.362875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.363446] ksys_mmap_pgoff+0x3af/0x500 [ 49.363968] do_syscall_64+0x3f/0x90 [ 49.364463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.365236] RIP: 0033:0x7ff7d3118d82 [ 49.365786] 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 [ 49.368399] RSP: 002b:00007ffe776b7cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.369484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7d3118d82 [ 49.370490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7d2552000 [ 49.371494] RBP: 00007ff7d2552000 R08: 0000000000000009 R09: 0000000000001000 [ 49.372517] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed70ef4ec0 [ 49.373527] R13: 00007ffe776b7ce0 R14: 00007ffe776b7d10 R15: 00007ffe776b8070 [ 49.374459] [ 49.374765] [ 49.374992] Allocated by task 214: [ 49.375445] kasan_save_stack+0x22/0x50 [ 49.375976] kasan_set_track+0x25/0x30 [ 49.376507] __kasan_slab_alloc+0x59/0x70 [ 49.377067] kmem_cache_alloc+0x16b/0x370 [ 49.377611] vm_area_dup+0x20/0x160 [ 49.378086] __split_vma+0x170/0x950 [ 49.378577] split_vma+0xc6/0x110 [ 49.379043] mprotect_fixup+0x8d2/0xb30 [ 49.379575] do_mprotect_pkey+0x87e/0xd40 [ 49.380145] __x64_sys_mprotect+0x78/0xc0 [ 49.380690] do_syscall_64+0x3f/0x90 [ 49.381186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.381863] [ 49.382088] Freed by task 19: [ 49.382482] kasan_save_stack+0x22/0x50 [ 49.383011] kasan_set_track+0x25/0x30 [ 49.383523] kasan_save_free_info+0x2b/0x50 [ 49.384106] __kasan_slab_free+0x10a/0x190 [ 49.384673] kmem_cache_free+0x10d/0x4d0 [ 49.385209] rcu_core+0x8c8/0x2860 [ 49.385760] __do_softirq+0x1b7/0x7d4 [ 49.386268] [ 49.386495] Last potentially related work creation: [ 49.387108] kasan_save_stack+0x22/0x50 [ 49.387643] __kasan_record_aux_stack+0x8e/0xa0 [ 49.388251] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.388925] remove_vma+0x139/0x170 [ 49.389401] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.389993] do_vmi_munmap+0x1f1/0x2b0 [ 49.390494] __vm_munmap+0x138/0x3a0 [ 49.390981] __x64_sys_munmap+0x59/0x80 [ 49.391489] do_syscall_64+0x3f/0x90 [ 49.391982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.392668] [ 49.392889] The buggy address belongs to the object at ffff888017e14570 [ 49.392889] which belongs to the cache vm_area_struct of size 168 [ 49.394420] The buggy address is located 88 bytes inside of [ 49.394420] freed 168-byte region [ffff888017e14570, ffff888017e14618) [ 49.395879] [ 49.396112] The buggy address belongs to the physical page: [ 49.396792] page:00000000030cd8f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e14 [ 49.397941] memcg:ffff88800f598c01 [ 49.398384] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.399062] page_type: 0xffffffff() [ 49.399536] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.400516] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f598c01 [ 49.401472] page dumped because: kasan: bad access detected [ 49.402165] [ 49.402387] Memory state around the buggy address: [ 49.402990] ffff888017e14480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.403877] ffff888017e14500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 49.404802] >ffff888017e14580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.405782] ^ [ 49.406550] ffff888017e14600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 49.407535] ffff888017e14680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.408522] ================================================================== [ 49.409600] Disabling lock debugging due to kernel taint [ 51.676866] BUG: Bad rss-counter state mm:000000006a7ef875 type:MM_FILEPAGES val:33 [ 51.677841] BUG: Bad rss-counter state mm:000000006a7ef875 type:MM_ANONPAGES val:22 [ 52.145049] BUG: Bad rss-counter state mm:00000000cb7302b0 type:MM_FILEPAGES val:33 [ 52.146208] BUG: Bad rss-counter state mm:00000000cb7302b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48856' (ECDSA) to the list of known hosts. 2023/06/19 18:25:39 fuzzer started 2023/06/19 18:25:39 dialing manager at localhost:44161 2023/06/19 18:25:39 checking machine... 2023/06/19 18:25:39 checking revisions... [ 52.823550] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:25:39 testing simple program... [ 52.871628] cgroup: Unknown subsys name 'net' [ 52.912551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:25:20 Registers: info registers vcpu 0 RAX=ffffffff8611b241 RBX=0000000000000001 RCX=ffffffff8611b23c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85de9d60 RBP=ffff88800f88f340 RSP=ffff88800f88f278 R8 =ffffffff8611b21e R9 =ffff88800f88f328 R10=0000000000038001 R11=000000000001c263 R12=ffff88800f88f348 R13=ffff88800f88f330 R14=ffff88800f88f329 R15=ffff88800f88f2e8 RIP=ffffffff81130a7e RFL=00000202 [-------] 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 00007fabeefd2700 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=00007f3b42c7a618 CR3=000000000e75a000 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=3a5d3033325b646873732038333a3532 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303933 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=0000000000000007 RBX=ffff88806cf2b940 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88806cf2b940 RBP=ffff88806cf2b940 RSP=ffff88806cf09f00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000017103d9d80 R12=0000000000000046 R13=ffff88806cf2b98c R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff8180fd28 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=00007fd43428cbd0 CR3=000000000e75a000 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=2038333a35323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a35323a3831203931 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000