syzkaller login: [ 38.701607] BUG: Bad rss-counter state mm:00000000e31b0c73 type:MM_FILEPAGES val:33 [ 38.702954] BUG: Bad rss-counter state mm:00000000e31b0c73 type:MM_ANONPAGES val:22 [ 38.871245] ================================================================== [ 38.872196] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.873137] Read of size 8 at addr ffff88800c64f058 by task sshd/221 [ 38.873922] [ 38.874142] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.875099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.876096] Call Trace: [ 38.876422] [ 38.876705] dump_stack_lvl+0x91/0xf0 [ 38.877202] print_report+0xcc/0x620 [ 38.877697] ? __virt_addr_valid+0x102/0x340 [ 38.878253] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878870] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879500] kasan_report+0xbe/0xf0 [ 38.880009] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880643] vma_interval_tree_remove+0xc75/0xec0 [ 38.881251] vma_prepare+0xc54/0x11a0 [ 38.881737] __split_vma+0x5af/0x950 [ 38.882226] ? __pfx___split_vma+0x10/0x10 [ 38.882755] ? find_held_lock+0x2c/0x110 [ 38.883289] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.883874] ? lock_is_held_type+0x9f/0x120 [ 38.884424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.885035] ? mtree_range_walk+0x632/0x900 [ 38.885600] ? mas_walk+0x5c7/0x7c0 [ 38.886081] do_vmi_munmap+0x1f1/0x2b0 [ 38.886586] mmap_region+0x1f9/0x2660 [ 38.887083] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.887602] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.888326] ? __pfx_lock_acquire+0x10/0x10 [ 38.888865] ? __pfx_mmap_region+0x10/0x10 [ 38.889402] ? security_mmap_addr+0x7d/0xa0 [ 38.889941] ? get_unmapped_area+0x1f5/0x3f0 [ 38.890497] do_mmap+0x854/0xf00 [ 38.890936] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.891431] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.892022] ksys_mmap_pgoff+0x3af/0x500 [ 38.892537] do_syscall_64+0x3f/0x90 [ 38.893020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893664] RIP: 0033:0x7f0e503cfd82 [ 38.894118] 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 [ 38.896334] RSP: 002b:00007fffe361a118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.897240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e503cfd82 [ 38.898110] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e4f809000 [ 38.898968] RBP: 00007f0e4f809000 R08: 0000000000000009 R09: 0000000000001000 [ 38.899820] R10: 0000000000000812 R11: 0000000000000206 R12: 000056283fbb4f70 [ 38.900677] R13: 00007fffe361a130 R14: 00007fffe361a160 R15: 00007fffe361a4c0 [ 38.901544] [ 38.901835] [ 38.902051] Allocated by task 214: [ 38.902478] kasan_save_stack+0x22/0x50 [ 38.902990] kasan_set_track+0x25/0x30 [ 38.903486] __kasan_slab_alloc+0x59/0x70 [ 38.904041] kmem_cache_alloc+0x16b/0x370 [ 38.904558] vm_area_dup+0x20/0x160 [ 38.905010] __split_vma+0x170/0x950 [ 38.905478] split_vma+0xc6/0x110 [ 38.905922] mprotect_fixup+0x8d2/0xb30 [ 38.906422] do_mprotect_pkey+0x87e/0xd40 [ 38.906943] __x64_sys_mprotect+0x78/0xc0 [ 38.907461] do_syscall_64+0x3f/0x90 [ 38.907948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908591] [ 38.908804] Freed by task 214: [ 38.909198] kasan_save_stack+0x22/0x50 [ 38.909701] kasan_set_track+0x25/0x30 [ 38.910199] kasan_save_free_info+0x2b/0x50 [ 38.910734] __kasan_slab_free+0x10a/0x190 [ 38.911265] kmem_cache_free+0x10d/0x4d0 [ 38.911788] rcu_core+0x8c8/0x2860 [ 38.912228] __do_softirq+0x1b7/0x7d4 [ 38.912703] [ 38.912919] Last potentially related work creation: [ 38.913504] kasan_save_stack+0x22/0x50 [ 38.914003] __kasan_record_aux_stack+0x8e/0xa0 [ 38.914574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.915216] remove_vma+0x139/0x170 [ 38.915685] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.916244] do_vmi_munmap+0x1f1/0x2b0 [ 38.916726] __vm_munmap+0x138/0x3a0 [ 38.917205] __x64_sys_munmap+0x59/0x80 [ 38.917697] do_syscall_64+0x3f/0x90 [ 38.918171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918813] [ 38.919031] Second to last potentially related work creation: [ 38.919715] kasan_save_stack+0x22/0x50 [ 38.920212] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921420] remove_vma+0x139/0x170 [ 38.921869] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922429] do_vmi_munmap+0x1f1/0x2b0 [ 38.922912] mmap_region+0x1f9/0x2660 [ 38.923385] do_mmap+0x854/0xf00 [ 38.923830] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924314] ksys_mmap_pgoff+0x3af/0x500 [ 38.924815] do_syscall_64+0x3f/0x90 [ 38.925292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925928] [ 38.926143] The buggy address belongs to the object at ffff88800c64f000 [ 38.926143] which belongs to the cache vm_area_struct of size 168 [ 38.927598] The buggy address is located 88 bytes inside of [ 38.927598] freed 168-byte region [ffff88800c64f000, ffff88800c64f0a8) [ 38.928996] [ 38.929211] The buggy address belongs to the physical page: [ 38.929861] page:00000000a30b76c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc64f [ 38.930935] memcg:ffff888019ffc401 [ 38.931361] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.932060] page_type: 0xffffffff() [ 38.932509] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c01c0 0000000000000009 [ 38.933429] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ffc401 [ 38.934328] page dumped because: kasan: bad access detected [ 38.934981] [ 38.935196] Memory state around the buggy address: [ 38.935793] ffff88800c64ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.936649] ffff88800c64ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.937504] >ffff88800c64f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.938351] ^ [ 38.939074] ffff88800c64f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.939939] ffff88800c64f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.940778] ================================================================== [ 38.941734] Disabling lock debugging due to kernel taint [ 40.749136] BUG: Bad rss-counter state mm:0000000038fbce1f type:MM_FILEPAGES val:33 [ 40.750321] BUG: Bad rss-counter state mm:0000000038fbce1f type:MM_ANONPAGES val:22 [ 41.225664] BUG: Bad rss-counter state mm:0000000004d1ec33 type:MM_FILEPAGES val:33 [ 41.226824] BUG: Bad rss-counter state mm:0000000004d1ec33 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37913' (ECDSA) to the list of known hosts. 2023/06/20 20:44:58 fuzzer started 2023/06/20 20:44:58 dialing manager at localhost:36067 2023/06/20 20:44:58 checking machine... 2023/06/20 20:44:58 checking revisions... [ 41.872899] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:44:58 testing simple program... [ 41.927230] cgroup: Unknown subsys name 'net' [ 42.085161] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:44:58 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888009aea458 RCX=0000000080000000 RDX=ffff88800fb7b680 RSI=ffffffff83ab1921 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fc8f500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000c1800000c18 R12=0000000000000000 R13=000000000000008b R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff814c0871 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 00007f4a61df0900 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=00007f4a623a7618 CR3=000000000c960000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000040 RBX=ffff88806cf09b38 RCX=0000000000000001 RDX=1ffff1100d9e138b RSI=ffffffff81976419 RDI=ffff88806cf09b44 RBP=ffff88806cf09c58 RSP=ffff88806cf09a50 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000025fc6 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888015d251c0 R15=ffff88801a1a88a0 RIP=ffffffff813ad553 RFL=00000287 [--S--PC] 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 00007f37e3a43700 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=00007f0ce1734ac0 CR3=000000000e496000 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=2037353a34343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000