syzkaller login: [ 31.402253] BUG: Bad rss-counter state mm:0000000060b2d351 type:MM_FILEPAGES val:33 [ 31.403448] BUG: Bad rss-counter state mm:0000000060b2d351 type:MM_ANONPAGES val:22 [ 31.446715] ================================================================== [ 31.447711] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.448770] Read of size 8 at addr ffff88800ca03140 by task sshd/220 [ 31.449625] [ 31.449868] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.450862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.451950] Call Trace: [ 31.452308] [ 31.452629] dump_stack_lvl+0x91/0xf0 [ 31.453180] print_report+0xcc/0x620 [ 31.453848] ? __virt_addr_valid+0x102/0x340 [ 31.454499] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.455189] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.455880] kasan_report+0xbe/0xf0 [ 31.456421] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.457117] vma_interval_tree_remove+0xc75/0xec0 [ 31.457784] vma_prepare+0xc54/0x11a0 [ 31.458367] __split_vma+0x5af/0x950 [ 31.458917] ? __pfx___split_vma+0x10/0x10 [ 31.459522] ? find_held_lock+0x2c/0x110 [ 31.460123] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.460768] ? lock_is_held_type+0x9f/0x120 [ 31.461392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.462122] ? mtree_range_walk+0x632/0x900 [ 31.462770] ? mas_walk+0x5c7/0x7c0 [ 31.463328] do_vmi_munmap+0x1f1/0x2b0 [ 31.463904] mmap_region+0x1f9/0x2660 [ 31.464468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.465077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.465907] ? __pfx_lock_acquire+0x10/0x10 [ 31.466570] ? __pfx_mmap_region+0x10/0x10 [ 31.467175] ? security_mmap_addr+0x7d/0xa0 [ 31.467783] ? get_unmapped_area+0x1f5/0x3f0 [ 31.468418] do_mmap+0x854/0xf00 [ 31.468916] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.469488] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.470166] ksys_mmap_pgoff+0x3af/0x500 [ 31.470756] do_syscall_64+0x3f/0x90 [ 31.471312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.472050] RIP: 0033:0x7fd088ccfd82 [ 31.472576] 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 [ 31.475047] RSP: 002b:00007ffca2d9d7a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.476084] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd088ccfd82 [ 31.477043] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd088109000 [ 31.478049] RBP: 00007fd088109000 R08: 0000000000000009 R09: 0000000000001000 [ 31.479026] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f5c925f70 [ 31.480002] R13: 00007ffca2d9d7c0 R14: 00007ffca2d9d7f0 R15: 00007ffca2d9db50 [ 31.480988] [ 31.481326] [ 31.481571] Allocated by task 213: [ 31.482096] kasan_save_stack+0x22/0x50 [ 31.482693] kasan_set_track+0x25/0x30 [ 31.483244] __kasan_slab_alloc+0x59/0x70 [ 31.483833] kmem_cache_alloc+0x16b/0x370 [ 31.484420] vm_area_dup+0x20/0x160 [ 31.484931] __split_vma+0x170/0x950 [ 31.485443] split_vma+0xc6/0x110 [ 31.485961] mprotect_fixup+0x8d2/0xb30 [ 31.486538] do_mprotect_pkey+0x87e/0xd40 [ 31.487121] __x64_sys_mprotect+0x78/0xc0 [ 31.487700] do_syscall_64+0x3f/0x90 [ 31.488225] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.488935] [ 31.489175] Freed by task 213: [ 31.489604] kasan_save_stack+0x22/0x50 [ 31.490177] kasan_set_track+0x25/0x30 [ 31.490716] kasan_save_free_info+0x2b/0x50 [ 31.491306] __kasan_slab_free+0x10a/0x190 [ 31.491895] kmem_cache_free+0x10d/0x4d0 [ 31.492476] rcu_core+0x8c8/0x2860 [ 31.492984] __do_softirq+0x1b7/0x7d4 [ 31.493526] [ 31.493773] Last potentially related work creation: [ 31.494468] kasan_save_stack+0x22/0x50 [ 31.495039] __kasan_record_aux_stack+0x8e/0xa0 [ 31.495690] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.496421] remove_vma+0x139/0x170 [ 31.496929] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.497564] do_vmi_munmap+0x1f1/0x2b0 [ 31.498142] __vm_munmap+0x138/0x3a0 [ 31.498679] __x64_sys_munmap+0x59/0x80 [ 31.499243] do_syscall_64+0x3f/0x90 [ 31.499778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.500506] [ 31.500742] The buggy address belongs to the object at ffff88800ca030e8 [ 31.500742] which belongs to the cache vm_area_struct of size 168 [ 31.502416] The buggy address is located 88 bytes inside of [ 31.502416] freed 168-byte region [ffff88800ca030e8, ffff88800ca03190) [ 31.504002] [ 31.504244] The buggy address belongs to the physical page: [ 31.504992] page:000000008b3e805a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca03 [ 31.506325] memcg:ffff888019dd7e01 [ 31.506812] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.507548] page_type: 0xffffffff() [ 31.508053] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.509095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dd7e01 [ 31.510137] page dumped because: kasan: bad access detected [ 31.510876] [ 31.511118] Memory state around the buggy address: [ 31.511766] ffff88800ca03000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.512713] ffff88800ca03080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.513673] >ffff88800ca03100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.514643] ^ [ 31.515351] ffff88800ca03180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.516308] ffff88800ca03200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.517255] ================================================================== [ 31.518440] Disabling lock debugging due to kernel taint [ 33.408937] BUG: Bad rss-counter state mm:000000003add2b41 type:MM_FILEPAGES val:33 [ 33.409921] BUG: Bad rss-counter state mm:000000003add2b41 type:MM_ANONPAGES val:22 [ 34.011458] BUG: Bad rss-counter state mm:00000000e9916280 type:MM_FILEPAGES val:33 [ 34.012663] BUG: Bad rss-counter state mm:00000000e9916280 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9457' (ECDSA) to the list of known hosts. 2023/06/20 08:52:13 fuzzer started 2023/06/20 08:52:13 dialing manager at localhost:44161 2023/06/20 08:52:13 checking machine... 2023/06/20 08:52:13 checking revisions... [ 34.666081] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:52:13 testing simple program... [ 34.720883] cgroup: Unknown subsys name 'net' [ 34.777206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:52:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860acb48 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008d7f988 RSP=ffff888008d7f8c0 R8 =ffffffff860acb4c R9 =ffff888008d7f970 R10=0000000000038001 R11=0000000000009bea R12=ffff888008d7f990 R13=ffff888008d7f978 R14=ffff888008d7ff20 R15=ffff888008d7f930 RIP=ffffffff81130bb0 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 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=00007f615b765be0 CR3=000000000dae0000 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=32353a3830203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343530 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=dffffc0000000000 RBX=ffffffff83684ee6 RCX=0000000000000001 RDX=1ffff11003935eec RSI=ffff88801c9afae0 RDI=ffffffff83684ee6 RBP=ffffffff83684ee6 RSP=ffff88801c9af6b8 R8 =0000000000000001 R9 =ffff88801c9af748 R10=0000000000038001 R11=000000000008b61a R12=0000000000000001 R13=0000000000000000 R14=ffff888018048000 R15=0000000000000001 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f102a056900 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=00007ffca2209000 CR3=000000000d5c2000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000