syzkaller login: [ 35.468229] BUG: Bad rss-counter state mm:000000005229c5f8 type:MM_FILEPAGES val:33 [ 35.469554] BUG: Bad rss-counter state mm:000000005229c5f8 type:MM_ANONPAGES val:22 [ 35.593681] ================================================================== [ 35.594720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.595386] Read of size 8 at addr ffff888019be1228 by task sshd/219 [ 35.595934] [ 35.596092] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.596815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.597513] Call Trace: [ 35.597744] [ 35.597950] dump_stack_lvl+0x91/0xf0 [ 35.598314] print_report+0xcc/0x620 [ 35.598664] ? __virt_addr_valid+0x102/0x340 [ 35.599071] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.599516] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.599958] kasan_report+0xbe/0xf0 [ 35.600301] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.600754] vma_interval_tree_remove+0xc75/0xec0 [ 35.601188] vma_prepare+0xc54/0x11a0 [ 35.601533] __split_vma+0x5af/0x950 [ 35.601875] ? __pfx___split_vma+0x10/0x10 [ 35.602272] ? find_held_lock+0x2c/0x110 [ 35.602649] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.602964] ? lock_is_held_type+0x9f/0x120 [ 35.603262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.603596] ? mtree_range_walk+0x632/0x900 [ 35.603905] ? mas_walk+0x5c7/0x7c0 [ 35.604167] do_vmi_munmap+0x1f1/0x2b0 [ 35.604439] mmap_region+0x1f9/0x2660 [ 35.604707] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.604995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.605389] ? __pfx_lock_acquire+0x10/0x10 [ 35.605685] ? __pfx_mmap_region+0x10/0x10 [ 35.605979] ? security_mmap_addr+0x7d/0xa0 [ 35.606276] ? get_unmapped_area+0x1f5/0x3f0 [ 35.606579] do_mmap+0x854/0xf00 [ 35.606822] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.607100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.607408] ksys_mmap_pgoff+0x3af/0x500 [ 35.607688] do_syscall_64+0x3f/0x90 [ 35.607953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.608311] RIP: 0033:0x7f456d136d82 [ 35.608564] 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 [ 35.609741] RSP: 002b:00007fff6b4d0368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.610239] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f456d136d82 [ 35.610701] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f456c570000 [ 35.611164] RBP: 00007f456c570000 R08: 0000000000000009 R09: 0000000000001000 [ 35.611625] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9e490eec0 [ 35.612087] R13: 00007fff6b4d0380 R14: 00007fff6b4d03b0 R15: 00007fff6b4d0710 [ 35.612558] [ 35.612720] [ 35.612840] Allocated by task 212: [ 35.613074] kasan_save_stack+0x22/0x50 [ 35.613351] kasan_set_track+0x25/0x30 [ 35.613622] __kasan_slab_alloc+0x59/0x70 [ 35.613910] kmem_cache_alloc+0x16b/0x370 [ 35.614207] vm_area_dup+0x20/0x160 [ 35.614457] __split_vma+0x170/0x950 [ 35.614714] split_vma+0xc6/0x110 [ 35.614956] mprotect_fixup+0x8d2/0xb30 [ 35.615232] do_mprotect_pkey+0x87e/0xd40 [ 35.615519] __x64_sys_mprotect+0x78/0xc0 [ 35.615806] do_syscall_64+0x3f/0x90 [ 35.616065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.616417] [ 35.616537] Freed by task 212: [ 35.616751] kasan_save_stack+0x22/0x50 [ 35.617028] kasan_set_track+0x25/0x30 [ 35.617300] kasan_save_free_info+0x2b/0x50 [ 35.617594] __kasan_slab_free+0x10a/0x190 [ 35.617887] kmem_cache_free+0x10d/0x4d0 [ 35.618164] rcu_core+0x8c8/0x2860 [ 35.618415] __do_softirq+0x1b7/0x7d4 [ 35.618679] [ 35.618799] Last potentially related work creation: [ 35.619120] kasan_save_stack+0x22/0x50 [ 35.619399] __kasan_record_aux_stack+0x8e/0xa0 [ 35.619715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.620067] remove_vma+0x139/0x170 [ 35.620314] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.620621] do_vmi_munmap+0x1f1/0x2b0 [ 35.620887] __vm_munmap+0x138/0x3a0 [ 35.621146] __x64_sys_munmap+0x59/0x80 [ 35.621420] do_syscall_64+0x3f/0x90 [ 35.621681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.622034] [ 35.622154] The buggy address belongs to the object at ffff888019be11d0 [ 35.622154] which belongs to the cache vm_area_struct of size 168 [ 35.623007] The buggy address is located 88 bytes inside of [ 35.623007] freed 168-byte region [ffff888019be11d0, ffff888019be1278) [ 35.623815] [ 35.623939] The buggy address belongs to the physical page: [ 35.624322] page:0000000077c62d6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19be1 [ 35.624948] memcg:ffff88800ecd8b01 [ 35.625197] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.625568] page_type: 0xffffffff() [ 35.625832] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.626379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecd8b01 [ 35.626902] page dumped because: kasan: bad access detected [ 35.627281] [ 35.627406] Memory state around the buggy address: [ 35.627742] ffff888019be1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.628237] ffff888019be1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.628734] >ffff888019be1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.629226] ^ [ 35.629545] ffff888019be1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.630041] ffff888019be1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.630542] ================================================================== [ 35.631135] Disabling lock debugging due to kernel taint [ 37.548093] BUG: Bad rss-counter state mm:00000000b0066fd7 type:MM_FILEPAGES val:33 [ 37.549172] BUG: Bad rss-counter state mm:00000000b0066fd7 type:MM_ANONPAGES val:22 [ 38.033095] BUG: Bad rss-counter state mm:00000000b3359d6d type:MM_FILEPAGES val:33 [ 38.034294] BUG: Bad rss-counter state mm:00000000b3359d6d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54800' (ECDSA) to the list of known hosts. 2023/06/20 00:13:05 fuzzer started 2023/06/20 00:13:05 dialing manager at localhost:44161 2023/06/20 00:13:05 checking machine... 2023/06/20 00:13:05 checking revisions... [ 38.688058] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:13:05 testing simple program... [ 38.737472] cgroup: Unknown subsys name 'net' [ 38.774641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:13:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000018 RCX=0000000000000000 RDX=ffff888015c89b40 RSI=ffffffff8449f1cb RDI=0000000000000006 RBP=ffff88800dcb7e08 RSP=ffff888015f47ce0 R8 =0000000000000006 R9 =00007f012bc95044 R10=00007f012bc95fff R11=0000000000000000 R12=0000000000000003 R13=000000000000000e R14=00007f012bc95044 R15=00007f012bc95fff RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f012b141900 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=00007f012bc95044 CR3=000000001a654000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=ea38f07d926770c3ed63db3632e705e1 XMM05=00000000000000000000000000000000 XMM06=733865636367703d736372203273053d XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f869edb3830 CR3=000000001984c000 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=2035303a33313a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33313a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000