syzkaller login: [ 38.670643] BUG: Bad rss-counter state mm:00000000570454ba type:MM_FILEPAGES val:33 [ 38.671743] BUG: Bad rss-counter state mm:00000000570454ba type:MM_ANONPAGES val:22 [ 38.860469] ================================================================== [ 38.861438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.862445] Read of size 8 at addr ffff88800e7c7058 by task sshd/221 [ 38.863394] [ 38.863627] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.864554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.865745] Call Trace: [ 38.866151] [ 38.866501] dump_stack_lvl+0x91/0xf0 [ 38.867105] print_report+0xcc/0x620 [ 38.867712] ? __virt_addr_valid+0x102/0x340 [ 38.868396] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.869166] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.869903] kasan_report+0xbe/0xf0 [ 38.870467] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871211] vma_interval_tree_remove+0xc75/0xec0 [ 38.871933] vma_prepare+0xc54/0x11a0 [ 38.872514] __split_vma+0x5af/0x950 [ 38.873068] ? __pfx___split_vma+0x10/0x10 [ 38.873704] ? find_held_lock+0x2c/0x110 [ 38.874326] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.874994] ? lock_is_held_type+0x9f/0x120 [ 38.875663] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.876347] ? mtree_range_walk+0x632/0x900 [ 38.876941] ? mas_walk+0x5c7/0x7c0 [ 38.877451] do_vmi_munmap+0x1f1/0x2b0 [ 38.877977] mmap_region+0x1f9/0x2660 [ 38.878487] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.879031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.879800] ? __pfx_lock_acquire+0x10/0x10 [ 38.880372] ? __pfx_mmap_region+0x10/0x10 [ 38.880941] ? security_mmap_addr+0x7d/0xa0 [ 38.881507] ? get_unmapped_area+0x1f5/0x3f0 [ 38.882089] do_mmap+0x854/0xf00 [ 38.882552] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.883076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.883686] ksys_mmap_pgoff+0x3af/0x500 [ 38.884225] do_syscall_64+0x3f/0x90 [ 38.884735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.885434] RIP: 0033:0x7fc211861d82 [ 38.885940] 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 [ 38.888223] RSP: 002b:00007ffccbf56ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.889196] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc211861d82 [ 38.890102] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc210c9b000 [ 38.891001] RBP: 00007fc210c9b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.891914] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de4d301ec0 [ 38.892821] R13: 00007ffccbf56bc0 R14: 00007ffccbf56bf0 R15: 00007ffccbf56f50 [ 38.893734] [ 38.894046] [ 38.894279] Allocated by task 214: [ 38.894732] kasan_save_stack+0x22/0x50 [ 38.895283] kasan_set_track+0x25/0x30 [ 38.895814] __kasan_slab_alloc+0x59/0x70 [ 38.896377] kmem_cache_alloc+0x16b/0x370 [ 38.896933] vm_area_dup+0x20/0x160 [ 38.897422] __split_vma+0x170/0x950 [ 38.897926] split_vma+0xc6/0x110 [ 38.898396] mprotect_fixup+0x8d2/0xb30 [ 38.898931] do_mprotect_pkey+0x87e/0xd40 [ 38.899489] __x64_sys_mprotect+0x78/0xc0 [ 38.900046] do_syscall_64+0x3f/0x90 [ 38.900550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901236] [ 38.901462] Freed by task 211: [ 38.901879] kasan_save_stack+0x22/0x50 [ 38.902418] kasan_set_track+0x25/0x30 [ 38.902948] kasan_save_free_info+0x2b/0x50 [ 38.903520] __kasan_slab_free+0x10a/0x190 [ 38.904093] kmem_cache_free+0x10d/0x4d0 [ 38.904638] rcu_core+0x8c8/0x2860 [ 38.905112] __do_softirq+0x1b7/0x7d4 [ 38.905614] [ 38.905840] Last potentially related work creation: [ 38.906458] kasan_save_stack+0x22/0x50 [ 38.906989] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.908298] remove_vma+0x139/0x170 [ 38.908786] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.909382] do_vmi_munmap+0x1f1/0x2b0 [ 38.909907] __vm_munmap+0x138/0x3a0 [ 38.910407] __x64_sys_munmap+0x59/0x80 [ 38.910946] do_syscall_64+0x3f/0x90 [ 38.911455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912145] [ 38.912379] Second to last potentially related work creation: [ 38.913110] kasan_save_stack+0x22/0x50 [ 38.913650] __kasan_record_aux_stack+0x8e/0xa0 [ 38.914262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.914951] remove_vma+0x139/0x170 [ 38.915456] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.916056] do_vmi_munmap+0x1f1/0x2b0 [ 38.916581] mmap_region+0x1f9/0x2660 [ 38.917097] do_mmap+0x854/0xf00 [ 38.917560] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.918083] ksys_mmap_pgoff+0x3af/0x500 [ 38.918623] do_syscall_64+0x3f/0x90 [ 38.919131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919823] [ 38.920049] The buggy address belongs to the object at ffff88800e7c7000 [ 38.920049] which belongs to the cache vm_area_struct of size 168 [ 38.921619] The buggy address is located 88 bytes inside of [ 38.921619] freed 168-byte region [ffff88800e7c7000, ffff88800e7c70a8) [ 38.923119] [ 38.923384] The buggy address belongs to the physical page: [ 38.924083] page:00000000c8f1c322 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7c7 [ 38.925245] memcg:ffff88800e5d2f01 [ 38.925705] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.926404] page_type: 0xffffffff() [ 38.926888] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 38.927867] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5d2f01 [ 38.928840] page dumped because: kasan: bad access detected [ 38.929549] [ 38.929781] Memory state around the buggy address: [ 38.930391] ffff88800e7c6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.931304] ffff88800e7c6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.932212] >ffff88800e7c7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.933107] ^ [ 38.933886] ffff88800e7c7080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.934808] ffff88800e7c7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.935727] ================================================================== [ 38.936805] Disabling lock debugging due to kernel taint [ 40.825264] BUG: Bad rss-counter state mm:00000000da427d15 type:MM_FILEPAGES val:33 [ 40.826481] BUG: Bad rss-counter state mm:00000000da427d15 type:MM_ANONPAGES val:22 [ 41.284684] BUG: Bad rss-counter state mm:00000000a3682719 type:MM_FILEPAGES val:33 [ 41.285684] BUG: Bad rss-counter state mm:00000000a3682719 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50655' (ECDSA) to the list of known hosts. 2023/06/20 00:27:33 fuzzer started 2023/06/20 00:27:34 dialing manager at localhost:44161 2023/06/20 00:27:34 checking machine... 2023/06/20 00:27:34 checking revisions... [ 41.999202] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:27:34 testing simple program... [ 42.051759] cgroup: Unknown subsys name 'net' [ 42.094812] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:27:26 Registers: info registers vcpu 0 RAX=ffffed1001c71400 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffff88800e38a000 RDI=0000000000000000 RBP=ffffffff8186b9c5 RSP=ffff88806ce09de0 R8 =0000000000000280 R9 =0000000000000000 R10=ffffed1001c71400 R11=0000000000000000 R12=ffff88800e38a000 R13=ffff8880087b6780 R14=ffffffff8186b9c5 R15=ffff88800c69f000 RIP=ffffffff8180f41b 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=00007f3970fa3dc0 CR3=000000000e5e4000 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=2033333a37323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a37323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffffed1002bdefcf RCX=ffffffff8173f65a RDX=ffff88800dc78000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888015ef7e78 RSP=ffff888015ef7c00 R8 =0000000000000006 R9 =00007f07bd3cd000 R10=00007f07bd3d1000 R11=0000000000000000 R12=00007f07bd3d1fff R13=ffff888015ef7e70 R14=00007f07bd3cd000 R15=00007f07bd3d2000 RIP=ffffffff814c07eb 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 00007f07bd422900 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=00007f07bd3d1008 CR3=0000000016b16000 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=00000000000000000000000000000000 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