syzkaller login: [ 41.827659] BUG: Bad rss-counter state mm:00000000931c6246 type:MM_FILEPAGES val:33 [ 41.828917] BUG: Bad rss-counter state mm:00000000931c6246 type:MM_ANONPAGES val:22 [ 41.857796] ================================================================== [ 41.858445] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.859010] Read of size 8 at addr ffff88800fd1a058 by task sshd/219 [ 41.859457] [ 41.859584] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.860088] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.860663] Call Trace: [ 41.860850] [ 41.861014] dump_stack_lvl+0x91/0xf0 [ 41.861304] print_report+0xcc/0x620 [ 41.861591] ? __virt_addr_valid+0x102/0x340 [ 41.861922] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.862287] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.862651] kasan_report+0xbe/0xf0 [ 41.862951] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.863336] vma_interval_tree_remove+0xc75/0xec0 [ 41.863806] vma_prepare+0xc54/0x11a0 [ 41.864177] __split_vma+0x5af/0x950 [ 41.864547] ? __pfx___split_vma+0x10/0x10 [ 41.864958] ? find_held_lock+0x2c/0x110 [ 41.865361] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.865807] ? lock_is_held_type+0x9f/0x120 [ 41.866226] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.866704] ? mtree_range_walk+0x632/0x900 [ 41.867135] ? mas_walk+0x5c7/0x7c0 [ 41.867508] do_vmi_munmap+0x1f1/0x2b0 [ 41.867892] mmap_region+0x1f9/0x2660 [ 41.868263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.868664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.869218] ? __pfx_lock_acquire+0x10/0x10 [ 41.869632] ? __pfx_mmap_region+0x10/0x10 [ 41.870040] ? security_mmap_addr+0x7d/0xa0 [ 41.870455] ? get_unmapped_area+0x1f5/0x3f0 [ 41.870896] do_mmap+0x854/0xf00 [ 41.871237] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.871669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.872000] ksys_mmap_pgoff+0x3af/0x500 [ 41.872298] do_syscall_64+0x3f/0x90 [ 41.872582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.872970] RIP: 0033:0x7f03483a6d82 [ 41.873240] 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 [ 41.874501] RSP: 002b:00007ffebd57fb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.875041] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03483a6d82 [ 41.875534] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03477e0000 [ 41.876041] RBP: 00007f03477e0000 R08: 0000000000000009 R09: 0000000000001000 [ 41.876557] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b59217ec0 [ 41.877063] R13: 00007ffebd57fb80 R14: 00007ffebd57fbb0 R15: 00007ffebd57ff10 [ 41.877586] [ 41.877755] [ 41.877877] Allocated by task 212: [ 41.878129] kasan_save_stack+0x22/0x50 [ 41.878427] kasan_set_track+0x25/0x30 [ 41.878723] __kasan_slab_alloc+0x59/0x70 [ 41.879035] kmem_cache_alloc+0x16b/0x370 [ 41.879338] vm_area_dup+0x20/0x160 [ 41.879607] __split_vma+0x170/0x950 [ 41.879879] split_vma+0xc6/0x110 [ 41.880137] mprotect_fixup+0x8d2/0xb30 [ 41.880441] do_mprotect_pkey+0x87e/0xd40 [ 41.880744] __x64_sys_mprotect+0x78/0xc0 [ 41.881052] do_syscall_64+0x3f/0x90 [ 41.881329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.881710] [ 41.881837] Freed by task 212: [ 41.882068] kasan_save_stack+0x22/0x50 [ 41.882365] kasan_set_track+0x25/0x30 [ 41.882656] kasan_save_free_info+0x2b/0x50 [ 41.882986] __kasan_slab_free+0x10a/0x190 [ 41.883294] kmem_cache_free+0x10d/0x4d0 [ 41.883598] rcu_core+0x8c8/0x2860 [ 41.883858] __do_softirq+0x1b7/0x7d4 [ 41.884133] [ 41.884260] Last potentially related work creation: [ 41.884607] kasan_save_stack+0x22/0x50 [ 41.884901] __kasan_record_aux_stack+0x8e/0xa0 [ 41.885239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.885617] remove_vma+0x139/0x170 [ 41.885884] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.886215] do_vmi_munmap+0x1f1/0x2b0 [ 41.886505] __vm_munmap+0x138/0x3a0 [ 41.886791] __x64_sys_munmap+0x59/0x80 [ 41.887079] do_syscall_64+0x3f/0x90 [ 41.887354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.887738] [ 41.887866] The buggy address belongs to the object at ffff88800fd1a000 [ 41.887866] which belongs to the cache vm_area_struct of size 168 [ 41.888748] The buggy address is located 88 bytes inside of [ 41.888748] freed 168-byte region [ffff88800fd1a000, ffff88800fd1a0a8) [ 41.889583] [ 41.889713] The buggy address belongs to the physical page: [ 41.890112] page:0000000000427cd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd1a [ 41.890767] memcg:ffff88800c58fc01 [ 41.891023] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.891441] page_type: 0xffffffff() [ 41.891702] raw: 0100000000000200 ffff88800879fc80 ffffea000067e340 dead000000000005 [ 41.892248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c58fc01 [ 41.892799] page dumped because: kasan: bad access detected [ 41.893186] [ 41.893313] Memory state around the buggy address: [ 41.893663] ffff88800fd19f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 41.894176] ffff88800fd19f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.894692] >ffff88800fd1a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.895206] ^ [ 41.895638] ffff88800fd1a080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 41.896154] ffff88800fd1a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.896659] ================================================================== [ 41.897349] Disabling lock debugging due to kernel taint [ 44.080334] BUG: Bad rss-counter state mm:000000004433fa7d type:MM_FILEPAGES val:33 [ 44.081626] BUG: Bad rss-counter state mm:000000004433fa7d type:MM_ANONPAGES val:22 [ 44.593447] BUG: Bad rss-counter state mm:00000000b7894670 type:MM_FILEPAGES val:33 [ 44.594629] BUG: Bad rss-counter state mm:00000000b7894670 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24866' (ECDSA) to the list of known hosts. 2023/06/20 04:19:04 fuzzer started 2023/06/20 04:19:04 dialing manager at localhost:44161 2023/06/20 04:19:04 checking machine... 2023/06/20 04:19:04 checking revisions... [ 45.219686] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:19:04 testing simple program... [ 45.275018] cgroup: Unknown subsys name 'net' [ 45.328137] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:19:01 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff818a0369 RSP=ffff888014787458 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff8880142d65f0 R13=0000000000000200 R14=0000000000000000 R15=ffff8880142d65e0 RIP=ffffffff812d12e4 RFL=00000002 [-------] 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 00007f1436f0c900 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=00007f14363740c0 CR3=000000000c770000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=46cbec53b30d284e00000000000ae988 XMM05=c3c4d120f9dc1f7f00000000001356f0 XMM06=dfcdbad4f1609c370000000000133e08 XMM07=fb795ef6d65770560000000000124498 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=ffff888019333438 RCX=0000000000000000 RDX=1ffff11001a6add0 RSI=0000000000000004 RDI=0000000000000004 RBP=ffff888019333188 RSP=ffff888019de7610 R8 =0000000000000005 R9 =0000000000000080 R10=0000000000000100 R11=0000000000000000 R12=ffff888018467c00 R13=ffff88800ffc0000 R14=ffff88800ffc0738 R15=ffff888019de7688 RIP=ffffffff814c0384 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 00007f1ddd35c700 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=00007ffc958ef000 CR3=000000000e96a000 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=2034303a39313a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a39313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000