syzkaller login: [ 30.781487] BUG: Bad rss-counter state mm:000000005b39b6ea type:MM_FILEPAGES val:33 [ 30.782602] BUG: Bad rss-counter state mm:000000005b39b6ea type:MM_ANONPAGES val:22 [ 30.928316] ================================================================== [ 30.929021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.929741] Read of size 8 at addr ffff8880161f6798 by task sshd/219 [ 30.930321] [ 30.930487] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.931288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.932038] Call Trace: [ 30.932283] [ 30.932499] dump_stack_lvl+0x91/0xf0 [ 30.932880] print_report+0xcc/0x620 [ 30.933288] ? __virt_addr_valid+0x102/0x340 [ 30.933710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.934184] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.934652] kasan_report+0xbe/0xf0 [ 30.935044] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.935524] vma_interval_tree_remove+0xc75/0xec0 [ 30.935943] vma_prepare+0xc54/0x11a0 [ 30.936240] __split_vma+0x5af/0x950 [ 30.936525] ? __pfx___split_vma+0x10/0x10 [ 30.936850] ? find_held_lock+0x2c/0x110 [ 30.937174] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.937530] ? lock_is_held_type+0x9f/0x120 [ 30.937856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.938233] ? mtree_range_walk+0x632/0x900 [ 30.938572] ? mas_walk+0x5c7/0x7c0 [ 30.938868] do_vmi_munmap+0x1f1/0x2b0 [ 30.939176] mmap_region+0x1f9/0x2660 [ 30.939475] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.939792] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.940233] ? __pfx_lock_acquire+0x10/0x10 [ 30.940563] ? __pfx_mmap_region+0x10/0x10 [ 30.940890] ? security_mmap_addr+0x7d/0xa0 [ 30.941218] ? get_unmapped_area+0x1f5/0x3f0 [ 30.941555] do_mmap+0x854/0xf00 [ 30.941829] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.942128] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.942480] ksys_mmap_pgoff+0x3af/0x500 [ 30.942798] do_syscall_64+0x3f/0x90 [ 30.943093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.943492] RIP: 0033:0x7f4952dded82 [ 30.943776] 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 [ 30.945095] RSP: 002b:00007ffc232db428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.945659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4952dded82 [ 30.946186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4952218000 [ 30.946704] RBP: 00007f4952218000 R08: 0000000000000009 R09: 0000000000001000 [ 30.947236] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f999f6cd90 [ 30.947756] R13: 00007ffc232db440 R14: 00007ffc232db470 R15: 00007ffc232db7d0 [ 30.948293] [ 30.948476] [ 30.948607] Allocated by task 212: [ 30.948867] kasan_save_stack+0x22/0x50 [ 30.949179] kasan_set_track+0x25/0x30 [ 30.949504] __kasan_slab_alloc+0x59/0x70 [ 30.949837] kmem_cache_alloc+0x16b/0x370 [ 30.950163] vm_area_dup+0x20/0x160 [ 30.950460] __split_vma+0x170/0x950 [ 30.950730] split_vma+0xc6/0x110 [ 30.950993] mprotect_fixup+0x8d2/0xb30 [ 30.951293] do_mprotect_pkey+0x87e/0xd40 [ 30.951593] __x64_sys_mprotect+0x78/0xc0 [ 30.951905] do_syscall_64+0x3f/0x90 [ 30.952180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.952561] [ 30.952688] Freed by task 212: [ 30.952915] kasan_save_stack+0x22/0x50 [ 30.953209] kasan_set_track+0x25/0x30 [ 30.953495] kasan_save_free_info+0x2b/0x50 [ 30.953814] __kasan_slab_free+0x10a/0x190 [ 30.954158] kmem_cache_free+0x10d/0x4d0 [ 30.954453] rcu_core+0x8c8/0x2860 [ 30.954711] __do_softirq+0x1b7/0x7d4 [ 30.955018] [ 30.955149] Last potentially related work creation: [ 30.955507] kasan_save_stack+0x22/0x50 [ 30.955813] __kasan_record_aux_stack+0x8e/0xa0 [ 30.956165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.956564] remove_vma+0x139/0x170 [ 30.956837] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.957187] do_vmi_munmap+0x1f1/0x2b0 [ 30.957491] __vm_munmap+0x138/0x3a0 [ 30.957777] __x64_sys_munmap+0x59/0x80 [ 30.958090] do_syscall_64+0x3f/0x90 [ 30.958381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.958787] [ 30.958917] The buggy address belongs to the object at ffff8880161f6740 [ 30.958917] which belongs to the cache vm_area_struct of size 168 [ 30.959829] The buggy address is located 88 bytes inside of [ 30.959829] freed 168-byte region [ffff8880161f6740, ffff8880161f67e8) [ 30.960688] [ 30.960817] The buggy address belongs to the physical page: [ 30.961224] page:00000000c506c897 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x161f6 [ 30.961894] memcg:ffff8880102f4101 [ 30.962150] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.962546] page_type: 0xffffffff() [ 30.962822] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.963398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102f4101 [ 30.963957] page dumped because: kasan: bad access detected [ 30.964391] [ 30.964517] Memory state around the buggy address: [ 30.964886] ffff8880161f6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.965419] ffff8880161f6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.965958] >ffff8880161f6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.966506] ^ [ 30.966818] ffff8880161f6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.967336] ffff8880161f6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.967856] ================================================================== [ 30.968681] Disabling lock debugging due to kernel taint [ 33.223766] BUG: Bad rss-counter state mm:000000003a5e8b1c type:MM_FILEPAGES val:33 [ 33.224934] BUG: Bad rss-counter state mm:000000003a5e8b1c type:MM_ANONPAGES val:22 [ 33.699693] BUG: Bad rss-counter state mm:00000000ef5e9095 type:MM_FILEPAGES val:33 [ 33.700694] BUG: Bad rss-counter state mm:00000000ef5e9095 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2526' (ECDSA) to the list of known hosts. 2023/06/21 04:52:30 fuzzer started 2023/06/21 04:52:30 dialing manager at localhost:36067 2023/06/21 04:52:30 checking machine... 2023/06/21 04:52:30 checking revisions... [ 34.428865] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:52:30 testing simple program... [ 34.474696] cgroup: Unknown subsys name 'net' [ 34.511792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:52:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffcce9bdb98 CR3=0000000005482000 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=00007f415450b5100000558f577aa790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000010000000 RDX=0000000000000008 RSI=000000000000004c RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88801475f440 R8 =0000000000000000 R9 =ffff88801475f4b8 R10=0000000000000008 R11=0000000000000001 R12=0000000010000000 R13=0000000000000008 R14=000000000000004c R15=ffff88801475f4b8 RIP=ffffffff81efcf25 RFL=00000282 [--S----] 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 00007f3969b10900 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=00007f6ee9340650 CR3=00000000094f2000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=54e5d89a51014ca300000000000ae988 XMM05=c30d2cfa45f72f6800000000001322d0 XMM06=806171799158d96700000000001310c0 XMM07=fb795ef6d65770560000000000121370 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000