syzkaller login: [ 28.760924] BUG: Bad rss-counter state mm:00000000d4aef6d1 type:MM_FILEPAGES val:33 [ 28.762495] BUG: Bad rss-counter state mm:00000000d4aef6d1 type:MM_ANONPAGES val:22 [ 28.931625] ================================================================== [ 28.932630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.933663] Read of size 8 at addr ffff8880147d9c20 by task sshd/220 [ 28.934628] [ 28.934872] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.935804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.936893] Call Trace: [ 28.937246] [ 28.937559] dump_stack_lvl+0x91/0xf0 [ 28.938119] print_report+0xcc/0x620 [ 28.938644] ? __virt_addr_valid+0x102/0x340 [ 28.939255] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.939929] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.940591] kasan_report+0xbe/0xf0 [ 28.941103] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.941809] vma_interval_tree_remove+0xc75/0xec0 [ 28.942453] vma_prepare+0xc54/0x11a0 [ 28.942960] __split_vma+0x5af/0x950 [ 28.943472] ? __pfx___split_vma+0x10/0x10 [ 28.944042] ? find_held_lock+0x2c/0x110 [ 28.944595] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.945215] ? lock_is_held_type+0x9f/0x120 [ 28.945808] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.946469] ? mtree_range_walk+0x632/0x900 [ 28.947061] ? mas_walk+0x5c7/0x7c0 [ 28.947576] do_vmi_munmap+0x1f1/0x2b0 [ 28.948111] mmap_region+0x1f9/0x2660 [ 28.948625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.949174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.949963] ? __pfx_lock_acquire+0x10/0x10 [ 28.950542] ? __pfx_mmap_region+0x10/0x10 [ 28.951113] ? security_mmap_addr+0x7d/0xa0 [ 28.951700] ? get_unmapped_area+0x1f5/0x3f0 [ 28.952297] do_mmap+0x854/0xf00 [ 28.952764] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.953298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.953916] ksys_mmap_pgoff+0x3af/0x500 [ 28.954456] do_syscall_64+0x3f/0x90 [ 28.954978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.955663] RIP: 0033:0x7f9eef546d82 [ 28.956162] 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 [ 28.958471] RSP: 002b:00007ffca3b065b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.959443] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9eef546d82 [ 28.960355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9eee980000 [ 28.961256] RBP: 00007f9eee980000 R08: 0000000000000009 R09: 0000000000001000 [ 28.962182] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b6266df70 [ 28.963080] R13: 00007ffca3b065d0 R14: 00007ffca3b06600 R15: 00007ffca3b06960 [ 28.963995] [ 28.964306] [ 28.964534] Allocated by task 213: [ 28.964993] kasan_save_stack+0x22/0x50 [ 28.965532] kasan_set_track+0x25/0x30 [ 28.966074] __kasan_slab_alloc+0x59/0x70 [ 28.966634] kmem_cache_alloc+0x16b/0x370 [ 28.967185] vm_area_dup+0x20/0x160 [ 28.967669] __split_vma+0x170/0x950 [ 28.968161] split_vma+0xc6/0x110 [ 28.968628] mprotect_fixup+0x8d2/0xb30 [ 28.969162] do_mprotect_pkey+0x87e/0xd40 [ 28.969738] __x64_sys_mprotect+0x78/0xc0 [ 28.970299] do_syscall_64+0x3f/0x90 [ 28.970806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.971484] [ 28.971712] Freed by task 213: [ 28.972127] kasan_save_stack+0x22/0x50 [ 28.972662] kasan_set_track+0x25/0x30 [ 28.973183] kasan_save_free_info+0x2b/0x50 [ 28.973762] __kasan_slab_free+0x10a/0x190 [ 28.974328] kmem_cache_free+0x10d/0x4d0 [ 28.974876] rcu_core+0x8c8/0x2860 [ 28.975357] __do_softirq+0x1b7/0x7d4 [ 28.975947] [ 28.976175] Last potentially related work creation: [ 28.976806] kasan_save_stack+0x22/0x50 [ 28.977338] __kasan_record_aux_stack+0x8e/0xa0 [ 28.977973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.978651] remove_vma+0x139/0x170 [ 28.979135] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.979732] do_vmi_munmap+0x1f1/0x2b0 [ 28.980260] __vm_munmap+0x138/0x3a0 [ 28.980763] __x64_sys_munmap+0x59/0x80 [ 28.981298] do_syscall_64+0x3f/0x90 [ 28.981831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.982526] [ 28.982758] The buggy address belongs to the object at ffff8880147d9bc8 [ 28.982758] which belongs to the cache vm_area_struct of size 168 [ 28.984326] The buggy address is located 88 bytes inside of [ 28.984326] freed 168-byte region [ffff8880147d9bc8, ffff8880147d9c70) [ 28.985860] [ 28.986093] The buggy address belongs to the physical page: [ 28.986794] page:00000000b883e017 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147d9 [ 28.987972] memcg:ffff888019110b01 [ 28.988433] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.989123] page_type: 0xffffffff() [ 28.989610] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.990607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019110b01 [ 28.991578] page dumped because: kasan: bad access detected [ 28.992294] [ 28.992527] Memory state around the buggy address: [ 28.993141] ffff8880147d9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.994072] ffff8880147d9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.994985] >ffff8880147d9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.995888] ^ [ 28.996450] ffff8880147d9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.997365] ffff8880147d9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.998285] ================================================================== [ 28.999312] Disabling lock debugging due to kernel taint [ 31.657123] BUG: Bad rss-counter state mm:00000000c955f545 type:MM_FILEPAGES val:33 [ 31.658125] BUG: Bad rss-counter state mm:00000000c955f545 type:MM_ANONPAGES val:22 [ 32.106963] BUG: Bad rss-counter state mm:000000008b5c1f68 type:MM_FILEPAGES val:33 [ 32.108038] BUG: Bad rss-counter state mm:000000008b5c1f68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5388' (ECDSA) to the list of known hosts. 2023/06/21 05:35:16 fuzzer started 2023/06/21 05:35:17 dialing manager at localhost:36067 2023/06/21 05:35:17 checking machine... 2023/06/21 05:35:17 checking revisions... [ 32.812991] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:35:17 testing simple program... [ 32.863345] cgroup: Unknown subsys name 'net' [ 32.900811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:35:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000004 RCX=ffffffff8113b544 RDX=ffff88801917b680 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800c5fff58 RSP=ffff88800c5ffed0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=0000000000000007 R13=000055809510a704 R14=000055809510a704 R15=ffff888016e9ae40 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f26a6dc4900 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=000055809510a704 CR3=000000000970e000 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=00000000000000000000558093890060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffe1f247648 CR3=0000000005482000 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=00007faf67913510000055fb9cc35790 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