syzkaller login: [ 38.750435] BUG: Bad rss-counter state mm:000000009d829943 type:MM_FILEPAGES val:33 [ 38.752383] BUG: Bad rss-counter state mm:000000009d829943 type:MM_ANONPAGES val:22 [ 38.906314] ================================================================== [ 38.907414] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.908530] Read of size 8 at addr ffff88800e239d08 by task sshd/219 [ 38.909608] [ 38.909884] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.910939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.912013] Call Trace: [ 38.912334] [ 38.912623] dump_stack_lvl+0x91/0xf0 [ 38.913121] print_report+0xcc/0x620 [ 38.913613] ? __virt_addr_valid+0x102/0x340 [ 38.914160] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914965] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915841] kasan_report+0xbe/0xf0 [ 38.916505] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.917282] vma_interval_tree_remove+0xc75/0xec0 [ 38.918100] vma_prepare+0xc54/0x11a0 [ 38.918788] __split_vma+0x5af/0x950 [ 38.919572] ? __pfx___split_vma+0x10/0x10 [ 38.920525] ? find_held_lock+0x2c/0x110 [ 38.921426] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.922410] ? lock_is_held_type+0x9f/0x120 [ 38.923380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.924258] ? mtree_range_walk+0x632/0x900 [ 38.925039] ? mas_walk+0x5c7/0x7c0 [ 38.925715] do_vmi_munmap+0x1f1/0x2b0 [ 38.926412] mmap_region+0x1f9/0x2660 [ 38.927121] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.927855] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.928850] ? __pfx_lock_acquire+0x10/0x10 [ 38.929610] ? __pfx_mmap_region+0x10/0x10 [ 38.930377] ? security_mmap_addr+0x7d/0xa0 [ 38.931150] ? get_unmapped_area+0x1f5/0x3f0 [ 38.931935] do_mmap+0x854/0xf00 [ 38.932571] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.933256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.934043] ksys_mmap_pgoff+0x3af/0x500 [ 38.934786] do_syscall_64+0x3f/0x90 [ 38.935466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936379] RIP: 0033:0x7fe1a984cd82 [ 38.937038] 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 [ 38.940010] RSP: 002b:00007ffc5b8ecc78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.941286] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1a984cd82 [ 38.942469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1a8c86000 [ 38.943678] RBP: 00007fe1a8c86000 R08: 0000000000000009 R09: 0000000000001000 [ 38.944888] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a81bb3ec0 [ 38.946082] R13: 00007ffc5b8ecc90 R14: 00007ffc5b8eccc0 R15: 00007ffc5b8ed020 [ 38.947121] [ 38.947421] [ 38.947639] Allocated by task 212: [ 38.948067] kasan_save_stack+0x22/0x50 [ 38.948583] kasan_set_track+0x25/0x30 [ 38.949081] __kasan_slab_alloc+0x59/0x70 [ 38.949596] kmem_cache_alloc+0x16b/0x370 [ 38.950112] vm_area_dup+0x20/0x160 [ 38.950575] __split_vma+0x170/0x950 [ 38.951120] split_vma+0xc6/0x110 [ 38.951576] mprotect_fixup+0x8d2/0xb30 [ 38.952079] do_mprotect_pkey+0x87e/0xd40 [ 38.952600] __x64_sys_mprotect+0x78/0xc0 [ 38.953127] do_syscall_64+0x3f/0x90 [ 38.953608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954251] [ 38.954468] Freed by task 212: [ 38.954893] kasan_save_stack+0x22/0x50 [ 38.955411] kasan_set_track+0x25/0x30 [ 38.955916] kasan_save_free_info+0x2b/0x50 [ 38.956459] __kasan_slab_free+0x10a/0x190 [ 38.956993] kmem_cache_free+0x10d/0x4d0 [ 38.957507] rcu_core+0x8c8/0x2860 [ 38.957953] __do_softirq+0x1b7/0x7d4 [ 38.958435] [ 38.958657] Last potentially related work creation: [ 38.959253] kasan_save_stack+0x22/0x50 [ 38.959758] __kasan_record_aux_stack+0x8e/0xa0 [ 38.960330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.960971] remove_vma+0x139/0x170 [ 38.961429] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.961986] do_vmi_munmap+0x1f1/0x2b0 [ 38.962474] __vm_munmap+0x138/0x3a0 [ 38.962959] __x64_sys_munmap+0x59/0x80 [ 38.963461] do_syscall_64+0x3f/0x90 [ 38.963941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.964596] [ 38.964809] Second to last potentially related work creation: [ 38.965487] kasan_save_stack+0x22/0x50 [ 38.965993] __kasan_record_aux_stack+0x8e/0xa0 [ 38.966578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.967246] remove_vma+0x139/0x170 [ 38.967703] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.968270] do_vmi_munmap+0x1f1/0x2b0 [ 38.968778] mmap_region+0x1f9/0x2660 [ 38.969269] do_mmap+0x854/0xf00 [ 38.969711] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.970199] ksys_mmap_pgoff+0x3af/0x500 [ 38.970714] do_syscall_64+0x3f/0x90 [ 38.971192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.971829] [ 38.972043] The buggy address belongs to the object at ffff88800e239cb0 [ 38.972043] which belongs to the cache vm_area_struct of size 168 [ 38.973523] The buggy address is located 88 bytes inside of [ 38.973523] freed 168-byte region [ffff88800e239cb0, ffff88800e239d58) [ 38.974960] [ 38.975177] The buggy address belongs to the physical page: [ 38.975834] page:00000000f73e6e0b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe239 [ 38.976922] memcg:ffff88800d939c01 [ 38.977347] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.978041] page_type: 0xffffffff() [ 38.978492] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a4280 dead000000000003 [ 38.979425] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d939c01 [ 38.980325] page dumped because: kasan: bad access detected [ 38.980980] [ 38.981204] Memory state around the buggy address: [ 38.981778] ffff88800e239c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.982648] ffff88800e239c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.983504] >ffff88800e239d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.984360] ^ [ 38.984794] ffff88800e239d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.985643] ffff88800e239e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.986494] ================================================================== [ 38.987462] Disabling lock debugging due to kernel taint [ 41.155059] BUG: Bad rss-counter state mm:000000009bf7c4d5 type:MM_FILEPAGES val:33 [ 41.156212] BUG: Bad rss-counter state mm:000000009bf7c4d5 type:MM_ANONPAGES val:22 [ 41.568375] BUG: Bad rss-counter state mm:0000000097b1e49c type:MM_FILEPAGES val:33 [ 41.569551] BUG: Bad rss-counter state mm:0000000097b1e49c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54369' (ECDSA) to the list of known hosts. 2023/06/21 04:50:20 fuzzer started 2023/06/21 04:50:21 dialing manager at localhost:36067 2023/06/21 04:50:21 checking machine... 2023/06/21 04:50:21 checking revisions... [ 42.328740] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:50:21 testing simple program... [ 42.383800] cgroup: Unknown subsys name 'net' [ 42.433178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002f26f00 RSI=ffffffff8450cc7f RDI=ffff8880179377a0 RBP=ffff8880179377f8 RSP=ffff888017937730 R8 =0000000000000001 R9 =ffff8880179377e0 R10=0000000000038001 R11=0000000000022457 R12=ffff888017937800 R13=ffff8880179377e8 R14=ffff88800ff60000 R15=ffff8880179377a0 RIP=ffffffff81130682 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 00007f74cc5b6900 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=00007f74ccb6e0b0 CR3=0000000018f86000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=00000000800d000d RDX=00000000800d000c RSI=ffffffff81806deb RDI=0000000000000000 RBP=ffff88800d80f580 RSP=ffff88800d80f4c0 R8 =00000000800d000d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f780 R13=ffff88801443d5f0 R14=ffffea0000510f40 R15=ffff88806cf3de00 RIP=ffffffff81807426 RFL=00000082 [--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 00007fc7d4a45900 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=00007fc7d3e92640 CR3=000000000cf1c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3f2ff3c54a71a09c00000000000ae988 XMM05=ca895daa686ee86c00000000001341b0 XMM06=2c1494c5dc9fca960000000000132be0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000