syzkaller login: [ 49.907862] BUG: Bad rss-counter state mm:00000000ffd132e8 type:MM_FILEPAGES val:33 [ 49.909139] BUG: Bad rss-counter state mm:00000000ffd132e8 type:MM_ANONPAGES val:22 [ 49.944903] ================================================================== [ 49.945518] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.946157] Read of size 8 at addr ffff88800ef76a50 by task sshd/219 [ 49.946854] [ 49.946997] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.947575] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.948441] Call Trace: [ 49.948723] [ 49.949041] dump_stack_lvl+0x91/0xf0 [ 49.949433] print_report+0xcc/0x620 [ 49.949803] ? __virt_addr_valid+0x102/0x340 [ 49.950169] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.950703] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.951111] kasan_report+0xbe/0xf0 [ 49.951529] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.952061] vma_interval_tree_remove+0xc75/0xec0 [ 49.952575] vma_prepare+0xc54/0x11a0 [ 49.952946] __split_vma+0x5af/0x950 [ 49.953257] ? __pfx___split_vma+0x10/0x10 [ 49.953611] ? find_held_lock+0x2c/0x110 [ 49.953959] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.954327] ? lock_is_held_type+0x9f/0x120 [ 49.954692] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.955092] ? mtree_range_walk+0x632/0x900 [ 49.955461] ? mas_walk+0x5c7/0x7c0 [ 49.955772] do_vmi_munmap+0x1f1/0x2b0 [ 49.956108] mmap_region+0x1f9/0x2660 [ 49.956431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.956788] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.957264] ? __pfx_lock_acquire+0x10/0x10 [ 49.957635] ? __pfx_mmap_region+0x10/0x10 [ 49.958000] ? security_mmap_addr+0x7d/0xa0 [ 49.958354] ? get_unmapped_area+0x1f5/0x3f0 [ 49.958713] do_mmap+0x854/0xf00 [ 49.958998] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.959318] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.959694] ksys_mmap_pgoff+0x3af/0x500 [ 49.960042] do_syscall_64+0x3f/0x90 [ 49.960353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.960790] RIP: 0033:0x7fdc453bdd82 [ 49.961110] 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 [ 49.962552] RSP: 002b:00007ffedb2cb8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.963159] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc453bdd82 [ 49.963725] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc447f7000 [ 49.964305] RBP: 00007fdc447f7000 R08: 0000000000000009 R09: 0000000000001000 [ 49.964848] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d59ea6ec0 [ 49.965411] R13: 00007ffedb2cb8e0 R14: 00007ffedb2cb910 R15: 00007ffedb2cbc70 [ 49.965974] [ 49.966166] [ 49.966306] Allocated by task 212: [ 49.966582] kasan_save_stack+0x22/0x50 [ 49.966904] kasan_set_track+0x25/0x30 [ 49.967217] __kasan_slab_alloc+0x59/0x70 [ 49.967552] kmem_cache_alloc+0x16b/0x370 [ 49.967887] vm_area_dup+0x20/0x160 [ 49.968190] __split_vma+0x170/0x950 [ 49.968503] split_vma+0xc6/0x110 [ 49.968793] mprotect_fixup+0x8d2/0xb30 [ 49.969120] do_mprotect_pkey+0x87e/0xd40 [ 49.969451] __x64_sys_mprotect+0x78/0xc0 [ 49.969793] do_syscall_64+0x3f/0x90 [ 49.970098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.970530] [ 49.970671] Freed by task 212: [ 49.970923] kasan_save_stack+0x22/0x50 [ 49.971255] kasan_set_track+0x25/0x30 [ 49.971578] kasan_save_free_info+0x2b/0x50 [ 49.971936] __kasan_slab_free+0x10a/0x190 [ 49.972291] kmem_cache_free+0x10d/0x4d0 [ 49.972621] rcu_core+0x8c8/0x2860 [ 49.972903] __do_softirq+0x1b7/0x7d4 [ 49.973223] [ 49.973364] Last potentially related work creation: [ 49.973754] kasan_save_stack+0x22/0x50 [ 49.974080] __kasan_record_aux_stack+0x8e/0xa0 [ 49.974456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.974887] remove_vma+0x139/0x170 [ 49.975175] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.975541] do_vmi_munmap+0x1f1/0x2b0 [ 49.975851] __vm_munmap+0x138/0x3a0 [ 49.976178] __x64_sys_munmap+0x59/0x80 [ 49.976497] do_syscall_64+0x3f/0x90 [ 49.976809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.977233] [ 49.977374] The buggy address belongs to the object at ffff88800ef769f8 [ 49.977374] which belongs to the cache vm_area_struct of size 168 [ 49.978369] The buggy address is located 88 bytes inside of [ 49.978369] freed 168-byte region [ffff88800ef769f8, ffff88800ef76aa0) [ 49.979289] [ 49.979431] The buggy address belongs to the physical page: [ 49.979855] page:00000000c8a248e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef76 [ 49.980579] memcg:ffff88800e3f6c01 [ 49.980857] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.981279] page_type: 0xffffffff() [ 49.981568] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 49.982174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3f6c01 [ 49.982781] page dumped because: kasan: bad access detected [ 49.983224] [ 49.983362] Memory state around the buggy address: [ 49.983746] ffff88800ef76900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.984316] ffff88800ef76980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 49.984879] >ffff88800ef76a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.985449] ^ [ 49.985906] ffff88800ef76a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 49.986456] ffff88800ef76b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.987016] ================================================================== [ 49.987612] Disabling lock debugging due to kernel taint [ 52.818003] BUG: Bad rss-counter state mm:00000000f45d89fb type:MM_FILEPAGES val:33 [ 52.819218] BUG: Bad rss-counter state mm:00000000f45d89fb type:MM_ANONPAGES val:22 [ 53.301043] BUG: Bad rss-counter state mm:0000000036eaf098 type:MM_FILEPAGES val:33 [ 53.302232] BUG: Bad rss-counter state mm:0000000036eaf098 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33039' (ECDSA) to the list of known hosts. 2023/06/20 07:59:40 fuzzer started 2023/06/20 07:59:40 dialing manager at localhost:44161 2023/06/20 07:59:40 checking machine... 2023/06/20 07:59:40 checking revisions... [ 54.072200] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:59:40 testing simple program... [ 54.128327] cgroup: Unknown subsys name 'net' [ 54.177087] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:59:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888009548c80 RCX=0000000000000000 RDX=1ffff110019ccd23 RSI=ffffffff838668a3 RDI=ffff88800ce66918 RBP=0000000000000003 RSP=ffff88801ceb7ab0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff88800ce66900 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff838668bd 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 00007ff8ce0aa900 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=00007fff0b172000 CR3=000000000c640000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09f80 RCX=0000000000000001 RDX=ffff88806cf09f88 RSI=ffff88806cf09f50 RDI=ffff88806cf09aa8 RBP=ffff88806cf02000 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09f50 R15=ffff88806cf09a98 RIP=ffffffff81131cda RFL=00000202 [-------] 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 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=00007fe34c033240 CR3=00000000145c2000 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=b1005026ec1789bc584efb98a83fdccf XMM02=000000000011cf70ec2efd57dc4c00df XMM03=00000000001244b057938b990cad232c XMM04=9cae52424f62cfa500000000000ae988 XMM05=37f5b61f235ae74d0000000000134ea0 XMM06=806171799158d9670000000000133f40 XMM07=e042d86d42eb936e0000000000124730 XMM08=57938b990cad232c000000000011cfd0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000