syzkaller login: [ 30.185486] BUG: Bad rss-counter state mm:000000003b56671f type:MM_FILEPAGES val:33 [ 30.186745] BUG: Bad rss-counter state mm:000000003b56671f type:MM_ANONPAGES val:22 [ 30.337854] ================================================================== [ 30.338766] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.339702] Read of size 8 at addr ffff8880095addf0 by task sshd/222 [ 30.340476] [ 30.340843] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.341710] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.342691] Call Trace: [ 30.343153] [ 30.343497] dump_stack_lvl+0x91/0xf0 [ 30.344083] print_report+0xcc/0x620 [ 30.344688] ? __virt_addr_valid+0x102/0x340 [ 30.345348] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.346082] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.346808] kasan_report+0xbe/0xf0 [ 30.347399] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.348169] vma_interval_tree_remove+0xc75/0xec0 [ 30.348929] vma_prepare+0xc54/0x11a0 [ 30.349520] __split_vma+0x5af/0x950 [ 30.350095] ? __pfx___split_vma+0x10/0x10 [ 30.350745] ? find_held_lock+0x2c/0x110 [ 30.351388] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.352087] ? lock_is_held_type+0x9f/0x120 [ 30.352785] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.353528] ? mtree_range_walk+0x632/0x900 [ 30.354123] ? mas_walk+0x5c7/0x7c0 [ 30.354603] do_vmi_munmap+0x1f1/0x2b0 [ 30.355099] mmap_region+0x1f9/0x2660 [ 30.355586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.356094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.356814] ? __pfx_lock_acquire+0x10/0x10 [ 30.357352] ? __pfx_mmap_region+0x10/0x10 [ 30.357874] ? security_mmap_addr+0x7d/0xa0 [ 30.358413] ? get_unmapped_area+0x1f5/0x3f0 [ 30.358967] do_mmap+0x854/0xf00 [ 30.359409] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.359905] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.360485] ksys_mmap_pgoff+0x3af/0x500 [ 30.361024] do_syscall_64+0x3f/0x90 [ 30.361505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362167] RIP: 0033:0x7f7eefdc0d82 [ 30.362626] 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 [ 30.364779] RSP: 002b:00007ffc97eb9dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.365689] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7eefdc0d82 [ 30.366535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7eef1fa000 [ 30.367376] RBP: 00007f7eef1fa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.368231] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563dcc289f60 [ 30.369099] R13: 00007ffc97eb9df0 R14: 00007ffc97eb9e20 R15: 00007ffc97eba180 [ 30.369965] [ 30.370270] [ 30.370485] Allocated by task 215: [ 30.370915] kasan_save_stack+0x22/0x50 [ 30.371426] kasan_set_track+0x25/0x30 [ 30.371946] __kasan_slab_alloc+0x59/0x70 [ 30.372486] kmem_cache_alloc+0x16b/0x370 [ 30.373065] vm_area_dup+0x20/0x160 [ 30.373550] __split_vma+0x170/0x950 [ 30.374023] split_vma+0xc6/0x110 [ 30.374462] mprotect_fixup+0x8d2/0xb30 [ 30.374958] do_mprotect_pkey+0x87e/0xd40 [ 30.375490] __x64_sys_mprotect+0x78/0xc0 [ 30.376018] do_syscall_64+0x3f/0x90 [ 30.376491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377182] [ 30.377402] Freed by task 215: [ 30.377807] kasan_save_stack+0x22/0x50 [ 30.378374] kasan_set_track+0x25/0x30 [ 30.378869] kasan_save_free_info+0x2b/0x50 [ 30.379396] __kasan_slab_free+0x10a/0x190 [ 30.379931] kmem_cache_free+0x10d/0x4d0 [ 30.380439] rcu_core+0x8c8/0x2860 [ 30.380888] __do_softirq+0x1b7/0x7d4 [ 30.381378] [ 30.381591] Last potentially related work creation: [ 30.382180] kasan_save_stack+0x22/0x50 [ 30.382678] __kasan_record_aux_stack+0x8e/0xa0 [ 30.383263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.383939] remove_vma+0x139/0x170 [ 30.384412] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.385014] do_vmi_munmap+0x1f1/0x2b0 [ 30.385523] __vm_munmap+0x138/0x3a0 [ 30.385985] __x64_sys_munmap+0x59/0x80 [ 30.386479] do_syscall_64+0x3f/0x90 [ 30.386959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.387615] [ 30.387846] The buggy address belongs to the object at ffff8880095add98 [ 30.387846] which belongs to the cache vm_area_struct of size 168 [ 30.389415] The buggy address is located 88 bytes inside of [ 30.389415] freed 168-byte region [ffff8880095add98, ffff8880095ade40) [ 30.390838] [ 30.391059] The buggy address belongs to the physical page: [ 30.391719] page:00000000a910e58a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95ad [ 30.392840] memcg:ffff8880168dcf01 [ 30.393333] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.393986] page_type: 0xffffffff() [ 30.394437] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.395351] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168dcf01 [ 30.396305] page dumped because: kasan: bad access detected [ 30.397003] [ 30.397256] Memory state around the buggy address: [ 30.397836] ffff8880095adc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.398693] ffff8880095add00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.399547] >ffff8880095add80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.400412] ^ [ 30.401274] ffff8880095ade00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.402191] ffff8880095ade80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.403058] ================================================================== [ 30.404088] Disabling lock debugging due to kernel taint [ 31.928671] BUG: Bad rss-counter state mm:0000000041bde103 type:MM_FILEPAGES val:33 [ 31.929388] BUG: Bad rss-counter state mm:0000000041bde103 type:MM_ANONPAGES val:22 [ 32.462086] BUG: Bad rss-counter state mm:00000000f5090b78 type:MM_FILEPAGES val:33 [ 32.463237] BUG: Bad rss-counter state mm:00000000f5090b78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34935' (ECDSA) to the list of known hosts. 2023/06/20 20:52:15 fuzzer started 2023/06/20 20:52:16 dialing manager at localhost:36067 2023/06/20 20:52:16 checking machine... 2023/06/20 20:52:16 checking revisions... [ 33.081465] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:52:16 testing simple program... [ 33.132259] cgroup: Unknown subsys name 'net' [ 33.185766] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:52:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88801a0579c8 RSI=ffff88801a0579a8 RDI=ffff88801a057558 RBP=ffff88801a0575e0 RSP=ffff88801a057538 R8 =0000000000000001 R9 =ffff88801a057588 R10=0000000000038001 R11=000000000008b92e R12=ffff88801a057610 R13=0000000000000000 R14=ffff88801a061b40 R15=ffff88801a057548 RIP=ffffffff81130937 RFL=00000292 [--S-A--] 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 00007fbc3238f900 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=00007ffc42972000 CR3=000000000fc9e000 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=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=00007f2546b10ee0 CR3=0000000019d9a000 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=2035313a32353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a32353a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000