syzkaller login: [ 31.238683] BUG: Bad rss-counter state mm:00000000d0466330 type:MM_FILEPAGES val:33 [ 31.240739] BUG: Bad rss-counter state mm:00000000d0466330 type:MM_ANONPAGES val:22 [ 31.396895] ================================================================== [ 31.397809] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.398744] Read of size 8 at addr ffff88800f6a4140 by task sshd/220 [ 31.399514] [ 31.399735] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.400720] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.401693] Call Trace: [ 31.402012] [ 31.402296] dump_stack_lvl+0x91/0xf0 [ 31.402790] print_report+0xcc/0x620 [ 31.403274] ? __virt_addr_valid+0x102/0x340 [ 31.403845] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.405082] kasan_report+0xbe/0xf0 [ 31.405560] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.406187] vma_interval_tree_remove+0xc75/0xec0 [ 31.406789] vma_prepare+0xc54/0x11a0 [ 31.407266] __split_vma+0x5af/0x950 [ 31.407750] ? __pfx___split_vma+0x10/0x10 [ 31.408280] ? find_held_lock+0x2c/0x110 [ 31.408807] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.409375] ? lock_is_held_type+0x9f/0x120 [ 31.409917] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.410534] ? mtree_range_walk+0x632/0x900 [ 31.411097] ? mas_walk+0x5c7/0x7c0 [ 31.411587] do_vmi_munmap+0x1f1/0x2b0 [ 31.412083] mmap_region+0x1f9/0x2660 [ 31.412566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.413077] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.413790] ? __pfx_lock_acquire+0x10/0x10 [ 31.414313] ? __pfx_mmap_region+0x10/0x10 [ 31.414839] ? security_mmap_addr+0x7d/0xa0 [ 31.415364] ? get_unmapped_area+0x1f5/0x3f0 [ 31.415919] do_mmap+0x854/0xf00 [ 31.416364] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.416861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.417414] ksys_mmap_pgoff+0x3af/0x500 [ 31.417925] do_syscall_64+0x3f/0x90 [ 31.418400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.419047] RIP: 0033:0x7fd859c3bd82 [ 31.419517] 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 [ 31.421649] RSP: 002b:00007ffe91d992b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.422557] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd859c3bd82 [ 31.423414] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd859075000 [ 31.424277] RBP: 00007fd859075000 R08: 0000000000000009 R09: 0000000000001000 [ 31.425122] R10: 0000000000000812 R11: 0000000000000206 R12: 000056185e5bfec0 [ 31.425966] R13: 00007ffe91d992d0 R14: 00007ffe91d99300 R15: 00007ffe91d99660 [ 31.426831] [ 31.427122] [ 31.427337] Allocated by task 213: [ 31.427764] kasan_save_stack+0x22/0x50 [ 31.428283] kasan_set_track+0x25/0x30 [ 31.428782] __kasan_slab_alloc+0x59/0x70 [ 31.429311] kmem_cache_alloc+0x16b/0x370 [ 31.429834] vm_area_dup+0x20/0x160 [ 31.430297] __split_vma+0x170/0x950 [ 31.430765] split_vma+0xc6/0x110 [ 31.431208] mprotect_fixup+0x8d2/0xb30 [ 31.431727] do_mprotect_pkey+0x87e/0xd40 [ 31.432250] __x64_sys_mprotect+0x78/0xc0 [ 31.432768] do_syscall_64+0x3f/0x90 [ 31.433247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.433895] [ 31.434112] Freed by task 203: [ 31.434503] kasan_save_stack+0x22/0x50 [ 31.435017] kasan_set_track+0x25/0x30 [ 31.435531] kasan_save_free_info+0x2b/0x50 [ 31.436070] __kasan_slab_free+0x10a/0x190 [ 31.436613] kmem_cache_free+0x10d/0x4d0 [ 31.437125] rcu_core+0x8c8/0x2860 [ 31.437575] __do_softirq+0x1b7/0x7d4 [ 31.438058] [ 31.438276] Last potentially related work creation: [ 31.438873] kasan_save_stack+0x22/0x50 [ 31.439383] __kasan_record_aux_stack+0x8e/0xa0 [ 31.439989] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.440644] remove_vma+0x139/0x170 [ 31.441096] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.441657] do_vmi_munmap+0x1f1/0x2b0 [ 31.442259] __vm_munmap+0x138/0x3a0 [ 31.442733] __x64_sys_munmap+0x59/0x80 [ 31.443242] do_syscall_64+0x3f/0x90 [ 31.443734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.444378] [ 31.444596] The buggy address belongs to the object at ffff88800f6a40e8 [ 31.444596] which belongs to the cache vm_area_struct of size 168 [ 31.446078] The buggy address is located 88 bytes inside of [ 31.446078] freed 168-byte region [ffff88800f6a40e8, ffff88800f6a4190) [ 31.447494] [ 31.447717] The buggy address belongs to the physical page: [ 31.448382] page:000000009e8dcfa0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6a4 [ 31.449487] memcg:ffff888009e1b701 [ 31.449922] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.450581] page_type: 0xffffffff() [ 31.451034] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.451976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009e1b701 [ 31.452893] page dumped because: kasan: bad access detected [ 31.453556] [ 31.453773] Memory state around the buggy address: [ 31.454353] ffff88800f6a4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.455221] ffff88800f6a4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.456094] >ffff88800f6a4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.456944] ^ [ 31.457583] ffff88800f6a4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.458449] ffff88800f6a4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.459302] ================================================================== [ 31.460321] Disabling lock debugging due to kernel taint [ 33.487548] BUG: Bad rss-counter state mm:00000000b50bc09b type:MM_FILEPAGES val:33 [ 33.488598] BUG: Bad rss-counter state mm:00000000b50bc09b type:MM_ANONPAGES val:22 [ 34.066661] BUG: Bad rss-counter state mm:0000000042eeb766 type:MM_FILEPAGES val:33 [ 34.067670] BUG: Bad rss-counter state mm:0000000042eeb766 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26375' (ECDSA) to the list of known hosts. 2023/06/19 17:52:21 fuzzer started 2023/06/19 17:52:22 dialing manager at localhost:44161 2023/06/19 17:52:22 checking machine... 2023/06/19 17:52:22 checking revisions... [ 34.713683] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:52:22 testing simple program... [ 34.769078] cgroup: Unknown subsys name 'net' [ 34.813909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:52:20 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8113b59b RDX=ffff888014731b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880145fff58 RSP=ffff8880145ffed0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=000055ee35fde738 R14=000055ee35fde738 R15=ffff888018cf1280 RIP=ffffffff814c07eb RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc1a547d900 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=000055ee35fde738 CR3=00000000094d0000 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=dffffc0000000000 RBX=ffff88806cf09fe8 RCX=0000000000000002 RDX=1ffff1100d9e1351 RSI=ffff88806cf09fb8 RDI=ffff88806cf09a88 RBP=ffff88806cf02000 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09fb8 R15=ffff88806cf09a78 RIP=ffffffff81131ca6 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 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=00007f631a4613c0 CR3=000000000e2de000 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=2031323a32353a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a32353a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000