syzkaller login: [ 30.126621] BUG: Bad rss-counter state mm:00000000e4fe1bd3 type:MM_FILEPAGES val:33 [ 30.127626] BUG: Bad rss-counter state mm:00000000e4fe1bd3 type:MM_ANONPAGES val:22 [ 30.289964] ================================================================== [ 30.290899] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.291851] Read of size 8 at addr ffff88800e1344e0 by task sshd/221 [ 30.292628] [ 30.293043] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.293917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.294906] Call Trace: [ 30.295235] [ 30.295518] dump_stack_lvl+0x91/0xf0 [ 30.296025] print_report+0xcc/0x620 [ 30.296541] ? __virt_addr_valid+0x102/0x340 [ 30.297102] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.297713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.298345] kasan_report+0xbe/0xf0 [ 30.298828] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.299450] vma_interval_tree_remove+0xc75/0xec0 [ 30.300064] vma_prepare+0xc54/0x11a0 [ 30.300556] __split_vma+0x5af/0x950 [ 30.301032] ? __pfx___split_vma+0x10/0x10 [ 30.301576] ? find_held_lock+0x2c/0x110 [ 30.302116] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.302698] ? lock_is_held_type+0x9f/0x120 [ 30.303250] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.303873] ? mtree_range_walk+0x632/0x900 [ 30.304467] ? mas_walk+0x5c7/0x7c0 [ 30.304953] do_vmi_munmap+0x1f1/0x2b0 [ 30.305458] mmap_region+0x1f9/0x2660 [ 30.305951] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.306474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.307202] ? __pfx_lock_acquire+0x10/0x10 [ 30.307741] ? __pfx_mmap_region+0x10/0x10 [ 30.308308] ? security_mmap_addr+0x7d/0xa0 [ 30.308847] ? get_unmapped_area+0x1f5/0x3f0 [ 30.309399] do_mmap+0x854/0xf00 [ 30.309844] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.310342] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.310913] ksys_mmap_pgoff+0x3af/0x500 [ 30.311420] do_syscall_64+0x3f/0x90 [ 30.311907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.312570] RIP: 0033:0x7f78615c1d82 [ 30.313032] 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 [ 30.315164] RSP: 002b:00007ffc4ba4a578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.316091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78615c1d82 [ 30.316967] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78609fb000 [ 30.317818] RBP: 00007f78609fb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.318658] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b00913bf70 [ 30.319500] R13: 00007ffc4ba4a590 R14: 00007ffc4ba4a5c0 R15: 00007ffc4ba4a920 [ 30.320368] [ 30.320661] [ 30.320879] Allocated by task 214: [ 30.321311] kasan_save_stack+0x22/0x50 [ 30.321821] kasan_set_track+0x25/0x30 [ 30.322328] __kasan_slab_alloc+0x59/0x70 [ 30.322862] kmem_cache_alloc+0x16b/0x370 [ 30.323384] vm_area_dup+0x20/0x160 [ 30.323845] __split_vma+0x170/0x950 [ 30.324332] split_vma+0xc6/0x110 [ 30.324772] mprotect_fixup+0x8d2/0xb30 [ 30.325271] do_mprotect_pkey+0x87e/0xd40 [ 30.325801] __x64_sys_mprotect+0x78/0xc0 [ 30.326323] do_syscall_64+0x3f/0x90 [ 30.326800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.327440] [ 30.327661] Freed by task 214: [ 30.328051] kasan_save_stack+0x22/0x50 [ 30.328560] kasan_set_track+0x25/0x30 [ 30.329053] kasan_save_free_info+0x2b/0x50 [ 30.329585] __kasan_slab_free+0x10a/0x190 [ 30.330119] kmem_cache_free+0x10d/0x4d0 [ 30.330631] rcu_core+0x8c8/0x2860 [ 30.331075] __do_softirq+0x1b7/0x7d4 [ 30.331549] [ 30.331767] Last potentially related work creation: [ 30.332368] kasan_save_stack+0x22/0x50 [ 30.332878] __kasan_record_aux_stack+0x8e/0xa0 [ 30.333450] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.334159] remove_vma+0x139/0x170 [ 30.334612] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.335176] do_vmi_munmap+0x1f1/0x2b0 [ 30.335661] __vm_munmap+0x138/0x3a0 [ 30.336133] __x64_sys_munmap+0x59/0x80 [ 30.336645] do_syscall_64+0x3f/0x90 [ 30.337125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337777] [ 30.337998] The buggy address belongs to the object at ffff88800e134488 [ 30.337998] which belongs to the cache vm_area_struct of size 168 [ 30.339474] The buggy address is located 88 bytes inside of [ 30.339474] freed 168-byte region [ffff88800e134488, ffff88800e134530) [ 30.340902] [ 30.341122] The buggy address belongs to the physical page: [ 30.341780] page:00000000b316199e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe134 [ 30.342856] memcg:ffff88800d51ed01 [ 30.343284] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.343928] page_type: 0xffffffff() [ 30.344387] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ee3c0 dead000000000008 [ 30.345303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d51ed01 [ 30.346215] page dumped because: kasan: bad access detected [ 30.346884] [ 30.347100] Memory state around the buggy address: [ 30.347686] ffff88800e134380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.348569] ffff88800e134400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.349421] >ffff88800e134480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.350272] ^ [ 30.351039] ffff88800e134500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.351901] ffff88800e134580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.352773] ================================================================== [ 30.353700] Disabling lock debugging due to kernel taint [ 32.560971] BUG: Bad rss-counter state mm:0000000032f2a699 type:MM_FILEPAGES val:33 [ 32.562379] BUG: Bad rss-counter state mm:0000000032f2a699 type:MM_ANONPAGES val:22 [ 33.103869] BUG: Bad rss-counter state mm:000000004b4c5e19 type:MM_FILEPAGES val:33 [ 33.104903] BUG: Bad rss-counter state mm:000000004b4c5e19 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32782' (ECDSA) to the list of known hosts. 2023/06/20 19:36:38 fuzzer started 2023/06/20 19:36:38 dialing manager at localhost:36067 2023/06/20 19:36:38 checking machine... 2023/06/20 19:36:38 checking revisions... [ 33.845739] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:36:38 testing simple program... [ 33.882619] cgroup: Unknown subsys name 'net' [ 33.927988] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:36:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015a9cc66 RSI=0000000000000001 RDI=ffff8880158f95e4 RBP=ffff8880158f8000 RSP=ffff88800ea67a10 R8 =ffff888015a9cc64 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888015a9b680 R13=0000000000000000 R14=ffff888015a9cc40 R15=ffff888015a9cc66 RIP=ffffffff8107f48f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6cba7ff700 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=00007f1d42920ca8 CR3=000000000d940000 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=36333a3931203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383931 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860aca3e RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860aca42 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000009789 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 00007fc8f4d60900 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=00007ffc0cceb000 CR3=000000000e9a8000 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=563412feff00545000000000000080fe 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