syzkaller login: [ 31.145337] BUG: Bad rss-counter state mm:00000000267c074f type:MM_FILEPAGES val:33 [ 31.146766] BUG: Bad rss-counter state mm:00000000267c074f type:MM_ANONPAGES val:22 [ 31.305852] ================================================================== [ 31.306935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.308142] Read of size 8 at addr ffff888019863140 by task sshd/220 [ 31.308943] [ 31.309157] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.310044] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.311010] Call Trace: [ 31.311325] [ 31.311607] dump_stack_lvl+0x91/0xf0 [ 31.312103] print_report+0xcc/0x620 [ 31.312582] ? __virt_addr_valid+0x102/0x340 [ 31.313138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.313763] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.314374] kasan_report+0xbe/0xf0 [ 31.314859] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.315477] vma_interval_tree_remove+0xc75/0xec0 [ 31.316077] vma_prepare+0xc54/0x11a0 [ 31.316547] __split_vma+0x5af/0x950 [ 31.317018] ? __pfx___split_vma+0x10/0x10 [ 31.317565] ? find_held_lock+0x2c/0x110 [ 31.318082] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.318641] ? lock_is_held_type+0x9f/0x120 [ 31.319175] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.319771] ? mtree_range_walk+0x632/0x900 [ 31.320325] ? mas_walk+0x5c7/0x7c0 [ 31.320797] do_vmi_munmap+0x1f1/0x2b0 [ 31.321292] mmap_region+0x1f9/0x2660 [ 31.321771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.322282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.322989] ? __pfx_lock_acquire+0x10/0x10 [ 31.323517] ? __pfx_mmap_region+0x10/0x10 [ 31.324044] ? security_mmap_addr+0x7d/0xa0 [ 31.324571] ? get_unmapped_area+0x1f5/0x3f0 [ 31.325117] do_mmap+0x854/0xf00 [ 31.325576] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.326066] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.326623] ksys_mmap_pgoff+0x3af/0x500 [ 31.327126] do_syscall_64+0x3f/0x90 [ 31.327609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328258] RIP: 0033:0x7f4094f7ed82 [ 31.328708] 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 [ 31.330831] RSP: 002b:00007ffe49543c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.331729] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4094f7ed82 [ 31.332574] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40943b8000 [ 31.333426] RBP: 00007f40943b8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.334271] R10: 0000000000000812 R11: 0000000000000206 R12: 000056417660fec0 [ 31.335114] R13: 00007ffe49543c60 R14: 00007ffe49543c90 R15: 00007ffe49543ff0 [ 31.335998] [ 31.336308] [ 31.336525] Allocated by task 213: [ 31.336958] kasan_save_stack+0x22/0x50 [ 31.337457] kasan_set_track+0x25/0x30 [ 31.337921] __kasan_slab_alloc+0x59/0x70 [ 31.338417] kmem_cache_alloc+0x16b/0x370 [ 31.338907] vm_area_dup+0x20/0x160 [ 31.339338] __split_vma+0x170/0x950 [ 31.339784] split_vma+0xc6/0x110 [ 31.340205] mprotect_fixup+0x8d2/0xb30 [ 31.340685] do_mprotect_pkey+0x87e/0xd40 [ 31.341180] __x64_sys_mprotect+0x78/0xc0 [ 31.341685] do_syscall_64+0x3f/0x90 [ 31.342139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342744] [ 31.342948] Freed by task 213: [ 31.343320] kasan_save_stack+0x22/0x50 [ 31.343794] kasan_set_track+0x25/0x30 [ 31.344257] kasan_save_free_info+0x2b/0x50 [ 31.344764] __kasan_slab_free+0x10a/0x190 [ 31.345287] kmem_cache_free+0x10d/0x4d0 [ 31.345784] rcu_core+0x8c8/0x2860 [ 31.346216] __do_softirq+0x1b7/0x7d4 [ 31.346692] [ 31.346900] Last potentially related work creation: [ 31.347461] kasan_save_stack+0x22/0x50 [ 31.347954] __kasan_record_aux_stack+0x8e/0xa0 [ 31.348512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.349148] remove_vma+0x139/0x170 [ 31.349614] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.350166] do_vmi_munmap+0x1f1/0x2b0 [ 31.350641] __vm_munmap+0x138/0x3a0 [ 31.351096] __x64_sys_munmap+0x59/0x80 [ 31.351585] do_syscall_64+0x3f/0x90 [ 31.352055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.352685] [ 31.352894] The buggy address belongs to the object at ffff8880198630e8 [ 31.352894] which belongs to the cache vm_area_struct of size 168 [ 31.354286] The buggy address is located 88 bytes inside of [ 31.354286] freed 168-byte region [ffff8880198630e8, ffff888019863190) [ 31.355647] [ 31.355862] The buggy address belongs to the physical page: [ 31.356510] page:000000005b3c0073 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19863 [ 31.357582] memcg:ffff88800f1a5901 [ 31.357992] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.358626] page_type: 0xffffffff() [ 31.359065] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d7fc0 dead000000000002 [ 31.359973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1a5901 [ 31.360866] page dumped because: kasan: bad access detected [ 31.361535] [ 31.361742] Memory state around the buggy address: [ 31.362303] ffff888019863000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.363141] ffff888019863080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.363984] >ffff888019863100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.364819] ^ [ 31.365464] ffff888019863180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.366310] ffff888019863200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.367149] ================================================================== [ 31.368511] Disabling lock debugging due to kernel taint [ 33.536734] BUG: Bad rss-counter state mm:00000000153dabe5 type:MM_FILEPAGES val:33 [ 33.537678] BUG: Bad rss-counter state mm:00000000153dabe5 type:MM_ANONPAGES val:22 [ 33.990707] BUG: Bad rss-counter state mm:00000000d0e382d0 type:MM_FILEPAGES val:33 [ 33.991776] BUG: Bad rss-counter state mm:00000000d0e382d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2993' (ECDSA) to the list of known hosts. 2023/06/21 02:45:47 fuzzer started 2023/06/21 02:45:47 dialing manager at localhost:36067 2023/06/21 02:45:47 checking machine... 2023/06/21 02:45:47 checking revisions... [ 34.740524] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:45:48 testing simple program... [ 34.785818] cgroup: Unknown subsys name 'net' [ 34.858635] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001c84f54 RSI=ffffffff818e8d5a RDI=ffff88800e427aa0 RBP=ffff88800e427b38 RSP=ffff88800e427a78 R8 =0000000000000001 R9 =ffff88800e427ae0 R10=0000000000038001 R11=000000000002214d R12=ffff88800e427b68 R13=0000000000000000 R14=ffff888016589b40 R15=ffff88800e427aa0 RIP=ffffffff811305f0 RFL=00000212 [----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 00007fe70dce4900 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=00007fe70e29c0b0 CR3=0000000016606000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=000055ad01fb5000 CR3=000000000eed8000 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=2037343a35343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a35343a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000