syzkaller login: [ 54.262977] BUG: Bad rss-counter state mm:000000003604a1ea type:MM_FILEPAGES val:33 [ 54.264637] BUG: Bad rss-counter state mm:000000003604a1ea type:MM_ANONPAGES val:22 [ 54.428285] ================================================================== [ 54.429217] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.430144] Read of size 8 at addr ffff88800e490310 by task sshd/219 [ 54.430920] [ 54.431141] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.432089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.433063] Call Trace: [ 54.433406] [ 54.433688] dump_stack_lvl+0x91/0xf0 [ 54.434196] print_report+0xcc/0x620 [ 54.434689] ? __virt_addr_valid+0x102/0x340 [ 54.435242] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.435857] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.436472] kasan_report+0xbe/0xf0 [ 54.436952] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.437586] vma_interval_tree_remove+0xc75/0xec0 [ 54.438185] vma_prepare+0xc54/0x11a0 [ 54.438659] __split_vma+0x5af/0x950 [ 54.439126] ? __pfx___split_vma+0x10/0x10 [ 54.439649] ? find_held_lock+0x2c/0x110 [ 54.440168] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.440722] ? lock_is_held_type+0x9f/0x120 [ 54.441271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.441870] ? mtree_range_walk+0x632/0x900 [ 54.442420] ? mas_walk+0x5c7/0x7c0 [ 54.442892] do_vmi_munmap+0x1f1/0x2b0 [ 54.443378] mmap_region+0x1f9/0x2660 [ 54.443855] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.444361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.445068] ? __pfx_lock_acquire+0x10/0x10 [ 54.445622] ? __pfx_mmap_region+0x10/0x10 [ 54.446150] ? security_mmap_addr+0x7d/0xa0 [ 54.446672] ? get_unmapped_area+0x1f5/0x3f0 [ 54.447223] do_mmap+0x854/0xf00 [ 54.447657] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.448153] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.448708] ksys_mmap_pgoff+0x3af/0x500 [ 54.449216] do_syscall_64+0x3f/0x90 [ 54.449687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.450328] RIP: 0033:0x7f7f5fd8fd82 [ 54.450777] 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 [ 54.452882] RSP: 002b:00007ffd06eece58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.453785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f5fd8fd82 [ 54.454623] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f5f1c9000 [ 54.455464] RBP: 00007f7f5f1c9000 R08: 0000000000000009 R09: 0000000000001000 [ 54.456308] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bab9016ec0 [ 54.457170] R13: 00007ffd06eece70 R14: 00007ffd06eecea0 R15: 00007ffd06eed200 [ 54.458016] [ 54.458306] [ 54.458519] Allocated by task 212: [ 54.458953] kasan_save_stack+0x22/0x50 [ 54.459450] kasan_set_track+0x25/0x30 [ 54.459943] __kasan_slab_alloc+0x59/0x70 [ 54.460462] kmem_cache_alloc+0x16b/0x370 [ 54.460973] vm_area_dup+0x20/0x160 [ 54.461432] __split_vma+0x170/0x950 [ 54.461891] split_vma+0xc6/0x110 [ 54.462327] mprotect_fixup+0x8d2/0xb30 [ 54.462826] do_mprotect_pkey+0x87e/0xd40 [ 54.463345] __x64_sys_mprotect+0x78/0xc0 [ 54.463861] do_syscall_64+0x3f/0x90 [ 54.464327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.464953] [ 54.465168] Freed by task 212: [ 54.465554] kasan_save_stack+0x22/0x50 [ 54.466045] kasan_set_track+0x25/0x30 [ 54.466533] kasan_save_free_info+0x2b/0x50 [ 54.467055] __kasan_slab_free+0x10a/0x190 [ 54.467577] kmem_cache_free+0x10d/0x4d0 [ 54.468075] rcu_core+0x8c8/0x2860 [ 54.468512] __do_softirq+0x1b7/0x7d4 [ 54.468977] [ 54.469204] Last potentially related work creation: [ 54.469777] kasan_save_stack+0x22/0x50 [ 54.470274] __kasan_record_aux_stack+0x8e/0xa0 [ 54.470841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.471475] remove_vma+0x139/0x170 [ 54.471918] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.472470] do_vmi_munmap+0x1f1/0x2b0 [ 54.472944] __vm_munmap+0x138/0x3a0 [ 54.473408] __x64_sys_munmap+0x59/0x80 [ 54.473896] do_syscall_64+0x3f/0x90 [ 54.474356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.474989] [ 54.475201] The buggy address belongs to the object at ffff88800e4902b8 [ 54.475201] which belongs to the cache vm_area_struct of size 168 [ 54.476637] The buggy address is located 88 bytes inside of [ 54.476637] freed 168-byte region [ffff88800e4902b8, ffff88800e490360) [ 54.478013] [ 54.478225] The buggy address belongs to the physical page: [ 54.478867] page:000000006af258da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe490 [ 54.479933] memcg:ffff8880140fbd01 [ 54.480350] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.480981] page_type: 0xffffffff() [ 54.481439] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 54.482341] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140fbd01 [ 54.483229] page dumped because: kasan: bad access detected [ 54.483880] [ 54.484091] Memory state around the buggy address: [ 54.484663] ffff88800e490200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 54.485507] ffff88800e490280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 54.486361] >ffff88800e490300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 54.487207] ^ [ 54.487670] ffff88800e490380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 54.488512] ffff88800e490400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 54.489366] ================================================================== [ 54.490321] Disabling lock debugging due to kernel taint [ 56.558417] BUG: Bad rss-counter state mm:00000000cbd5135c type:MM_FILEPAGES val:33 [ 56.559596] BUG: Bad rss-counter state mm:00000000cbd5135c type:MM_ANONPAGES val:22 [ 57.134590] BUG: Bad rss-counter state mm:00000000d48ebae9 type:MM_FILEPAGES val:33 [ 57.135719] BUG: Bad rss-counter state mm:00000000d48ebae9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44503' (ECDSA) to the list of known hosts. 2023/06/19 23:14:14 fuzzer started 2023/06/19 23:14:15 dialing manager at localhost:44161 2023/06/19 23:14:15 checking machine... 2023/06/19 23:14:15 checking revisions... [ 57.740965] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:14:15 testing simple program... [ 57.782109] cgroup: Unknown subsys name 'net' [ 57.852756] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:13:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001679f09 RSI=ffffffff846000aa RDI=ffff88800b3cf7f0 RBP=ffff88800b3cf848 RSP=ffff88800b3cf780 R8 =0000000000000001 R9 =ffff88800b3cf830 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800b3cf8b8 R13=0000000000000000 R14=ffff888015ba51c0 R15=ffff88800b3cf7f0 RIP=ffffffff8113062c 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 00007f5ad1be7900 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=00007f5ad219f0b0 CR3=000000001bf12000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed10011caf92 RBX=0000000000000009 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=ffffffff81378294 RDI=ffffffff8560b520 RBP=1ffff110011caf92 RSP=ffff888008e57c80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000128 R12=ffffffff8560b520 R13=ffffffff81378294 R14=ffff88806cf35000 R15=ffff88800e830410 RIP=ffffffff812d8660 RFL=00000282 [--S----] 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=00007f417e8a5d60 CR3=0000000016548000 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=2034313a34313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000