syzkaller login: [ 30.861939] BUG: Bad rss-counter state mm:000000009cfea579 type:MM_FILEPAGES val:33 [ 30.862957] BUG: Bad rss-counter state mm:000000009cfea579 type:MM_ANONPAGES val:22 [ 31.034547] ================================================================== [ 31.035674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.036824] Read of size 8 at addr ffff888015b3e228 by task sshd/221 [ 31.037596] [ 31.037810] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.038679] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.039724] Call Trace: [ 31.040044] [ 31.040361] dump_stack_lvl+0x91/0xf0 [ 31.040859] print_report+0xcc/0x620 [ 31.041359] ? __virt_addr_valid+0x102/0x340 [ 31.041904] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.042526] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.043139] kasan_report+0xbe/0xf0 [ 31.043669] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.044321] vma_interval_tree_remove+0xc75/0xec0 [ 31.044923] vma_prepare+0xc54/0x11a0 [ 31.045415] __split_vma+0x5af/0x950 [ 31.045880] ? __pfx___split_vma+0x10/0x10 [ 31.046419] ? find_held_lock+0x2c/0x110 [ 31.046945] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.047531] ? lock_is_held_type+0x9f/0x120 [ 31.048069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.048700] ? mtree_range_walk+0x632/0x900 [ 31.049288] ? mas_walk+0x5c7/0x7c0 [ 31.049774] do_vmi_munmap+0x1f1/0x2b0 [ 31.050287] mmap_region+0x1f9/0x2660 [ 31.050772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.051293] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.052013] ? __pfx_lock_acquire+0x10/0x10 [ 31.052565] ? __pfx_mmap_region+0x10/0x10 [ 31.053093] ? security_mmap_addr+0x7d/0xa0 [ 31.053630] ? get_unmapped_area+0x1f5/0x3f0 [ 31.054172] do_mmap+0x854/0xf00 [ 31.054627] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.055120] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.055712] ksys_mmap_pgoff+0x3af/0x500 [ 31.056227] do_syscall_64+0x3f/0x90 [ 31.056723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.057387] RIP: 0033:0x7f3c6c78fd82 [ 31.057840] 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 [ 31.059980] RSP: 002b:00007ffeed431388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.060896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c6c78fd82 [ 31.061746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c6bbc9000 [ 31.062601] RBP: 00007f3c6bbc9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.063455] R10: 0000000000000812 R11: 0000000000000206 R12: 000055efbf7ddec0 [ 31.064352] R13: 00007ffeed4313a0 R14: 00007ffeed4313d0 R15: 00007ffeed431730 [ 31.065218] [ 31.065512] [ 31.065725] Allocated by task 214: [ 31.066150] kasan_save_stack+0x22/0x50 [ 31.066667] kasan_set_track+0x25/0x30 [ 31.067160] __kasan_slab_alloc+0x59/0x70 [ 31.067715] kmem_cache_alloc+0x16b/0x370 [ 31.068251] vm_area_dup+0x20/0x160 [ 31.068710] __split_vma+0x170/0x950 [ 31.069174] split_vma+0xc6/0x110 [ 31.069636] mprotect_fixup+0x8d2/0xb30 [ 31.070144] do_mprotect_pkey+0x87e/0xd40 [ 31.070674] __x64_sys_mprotect+0x78/0xc0 [ 31.071199] do_syscall_64+0x3f/0x90 [ 31.071707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072379] [ 31.072592] Freed by task 214: [ 31.072983] kasan_save_stack+0x22/0x50 [ 31.073497] kasan_set_track+0x25/0x30 [ 31.073987] kasan_save_free_info+0x2b/0x50 [ 31.074534] __kasan_slab_free+0x10a/0x190 [ 31.075066] kmem_cache_free+0x10d/0x4d0 [ 31.075605] rcu_core+0x8c8/0x2860 [ 31.076049] __do_softirq+0x1b7/0x7d4 [ 31.076550] [ 31.076764] Last potentially related work creation: [ 31.077368] kasan_save_stack+0x22/0x50 [ 31.077947] __kasan_record_aux_stack+0x8e/0xa0 [ 31.078541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.079192] remove_vma+0x139/0x170 [ 31.079661] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.080232] do_vmi_munmap+0x1f1/0x2b0 [ 31.080733] __vm_munmap+0x138/0x3a0 [ 31.081216] __x64_sys_munmap+0x59/0x80 [ 31.081717] do_syscall_64+0x3f/0x90 [ 31.082199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.082842] [ 31.083058] The buggy address belongs to the object at ffff888015b3e1d0 [ 31.083058] which belongs to the cache vm_area_struct of size 168 [ 31.084566] The buggy address is located 88 bytes inside of [ 31.084566] freed 168-byte region [ffff888015b3e1d0, ffff888015b3e278) [ 31.085966] [ 31.086183] The buggy address belongs to the physical page: [ 31.086841] page:00000000616248cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b3e [ 31.087952] memcg:ffff888016627101 [ 31.088410] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.089047] page_type: 0xffffffff() [ 31.089522] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.090454] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016627101 [ 31.091362] page dumped because: kasan: bad access detected [ 31.092034] [ 31.092274] Memory state around the buggy address: [ 31.092846] ffff888015b3e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.093701] ffff888015b3e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.094580] >ffff888015b3e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.095457] ^ [ 31.096041] ffff888015b3e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.096924] ffff888015b3e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.097827] ================================================================== [ 31.098856] Disabling lock debugging due to kernel taint [ 33.015155] BUG: Bad rss-counter state mm:0000000016ad7924 type:MM_FILEPAGES val:33 [ 33.016310] BUG: Bad rss-counter state mm:0000000016ad7924 type:MM_ANONPAGES val:22 [ 33.506893] BUG: Bad rss-counter state mm:0000000016d89b7f type:MM_FILEPAGES val:33 [ 33.508094] BUG: Bad rss-counter state mm:0000000016d89b7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55271' (ECDSA) to the list of known hosts. 2023/06/20 15:25:37 fuzzer started 2023/06/20 15:25:37 dialing manager at localhost:36067 2023/06/20 15:25:37 checking machine... 2023/06/20 15:25:37 checking revisions... [ 34.210020] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:25:37 testing simple program... [ 34.258134] cgroup: Unknown subsys name 'net' [ 34.313743] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:25:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018c1fab0 RCX=0000000000000001 RDX=1ffff11003183f57 RSI=ffff888018c1ff18 RDI=ffff888018c1fab8 RBP=ffff888018c1ff18 RSP=ffff888018c1fa08 R8 =ffffffff863b3570 R9 =ffff888018c1faf0 R10=0000000000038001 R11=000000000008a95e R12=0000000000000008 R13=ffff888018c1faf8 R14=ffff888018c1ff20 R15=ffff888018c1fab0 RIP=ffffffff81130445 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 00007f49a56eb900 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=00007f49a5ca0650 CR3=000000001ca1c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f5df5dbd390 CR3=000000000c74a000 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=00000000000000000000000000000000 XMM01=ff75e75416167fa8d148bc7246d26b43 XMM02=2c67c8bc2e329bc3000000000011d310 XMM03=fb795ef6d657705600000000001219d8 XMM04=8e0ca55234539b0200000000000ae988 XMM05=e2e0ec02a37dafb600000000001322d0 XMM06=c291bd5c70af25b900000000001316f8 XMM07=e042d86d42eb936e0000000000121c58 XMM08=e0fa112b32f2e69a000000000011d370 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000