syzkaller login: [ 30.848617] BUG: Bad rss-counter state mm:00000000ea5aa928 type:MM_FILEPAGES val:33 [ 30.849806] BUG: Bad rss-counter state mm:00000000ea5aa928 type:MM_ANONPAGES val:22 [ 30.888174] ================================================================== [ 30.888928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.889688] Read of size 8 at addr ffff8880102c9880 by task sshd/220 [ 30.890295] [ 30.890443] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.891125] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.891860] Call Trace: [ 30.892076] [ 30.892278] dump_stack_lvl+0x91/0xf0 [ 30.892619] print_report+0xcc/0x620 [ 30.893067] ? __virt_addr_valid+0x102/0x340 [ 30.893453] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893959] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.894401] kasan_report+0xbe/0xf0 [ 30.894800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895308] vma_interval_tree_remove+0xc75/0xec0 [ 30.895751] vma_prepare+0xc54/0x11a0 [ 30.896101] __split_vma+0x5af/0x950 [ 30.896425] ? __pfx___split_vma+0x10/0x10 [ 30.896791] ? find_held_lock+0x2c/0x110 [ 30.897264] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.897677] ? lock_is_held_type+0x9f/0x120 [ 30.898051] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.898470] ? mtree_range_walk+0x632/0x900 [ 30.898860] ? mas_walk+0x5c7/0x7c0 [ 30.899197] do_vmi_munmap+0x1f1/0x2b0 [ 30.899564] mmap_region+0x1f9/0x2660 [ 30.899990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.900349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.900836] ? __pfx_lock_acquire+0x10/0x10 [ 30.901295] ? __pfx_mmap_region+0x10/0x10 [ 30.901741] ? security_mmap_addr+0x7d/0xa0 [ 30.902157] ? get_unmapped_area+0x1f5/0x3f0 [ 30.902538] do_mmap+0x854/0xf00 [ 30.902897] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.903273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.903706] ksys_mmap_pgoff+0x3af/0x500 [ 30.904072] do_syscall_64+0x3f/0x90 [ 30.904465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904969] RIP: 0033:0x7f3f6cbf9d82 [ 30.905284] 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 [ 30.906746] RSP: 002b:00007ffd05e37528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.907383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f6cbf9d82 [ 30.907969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f6c033000 [ 30.908557] RBP: 00007f3f6c033000 R08: 0000000000000009 R09: 0000000000001000 [ 30.909143] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f5d963ec0 [ 30.909724] R13: 00007ffd05e37540 R14: 00007ffd05e37570 R15: 00007ffd05e378d0 [ 30.910319] [ 30.910521] [ 30.910682] Allocated by task 213: [ 30.910984] kasan_save_stack+0x22/0x50 [ 30.911331] kasan_set_track+0x25/0x30 [ 30.911661] __kasan_slab_alloc+0x59/0x70 [ 30.912009] kmem_cache_alloc+0x16b/0x370 [ 30.912349] vm_area_dup+0x20/0x160 [ 30.912653] __split_vma+0x170/0x950 [ 30.912961] split_vma+0xc6/0x110 [ 30.913250] mprotect_fixup+0x8d2/0xb30 [ 30.913600] do_mprotect_pkey+0x87e/0xd40 [ 30.913958] __x64_sys_mprotect+0x78/0xc0 [ 30.914314] do_syscall_64+0x3f/0x90 [ 30.914644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915086] [ 30.915241] Freed by task 213: [ 30.915522] kasan_save_stack+0x22/0x50 [ 30.915876] kasan_set_track+0x25/0x30 [ 30.916217] kasan_save_free_info+0x2b/0x50 [ 30.916585] __kasan_slab_free+0x10a/0x190 [ 30.916952] kmem_cache_free+0x10d/0x4d0 [ 30.917307] rcu_core+0x8c8/0x2860 [ 30.917617] __do_softirq+0x1b7/0x7d4 [ 30.917953] [ 30.918117] Last potentially related work creation: [ 30.918525] kasan_save_stack+0x22/0x50 [ 30.919065] __kasan_record_aux_stack+0x8e/0xa0 [ 30.919668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.920419] remove_vma+0x139/0x170 [ 30.921009] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.921730] do_vmi_munmap+0x1f1/0x2b0 [ 30.922349] __vm_munmap+0x138/0x3a0 [ 30.923013] __x64_sys_munmap+0x59/0x80 [ 30.923699] do_syscall_64+0x3f/0x90 [ 30.924367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925236] [ 30.925463] The buggy address belongs to the object at ffff8880102c9828 [ 30.925463] which belongs to the cache vm_area_struct of size 168 [ 30.927011] The buggy address is located 88 bytes inside of [ 30.927011] freed 168-byte region [ffff8880102c9828, ffff8880102c98d0) [ 30.928480] [ 30.928705] The buggy address belongs to the physical page: [ 30.929384] page:000000005cbc5576 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102c9 [ 30.930518] memcg:ffff888016954d01 [ 30.930967] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.931638] page_type: 0xffffffff() [ 30.932101] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.933052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016954d01 [ 30.933998] page dumped because: kasan: bad access detected [ 30.934743] [ 30.934972] Memory state around the buggy address: [ 30.935577] ffff8880102c9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.936466] ffff8880102c9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.937347] >ffff8880102c9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.938221] ^ [ 30.938653] ffff8880102c9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.939539] ffff8880102c9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.940415] ================================================================== [ 30.941496] Disabling lock debugging due to kernel taint [ 33.165989] BUG: Bad rss-counter state mm:0000000070d74172 type:MM_FILEPAGES val:33 [ 33.167648] BUG: Bad rss-counter state mm:0000000070d74172 type:MM_ANONPAGES val:22 [ 33.622984] BUG: Bad rss-counter state mm:000000004f90d254 type:MM_FILEPAGES val:33 [ 33.624037] BUG: Bad rss-counter state mm:000000004f90d254 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17560' (ECDSA) to the list of known hosts. 2023/06/19 13:07:16 fuzzer started 2023/06/19 13:07:16 dialing manager at localhost:44161 2023/06/19 13:07:16 checking machine... 2023/06/19 13:07:16 checking revisions... [ 34.360471] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:07:16 testing simple program... [ 34.403984] cgroup: Unknown subsys name 'net' [ 34.462277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:07:15 Registers: info registers vcpu 0 RAX=00000000000000e8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800cf17301 RSI=ffff88800cf173a8 RDI=ffff88800cf173a8 RBP=ffff88800cf17368 RSP=ffff88800cf17248 R8 =0000000000000001 R9 =ffff88800cf17350 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800cf17370 R13=ffff88800cf17358 R14=ffff88800cf173a8 R15=ffff88800cf17310 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007f3dde6ff900 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=00007fff3ac38000 CR3=000000000b844000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007efd88315c10 CR3=000000000ebe2000 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=2035313a37303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000