syzkaller login: [ 35.552848] BUG: Bad rss-counter state mm:00000000a69db3ff type:MM_FILEPAGES val:33 [ 35.554132] BUG: Bad rss-counter state mm:00000000a69db3ff type:MM_ANONPAGES val:22 [ 35.590927] ================================================================== [ 35.591644] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.592382] Read of size 8 at addr ffff88800e9d0058 by task sshd/220 [ 35.592979] [ 35.593147] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.593832] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.594594] Call Trace: [ 35.594842] [ 35.595064] dump_stack_lvl+0x91/0xf0 [ 35.595448] print_report+0xcc/0x620 [ 35.595890] ? __virt_addr_valid+0x102/0x340 [ 35.596323] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.596804] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.597290] kasan_report+0xbe/0xf0 [ 35.597657] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.598138] vma_interval_tree_remove+0xc75/0xec0 [ 35.598605] vma_prepare+0xc54/0x11a0 [ 35.598981] __split_vma+0x5af/0x950 [ 35.599344] ? __pfx___split_vma+0x10/0x10 [ 35.599755] ? find_held_lock+0x2c/0x110 [ 35.600155] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.600596] ? lock_is_held_type+0x9f/0x120 [ 35.601015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.601505] ? mtree_range_walk+0x632/0x900 [ 35.601938] ? mas_walk+0x5c7/0x7c0 [ 35.602307] do_vmi_munmap+0x1f1/0x2b0 [ 35.602594] mmap_region+0x1f9/0x2660 [ 35.602881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.603177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.603615] ? __pfx_lock_acquire+0x10/0x10 [ 35.603935] ? __pfx_mmap_region+0x10/0x10 [ 35.604250] ? security_mmap_addr+0x7d/0xa0 [ 35.604576] ? get_unmapped_area+0x1f5/0x3f0 [ 35.604904] do_mmap+0x854/0xf00 [ 35.605168] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.605470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.605813] ksys_mmap_pgoff+0x3af/0x500 [ 35.606113] do_syscall_64+0x3f/0x90 [ 35.606388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.606781] RIP: 0033:0x7f3bb8966d82 [ 35.607054] 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 [ 35.608345] RSP: 002b:00007fffe574b738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.608885] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bb8966d82 [ 35.609403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bb7da0000 [ 35.609929] RBP: 00007f3bb7da0000 R08: 0000000000000009 R09: 0000000000001000 [ 35.610437] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d7c483b20 [ 35.610963] R13: 00007fffe574b750 R14: 00007fffe574b780 R15: 00007fffe574bae0 [ 35.611480] [ 35.611655] [ 35.611782] Allocated by task 213: [ 35.612046] kasan_save_stack+0x22/0x50 [ 35.612349] kasan_set_track+0x25/0x30 [ 35.612650] __kasan_slab_alloc+0x59/0x70 [ 35.612970] kmem_cache_alloc+0x16b/0x370 [ 35.613291] vm_area_dup+0x20/0x160 [ 35.613567] __split_vma+0x170/0x950 [ 35.613846] split_vma+0xc6/0x110 [ 35.614105] mprotect_fixup+0x8d2/0xb30 [ 35.614408] do_mprotect_pkey+0x87e/0xd40 [ 35.614718] __x64_sys_mprotect+0x78/0xc0 [ 35.615035] do_syscall_64+0x3f/0x90 [ 35.615321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.615705] [ 35.615832] Freed by task 13: [ 35.616060] kasan_save_stack+0x22/0x50 [ 35.616367] kasan_set_track+0x25/0x30 [ 35.616658] kasan_save_free_info+0x2b/0x50 [ 35.616979] __kasan_slab_free+0x10a/0x190 [ 35.617302] kmem_cache_free+0x10d/0x4d0 [ 35.617604] rcu_core+0x8c8/0x2860 [ 35.617872] __do_softirq+0x1b7/0x7d4 [ 35.618160] [ 35.618288] Last potentially related work creation: [ 35.618648] kasan_save_stack+0x22/0x50 [ 35.618947] __kasan_record_aux_stack+0x8e/0xa0 [ 35.619298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.619680] remove_vma+0x139/0x170 [ 35.619953] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.620290] do_vmi_munmap+0x1f1/0x2b0 [ 35.620575] __vm_munmap+0x138/0x3a0 [ 35.620856] __x64_sys_munmap+0x59/0x80 [ 35.621163] do_syscall_64+0x3f/0x90 [ 35.621450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.621831] [ 35.621960] The buggy address belongs to the object at ffff88800e9d0000 [ 35.621960] which belongs to the cache vm_area_struct of size 168 [ 35.622861] The buggy address is located 88 bytes inside of [ 35.622861] freed 168-byte region [ffff88800e9d0000, ffff88800e9d00a8) [ 35.623721] [ 35.623851] The buggy address belongs to the physical page: [ 35.624250] page:00000000bf2e9be0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9d0 [ 35.624899] memcg:ffff88800c849a01 [ 35.625159] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.625554] page_type: 0xffffffff() [ 35.625832] raw: 0100000000000200 ffff88800879fc80 ffffea00003ae040 dead000000000006 [ 35.626398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c849a01 [ 35.626952] page dumped because: kasan: bad access detected [ 35.627347] [ 35.627473] Memory state around the buggy address: [ 35.627826] ffff88800e9cff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 35.628342] ffff88800e9cff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.628872] >ffff88800e9d0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.629394] ^ [ 35.629833] ffff88800e9d0080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.630348] ffff88800e9d0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.630858] ================================================================== [ 35.631443] Disabling lock debugging due to kernel taint [ 37.326516] BUG: Bad rss-counter state mm:000000002ee2055d type:MM_FILEPAGES val:33 [ 37.327131] BUG: Bad rss-counter state mm:000000002ee2055d type:MM_ANONPAGES val:22 [ 37.709620] BUG: Bad rss-counter state mm:000000007a231367 type:MM_FILEPAGES val:33 [ 37.710277] BUG: Bad rss-counter state mm:000000007a231367 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65196' (ECDSA) to the list of known hosts. 2023/06/19 19:20:20 fuzzer started 2023/06/19 19:20:21 dialing manager at localhost:44161 2023/06/19 19:20:21 checking machine... 2023/06/19 19:20:21 checking revisions... [ 38.383003] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:20:21 testing simple program... [ 38.441020] cgroup: Unknown subsys name 'net' [ 38.503923] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:20:16 Registers: info registers vcpu 0 RAX=ffffffff863dc7b8 RBX=0000000000000001 RCX=ffffffff8386dfa9 RDX=0000000000000000 RSI=ffffffff863dc7b8 RDI=ffffffff85fc011c RBP=ffff88800c50f130 RSP=ffff88800c50f050 R8 =ffffffff863dc7b8 R9 =ffff88800c50f118 R10=0000000000038001 R11=0000000000091b52 R12=ffff88800c50f138 R13=ffff88800c50f120 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd RFL=00000286 [--S--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 00007f6adaed1900 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=00007fff47787000 CR3=00000000198d8000 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=00007f9cce099430 CR3=000000000cb40000 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=fb9b8e9e07d743b5244da262836f0bd5 XMM02=000000000011d1d0eff9b2d0a8fce9cb XMM03=000000000011d2a02c67c8bc2e329bc3 XMM04=ed5cbe6d680a6dd100000000000ae988 XMM05=19e9129bd510f23500000000001346c0 XMM06=12097de5673748300000000000133528 XMM07=e042d86d42eb936e0000000000124e40 XMM08=52769d4a50d048fb000000000011d2a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000