syzkaller login: [ 30.818541] BUG: Bad rss-counter state mm:000000005eb2575c type:MM_FILEPAGES val:33 [ 30.819755] BUG: Bad rss-counter state mm:000000005eb2575c type:MM_ANONPAGES val:22 [ 30.858949] ================================================================== [ 30.860006] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.861075] Read of size 8 at addr ffff888015d0f5c8 by task sshd/219 [ 30.861966] [ 30.862189] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.863196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.864247] Call Trace: [ 30.864590] [ 30.864969] dump_stack_lvl+0x91/0xf0 [ 30.865628] print_report+0xcc/0x620 [ 30.866115] ? __virt_addr_valid+0x102/0x340 [ 30.866673] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867909] kasan_report+0xbe/0xf0 [ 30.868392] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.869004] vma_interval_tree_remove+0xc75/0xec0 [ 30.869626] vma_prepare+0xc54/0x11a0 [ 30.870112] __split_vma+0x5af/0x950 [ 30.870586] ? __pfx___split_vma+0x10/0x10 [ 30.871121] ? find_held_lock+0x2c/0x110 [ 30.871641] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.872203] ? lock_is_held_type+0x9f/0x120 [ 30.872743] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.873350] ? mtree_range_walk+0x632/0x900 [ 30.873912] ? mas_walk+0x5c7/0x7c0 [ 30.874392] do_vmi_munmap+0x1f1/0x2b0 [ 30.874886] mmap_region+0x1f9/0x2660 [ 30.875367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.875879] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.876600] ? __pfx_lock_acquire+0x10/0x10 [ 30.877130] ? __pfx_mmap_region+0x10/0x10 [ 30.877661] ? security_mmap_addr+0x7d/0xa0 [ 30.878189] ? get_unmapped_area+0x1f5/0x3f0 [ 30.878740] do_mmap+0x854/0xf00 [ 30.879190] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.879808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.880515] ksys_mmap_pgoff+0x3af/0x500 [ 30.881151] do_syscall_64+0x3f/0x90 [ 30.881772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882580] RIP: 0033:0x7fe22eef7d82 [ 30.883153] 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 [ 30.885832] RSP: 002b:00007fff07883668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.886971] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe22eef7d82 [ 30.888031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe22e331000 [ 30.889091] RBP: 00007fe22e331000 R08: 0000000000000009 R09: 0000000000001000 [ 30.890176] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d85ed53b20 [ 30.891242] R13: 00007fff07883680 R14: 00007fff078836b0 R15: 00007fff07883a10 [ 30.892313] [ 30.892677] [ 30.892945] Allocated by task 212: [ 30.893495] kasan_save_stack+0x22/0x50 [ 30.894151] kasan_set_track+0x25/0x30 [ 30.894770] __kasan_slab_alloc+0x59/0x70 [ 30.895423] kmem_cache_alloc+0x16b/0x370 [ 30.896063] vm_area_dup+0x20/0x160 [ 30.896625] __split_vma+0x170/0x950 [ 30.897205] split_vma+0xc6/0x110 [ 30.897775] mprotect_fixup+0x8d2/0xb30 [ 30.898400] do_mprotect_pkey+0x87e/0xd40 [ 30.899051] __x64_sys_mprotect+0x78/0xc0 [ 30.899702] do_syscall_64+0x3f/0x90 [ 30.900290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901194] [ 30.901461] Freed by task 212: [ 30.901980] kasan_save_stack+0x22/0x50 [ 30.902611] kasan_set_track+0x25/0x30 [ 30.903232] kasan_save_free_info+0x2b/0x50 [ 30.903899] __kasan_slab_free+0x10a/0x190 [ 30.904563] kmem_cache_free+0x10d/0x4d0 [ 30.905197] rcu_core+0x8c8/0x2860 [ 30.905767] __do_softirq+0x1b7/0x7d4 [ 30.906366] [ 30.906632] Last potentially related work creation: [ 30.907368] kasan_save_stack+0x22/0x50 [ 30.908001] __kasan_record_aux_stack+0x8e/0xa0 [ 30.908794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.909788] remove_vma+0x139/0x170 [ 30.910456] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.911119] do_vmi_munmap+0x1f1/0x2b0 [ 30.911690] __vm_munmap+0x138/0x3a0 [ 30.912243] __x64_sys_munmap+0x59/0x80 [ 30.912828] do_syscall_64+0x3f/0x90 [ 30.913388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914176] [ 30.914428] The buggy address belongs to the object at ffff888015d0f570 [ 30.914428] which belongs to the cache vm_area_struct of size 168 [ 30.916146] The buggy address is located 88 bytes inside of [ 30.916146] freed 168-byte region [ffff888015d0f570, ffff888015d0f618) [ 30.917827] [ 30.918079] The buggy address belongs to the physical page: [ 30.918861] page:00000000765b596a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d0f [ 30.920143] memcg:ffff888016b9c401 [ 30.920648] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.921404] page_type: 0xffffffff() [ 30.921958] raw: 0100000000000200 ffff88800879fc80 ffffea00005a7c00 0000000000000008 [ 30.923047] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b9c401 [ 30.924116] page dumped because: kasan: bad access detected [ 30.924898] [ 30.925148] Memory state around the buggy address: [ 30.925860] ffff888015d0f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.926875] ffff888015d0f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.927877] >ffff888015d0f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.928883] ^ [ 30.929685] ffff888015d0f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.930700] ffff888015d0f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.931706] ================================================================== [ 30.932795] Disabling lock debugging due to kernel taint [ 32.811048] BUG: Bad rss-counter state mm:00000000b0cd4366 type:MM_FILEPAGES val:33 [ 32.812025] BUG: Bad rss-counter state mm:00000000b0cd4366 type:MM_ANONPAGES val:22 [ 33.306474] BUG: Bad rss-counter state mm:00000000c7ce0120 type:MM_FILEPAGES val:33 [ 33.307621] BUG: Bad rss-counter state mm:00000000c7ce0120 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38004' (ECDSA) to the list of known hosts. 2023/06/20 06:18:27 fuzzer started 2023/06/20 06:18:27 dialing manager at localhost:44161 2023/06/20 06:18:27 checking machine... 2023/06/20 06:18:27 checking revisions... [ 34.041664] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:18:27 testing simple program... [ 34.087075] cgroup: Unknown subsys name 'net' [ 34.138720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:18:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=ffff8880102cd1c0 RSI=ffffffff814c83e7 RDI=ffffffff856528e0 RBP=00007f0025bfb19d RSP=ffff8880147673b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f0025bfb19d R13=0000000000000000 R14=ffff8880102cd1c0 R15=ffff888019a8c274 RIP=ffffffff8135bcf0 RFL=00000293 [--S-A-C] 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 00007f0025331900 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=00007f00247c0de0 CR3=000000000c41c000 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=ccd10d8fb462d6ac954193bd9d93cf66 XMM02=ec2efd57dc4c00df000000000011f920 XMM03=a14f7456a54dcd9c000000000011f9f0 XMM04=3fe1713ff34686e700000000000ae988 XMM05=8fedb58b4b40d3d70000000000134ae0 XMM06=dfcdbad4f1609c370000000000133c28 XMM07=fb795ef6d65770560000000000124130 XMM08=2c67c8bc2e329bc3000000000011f990 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc0738 RBX=ffffffff85e039c4 RCX=ffffffff8186bab7 RDX=0000000000000000 RSI=ffffffff86141c90 RDI=ffffffff85e039ac RBP=ffffffff85e039c4 RSP=ffff8880183a7928 R8 =ffffffff86141c90 R9 =ffff8880183a7a20 R10=0000000000038001 R11=0000000000022976 R12=ffffffff85e039c8 R13=ffffffff85e039ac R14=ffffffff85e039c0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007ff739fd3900 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=00007ff73a58a618 CR3=000000000eef4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000