syzkaller login: [ 30.828730] BUG: Bad rss-counter state mm:00000000be4c7afb type:MM_FILEPAGES val:33 [ 30.830172] BUG: Bad rss-counter state mm:00000000be4c7afb type:MM_ANONPAGES val:22 [ 30.875644] ================================================================== [ 30.876702] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.877627] Read of size 8 at addr ffff888016336a50 by task sshd/220 [ 30.878404] [ 30.878626] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.879479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.880438] Call Trace: [ 30.880754] [ 30.881038] dump_stack_lvl+0x91/0xf0 [ 30.881532] print_report+0xcc/0x620 [ 30.882011] ? __virt_addr_valid+0x102/0x340 [ 30.882560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.883189] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.883795] kasan_report+0xbe/0xf0 [ 30.884278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.884894] vma_interval_tree_remove+0xc75/0xec0 [ 30.885495] vma_prepare+0xc54/0x11a0 [ 30.885969] __split_vma+0x5af/0x950 [ 30.886439] ? __pfx___split_vma+0x10/0x10 [ 30.886964] ? find_held_lock+0x2c/0x110 [ 30.887719] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.888427] ? lock_is_held_type+0x9f/0x120 [ 30.889104] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.889843] ? mtree_range_walk+0x632/0x900 [ 30.890519] ? mas_walk+0x5c7/0x7c0 [ 30.891115] do_vmi_munmap+0x1f1/0x2b0 [ 30.891762] mmap_region+0x1f9/0x2660 [ 30.892360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.892991] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.893868] ? __pfx_lock_acquire+0x10/0x10 [ 30.894526] ? __pfx_mmap_region+0x10/0x10 [ 30.895192] ? security_mmap_addr+0x7d/0xa0 [ 30.895851] ? get_unmapped_area+0x1f5/0x3f0 [ 30.896531] do_mmap+0x854/0xf00 [ 30.897073] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.897684] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.898380] ksys_mmap_pgoff+0x3af/0x500 [ 30.899005] do_syscall_64+0x3f/0x90 [ 30.899610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900418] RIP: 0033:0x7fbc0a36cd82 [ 30.900986] 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 [ 30.903645] RSP: 002b:00007fffd0c561d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.904629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc0a36cd82 [ 30.905484] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc097a6000 [ 30.906322] RBP: 00007fbc097a6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.907191] R10: 0000000000000812 R11: 0000000000000206 R12: 00005568b3e32ec0 [ 30.908036] R13: 00007fffd0c561f0 R14: 00007fffd0c56220 R15: 00007fffd0c56580 [ 30.908890] [ 30.909179] [ 30.909395] Allocated by task 213: [ 30.909828] kasan_save_stack+0x22/0x50 [ 30.910334] kasan_set_track+0x25/0x30 [ 30.910823] __kasan_slab_alloc+0x59/0x70 [ 30.911381] kmem_cache_alloc+0x16b/0x370 [ 30.911892] vm_area_dup+0x20/0x160 [ 30.912352] __split_vma+0x170/0x950 [ 30.912819] split_vma+0xc6/0x110 [ 30.913272] mprotect_fixup+0x8d2/0xb30 [ 30.913778] do_mprotect_pkey+0x87e/0xd40 [ 30.914312] __x64_sys_mprotect+0x78/0xc0 [ 30.914838] do_syscall_64+0x3f/0x90 [ 30.915328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.915970] [ 30.916183] Freed by task 213: [ 30.916576] kasan_save_stack+0x22/0x50 [ 30.917135] kasan_set_track+0x25/0x30 [ 30.917628] kasan_save_free_info+0x2b/0x50 [ 30.918165] __kasan_slab_free+0x10a/0x190 [ 30.918710] kmem_cache_free+0x10d/0x4d0 [ 30.919252] rcu_core+0x8c8/0x2860 [ 30.919700] __do_softirq+0x1b7/0x7d4 [ 30.920196] [ 30.920414] Last potentially related work creation: [ 30.921009] kasan_save_stack+0x22/0x50 [ 30.921517] __kasan_record_aux_stack+0x8e/0xa0 [ 30.922087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.922739] remove_vma+0x139/0x170 [ 30.923194] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.923754] do_vmi_munmap+0x1f1/0x2b0 [ 30.924246] __vm_munmap+0x138/0x3a0 [ 30.924729] __x64_sys_munmap+0x59/0x80 [ 30.925228] do_syscall_64+0x3f/0x90 [ 30.925715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926372] [ 30.926593] The buggy address belongs to the object at ffff8880163369f8 [ 30.926593] which belongs to the cache vm_area_struct of size 168 [ 30.928146] The buggy address is located 88 bytes inside of [ 30.928146] freed 168-byte region [ffff8880163369f8, ffff888016336aa0) [ 30.929655] [ 30.929885] The buggy address belongs to the physical page: [ 30.930592] page:00000000d27efea6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16336 [ 30.931771] memcg:ffff88801a3ffd01 [ 30.932219] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.932896] page_type: 0xffffffff() [ 30.933374] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.934337] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3ffd01 [ 30.935315] page dumped because: kasan: bad access detected [ 30.936018] [ 30.936245] Memory state around the buggy address: [ 30.936850] ffff888016336900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.937748] ffff888016336980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.938651] >ffff888016336a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.939591] ^ [ 30.940334] ffff888016336a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.941237] ffff888016336b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.942151] ================================================================== [ 30.943253] Disabling lock debugging due to kernel taint [ 33.204471] BUG: Bad rss-counter state mm:00000000019b6959 type:MM_FILEPAGES val:33 [ 33.205459] BUG: Bad rss-counter state mm:00000000019b6959 type:MM_ANONPAGES val:22 [ 33.773979] BUG: Bad rss-counter state mm:0000000085833021 type:MM_FILEPAGES val:33 [ 33.775285] BUG: Bad rss-counter state mm:0000000085833021 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50849' (ECDSA) to the list of known hosts. 2023/06/20 14:33:11 fuzzer started 2023/06/20 14:33:11 dialing manager at localhost:36067 2023/06/20 14:33:11 checking machine... 2023/06/20 14:33:11 checking revisions... [ 34.473809] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:33:11 testing simple program... [ 34.526781] cgroup: Unknown subsys name 'net' [ 34.592173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:33:11 Registers: info registers vcpu 0 RAX=fffffffffe4e5cef RBX=ffffffff86051f28 RCX=ffffffff84537da6 RDX=0000000000000000 RSI=ffffffff864b6d1e RDI=ffffffff86051f28 RBP=ffffffff86051f28 RSP=ffff88806ce099e0 R8 =ffffffff864b6d1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffffffff86051f28 R13=ffffffff86051f28 R14=ffffffff86051f28 R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f06e72f7900 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=00007f06e78ac650 CR3=0000000016d94000 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8120686e RDX=0000000000002068 RSI=0000000000002068 RDI=ffffffff864f1b90 RBP=ffff888008e379d0 RSP=ffff888008e37908 R8 =0000000000000000 R9 =ffff888008e379b8 R10=0000000000038001 R11=000000000000a20c R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e379b9 R15=ffff888008e37978 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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=00007ff817bfa000 CR3=0000000013a14000 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=37cbe8bc22234e8ef54c6d089b79a6a1 XMM02=ec2efd57dc4c00df000000000011a8a8 XMM03=5f556fc0998d7c82000000000011a978 XMM04=6d5ffbdb123f82e900000000000ae988 XMM05=9d3fb33e8837143e0000000000132e38 XMM06=19e9129bd510f2350000000000131cd0 XMM07=fb795ef6d65770560000000000121e58 XMM08=2c67c8bc2e329bc3000000000011a918 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000