syzkaller login: [ 30.566277] BUG: Bad rss-counter state mm:0000000066bdf2de type:MM_FILEPAGES val:33 [ 30.567471] BUG: Bad rss-counter state mm:0000000066bdf2de type:MM_ANONPAGES val:22 [ 30.608376] ================================================================== [ 30.609377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.610321] Read of size 8 at addr ffff888014565228 by task sshd/220 [ 30.611071] [ 30.611316] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.612181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.613163] Call Trace: [ 30.613478] [ 30.613761] dump_stack_lvl+0x91/0xf0 [ 30.614251] print_report+0xcc/0x620 [ 30.614738] ? __virt_addr_valid+0x102/0x340 [ 30.615299] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.615921] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.616551] kasan_report+0xbe/0xf0 [ 30.617027] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.617641] vma_interval_tree_remove+0xc75/0xec0 [ 30.618238] vma_prepare+0xc54/0x11a0 [ 30.618711] __split_vma+0x5af/0x950 [ 30.619182] ? __pfx___split_vma+0x10/0x10 [ 30.619711] ? find_held_lock+0x2c/0x110 [ 30.620219] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.620782] ? lock_is_held_type+0x9f/0x120 [ 30.621314] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.621912] ? mtree_range_walk+0x632/0x900 [ 30.622462] ? mas_walk+0x5c7/0x7c0 [ 30.622931] do_vmi_munmap+0x1f1/0x2b0 [ 30.623434] mmap_region+0x1f9/0x2660 [ 30.623916] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.624423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.625133] ? __pfx_lock_acquire+0x10/0x10 [ 30.625663] ? __pfx_mmap_region+0x10/0x10 [ 30.626192] ? security_mmap_addr+0x7d/0xa0 [ 30.626719] ? get_unmapped_area+0x1f5/0x3f0 [ 30.627267] do_mmap+0x854/0xf00 [ 30.627703] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.628192] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.628753] ksys_mmap_pgoff+0x3af/0x500 [ 30.629252] do_syscall_64+0x3f/0x90 [ 30.629736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.630376] RIP: 0033:0x7f8654517d82 [ 30.630827] 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 [ 30.632947] RSP: 002b:00007ffcae935a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.633849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8654517d82 [ 30.634783] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8653951000 [ 30.635640] RBP: 00007f8653951000 R08: 0000000000000009 R09: 0000000000001000 [ 30.636505] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562db2adcb20 [ 30.637364] R13: 00007ffcae935a30 R14: 00007ffcae935a60 R15: 00007ffcae935dc0 [ 30.638216] [ 30.638512] [ 30.638725] Allocated by task 213: [ 30.639174] kasan_save_stack+0x22/0x50 [ 30.639683] kasan_set_track+0x25/0x30 [ 30.640170] __kasan_slab_alloc+0x59/0x70 [ 30.640693] kmem_cache_alloc+0x16b/0x370 [ 30.641199] vm_area_dup+0x20/0x160 [ 30.641646] __split_vma+0x170/0x950 [ 30.642110] split_vma+0xc6/0x110 [ 30.642546] mprotect_fixup+0x8d2/0xb30 [ 30.643045] do_mprotect_pkey+0x87e/0xd40 [ 30.643576] __x64_sys_mprotect+0x78/0xc0 [ 30.644096] do_syscall_64+0x3f/0x90 [ 30.644566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.645197] [ 30.645409] Freed by task 213: [ 30.645797] kasan_save_stack+0x22/0x50 [ 30.646296] kasan_set_track+0x25/0x30 [ 30.646785] kasan_save_free_info+0x2b/0x50 [ 30.647317] __kasan_slab_free+0x10a/0x190 [ 30.647844] kmem_cache_free+0x10d/0x4d0 [ 30.648348] rcu_core+0x8c8/0x2860 [ 30.648783] __do_softirq+0x1b7/0x7d4 [ 30.649252] [ 30.649467] Last potentially related work creation: [ 30.650055] kasan_save_stack+0x22/0x50 [ 30.650554] __kasan_record_aux_stack+0x8e/0xa0 [ 30.651120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.651784] remove_vma+0x139/0x170 [ 30.652230] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.652781] do_vmi_munmap+0x1f1/0x2b0 [ 30.653269] __vm_munmap+0x138/0x3a0 [ 30.653733] __x64_sys_munmap+0x59/0x80 [ 30.654223] do_syscall_64+0x3f/0x90 [ 30.654689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.655331] [ 30.655543] The buggy address belongs to the object at ffff8880145651d0 [ 30.655543] which belongs to the cache vm_area_struct of size 168 [ 30.657000] The buggy address is located 88 bytes inside of [ 30.657000] freed 168-byte region [ffff8880145651d0, ffff888014565278) [ 30.658382] [ 30.658597] The buggy address belongs to the physical page: [ 30.659262] page:00000000223cdad2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14565 [ 30.660341] memcg:ffff88801a153301 [ 30.660764] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.661397] page_type: 0xffffffff() [ 30.661845] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.662751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a153301 [ 30.663666] page dumped because: kasan: bad access detected [ 30.664324] [ 30.664535] Memory state around the buggy address: [ 30.665109] ffff888014565100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.665947] ffff888014565180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.666804] >ffff888014565200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.667652] ^ [ 30.668207] ffff888014565280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.669069] ffff888014565300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.669920] ================================================================== [ 30.671025] Disabling lock debugging due to kernel taint [ 32.593655] BUG: Bad rss-counter state mm:000000000a68875f type:MM_FILEPAGES val:33 [ 32.594892] BUG: Bad rss-counter state mm:000000000a68875f type:MM_ANONPAGES val:22 [ 33.050607] BUG: Bad rss-counter state mm:00000000c2386a86 type:MM_FILEPAGES val:33 [ 33.051619] BUG: Bad rss-counter state mm:00000000c2386a86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57508' (ECDSA) to the list of known hosts. 2023/06/20 20:54:04 fuzzer started 2023/06/20 20:54:04 dialing manager at localhost:36067 2023/06/20 20:54:04 checking machine... 2023/06/20 20:54:04 checking revisions... [ 33.676983] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:54:04 testing simple program... [ 33.739613] cgroup: Unknown subsys name 'net' [ 33.784138] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:54:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002ba3ec8 RSI=ffffffff8185af33 RDI=ffff888015d1f6b0 RBP=ffff888015d1f680 RSP=ffff888015d1f5d8 R8 =0000000000000001 R9 =ffff888015d1f628 R10=0000000000038001 R11=00000000000223eb R12=ffff888015d1f6b0 R13=0000000000000000 R14=ffff888015ecd1c0 R15=0000000000092cc0 RIP=ffffffff813ad47f 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 00007f1269218900 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=00007f12697d00b0 CR3=0000000017f3c000 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=00007fe341b49510 CR3=00000000139ec000 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=914a771a16c0d7881647c08e80ab2a37 XMM02=000000000011aa00ec2efd57dc4c00df XMM03=0000000000121e686e305ec9691132e0 XMM04=d3860fd63986108900000000000ae988 XMM05=19e9129bd510f2350000000000131c30 XMM06=180b29567d89aaef0000000000130a98 XMM07=e042d86d42eb936e00000000001220e8 XMM08=6e305ec9691132e0000000000011aa60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000