syzkaller login: [ 31.112589] BUG: Bad rss-counter state mm:0000000019c3af97 type:MM_FILEPAGES val:33 [ 31.113683] BUG: Bad rss-counter state mm:0000000019c3af97 type:MM_ANONPAGES val:22 [ 31.275435] ================================================================== [ 31.276533] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.277645] Read of size 8 at addr ffff88801a107968 by task sshd/220 [ 31.278666] [ 31.278912] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.279791] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.280778] Call Trace: [ 31.281102] [ 31.281385] dump_stack_lvl+0x91/0xf0 [ 31.281878] print_report+0xcc/0x620 [ 31.282360] ? __virt_addr_valid+0x102/0x340 [ 31.282908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283520] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.284146] kasan_report+0xbe/0xf0 [ 31.284619] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285243] vma_interval_tree_remove+0xc75/0xec0 [ 31.285852] vma_prepare+0xc54/0x11a0 [ 31.286329] __split_vma+0x5af/0x950 [ 31.286802] ? __pfx___split_vma+0x10/0x10 [ 31.287328] ? find_held_lock+0x2c/0x110 [ 31.287877] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.288440] ? lock_is_held_type+0x9f/0x120 [ 31.288977] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.289584] ? mtree_range_walk+0x632/0x900 [ 31.290130] ? mas_walk+0x5c7/0x7c0 [ 31.290606] do_vmi_munmap+0x1f1/0x2b0 [ 31.291100] mmap_region+0x1f9/0x2660 [ 31.291579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.292094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.292797] ? __pfx_lock_acquire+0x10/0x10 [ 31.293326] ? __pfx_mmap_region+0x10/0x10 [ 31.293854] ? security_mmap_addr+0x7d/0xa0 [ 31.294389] ? get_unmapped_area+0x1f5/0x3f0 [ 31.294935] do_mmap+0x854/0xf00 [ 31.295378] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.295880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.296439] ksys_mmap_pgoff+0x3af/0x500 [ 31.296953] do_syscall_64+0x3f/0x90 [ 31.297428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298072] RIP: 0033:0x7fc96d051d82 [ 31.298530] 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 [ 31.300669] RSP: 002b:00007ffd14a88188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.301560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc96d051d82 [ 31.302401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc96c48b000 [ 31.303243] RBP: 00007fc96c48b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.304096] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecf0df0ec0 [ 31.304936] R13: 00007ffd14a881a0 R14: 00007ffd14a881d0 R15: 00007ffd14a88530 [ 31.305792] [ 31.306083] [ 31.306295] Allocated by task 213: [ 31.306728] kasan_save_stack+0x22/0x50 [ 31.307241] kasan_set_track+0x25/0x30 [ 31.307749] __kasan_slab_alloc+0x59/0x70 [ 31.308274] kmem_cache_alloc+0x16b/0x370 [ 31.308789] vm_area_dup+0x20/0x160 [ 31.309249] __split_vma+0x170/0x950 [ 31.309714] split_vma+0xc6/0x110 [ 31.310152] mprotect_fixup+0x8d2/0xb30 [ 31.310650] do_mprotect_pkey+0x87e/0xd40 [ 31.311170] __x64_sys_mprotect+0x78/0xc0 [ 31.311688] do_syscall_64+0x3f/0x90 [ 31.312182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312832] [ 31.313046] Freed by task 213: [ 31.313442] kasan_save_stack+0x22/0x50 [ 31.313943] kasan_set_track+0x25/0x30 [ 31.314434] kasan_save_free_info+0x2b/0x50 [ 31.314971] __kasan_slab_free+0x10a/0x190 [ 31.315503] kmem_cache_free+0x10d/0x4d0 [ 31.316027] rcu_core+0x8c8/0x2860 [ 31.316467] __do_softirq+0x1b7/0x7d4 [ 31.316941] [ 31.317157] Last potentially related work creation: [ 31.317742] kasan_save_stack+0x22/0x50 [ 31.318244] __kasan_record_aux_stack+0x8e/0xa0 [ 31.318819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.319467] remove_vma+0x139/0x170 [ 31.319921] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.320477] do_vmi_munmap+0x1f1/0x2b0 [ 31.320964] __vm_munmap+0x138/0x3a0 [ 31.321431] __x64_sys_munmap+0x59/0x80 [ 31.321931] do_syscall_64+0x3f/0x90 [ 31.322406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323051] [ 31.323269] The buggy address belongs to the object at ffff88801a107910 [ 31.323269] which belongs to the cache vm_area_struct of size 168 [ 31.324754] The buggy address is located 88 bytes inside of [ 31.324754] freed 168-byte region [ffff88801a107910, ffff88801a1079b8) [ 31.326181] [ 31.326404] The buggy address belongs to the physical page: [ 31.327079] page:000000003ca56e72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a107 [ 31.328217] memcg:ffff888016bf8c01 [ 31.328650] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.329306] page_type: 0xffffffff() [ 31.329763] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.330707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bf8c01 [ 31.331642] page dumped because: kasan: bad access detected [ 31.332350] [ 31.332579] Memory state around the buggy address: [ 31.333174] ffff88801a107800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.334068] ffff88801a107880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.334942] >ffff88801a107900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.335817] ^ [ 31.336612] ffff88801a107980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.337484] ffff88801a107a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.338346] ================================================================== [ 31.339334] Disabling lock debugging due to kernel taint [ 33.039116] BUG: Bad rss-counter state mm:0000000078df3a8a type:MM_FILEPAGES val:33 [ 33.039883] BUG: Bad rss-counter state mm:0000000078df3a8a type:MM_ANONPAGES val:22 [ 33.516811] BUG: Bad rss-counter state mm:00000000cdf0ec2c type:MM_FILEPAGES val:33 [ 33.517801] BUG: Bad rss-counter state mm:00000000cdf0ec2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28121' (ECDSA) to the list of known hosts. 2023/06/21 01:12:34 fuzzer started 2023/06/21 01:12:34 dialing manager at localhost:36067 2023/06/21 01:12:35 checking machine... 2023/06/21 01:12:35 checking revisions... [ 34.230022] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:12:35 testing simple program... [ 34.283444] cgroup: Unknown subsys name 'net' [ 34.319736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:12:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff888008d9f978 RSI=ffffffff8180c705 RDI=ffff888008d9f978 RBP=ffff888008d9fa10 RSP=ffff888008d9f960 R8 =ffffffff86138e90 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888008d9f978 RIP=ffffffff811305e8 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 0000000000000000 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=00007ffc44e7d000 CR3=0000000019f82000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007fd36d10f8a0 CR3=000000000d61e000 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=b8c0daecd60383930743c35595087936 XMM02=ec2efd57dc4c00df000000000011b300 XMM03=cee307c5f742465a000000000011b3d0 XMM04=7df84a119809149800000000000ae988 XMM05=19e9129bd510f2350000000000131f60 XMM06=4fda316b135da52b0000000000131de8 XMM07=e042d86d42eb936e00000000001222f8 XMM08=cee307c5f742465a000000000011b3d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000