syzkaller login: [ 83.905376] BUG: Bad rss-counter state mm:0000000033c5904d type:MM_FILEPAGES val:33 [ 83.906358] BUG: Bad rss-counter state mm:0000000033c5904d type:MM_ANONPAGES val:22 [ 83.943476] ================================================================== [ 83.944548] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 83.945722] Read of size 8 at addr ffff88800d8603f8 by task sshd/220 [ 83.946792] [ 83.947027] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 83.947955] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 83.948994] Call Trace: [ 83.949338] [ 83.949645] dump_stack_lvl+0x91/0xf0 [ 83.950174] print_report+0xcc/0x620 [ 83.950693] ? __virt_addr_valid+0x102/0x340 [ 83.951281] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.951937] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.952610] kasan_report+0xbe/0xf0 [ 83.953136] ? vma_interval_tree_remove+0xc75/0xec0 [ 83.954108] vma_interval_tree_remove+0xc75/0xec0 [ 83.954760] vma_prepare+0xc54/0x11a0 [ 83.955291] __split_vma+0x5af/0x950 [ 83.955813] ? __pfx___split_vma+0x10/0x10 [ 83.956408] ? find_held_lock+0x2c/0x110 [ 83.956980] do_vmi_align_munmap+0x2ba/0x11f0 [ 83.957607] ? lock_is_held_type+0x9f/0x120 [ 83.958215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 83.958870] ? mtree_range_walk+0x632/0x900 [ 83.959461] ? mas_walk+0x5c7/0x7c0 [ 83.959968] do_vmi_munmap+0x1f1/0x2b0 [ 83.960501] mmap_region+0x1f9/0x2660 [ 83.961020] ? vm_mmap_pgoff+0x15c/0x3a0 [ 83.961570] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 83.962357] ? __pfx_lock_acquire+0x10/0x10 [ 83.962943] ? __pfx_mmap_region+0x10/0x10 [ 83.963528] ? security_mmap_addr+0x7d/0xa0 [ 83.964121] ? get_unmapped_area+0x1f5/0x3f0 [ 83.964728] do_mmap+0x854/0xf00 [ 83.965216] vm_mmap_pgoff+0x1a6/0x3a0 [ 83.965765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 83.966390] ksys_mmap_pgoff+0x3af/0x500 [ 83.966949] do_syscall_64+0x3f/0x90 [ 83.967467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.968170] RIP: 0033:0x7f51ce997d82 [ 83.968683] 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 [ 83.971038] RSP: 002b:00007ffe6106da98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 83.972047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f51ce997d82 [ 83.972991] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51cddd1000 [ 83.973933] RBP: 00007f51cddd1000 R08: 0000000000000009 R09: 0000000000001000 [ 83.974888] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bdbc294b20 [ 83.975831] R13: 00007ffe6106dab0 R14: 00007ffe6106dae0 R15: 00007ffe6106de40 [ 83.976776] [ 83.977105] [ 83.977340] Allocated by task 213: [ 83.977816] kasan_save_stack+0x22/0x50 [ 83.978378] kasan_set_track+0x25/0x30 [ 83.978928] __kasan_slab_alloc+0x59/0x70 [ 83.979510] kmem_cache_alloc+0x16b/0x370 [ 83.980074] vm_area_dup+0x20/0x160 [ 83.980576] __split_vma+0x170/0x950 [ 83.981100] split_vma+0xc6/0x110 [ 83.981596] mprotect_fixup+0x8d2/0xb30 [ 83.982154] do_mprotect_pkey+0x87e/0xd40 [ 83.982734] __x64_sys_mprotect+0x78/0xc0 [ 83.983317] do_syscall_64+0x3f/0x90 [ 83.983841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.984549] [ 83.984787] Freed by task 213: [ 83.985221] kasan_save_stack+0x22/0x50 [ 83.985779] kasan_set_track+0x25/0x30 [ 83.986343] kasan_save_free_info+0x2b/0x50 [ 83.986933] __kasan_slab_free+0x10a/0x190 [ 83.987535] kmem_cache_free+0x10d/0x4d0 [ 83.988095] rcu_core+0x8c8/0x2860 [ 83.988585] __do_softirq+0x1b7/0x7d4 [ 83.989113] [ 83.989353] Last potentially related work creation: [ 83.990016] kasan_save_stack+0x22/0x50 [ 83.990576] __kasan_record_aux_stack+0x8e/0xa0 [ 83.991210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 83.991925] remove_vma+0x139/0x170 [ 83.992422] do_vmi_align_munmap+0xd4a/0x11f0 [ 83.993037] do_vmi_munmap+0x1f1/0x2b0 [ 83.993570] __vm_munmap+0x138/0x3a0 [ 83.994104] __x64_sys_munmap+0x59/0x80 [ 83.994654] do_syscall_64+0x3f/0x90 [ 83.995182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 83.995897] [ 83.996136] The buggy address belongs to the object at ffff88800d8603a0 [ 83.996136] which belongs to the cache vm_area_struct of size 168 [ 83.997776] The buggy address is located 88 bytes inside of [ 83.997776] freed 168-byte region [ffff88800d8603a0, ffff88800d860448) [ 83.999397] [ 83.999639] The buggy address belongs to the physical page: [ 84.000374] page:0000000058803816 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd860 [ 84.001587] memcg:ffff88800ee83a01 [ 84.002079] flags: 0x100000000000200(slab|node=0|zone=1) [ 84.002792] page_type: 0xffffffff() [ 84.003293] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 84.004313] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee83a01 [ 84.005317] page dumped because: kasan: bad access detected [ 84.006049] [ 84.006291] Memory state around the buggy address: [ 84.006938] ffff88800d860280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 84.007892] ffff88800d860300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 84.008849] >ffff88800d860380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 84.009802] ^ [ 84.010739] ffff88800d860400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 84.011687] ffff88800d860480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 84.012633] ================================================================== [ 84.013780] Disabling lock debugging due to kernel taint [ 86.704963] BUG: Bad rss-counter state mm:00000000009a99c3 type:MM_FILEPAGES val:33 [ 86.706022] BUG: Bad rss-counter state mm:00000000009a99c3 type:MM_ANONPAGES val:22 [ 87.213725] BUG: Bad rss-counter state mm:00000000776bcbab type:MM_FILEPAGES val:33 [ 87.214909] BUG: Bad rss-counter state mm:00000000776bcbab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42578' (ECDSA) to the list of known hosts. 2023/06/19 20:45:59 fuzzer started 2023/06/19 20:46:00 dialing manager at localhost:44161 2023/06/19 20:46:00 checking machine... 2023/06/19 20:46:00 checking revisions... [ 87.920493] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:46:00 testing simple program... [ 87.972155] cgroup: Unknown subsys name 'net' [ 88.027357] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:45:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11001d94f0f RCX=0000000000000000 RDX=ffff888016e49b40 RSI=ffffffff81967ae3 RDI=ffff88800eca7898 RBP=0000000000000000 RSP=ffff88800eca7878 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffffffff854ee9e0 R14=ffff888008c2a050 R15=ffff888016e49b40 RIP=ffffffff81967b05 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 00007f6f8940d900 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=00007f6f899c2650 CR3=000000000c522000 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=0000000000000000 RBX=000000000000000e RCX=ffffffff818b909d RDX=ffff88800ff19b40 RSI=00000000c0045878 RDI=0000000000000005 RBP=ffffffff84904b60 RSP=ffff8880145efcf0 R8 =0000000000000005 R9 =00000000c0045877 R10=000000000000541b R11=0000000000000001 R12=000000000000541b R13=0000000000000005 R14=0000000000000011 R15=000000000000541b RIP=ffffffff814c0420 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 00007fb7c7e5e900 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=00007fb7c7270260 CR3=000000000d5e6000 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=b1654583a4279686bc432b3e6cf24f11 XMM02=ec2efd57dc4c00df000000000011d510 XMM03=ef23b2c28d57847f000000000011d5e0 XMM04=dfad78f225359ada00000000000ae988 XMM05=c657821c2b3e86590000000000135c58 XMM06=fe193fb9476fc0a400000000001349f8 XMM07=fb795ef6d65770560000000000124f08 XMM08=2c67c8bc2e329bc3000000000011d580 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000