syzkaller login: [ 36.994317] BUG: Bad rss-counter state mm:00000000c637a33d type:MM_FILEPAGES val:33 [ 36.995088] BUG: Bad rss-counter state mm:00000000c637a33d type:MM_ANONPAGES val:22 [ 37.163198] ================================================================== [ 37.164320] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.165478] Read of size 8 at addr ffff8880158a5b38 by task sshd/220 [ 37.166387] [ 37.166607] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.167467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.168456] Call Trace: [ 37.168773] [ 37.169060] dump_stack_lvl+0x91/0xf0 [ 37.169557] print_report+0xcc/0x620 [ 37.170042] ? __virt_addr_valid+0x102/0x340 [ 37.170592] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.171204] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.171821] kasan_report+0xbe/0xf0 [ 37.172291] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.172916] vma_interval_tree_remove+0xc75/0xec0 [ 37.173534] vma_prepare+0xc54/0x11a0 [ 37.174015] __split_vma+0x5af/0x950 [ 37.174503] ? __pfx___split_vma+0x10/0x10 [ 37.175121] ? find_held_lock+0x2c/0x110 [ 37.175665] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.176258] ? lock_is_held_type+0x9f/0x120 [ 37.176822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.177481] ? mtree_range_walk+0x632/0x900 [ 37.178053] ? mas_walk+0x5c7/0x7c0 [ 37.178552] do_vmi_munmap+0x1f1/0x2b0 [ 37.179062] mmap_region+0x1f9/0x2660 [ 37.179569] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.180109] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.180850] ? __pfx_lock_acquire+0x10/0x10 [ 37.181411] ? __pfx_mmap_region+0x10/0x10 [ 37.181968] ? security_mmap_addr+0x7d/0xa0 [ 37.182516] ? get_unmapped_area+0x1f5/0x3f0 [ 37.183087] do_mmap+0x854/0xf00 [ 37.183541] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.184054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.184636] ksys_mmap_pgoff+0x3af/0x500 [ 37.185170] do_syscall_64+0x3f/0x90 [ 37.185666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.186333] RIP: 0033:0x7f3ef93d7d82 [ 37.186813] 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 [ 37.189046] RSP: 002b:00007ffe44ddc778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.190020] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ef93d7d82 [ 37.190913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ef8811000 [ 37.191799] RBP: 00007f3ef8811000 R08: 0000000000000009 R09: 0000000000001000 [ 37.192682] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fc8234d90 [ 37.193563] R13: 00007ffe44ddc790 R14: 00007ffe44ddc7c0 R15: 00007ffe44ddcb20 [ 37.194446] [ 37.194749] [ 37.194973] Allocated by task 213: [ 37.195419] kasan_save_stack+0x22/0x50 [ 37.195939] kasan_set_track+0x25/0x30 [ 37.196453] __kasan_slab_alloc+0x59/0x70 [ 37.196998] kmem_cache_alloc+0x16b/0x370 [ 37.197558] vm_area_dup+0x20/0x160 [ 37.198029] __split_vma+0x170/0x950 [ 37.198516] split_vma+0xc6/0x110 [ 37.198967] mprotect_fixup+0x8d2/0xb30 [ 37.199489] do_mprotect_pkey+0x87e/0xd40 [ 37.200040] __x64_sys_mprotect+0x78/0xc0 [ 37.200580] do_syscall_64+0x3f/0x90 [ 37.201070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.201749] [ 37.201972] Freed by task 213: [ 37.202377] kasan_save_stack+0x22/0x50 [ 37.202897] kasan_set_track+0x25/0x30 [ 37.203412] kasan_save_free_info+0x2b/0x50 [ 37.203959] __kasan_slab_free+0x10a/0x190 [ 37.204511] kmem_cache_free+0x10d/0x4d0 [ 37.205037] rcu_core+0x8c8/0x2860 [ 37.205514] __do_softirq+0x1b7/0x7d4 [ 37.206008] [ 37.206232] Last potentially related work creation: [ 37.206830] kasan_save_stack+0x22/0x50 [ 37.207343] __kasan_record_aux_stack+0x8e/0xa0 [ 37.207939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.208606] remove_vma+0x139/0x170 [ 37.209078] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.209678] do_vmi_munmap+0x1f1/0x2b0 [ 37.210180] __vm_munmap+0x138/0x3a0 [ 37.210680] __x64_sys_munmap+0x59/0x80 [ 37.211197] do_syscall_64+0x3f/0x90 [ 37.211692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.212361] [ 37.212584] The buggy address belongs to the object at ffff8880158a5ae0 [ 37.212584] which belongs to the cache vm_area_struct of size 168 [ 37.214113] The buggy address is located 88 bytes inside of [ 37.214113] freed 168-byte region [ffff8880158a5ae0, ffff8880158a5b88) [ 37.215568] [ 37.215801] The buggy address belongs to the physical page: [ 37.216493] page:0000000089588ea5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158a5 [ 37.217621] memcg:ffff88800dcffc01 [ 37.218069] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.218793] page_type: 0xffffffff() [ 37.219263] raw: 0100000000000200 ffff88800879fc80 ffffea0000381980 dead00000000000d [ 37.220220] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcffc01 [ 37.221198] page dumped because: kasan: bad access detected [ 37.221897] [ 37.222120] Memory state around the buggy address: [ 37.222717] ffff8880158a5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.223618] ffff8880158a5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 37.224514] >ffff8880158a5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.225461] ^ [ 37.226090] ffff8880158a5b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 37.226990] ffff8880158a5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.227853] ================================================================== [ 37.228834] Disabling lock debugging due to kernel taint [ 39.089643] BUG: Bad rss-counter state mm:000000006bd5fdc8 type:MM_FILEPAGES val:33 [ 39.091202] BUG: Bad rss-counter state mm:000000006bd5fdc8 type:MM_ANONPAGES val:22 [ 39.543263] BUG: Bad rss-counter state mm:0000000096ce1e40 type:MM_FILEPAGES val:33 [ 39.544212] BUG: Bad rss-counter state mm:0000000096ce1e40 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59709' (ECDSA) to the list of known hosts. 2023/06/19 22:26:02 fuzzer started 2023/06/19 22:26:02 dialing manager at localhost:44161 2023/06/19 22:26:02 checking machine... 2023/06/19 22:26:02 checking revisions... [ 40.293481] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:26:02 testing simple program... [ 40.340935] cgroup: Unknown subsys name 'net' [ 40.380153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:26:01 Registers: info registers vcpu 0 RAX=1ffffffff0bc1673 RBX=ffffffff85e0b398 RCX=ffffffff818e33b6 RDX=0000000000000000 RSI=ffffffff8614d354 RDI=ffffffff85e0b384 RBP=ffffffff85e0b384 RSP=ffff8880102df8f0 R8 =ffffffff8614d354 R9 =ffff8880102df9e8 R10=0000000000038001 R11=00000000000247ec R12=ffffffff85e0b3b0 R13=ffffffff85e0b384 R14=ffffffff85e0b384 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f5579a94900 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=00007fffb3d97000 CR3=000000000e75c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fc340707800 CR3=000000000c9e2000 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=8f4f3807cc4c5886034deee6bc617ae3 XMM02=2c67c8bc2e329bc3000000000011d8c0 XMM03=fb795ef6d65770560000000000124260 XMM04=f3fd1fb74ea61a8700000000000ae988 XMM05=879e1965603dd7580000000000134c58 XMM06=4fda316b135da52b0000000000133988 XMM07=e042d86d42eb936e0000000000124538 XMM08=5e78ee5b1ac22c19000000000011d920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000