syzkaller login: [ 60.050450] BUG: Bad rss-counter state mm:000000006aea7baf type:MM_FILEPAGES val:33 [ 60.051720] BUG: Bad rss-counter state mm:000000006aea7baf type:MM_ANONPAGES val:22 [ 60.192894] ================================================================== [ 60.193795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.194720] Read of size 8 at addr ffff88801015f6b0 by task sshd/219 [ 60.195486] [ 60.195800] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.196657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.197622] Call Trace: [ 60.197987] [ 60.198273] dump_stack_lvl+0x91/0xf0 [ 60.198761] print_report+0xcc/0x620 [ 60.199240] ? __virt_addr_valid+0x102/0x340 [ 60.199789] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.200401] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.201008] kasan_report+0xbe/0xf0 [ 60.201476] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.202109] vma_interval_tree_remove+0xc75/0xec0 [ 60.202739] vma_prepare+0xc54/0x11a0 [ 60.203239] __split_vma+0x5af/0x950 [ 60.203733] ? __pfx___split_vma+0x10/0x10 [ 60.204288] ? find_held_lock+0x2c/0x110 [ 60.204836] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.205420] ? lock_is_held_type+0x9f/0x120 [ 60.205996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.206627] ? mtree_range_walk+0x632/0x900 [ 60.207204] ? mas_walk+0x5c7/0x7c0 [ 60.207701] do_vmi_munmap+0x1f1/0x2b0 [ 60.208212] mmap_region+0x1f9/0x2660 [ 60.208716] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.209243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.210004] ? __pfx_lock_acquire+0x10/0x10 [ 60.210547] ? __pfx_mmap_region+0x10/0x10 [ 60.211095] ? security_mmap_addr+0x7d/0xa0 [ 60.211643] ? get_unmapped_area+0x1f5/0x3f0 [ 60.212211] do_mmap+0x854/0xf00 [ 60.212666] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.213174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.213770] ksys_mmap_pgoff+0x3af/0x500 [ 60.214296] do_syscall_64+0x3f/0x90 [ 60.214791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.215469] RIP: 0033:0x7fa84498ed82 [ 60.215958] 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 [ 60.218088] RSP: 002b:00007ffe2389a0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.218991] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa84498ed82 [ 60.219824] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa843dc8000 [ 60.220668] RBP: 00007fa843dc8000 R08: 0000000000000009 R09: 0000000000001000 [ 60.221514] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556cbb4daec0 [ 60.222367] R13: 00007ffe2389a110 R14: 00007ffe2389a140 R15: 00007ffe2389a4a0 [ 60.223236] [ 60.223531] [ 60.223746] Allocated by task 212: [ 60.224176] kasan_save_stack+0x22/0x50 [ 60.224691] kasan_set_track+0x25/0x30 [ 60.225181] __kasan_slab_alloc+0x59/0x70 [ 60.225716] kmem_cache_alloc+0x16b/0x370 [ 60.226227] vm_area_dup+0x20/0x160 [ 60.226692] __split_vma+0x170/0x950 [ 60.227158] split_vma+0xc6/0x110 [ 60.227601] mprotect_fixup+0x8d2/0xb30 [ 60.228106] do_mprotect_pkey+0x87e/0xd40 [ 60.228619] __x64_sys_mprotect+0x78/0xc0 [ 60.229139] do_syscall_64+0x3f/0x90 [ 60.229606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.230260] [ 60.230472] Freed by task 212: [ 60.230857] kasan_save_stack+0x22/0x50 [ 60.231356] kasan_set_track+0x25/0x30 [ 60.231842] kasan_save_free_info+0x2b/0x50 [ 60.232365] __kasan_slab_free+0x10a/0x190 [ 60.232898] kmem_cache_free+0x10d/0x4d0 [ 60.233406] rcu_core+0x8c8/0x2860 [ 60.233861] __do_softirq+0x1b7/0x7d4 [ 60.234334] [ 60.234549] Last potentially related work creation: [ 60.235126] kasan_save_stack+0x22/0x50 [ 60.235627] __kasan_record_aux_stack+0x8e/0xa0 [ 60.236199] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.236837] remove_vma+0x139/0x170 [ 60.237285] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.237854] do_vmi_munmap+0x1f1/0x2b0 [ 60.238336] __vm_munmap+0x138/0x3a0 [ 60.238795] __x64_sys_munmap+0x59/0x80 [ 60.239283] do_syscall_64+0x3f/0x90 [ 60.239752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.240396] [ 60.240613] Second to last potentially related work creation: [ 60.241285] kasan_save_stack+0x22/0x50 [ 60.241806] __kasan_record_aux_stack+0x8e/0xa0 [ 60.242374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.243007] remove_vma+0x139/0x170 [ 60.243454] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.244005] do_vmi_munmap+0x1f1/0x2b0 [ 60.244489] mmap_region+0x1f9/0x2660 [ 60.244960] do_mmap+0x854/0xf00 [ 60.245388] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.245876] ksys_mmap_pgoff+0x3af/0x500 [ 60.246369] do_syscall_64+0x3f/0x90 [ 60.246837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.247480] [ 60.247694] The buggy address belongs to the object at ffff88801015f658 [ 60.247694] which belongs to the cache vm_area_struct of size 168 [ 60.249144] The buggy address is located 88 bytes inside of [ 60.249144] freed 168-byte region [ffff88801015f658, ffff88801015f700) [ 60.250555] [ 60.250769] The buggy address belongs to the physical page: [ 60.251429] page:0000000069d16462 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1015f [ 60.252509] memcg:ffff88800d2da301 [ 60.252928] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.253617] page_type: 0xffffffff() [ 60.254073] raw: 0100000000000200 ffff8880087a0c80 ffffea000039d740 dead000000000005 [ 60.254989] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2da301 [ 60.255894] page dumped because: kasan: bad access detected [ 60.256542] [ 60.256755] Memory state around the buggy address: [ 60.257333] ffff88801015f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.258193] ffff88801015f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.259047] >ffff88801015f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.259892] ^ [ 60.260465] ffff88801015f700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 60.261310] ffff88801015f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 60.262165] ================================================================== [ 60.263134] Disabling lock debugging due to kernel taint [ 62.161500] BUG: Bad rss-counter state mm:0000000085d6eb6e type:MM_FILEPAGES val:33 [ 62.162775] BUG: Bad rss-counter state mm:0000000085d6eb6e type:MM_ANONPAGES val:22 [ 62.771984] BUG: Bad rss-counter state mm:00000000cf6b381e type:MM_FILEPAGES val:33 [ 62.773138] BUG: Bad rss-counter state mm:00000000cf6b381e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41344' (ECDSA) to the list of known hosts. 2023/06/20 12:45:58 fuzzer started 2023/06/20 12:45:58 dialing manager at localhost:36067 2023/06/20 12:45:58 checking machine... 2023/06/20 12:45:58 checking revisions... [ 63.416385] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:45:58 testing simple program... [ 63.478865] cgroup: Unknown subsys name 'net' [ 63.538572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801017fac8 RCX=0000000000000001 RDX=1ffff1100202ff5a RSI=ffffffff8363b743 RDI=ffff88801017fad0 RBP=0000000000000007 RSP=ffff88801017f9e0 R8 =0000000000000001 R9 =ffff88801017fa40 R10=0000000000038001 R11=000000000008a95e R12=ffff88801017fac8 R13=0000000000000000 R14=ffff888015df8000 R15=ffff888016c975f0 RIP=ffffffff813ad4be 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 00007f87fe0fa900 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=00007ffee76e2000 CR3=000000000e2ae000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f41d7b4cb40 CR3=0000000018264000 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=2037353a35343a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a35343a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000