syzkaller login: [ 31.054333] BUG: Bad rss-counter state mm:00000000be3b8f37 type:MM_FILEPAGES val:33 [ 31.055147] BUG: Bad rss-counter state mm:00000000be3b8f37 type:MM_ANONPAGES val:22 [ 31.180337] ================================================================== [ 31.181030] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.181688] Read of size 8 at addr ffff888019f845c8 by task sshd/220 [ 31.182286] [ 31.182448] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.183050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.183728] Call Trace: [ 31.183961] [ 31.184167] dump_stack_lvl+0x91/0xf0 [ 31.184683] print_report+0xcc/0x620 [ 31.185406] ? __virt_addr_valid+0x102/0x340 [ 31.186400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187525] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.188589] kasan_report+0xbe/0xf0 [ 31.189351] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.190478] vma_interval_tree_remove+0xc75/0xec0 [ 31.191497] vma_prepare+0xc54/0x11a0 [ 31.192307] __split_vma+0x5af/0x950 [ 31.193118] ? __pfx___split_vma+0x10/0x10 [ 31.194034] ? find_held_lock+0x2c/0x110 [ 31.194917] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.195983] ? lock_is_held_type+0x9f/0x120 [ 31.196937] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.198002] ? mtree_range_walk+0x632/0x900 [ 31.199016] ? mas_walk+0x5c7/0x7c0 [ 31.199864] do_vmi_munmap+0x1f1/0x2b0 [ 31.200740] mmap_region+0x1f9/0x2660 [ 31.201653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.202373] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.202903] ? __pfx_lock_acquire+0x10/0x10 [ 31.203263] ? __pfx_mmap_region+0x10/0x10 [ 31.203641] ? security_mmap_addr+0x7d/0xa0 [ 31.204018] ? get_unmapped_area+0x1f5/0x3f0 [ 31.204422] do_mmap+0x854/0xf00 [ 31.204746] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205104] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.205529] ksys_mmap_pgoff+0x3af/0x500 [ 31.205881] do_syscall_64+0x3f/0x90 [ 31.206253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.206719] RIP: 0033:0x7f9fdbcfed82 [ 31.207056] 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 [ 31.208551] RSP: 002b:00007ffe554e6c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.209201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fdbcfed82 [ 31.209796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fdb138000 [ 31.210545] RBP: 00007f9fdb138000 R08: 0000000000000009 R09: 0000000000001000 [ 31.211139] R10: 0000000000000812 R11: 0000000000000206 R12: 000056427e8d6f70 [ 31.211715] R13: 00007ffe554e6c20 R14: 00007ffe554e6c50 R15: 00007ffe554e6fb0 [ 31.212328] [ 31.212538] [ 31.212685] Allocated by task 212: [ 31.212976] kasan_save_stack+0x22/0x50 [ 31.213333] kasan_set_track+0x25/0x30 [ 31.213681] __kasan_slab_alloc+0x59/0x70 [ 31.214073] kmem_cache_alloc+0x16b/0x370 [ 31.214429] vm_area_dup+0x20/0x160 [ 31.214760] __split_vma+0x170/0x950 [ 31.215089] split_vma+0xc6/0x110 [ 31.215379] mprotect_fixup+0x8d2/0xb30 [ 31.215723] do_mprotect_pkey+0x87e/0xd40 [ 31.216069] __x64_sys_mprotect+0x78/0xc0 [ 31.216423] do_syscall_64+0x3f/0x90 [ 31.216761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.217221] [ 31.217368] Freed by task 202: [ 31.217636] kasan_save_stack+0x22/0x50 [ 31.217975] kasan_set_track+0x25/0x30 [ 31.218369] kasan_save_free_info+0x2b/0x50 [ 31.218760] __kasan_slab_free+0x10a/0x190 [ 31.219126] kmem_cache_free+0x10d/0x4d0 [ 31.219470] rcu_core+0x8c8/0x2860 [ 31.219772] __do_softirq+0x1b7/0x7d4 [ 31.220091] [ 31.220232] Last potentially related work creation: [ 31.220628] kasan_save_stack+0x22/0x50 [ 31.220963] __kasan_record_aux_stack+0x8e/0xa0 [ 31.221355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.221786] remove_vma+0x139/0x170 [ 31.222146] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.222527] do_vmi_munmap+0x1f1/0x2b0 [ 31.222835] __vm_munmap+0x138/0x3a0 [ 31.223148] __x64_sys_munmap+0x59/0x80 [ 31.223487] do_syscall_64+0x3f/0x90 [ 31.223823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.224268] [ 31.224462] The buggy address belongs to the object at ffff888019f84570 [ 31.224462] which belongs to the cache vm_area_struct of size 168 [ 31.225419] The buggy address is located 88 bytes inside of [ 31.225419] freed 168-byte region [ffff888019f84570, ffff888019f84618) [ 31.226521] [ 31.226668] The buggy address belongs to the physical page: [ 31.227097] page:000000007e484ad5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f84 [ 31.227808] memcg:ffff88800ea76601 [ 31.228083] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.228508] page_type: 0xffffffff() [ 31.228805] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.229435] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea76601 [ 31.230072] page dumped because: kasan: bad access detected [ 31.230559] [ 31.230703] Memory state around the buggy address: [ 31.231071] ffff888019f84480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.231649] ffff888019f84500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.232261] >ffff888019f84580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.232822] ^ [ 31.233262] ffff888019f84600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.233813] ffff888019f84680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.234388] ================================================================== [ 31.235096] Disabling lock debugging due to kernel taint [ 32.820318] BUG: Bad rss-counter state mm:00000000f2ec3266 type:MM_FILEPAGES val:33 [ 32.821133] BUG: Bad rss-counter state mm:00000000f2ec3266 type:MM_ANONPAGES val:22 [ 33.111017] BUG: Bad rss-counter state mm:00000000b7bce8da type:MM_FILEPAGES val:33 [ 33.111686] BUG: Bad rss-counter state mm:00000000b7bce8da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63230' (ECDSA) to the list of known hosts. 2023/06/21 08:37:44 fuzzer started 2023/06/21 08:37:44 dialing manager at localhost:36067 2023/06/21 08:37:44 checking machine... 2023/06/21 08:37:44 checking revisions... [ 33.698169] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:37:44 testing simple program... [ 33.729954] cgroup: Unknown subsys name 'net' [ 33.778479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:37:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019edbbe0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffed10033db799 RBP=00000000000000f0 RSP=ffff888016d77b88 R8 =0000000000000004 R9 =0000000000000004 R10=ffffed10033db77c R11=ffffffff81806f71 R12=ffff888019edbbe0 R13=0000000000092cc0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff84513452 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 00007f02971b6900 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=00007ffc495d8000 CR3=000000000e816000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007fd64f465a30 CR3=000000000cd4a000 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=3824eebd201e06bbc7416cf1daa86ca3 XMM02=2c67c8bc2e329bc3000000000011ad38 XMM03=fb795ef6d65770560000000000121b18 XMM04=67e051d6d3e88df200000000000ae988 XMM05=dfcdbad4f1609c370000000000131950 XMM06=806171799158d96700000000001317d8 XMM07=e042d86d42eb936e0000000000121d98 XMM08=2fa0068d3198127b000000000011ad98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000