syzkaller login: [ 30.029115] BUG: Bad rss-counter state mm:00000000fd67dc7b type:MM_FILEPAGES val:33 [ 30.030523] BUG: Bad rss-counter state mm:00000000fd67dc7b type:MM_ANONPAGES val:22 [ 30.180421] ================================================================== [ 30.181333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.182319] Read of size 8 at addr ffff888018d7a880 by task sshd/219 [ 30.183248] [ 30.183468] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.184350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.185339] Call Trace: [ 30.185667] <TASK> [ 30.185992] dump_stack_lvl+0x91/0xf0 [ 30.186497] print_report+0xcc/0x620 [ 30.186988] ? __virt_addr_valid+0x102/0x340 [ 30.187586] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.188214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.188847] kasan_report+0xbe/0xf0 [ 30.189327] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.189987] vma_interval_tree_remove+0xc75/0xec0 [ 30.190611] vma_prepare+0xc54/0x11a0 [ 30.191089] __split_vma+0x5af/0x950 [ 30.191597] ? __pfx___split_vma+0x10/0x10 [ 30.192133] ? find_held_lock+0x2c/0x110 [ 30.192657] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.193223] ? lock_is_held_type+0x9f/0x120 [ 30.193768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.194412] ? mtree_range_walk+0x632/0x900 [ 30.194965] ? mas_walk+0x5c7/0x7c0 [ 30.195461] do_vmi_munmap+0x1f1/0x2b0 [ 30.195951] mmap_region+0x1f9/0x2660 [ 30.196441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.196965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.197678] ? __pfx_lock_acquire+0x10/0x10 [ 30.198262] ? __pfx_mmap_region+0x10/0x10 [ 30.198810] ? security_mmap_addr+0x7d/0xa0 [ 30.199358] ? get_unmapped_area+0x1f5/0x3f0 [ 30.199917] do_mmap+0x854/0xf00 [ 30.200358] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.200852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.201423] ksys_mmap_pgoff+0x3af/0x500 [ 30.201965] do_syscall_64+0x3f/0x90 [ 30.202453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.203127] RIP: 0033:0x7fc186be0d82 [ 30.203593] 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 [ 30.205728] RSP: 002b:00007ffe6ec7b868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.206672] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc186be0d82 [ 30.207539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc18601a000 [ 30.208399] RBP: 00007fc18601a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.209255] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ec74efb20 [ 30.210149] R13: 00007ffe6ec7b880 R14: 00007ffe6ec7b8b0 R15: 00007ffe6ec7bc10 [ 30.211023] </TASK> [ 30.211337] [ 30.211560] Allocated by task 212: [ 30.211989] kasan_save_stack+0x22/0x50 [ 30.212504] kasan_set_track+0x25/0x30 [ 30.213010] __kasan_slab_alloc+0x59/0x70 [ 30.213543] kmem_cache_alloc+0x16b/0x370 [ 30.214096] vm_area_dup+0x20/0x160 [ 30.214557] __split_vma+0x170/0x950 [ 30.215032] split_vma+0xc6/0x110 [ 30.215509] mprotect_fixup+0x8d2/0xb30 [ 30.216031] do_mprotect_pkey+0x87e/0xd40 [ 30.216578] __x64_sys_mprotect+0x78/0xc0 [ 30.217101] do_syscall_64+0x3f/0x90 [ 30.217592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.218280] [ 30.218500] Freed by task 212: [ 30.218900] kasan_save_stack+0x22/0x50 [ 30.219423] kasan_set_track+0x25/0x30 [ 30.219917] kasan_save_free_info+0x2b/0x50 [ 30.220452] __kasan_slab_free+0x10a/0x190 [ 30.220993] kmem_cache_free+0x10d/0x4d0 [ 30.221499] rcu_core+0x8c8/0x2860 [ 30.221975] __do_softirq+0x1b7/0x7d4 [ 30.222454] [ 30.222672] Last potentially related work creation: [ 30.223266] kasan_save_stack+0x22/0x50 [ 30.223788] __kasan_record_aux_stack+0x8e/0xa0 [ 30.224361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.225020] remove_vma+0x139/0x170 [ 30.225490] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.226089] do_vmi_munmap+0x1f1/0x2b0 [ 30.226594] __vm_munmap+0x138/0x3a0 [ 30.227071] __x64_sys_munmap+0x59/0x80 [ 30.227608] do_syscall_64+0x3f/0x90 [ 30.228091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.228744] [ 30.228967] The buggy address belongs to the object at ffff888018d7a828 [ 30.228967] which belongs to the cache vm_area_struct of size 168 [ 30.230493] The buggy address is located 88 bytes inside of [ 30.230493] freed 168-byte region [ffff888018d7a828, ffff888018d7a8d0) [ 30.231921] [ 30.232141] The buggy address belongs to the physical page: [ 30.232808] page:000000004d62d5a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d7a [ 30.233975] memcg:ffff88800d498601 [ 30.234423] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.235126] page_type: 0xffffffff() [ 30.235597] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a98c0 0000000000000002 [ 30.236563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d498601 [ 30.237514] page dumped because: kasan: bad access detected [ 30.238239] [ 30.238463] Memory state around the buggy address: [ 30.239072] ffff888018d7a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.239980] ffff888018d7a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.240876] >ffff888018d7a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.241773] ^ [ 30.242240] ffff888018d7a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.243153] ffff888018d7a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.244047] ================================================================== [ 30.245082] Disabling lock debugging due to kernel taint [ 32.190258] BUG: Bad rss-counter state mm:0000000094cee8a2 type:MM_FILEPAGES val:33 [ 32.191218] BUG: Bad rss-counter state mm:0000000094cee8a2 type:MM_ANONPAGES val:22 [ 32.722784] BUG: Bad rss-counter state mm:000000004710a245 type:MM_FILEPAGES val:33 [ 32.724020] BUG: Bad rss-counter state mm:000000004710a245 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32526' (ECDSA) to the list of known hosts. 2023/06/21 00:47:50 fuzzer started 2023/06/21 00:47:50 dialing manager at localhost:36067 2023/06/21 00:47:50 checking machine... 2023/06/21 00:47:50 checking revisions... [ 33.356706] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:47:50 testing simple program... [ 33.411435] cgroup: Unknown subsys name 'net' [ 33.445333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:47:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff861c512a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88801c8efbd8 RSP=ffff88801c8efb10 R8 =ffffffff861c512e R9 =ffff88801c8efbc0 R10=0000000000038001 R11=000000000003835b R12=ffff88801c8efbe0 R13=ffff88801c8efbc8 R14=0000000000000015 R15=ffff88801c8efb80 RIP=ffffffff81130b17 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 00007fca4dc38900 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=00007fca4dbec01c CR3=0000000015b66000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffc049acde8 CR3=0000000005482000 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=00007f756749b5100000562e1154e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000