syzkaller login: [ 30.993714] BUG: Bad rss-counter state mm:000000005009572e type:MM_FILEPAGES val:33 [ 30.994839] BUG: Bad rss-counter state mm:000000005009572e type:MM_ANONPAGES val:22 [ 31.148897] ================================================================== [ 31.149752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.150631] Read of size 8 at addr ffff888016c0cd08 by task sshd/221 [ 31.151350] [ 31.151560] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.152391] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.153302] Call Trace: [ 31.153605] [ 31.153873] dump_stack_lvl+0x91/0xf0 [ 31.154336] print_report+0xcc/0x620 [ 31.154790] ? __virt_addr_valid+0x102/0x340 [ 31.155305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.155889] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.156470] kasan_report+0xbe/0xf0 [ 31.156928] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157517] vma_interval_tree_remove+0xc75/0xec0 [ 31.158111] vma_prepare+0xc54/0x11a0 [ 31.158590] __split_vma+0x5af/0x950 [ 31.159056] ? __pfx___split_vma+0x10/0x10 [ 31.159569] ? find_held_lock+0x2c/0x110 [ 31.160108] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.160791] ? lock_is_held_type+0x9f/0x120 [ 31.161350] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.161957] ? mtree_range_walk+0x632/0x900 [ 31.162496] ? mas_walk+0x5c7/0x7c0 [ 31.162964] do_vmi_munmap+0x1f1/0x2b0 [ 31.163449] mmap_region+0x1f9/0x2660 [ 31.163931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.164450] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.165147] ? __pfx_lock_acquire+0x10/0x10 [ 31.165678] ? __pfx_mmap_region+0x10/0x10 [ 31.166207] ? security_mmap_addr+0x7d/0xa0 [ 31.166730] ? get_unmapped_area+0x1f5/0x3f0 [ 31.167277] do_mmap+0x854/0xf00 [ 31.167717] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.168220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.168779] ksys_mmap_pgoff+0x3af/0x500 [ 31.169290] do_syscall_64+0x3f/0x90 [ 31.169768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170412] RIP: 0033:0x7fec80cfed82 [ 31.170871] 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 [ 31.173008] RSP: 002b:00007ffe0b468a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.173909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec80cfed82 [ 31.174764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec80138000 [ 31.175618] RBP: 00007fec80138000 R08: 0000000000000009 R09: 0000000000001000 [ 31.176472] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad3960bec0 [ 31.177319] R13: 00007ffe0b468ab0 R14: 00007ffe0b468ae0 R15: 00007ffe0b468e40 [ 31.178184] [ 31.178477] [ 31.178699] Allocated by task 214: [ 31.179128] kasan_save_stack+0x22/0x50 [ 31.179638] kasan_set_track+0x25/0x30 [ 31.180144] __kasan_slab_alloc+0x59/0x70 [ 31.180672] kmem_cache_alloc+0x16b/0x370 [ 31.181192] vm_area_dup+0x20/0x160 [ 31.181641] __split_vma+0x170/0x950 [ 31.182101] split_vma+0xc6/0x110 [ 31.182539] mprotect_fixup+0x8d2/0xb30 [ 31.183043] do_mprotect_pkey+0x87e/0xd40 [ 31.183561] __x64_sys_mprotect+0x78/0xc0 [ 31.184098] do_syscall_64+0x3f/0x90 [ 31.184581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185206] [ 31.185419] Freed by task 211: [ 31.185816] kasan_save_stack+0x22/0x50 [ 31.186319] kasan_set_track+0x25/0x30 [ 31.186814] kasan_save_free_info+0x2b/0x50 [ 31.187341] __kasan_slab_free+0x10a/0x190 [ 31.187869] kmem_cache_free+0x10d/0x4d0 [ 31.188376] rcu_core+0x8c8/0x2860 [ 31.188822] __do_softirq+0x1b7/0x7d4 [ 31.189302] [ 31.189526] Last potentially related work creation: [ 31.190115] kasan_save_stack+0x22/0x50 [ 31.190612] __kasan_record_aux_stack+0x8e/0xa0 [ 31.191181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.191823] remove_vma+0x139/0x170 [ 31.192291] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.192837] do_vmi_munmap+0x1f1/0x2b0 [ 31.193325] __vm_munmap+0x138/0x3a0 [ 31.193780] __x64_sys_munmap+0x59/0x80 [ 31.194281] do_syscall_64+0x3f/0x90 [ 31.194751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.195386] [ 31.195599] The buggy address belongs to the object at ffff888016c0ccb0 [ 31.195599] which belongs to the cache vm_area_struct of size 168 [ 31.197080] The buggy address is located 88 bytes inside of [ 31.197080] freed 168-byte region [ffff888016c0ccb0, ffff888016c0cd58) [ 31.198488] [ 31.198703] The buggy address belongs to the physical page: [ 31.199352] page:00000000b50a829d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c0c [ 31.200464] memcg:ffff88800f20cc01 [ 31.200893] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.201541] page_type: 0xffffffff() [ 31.201993] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.202906] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f20cc01 [ 31.203819] page dumped because: kasan: bad access detected [ 31.204555] [ 31.204775] Memory state around the buggy address: [ 31.205363] ffff888016c0cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.206227] ffff888016c0cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.207081] >ffff888016c0cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.207940] ^ [ 31.208385] ffff888016c0cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.209251] ffff888016c0ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.210108] ================================================================== [ 31.211034] Disabling lock debugging due to kernel taint [ 34.035049] BUG: Bad rss-counter state mm:00000000e002cc38 type:MM_FILEPAGES val:33 [ 34.036070] BUG: Bad rss-counter state mm:00000000e002cc38 type:MM_ANONPAGES val:22 [ 34.607463] BUG: Bad rss-counter state mm:000000000a299fb2 type:MM_FILEPAGES val:33 [ 34.608514] BUG: Bad rss-counter state mm:000000000a299fb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51729' (ECDSA) to the list of known hosts. 2023/06/20 06:10:58 fuzzer started 2023/06/20 06:10:59 dialing manager at localhost:44161 2023/06/20 06:10:59 checking machine... 2023/06/20 06:10:59 checking revisions... [ 35.322545] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:10:59 testing simple program... [ 35.370404] cgroup: Unknown subsys name 'net' [ 35.407905] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:10:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff83c1fca0 RCX=0000000000000001 RDX=1ffff11002b6ce98 RSI=ffff888015b67b48 RDI=ffffffff83c1fca0 RBP=ffffffff83c1fca0 RSP=ffff888015b67418 R8 =0000000000000001 R9 =ffff888015b674a8 R10=0000000000038001 R11=000000000008b00b R12=0000000000000001 R13=0000000000000000 R14=ffff8880141d0000 R15=ffffea00003f8d80 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f9620045900 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=00005592bce95768 CR3=000000000c982000 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=ff0000000000ffff0000000000ff0000 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=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002d86ea2 RSP=ffff888016c374f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff8182e0f2 R14=ffff88806cf361e8 R15=ffff88806cf361f0 RIP=ffffffff8135b910 RFL=00000016 [----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 00007f744d039900 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=00007f744c4c8388 CR3=000000000c606000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=81159174211651d600000000000ae988 XMM05=3084fbc4fb42b89900000000001351d0 XMM06=e91fe99daec143a60000000000133f70 XMM07=fb795ef6d657705600000000001241e0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000