syzkaller login: [ 30.902560] BUG: Bad rss-counter state mm:0000000060ddac9c type:MM_FILEPAGES val:33 [ 30.904040] BUG: Bad rss-counter state mm:0000000060ddac9c type:MM_ANONPAGES val:22 [ 31.100585] ================================================================== [ 31.101178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.101762] Read of size 8 at addr ffff88801998a4e0 by task sshd/221 [ 31.102294] [ 31.102430] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.102963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.110013] Call Trace: [ 31.110220] [ 31.110400] dump_stack_lvl+0x91/0xf0 [ 31.110715] print_report+0xcc/0x620 [ 31.111021] ? __virt_addr_valid+0x102/0x340 [ 31.111353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111749] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112149] kasan_report+0xbe/0xf0 [ 31.112469] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.112879] vma_interval_tree_remove+0xc75/0xec0 [ 31.113270] vma_prepare+0xc54/0x11a0 [ 31.113592] __split_vma+0x5af/0x950 [ 31.114141] ? __pfx___split_vma+0x10/0x10 [ 31.114495] ? find_held_lock+0x2c/0x110 [ 31.114855] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.115230] ? lock_is_held_type+0x9f/0x120 [ 31.115597] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.115998] ? mtree_range_walk+0x632/0x900 [ 31.116371] ? mas_walk+0x5c7/0x7c0 [ 31.116702] do_vmi_munmap+0x1f1/0x2b0 [ 31.117033] mmap_region+0x1f9/0x2660 [ 31.117356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.117703] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.119769] ? __pfx_lock_acquire+0x10/0x10 [ 31.120130] ? __pfx_mmap_region+0x10/0x10 [ 31.120487] ? security_mmap_addr+0x7d/0xa0 [ 31.120844] ? get_unmapped_area+0x1f5/0x3f0 [ 31.121207] do_mmap+0x854/0xf00 [ 31.121501] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.121877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.122260] ksys_mmap_pgoff+0x3af/0x500 [ 31.122606] do_syscall_64+0x3f/0x90 [ 31.122928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123357] RIP: 0033:0x7f48bd7d2d82 [ 31.123667] 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 [ 31.125054] RSP: 002b:00007ffdb8fa9758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.125648] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48bd7d2d82 [ 31.126237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48bcc0c000 [ 31.126800] RBP: 00007f48bcc0c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.127356] R10: 0000000000000812 R11: 0000000000000206 R12: 000055877992cb20 [ 31.127912] R13: 00007ffdb8fa9770 R14: 00007ffdb8fa97a0 R15: 00007ffdb8fa9b00 [ 31.128481] [ 31.128684] [ 31.128831] Allocated by task 212: [ 31.129117] kasan_save_stack+0x22/0x50 [ 31.129457] kasan_set_track+0x25/0x30 [ 31.134092] __kasan_slab_alloc+0x59/0x70 [ 31.134469] kmem_cache_alloc+0x16b/0x370 [ 31.134816] vm_area_dup+0x20/0x160 [ 31.135123] __split_vma+0x170/0x950 [ 31.135435] split_vma+0xc6/0x110 [ 31.135736] mprotect_fixup+0x8d2/0xb30 [ 31.136074] do_mprotect_pkey+0x87e/0xd40 [ 31.136425] __x64_sys_mprotect+0x78/0xc0 [ 31.136774] do_syscall_64+0x3f/0x90 [ 31.137089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137519] [ 31.137667] Freed by task 212: [ 31.138092] kasan_save_stack+0x22/0x50 [ 31.138430] kasan_set_track+0x25/0x30 [ 31.138763] kasan_save_free_info+0x2b/0x50 [ 31.139114] __kasan_slab_free+0x10a/0x190 [ 31.139467] kmem_cache_free+0x10d/0x4d0 [ 31.139815] rcu_core+0x8c8/0x2860 [ 31.140115] __do_softirq+0x1b7/0x7d4 [ 31.140438] [ 31.140589] Last potentially related work creation: [ 31.140971] kasan_save_stack+0x22/0x50 [ 31.141301] __kasan_record_aux_stack+0x8e/0xa0 [ 31.141683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.142354] remove_vma+0x139/0x170 [ 31.142654] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.143038] do_vmi_munmap+0x1f1/0x2b0 [ 31.143347] __vm_munmap+0x138/0x3a0 [ 31.143630] __x64_sys_munmap+0x59/0x80 [ 31.143954] do_syscall_64+0x3f/0x90 [ 31.144287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144723] [ 31.144870] Second to last potentially related work creation: [ 31.145328] kasan_save_stack+0x22/0x50 [ 31.145662] __kasan_record_aux_stack+0x8e/0xa0 [ 31.146172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.146600] remove_vma+0x139/0x170 [ 31.146899] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.147284] do_vmi_munmap+0x1f1/0x2b0 [ 31.147611] mmap_region+0x1f9/0x2660 [ 31.147937] do_mmap+0x854/0xf00 [ 31.148241] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.148570] ksys_mmap_pgoff+0x3af/0x500 [ 31.148906] do_syscall_64+0x3f/0x90 [ 31.149236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.149662] [ 31.149951] The buggy address belongs to the object at ffff88801998a488 [ 31.149951] which belongs to the cache vm_area_struct of size 168 [ 31.150877] The buggy address is located 88 bytes inside of [ 31.150877] freed 168-byte region [ffff88801998a488, ffff88801998a530) [ 31.151740] [ 31.151875] The buggy address belongs to the physical page: [ 31.152282] page:00000000be05f0f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1998a [ 31.152980] memcg:ffff88800ddfe901 [ 31.153260] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.153722] page_type: 0xffffffff() [ 31.154091] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.154804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddfe901 [ 31.155502] page dumped because: kasan: bad access detected [ 31.156009] [ 31.156170] Memory state around the buggy address: [ 31.156612] ffff88801998a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.157277] ffff88801998a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.157948] >ffff88801998a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.158620] ^ [ 31.159215] ffff88801998a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.159917] ffff88801998a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.160606] ================================================================== [ 31.161529] Disabling lock debugging due to kernel taint [ 34.213437] BUG: Bad rss-counter state mm:0000000013ffd210 type:MM_FILEPAGES val:33 [ 34.214204] BUG: Bad rss-counter state mm:0000000013ffd210 type:MM_ANONPAGES val:22 [ 35.011344] BUG: Bad rss-counter state mm:00000000ea0b2c91 type:MM_FILEPAGES val:33 [ 35.011991] BUG: Bad rss-counter state mm:00000000ea0b2c91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3066' (ECDSA) to the list of known hosts. 2023/06/21 10:09:25 fuzzer started 2023/06/21 10:09:25 dialing manager at localhost:36067 2023/06/21 10:09:25 checking machine... 2023/06/21 10:09:25 checking revisions... [ 35.903620] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:09:25 testing simple program... [ 35.962418] cgroup: Unknown subsys name 'net' [ 36.051341] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:09:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f1b030a9240 CR3=0000000013a2e000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=0a0a5b2a4aad98df0000000000133f78 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=55d7ec101bb8befa00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800fce7ce8 RCX=ffffffff844af617 RDX=ffff888019f08000 RSI=0000000000000000 RDI=0000000000000000 RBP=000000000000000b RSP=ffff88800fce7800 R8 =0000000000000000 R9 =0000000000000007 R10=000000000000000a R11=00000000000b6a61 R12=000000000000000a R13=0000000000000001 R14=0000000000000007 R15=00007f5dab40bfff RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 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=00007f5dab45c200 CR3=0000000009a26000 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=756e696c2d34365f3638782f62696c2f XMM01=646d657473797362696c2f756e672d78 XMM02=00302e6f732e646d657473797362696c XMM03=2f756e672d78756e696c2d34365f3638 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000