syzkaller login: [ 30.693994] BUG: Bad rss-counter state mm:00000000574b91ba type:MM_FILEPAGES val:33 [ 30.694986] BUG: Bad rss-counter state mm:00000000574b91ba type:MM_ANONPAGES val:22 [ 30.856873] ================================================================== [ 30.857815] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.858771] Read of size 8 at addr ffff888015b5d798 by task sshd/221 [ 30.859546] [ 30.859765] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.860786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.861799] Call Trace: [ 30.862121] [ 30.862414] dump_stack_lvl+0x91/0xf0 [ 30.862926] print_report+0xcc/0x620 [ 30.863428] ? __virt_addr_valid+0x102/0x340 [ 30.863984] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864616] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865250] kasan_report+0xbe/0xf0 [ 30.865735] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866373] vma_interval_tree_remove+0xc75/0xec0 [ 30.866992] vma_prepare+0xc54/0x11a0 [ 30.867474] __split_vma+0x5af/0x950 [ 30.867962] ? __pfx___split_vma+0x10/0x10 [ 30.868502] ? find_held_lock+0x2c/0x110 [ 30.869032] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.869611] ? lock_is_held_type+0x9f/0x120 [ 30.870159] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.870782] ? mtree_range_walk+0x632/0x900 [ 30.871352] ? mas_walk+0x5c7/0x7c0 [ 30.871844] do_vmi_munmap+0x1f1/0x2b0 [ 30.872345] mmap_region+0x1f9/0x2660 [ 30.872831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.873363] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.874080] ? __pfx_lock_acquire+0x10/0x10 [ 30.874613] ? __pfx_mmap_region+0x10/0x10 [ 30.875144] ? security_mmap_addr+0x7d/0xa0 [ 30.875694] ? get_unmapped_area+0x1f5/0x3f0 [ 30.876250] do_mmap+0x854/0xf00 [ 30.876692] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.877187] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.877762] ksys_mmap_pgoff+0x3af/0x500 [ 30.878278] do_syscall_64+0x3f/0x90 [ 30.878760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.879417] RIP: 0033:0x7fd80d006d82 [ 30.879889] 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 [ 30.882057] RSP: 002b:00007ffcd8517dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.882972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd80d006d82 [ 30.883827] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd80c440000 [ 30.884677] RBP: 00007fd80c440000 R08: 0000000000000009 R09: 0000000000001000 [ 30.885540] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571df418ec0 [ 30.886385] R13: 00007ffcd8517df0 R14: 00007ffcd8517e20 R15: 00007ffcd8518180 [ 30.887265] [ 30.887561] [ 30.887781] Allocated by task 214: [ 30.888213] kasan_save_stack+0x22/0x50 [ 30.888722] kasan_set_track+0x25/0x30 [ 30.889227] __kasan_slab_alloc+0x59/0x70 [ 30.889794] kmem_cache_alloc+0x16b/0x370 [ 30.890322] vm_area_dup+0x20/0x160 [ 30.890779] __split_vma+0x170/0x950 [ 30.891256] split_vma+0xc6/0x110 [ 30.891705] mprotect_fixup+0x8d2/0xb30 [ 30.892222] do_mprotect_pkey+0x87e/0xd40 [ 30.892753] __x64_sys_mprotect+0x78/0xc0 [ 30.893306] do_syscall_64+0x3f/0x90 [ 30.893792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894455] [ 30.894677] Freed by task 19: [ 30.895071] kasan_save_stack+0x22/0x50 [ 30.895576] kasan_set_track+0x25/0x30 [ 30.896078] kasan_save_free_info+0x2b/0x50 [ 30.896614] __kasan_slab_free+0x10a/0x190 [ 30.897152] kmem_cache_free+0x10d/0x4d0 [ 30.897681] rcu_core+0x8c8/0x2860 [ 30.898128] __do_softirq+0x1b7/0x7d4 [ 30.898609] [ 30.898829] Last potentially related work creation: [ 30.899414] kasan_save_stack+0x22/0x50 [ 30.899918] __kasan_record_aux_stack+0x8e/0xa0 [ 30.900495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.901137] remove_vma+0x139/0x170 [ 30.901683] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.902246] do_vmi_munmap+0x1f1/0x2b0 [ 30.902738] __vm_munmap+0x138/0x3a0 [ 30.903213] __x64_sys_munmap+0x59/0x80 [ 30.903711] do_syscall_64+0x3f/0x90 [ 30.904189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904832] [ 30.905052] The buggy address belongs to the object at ffff888015b5d740 [ 30.905052] which belongs to the cache vm_area_struct of size 168 [ 30.906559] The buggy address is located 88 bytes inside of [ 30.906559] freed 168-byte region [ffff888015b5d740, ffff888015b5d7e8) [ 30.907990] [ 30.908209] The buggy address belongs to the physical page: [ 30.908877] page:00000000a67b6ff3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b5d [ 30.909985] memcg:ffff88800e58a901 [ 30.910460] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.911128] page_type: 0xffffffff() [ 30.911591] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.912520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e58a901 [ 30.913465] page dumped because: kasan: bad access detected [ 30.914162] [ 30.914381] Memory state around the buggy address: [ 30.914990] ffff888015b5d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.915879] ffff888015b5d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.916754] >ffff888015b5d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.917632] ^ [ 30.918120] ffff888015b5d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.918971] ffff888015b5d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.919817] ================================================================== [ 30.920866] Disabling lock debugging due to kernel taint [ 33.098506] BUG: Bad rss-counter state mm:000000002f592d67 type:MM_FILEPAGES val:33 [ 33.099685] BUG: Bad rss-counter state mm:000000002f592d67 type:MM_ANONPAGES val:22 [ 33.598012] BUG: Bad rss-counter state mm:00000000b48a38d4 type:MM_FILEPAGES val:33 [ 33.599232] BUG: Bad rss-counter state mm:00000000b48a38d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44854' (ECDSA) to the list of known hosts. 2023/06/20 14:41:48 fuzzer started 2023/06/20 14:41:48 dialing manager at localhost:36067 2023/06/20 14:41:48 checking machine... 2023/06/20 14:41:48 checking revisions... [ 34.284315] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:41:48 testing simple program... [ 34.331286] cgroup: Unknown subsys name 'net' [ 34.383594] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:41:48 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=00007ffe88adf568 CR3=0000000005482000 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=00007f21ea13f5100000562039e63790 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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e01 RDX=1ffff11001fe6ea7 RSI=ffffffff8180c705 RDI=ffff88800ff374f8 RBP=ffff88800ff37550 RSP=ffff88800ff37488 R8 =ffffffff86138e90 R9 =ffff88800ff37538 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800ff37558 R13=ffff88800ff37540 R14=ffff88800ff37539 R15=ffff88800ff374f8 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007f53f1cae900 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=00007f53f2263650 CR3=000000001be78000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000