syzkaller login: [ 32.640770] BUG: Bad rss-counter state mm:0000000047df5530 type:MM_FILEPAGES val:33 [ 32.641766] BUG: Bad rss-counter state mm:0000000047df5530 type:MM_ANONPAGES val:22 [ 32.801052] ================================================================== [ 32.801972] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.802926] Read of size 8 at addr ffff8880096b86b0 by task sshd/222 [ 32.803697] [ 32.803919] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.804895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.805868] Call Trace: [ 32.806195] <TASK> [ 32.806482] dump_stack_lvl+0x91/0xf0 [ 32.807007] print_report+0xcc/0x620 [ 32.807495] ? __virt_addr_valid+0x102/0x340 [ 32.808042] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.808653] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.809265] kasan_report+0xbe/0xf0 [ 32.809740] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.810355] vma_interval_tree_remove+0xc75/0xec0 [ 32.810966] vma_prepare+0xc54/0x11a0 [ 32.811453] __split_vma+0x5af/0x950 [ 32.811928] ? __pfx___split_vma+0x10/0x10 [ 32.812462] ? find_held_lock+0x2c/0x110 [ 32.812990] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.813567] ? lock_is_held_type+0x9f/0x120 [ 32.814110] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.814736] ? mtree_range_walk+0x632/0x900 [ 32.815292] ? mas_walk+0x5c7/0x7c0 [ 32.815771] do_vmi_munmap+0x1f1/0x2b0 [ 32.816270] mmap_region+0x1f9/0x2660 [ 32.816754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.817273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.817986] ? __pfx_lock_acquire+0x10/0x10 [ 32.818527] ? __pfx_mmap_region+0x10/0x10 [ 32.819070] ? security_mmap_addr+0x7d/0xa0 [ 32.819612] ? get_unmapped_area+0x1f5/0x3f0 [ 32.820163] do_mmap+0x854/0xf00 [ 32.820601] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.821104] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.821669] ksys_mmap_pgoff+0x3af/0x500 [ 32.822183] do_syscall_64+0x3f/0x90 [ 32.822671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.823325] RIP: 0033:0x7f65d0a39d82 [ 32.823779] 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 [ 32.825920] RSP: 002b:00007ffe7153d238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.826832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65d0a39d82 [ 32.827699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65cfe73000 [ 32.828558] RBP: 00007f65cfe73000 R08: 0000000000000009 R09: 0000000000001000 [ 32.829425] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c08246ec0 [ 32.830277] R13: 00007ffe7153d250 R14: 00007ffe7153d280 R15: 00007ffe7153d5e0 [ 32.831157] </TASK> [ 32.831452] [ 32.831668] Allocated by task 215: [ 32.832101] kasan_save_stack+0x22/0x50 [ 32.832606] kasan_set_track+0x25/0x30 [ 32.833100] __kasan_slab_alloc+0x59/0x70 [ 32.833632] kmem_cache_alloc+0x16b/0x370 [ 32.834148] vm_area_dup+0x20/0x160 [ 32.834606] __split_vma+0x170/0x950 [ 32.835092] split_vma+0xc6/0x110 [ 32.835537] mprotect_fixup+0x8d2/0xb30 [ 32.836040] do_mprotect_pkey+0x87e/0xd40 [ 32.836582] __x64_sys_mprotect+0x78/0xc0 [ 32.837117] do_syscall_64+0x3f/0x90 [ 32.837597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.838241] [ 32.838456] Freed by task 215: [ 32.838863] kasan_save_stack+0x22/0x50 [ 32.839377] kasan_set_track+0x25/0x30 [ 32.839868] kasan_save_free_info+0x2b/0x50 [ 32.840404] __kasan_slab_free+0x10a/0x190 [ 32.840939] kmem_cache_free+0x10d/0x4d0 [ 32.841455] rcu_core+0x8c8/0x2860 [ 32.841901] __do_softirq+0x1b7/0x7d4 [ 32.842383] [ 32.842597] Last potentially related work creation: [ 32.843201] kasan_save_stack+0x22/0x50 [ 32.843713] __kasan_record_aux_stack+0x8e/0xa0 [ 32.844287] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.845012] remove_vma+0x139/0x170 [ 32.845464] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.846024] do_vmi_munmap+0x1f1/0x2b0 [ 32.846508] __vm_munmap+0x138/0x3a0 [ 32.846997] __x64_sys_munmap+0x59/0x80 [ 32.847499] do_syscall_64+0x3f/0x90 [ 32.847978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.848622] [ 32.848839] The buggy address belongs to the object at ffff8880096b8658 [ 32.848839] which belongs to the cache vm_area_struct of size 168 [ 32.850328] The buggy address is located 88 bytes inside of [ 32.850328] freed 168-byte region [ffff8880096b8658, ffff8880096b8700) [ 32.851759] [ 32.851977] The buggy address belongs to the physical page: [ 32.852632] page:00000000565a04b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96b8 [ 32.853734] memcg:ffff8880096b9001 [ 32.854169] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.854827] page_type: 0xffffffff() [ 32.855285] raw: 0100000000000200 ffff88800879fc80 ffffea00003d92c0 dead000000000002 [ 32.856204] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b9001 [ 32.857116] page dumped because: kasan: bad access detected [ 32.857777] [ 32.857994] Memory state around the buggy address: [ 32.858577] ffff8880096b8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.859445] ffff8880096b8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.860306] >ffff8880096b8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.861156] ^ [ 32.861742] ffff8880096b8700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 32.862594] ffff8880096b8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.863472] ================================================================== [ 32.864588] Disabling lock debugging due to kernel taint [ 35.101804] BUG: Bad rss-counter state mm:00000000bd9b2b76 type:MM_FILEPAGES val:33 [ 35.102832] BUG: Bad rss-counter state mm:00000000bd9b2b76 type:MM_ANONPAGES val:22 [ 35.659399] BUG: Bad rss-counter state mm:00000000ec8879a6 type:MM_FILEPAGES val:33 [ 35.660578] BUG: Bad rss-counter state mm:00000000ec8879a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16671' (ECDSA) to the list of known hosts. 2023/06/19 22:56:37 fuzzer started 2023/06/19 22:56:37 dialing manager at localhost:44161 2023/06/19 22:56:37 checking machine... 2023/06/19 22:56:37 checking revisions... [ 36.323584] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:56:37 testing simple program... [ 36.363801] cgroup: Unknown subsys name 'net' [ 36.418820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:56:35 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=00005653dedc3a34 RCX=0000000000000007 RDX=00005653dedc3a39 RSI=fffffffffffffffc RDI=00005653dedc3a20 RBP=00005653dedc3a39 RSP=00007ffcacf2e7f0 R8 =0000000000000003 R9 =00007ffcacfd9080 R10=0000000000000000 R11=00007ffcacf2e8b0 R12=000000000000000a R13=00007ffcacf2e8c0 R14=00007ffcacf2e8b8 R15=0000000000000004 RIP=00007f0e89d0de7f RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0e894b5900 00000000 00000000 GS =0000 0000000000000000 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=00007f0e889d5000 CR3=0000000008da6000 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=00000000000000000000000000000000 XMM02=ffffffff0f0e0d0c0b0a090807060504 XMM03=000000000011cbd02c67c8bc2e329bc3 XMM04=ae3af8e21d0e4f3c00000000000ae988 XMM05=ddd64882895845c10000000000134de0 XMM06=59d5b690e0af863b0000000000133c78 XMM07=fb795ef6d657705600000000001240e8 XMM08=36353a3232203931206e754a3e36383c XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015d7b680 RSI=ffffffff83ab4224 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888015c774f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a2800000a28 R12=0000000000000000 R13=00000000000000d0 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff81374468 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 00007f0a54695900 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=00007fff70086000 CR3=000000000e9d2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000