syzkaller login: [ 31.079179] BUG: Bad rss-counter state mm:000000006b36d2e4 type:MM_FILEPAGES val:33 [ 31.080390] BUG: Bad rss-counter state mm:000000006b36d2e4 type:MM_ANONPAGES val:22 [ 31.122293] ================================================================== [ 31.123209] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.124176] Read of size 8 at addr ffff88800ef28b38 by task sshd/219 [ 31.124955] [ 31.125175] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.126044] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.127033] Call Trace: [ 31.127603] [ 31.127909] dump_stack_lvl+0x91/0xf0 [ 31.128400] print_report+0xcc/0x620 [ 31.128901] ? __virt_addr_valid+0x102/0x340 [ 31.129461] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.130092] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.130709] kasan_report+0xbe/0xf0 [ 31.131207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.131873] vma_interval_tree_remove+0xc75/0xec0 [ 31.132474] vma_prepare+0xc54/0x11a0 [ 31.132970] __split_vma+0x5af/0x950 [ 31.133443] ? __pfx___split_vma+0x10/0x10 [ 31.133983] ? find_held_lock+0x2c/0x110 [ 31.134499] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.135085] ? lock_is_held_type+0x9f/0x120 [ 31.135644] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.136271] ? mtree_range_walk+0x632/0x900 [ 31.136840] ? mas_walk+0x5c7/0x7c0 [ 31.137320] do_vmi_munmap+0x1f1/0x2b0 [ 31.137830] mmap_region+0x1f9/0x2660 [ 31.138315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.138844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.139579] ? __pfx_lock_acquire+0x10/0x10 [ 31.140120] ? __pfx_mmap_region+0x10/0x10 [ 31.140644] ? security_mmap_addr+0x7d/0xa0 [ 31.141199] ? get_unmapped_area+0x1f5/0x3f0 [ 31.141745] do_mmap+0x854/0xf00 [ 31.142324] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.142848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.143420] ksys_mmap_pgoff+0x3af/0x500 [ 31.143940] do_syscall_64+0x3f/0x90 [ 31.144418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145079] RIP: 0033:0x7fc02fc79d82 [ 31.145532] 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 [ 31.147704] RSP: 002b:00007ffeb0c6cb88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.148634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc02fc79d82 [ 31.149501] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc02f0b3000 [ 31.150358] RBP: 00007fc02f0b3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.151220] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560016bbef70 [ 31.152112] R13: 00007ffeb0c6cba0 R14: 00007ffeb0c6cbd0 R15: 00007ffeb0c6cf30 [ 31.152984] [ 31.153271] [ 31.153491] Allocated by task 212: [ 31.153928] kasan_save_stack+0x22/0x50 [ 31.154433] kasan_set_track+0x25/0x30 [ 31.154954] __kasan_slab_alloc+0x59/0x70 [ 31.155496] kmem_cache_alloc+0x16b/0x370 [ 31.156024] vm_area_dup+0x20/0x160 [ 31.156483] __split_vma+0x170/0x950 [ 31.156976] split_vma+0xc6/0x110 [ 31.157429] mprotect_fixup+0x8d2/0xb30 [ 31.157955] do_mprotect_pkey+0x87e/0xd40 [ 31.158490] __x64_sys_mprotect+0x78/0xc0 [ 31.159055] do_syscall_64+0x3f/0x90 [ 31.159563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.160236] [ 31.160455] Freed by task 212: [ 31.160874] kasan_save_stack+0x22/0x50 [ 31.161396] kasan_set_track+0x25/0x30 [ 31.161919] kasan_save_free_info+0x2b/0x50 [ 31.162471] __kasan_slab_free+0x10a/0x190 [ 31.163039] kmem_cache_free+0x10d/0x4d0 [ 31.163586] rcu_core+0x8c8/0x2860 [ 31.164051] __do_softirq+0x1b7/0x7d4 [ 31.164544] [ 31.164762] Last potentially related work creation: [ 31.165385] kasan_save_stack+0x22/0x50 [ 31.165912] __kasan_record_aux_stack+0x8e/0xa0 [ 31.166499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.167198] remove_vma+0x139/0x170 [ 31.167682] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.168269] do_vmi_munmap+0x1f1/0x2b0 [ 31.168774] __vm_munmap+0x138/0x3a0 [ 31.169270] __x64_sys_munmap+0x59/0x80 [ 31.169787] do_syscall_64+0x3f/0x90 [ 31.170283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.170987] [ 31.171210] The buggy address belongs to the object at ffff88800ef28ae0 [ 31.171210] which belongs to the cache vm_area_struct of size 168 [ 31.172754] The buggy address is located 88 bytes inside of [ 31.172754] freed 168-byte region [ffff88800ef28ae0, ffff88800ef28b88) [ 31.174233] [ 31.174460] The buggy address belongs to the physical page: [ 31.175157] page:00000000a043fb74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef28 [ 31.176321] memcg:ffff888017f87701 [ 31.176760] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.177434] page_type: 0xffffffff() [ 31.177909] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.178872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f87701 [ 31.179863] page dumped because: kasan: bad access detected [ 31.180560] [ 31.180782] Memory state around the buggy address: [ 31.181398] ffff88800ef28a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.182304] ffff88800ef28a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.183207] >ffff88800ef28b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.184140] ^ [ 31.184780] ffff88800ef28b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.185683] ffff88800ef28c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.186596] ================================================================== [ 31.188019] Disabling lock debugging due to kernel taint [ 33.044838] BUG: Bad rss-counter state mm:000000000ffc34ff type:MM_FILEPAGES val:33 [ 33.045948] BUG: Bad rss-counter state mm:000000000ffc34ff type:MM_ANONPAGES val:22 [ 33.486828] BUG: Bad rss-counter state mm:0000000046f5c03a type:MM_FILEPAGES val:33 [ 33.487961] BUG: Bad rss-counter state mm:0000000046f5c03a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16029' (ECDSA) to the list of known hosts. 2023/06/20 13:21:54 fuzzer started 2023/06/20 13:21:54 dialing manager at localhost:36067 2023/06/20 13:21:55 checking machine... 2023/06/20 13:21:55 checking revisions... [ 34.158630] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:21:55 testing simple program... [ 34.204203] cgroup: Unknown subsys name 'net' [ 34.238762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:21:54 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=ffff888008c04000 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=00007f57d8caaa40 CR3=0000000008c76000 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=2034353a31323a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a31323a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000000002b RCX=ffffffff81f57d93 RDX=ffff888016543680 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff88800f661000 RSP=ffff88800fbafa70 R8 =0000000000000003 R9 =0000000000000000 R10=000000000000002b R11=00000000000b6a61 R12=ffff888006a100d8 R13=0000000000000001 R14=0000000000000062 R15=dffffc0000000000 RIP=ffffffff814c086b RFL=00000206 [-----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 00007f130dfa7900 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=00007fffa2d9f000 CR3=0000000008c72000 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