syzkaller login: [ 38.797453] BUG: Bad rss-counter state mm:00000000516011ff type:MM_FILEPAGES val:33 [ 38.798848] BUG: Bad rss-counter state mm:00000000516011ff type:MM_ANONPAGES val:22 [ 38.953667] ================================================================== [ 38.954627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.955620] Read of size 8 at addr ffff888016d25140 by task sshd/219 [ 38.956594] [ 38.956863] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.957839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.958884] Call Trace: [ 38.959223] [ 38.959539] dump_stack_lvl+0x91/0xf0 [ 38.960063] print_report+0xcc/0x620 [ 38.960580] ? __virt_addr_valid+0x102/0x340 [ 38.961198] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.961871] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.962531] kasan_report+0xbe/0xf0 [ 38.963038] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.963698] vma_interval_tree_remove+0xc75/0xec0 [ 38.964345] vma_prepare+0xc54/0x11a0 [ 38.964878] __split_vma+0x5af/0x950 [ 38.965413] ? __pfx___split_vma+0x10/0x10 [ 38.965982] ? find_held_lock+0x2c/0x110 [ 38.966540] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.967146] ? lock_is_held_type+0x9f/0x120 [ 38.967725] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.968368] ? mtree_range_walk+0x632/0x900 [ 38.968997] ? mas_walk+0x5c7/0x7c0 [ 38.969536] do_vmi_munmap+0x1f1/0x2b0 [ 38.970066] mmap_region+0x1f9/0x2660 [ 38.970582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.971125] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.971890] ? __pfx_lock_acquire+0x10/0x10 [ 38.972457] ? __pfx_mmap_region+0x10/0x10 [ 38.973059] ? security_mmap_addr+0x7d/0xa0 [ 38.973639] ? get_unmapped_area+0x1f5/0x3f0 [ 38.974225] do_mmap+0x854/0xf00 [ 38.974694] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.975220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.975824] ksys_mmap_pgoff+0x3af/0x500 [ 38.976365] do_syscall_64+0x3f/0x90 [ 38.976909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.977626] RIP: 0033:0x7f9cafc30d82 [ 38.978114] 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 [ 38.980388] RSP: 002b:00007fffef506ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.981426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cafc30d82 [ 38.982341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9caf06a000 [ 38.983253] RBP: 00007f9caf06a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.984159] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed8223dec0 [ 38.985095] R13: 00007fffef506bc0 R14: 00007fffef506bf0 R15: 00007fffef506f50 [ 38.986017] [ 38.986331] [ 38.986557] Allocated by task 212: [ 38.987015] kasan_save_stack+0x22/0x50 [ 38.987554] kasan_set_track+0x25/0x30 [ 38.988085] __kasan_slab_alloc+0x59/0x70 [ 38.988651] kmem_cache_alloc+0x16b/0x370 [ 38.989243] vm_area_dup+0x20/0x160 [ 38.989744] __split_vma+0x170/0x950 [ 38.990238] split_vma+0xc6/0x110 [ 38.990710] mprotect_fixup+0x8d2/0xb30 [ 38.991242] do_mprotect_pkey+0x87e/0xd40 [ 38.991805] __x64_sys_mprotect+0x78/0xc0 [ 38.992359] do_syscall_64+0x3f/0x90 [ 38.992896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.993624] [ 38.993852] Freed by task 212: [ 38.994278] kasan_save_stack+0x22/0x50 [ 38.994819] kasan_set_track+0x25/0x30 [ 38.995350] kasan_save_free_info+0x2b/0x50 [ 38.995921] __kasan_slab_free+0x10a/0x190 [ 38.996492] kmem_cache_free+0x10d/0x4d0 [ 38.997082] rcu_core+0x8c8/0x2860 [ 38.997570] __do_softirq+0x1b7/0x7d4 [ 38.998146] [ 38.998374] Last potentially related work creation: [ 38.998989] kasan_save_stack+0x22/0x50 [ 38.999522] __kasan_record_aux_stack+0x8e/0xa0 [ 39.000132] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.000826] remove_vma+0x139/0x170 [ 39.001345] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.001952] do_vmi_munmap+0x1f1/0x2b0 [ 39.002479] __vm_munmap+0x138/0x3a0 [ 39.002980] __x64_sys_munmap+0x59/0x80 [ 39.003513] do_syscall_64+0x3f/0x90 [ 39.004021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.004710] [ 39.004979] The buggy address belongs to the object at ffff888016d250e8 [ 39.004979] which belongs to the cache vm_area_struct of size 168 [ 39.006563] The buggy address is located 88 bytes inside of [ 39.006563] freed 168-byte region [ffff888016d250e8, ffff888016d25190) [ 39.008059] [ 39.008289] The buggy address belongs to the physical page: [ 39.009024] page:0000000028020c0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16d25 [ 39.010189] memcg:ffff88800ebcd701 [ 39.010642] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.011330] page_type: 0xffffffff() [ 39.011807] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c2c0 dead000000000006 [ 39.012770] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebcd701 [ 39.013789] page dumped because: kasan: bad access detected [ 39.014494] [ 39.014724] Memory state around the buggy address: [ 39.015336] ffff888016d25000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.016237] ffff888016d25080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.017188] >ffff888016d25100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.018100] ^ [ 39.018773] ffff888016d25180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.019667] ffff888016d25200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.020567] ================================================================== [ 39.021588] Disabling lock debugging due to kernel taint [ 41.696360] BUG: Bad rss-counter state mm:0000000044d8d7ab type:MM_FILEPAGES val:33 [ 41.697969] BUG: Bad rss-counter state mm:0000000044d8d7ab type:MM_ANONPAGES val:22 [ 42.207319] BUG: Bad rss-counter state mm:000000005da40cf8 type:MM_FILEPAGES val:33 [ 42.208358] BUG: Bad rss-counter state mm:000000005da40cf8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17727' (ECDSA) to the list of known hosts. 2023/06/20 19:36:43 fuzzer started 2023/06/20 19:36:44 dialing manager at localhost:36067 2023/06/20 19:36:44 checking machine... 2023/06/20 19:36:44 checking revisions... [ 42.916580] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:36:44 testing simple program... [ 42.972626] cgroup: Unknown subsys name 'net' [ 43.013054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:36:43 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=00007ffc8b7f23f8 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=00007fdefad2f51000005655465cc790 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f9c1c2e2660 CR3=000000000d818000 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=576a3fb362686b935542570f5f22d438 XMM02=2c67c8bc2e329bc3000000000011b730 XMM03=fb795ef6d657705600000000001220d0 XMM04=a8b7580934348bff00000000000ae988 XMM05=e4cb8bb95a7664b600000000001326c8 XMM06=38ce029f1887b50f0000000000130e50 XMM07=e042d86d42eb936e00000000001223a8 XMM08=5641725a8a1faab9000000000011b790 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000