syzkaller login: [ 113.240542] BUG: Bad rss-counter state mm:000000009668b92d type:MM_FILEPAGES val:33 [ 113.241805] BUG: Bad rss-counter state mm:000000009668b92d type:MM_ANONPAGES val:22 [ 113.363786] ================================================================== [ 113.364745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 113.365718] Read of size 8 at addr ffff88800c494140 by task sshd/220 [ 113.366633] [ 113.366858] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 113.367914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 113.368976] Call Trace: [ 113.369311] [ 113.369608] dump_stack_lvl+0x91/0xf0 [ 113.370118] print_report+0xcc/0x620 [ 113.370635] ? __virt_addr_valid+0x102/0x340 [ 113.371210] ? vma_interval_tree_remove+0xc75/0xec0 [ 113.371864] ? vma_interval_tree_remove+0xc75/0xec0 [ 113.372510] kasan_report+0xbe/0xf0 [ 113.373006] ? vma_interval_tree_remove+0xc75/0xec0 [ 113.373648] vma_interval_tree_remove+0xc75/0xec0 [ 113.374276] vma_prepare+0xc54/0x11a0 [ 113.374789] __split_vma+0x5af/0x950 [ 113.375300] ? __pfx___split_vma+0x10/0x10 [ 113.375871] ? find_held_lock+0x2c/0x110 [ 113.376462] do_vmi_align_munmap+0x2ba/0x11f0 [ 113.377065] ? lock_is_held_type+0x9f/0x120 [ 113.377638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 113.378286] ? mtree_range_walk+0x632/0x900 [ 113.378874] ? mas_walk+0x5c7/0x7c0 [ 113.379376] do_vmi_munmap+0x1f1/0x2b0 [ 113.379895] mmap_region+0x1f9/0x2660 [ 113.380433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 113.380978] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 113.381741] ? __pfx_lock_acquire+0x10/0x10 [ 113.382300] ? __pfx_mmap_region+0x10/0x10 [ 113.382870] ? security_mmap_addr+0x7d/0xa0 [ 113.383439] ? get_unmapped_area+0x1f5/0x3f0 [ 113.384038] do_mmap+0x854/0xf00 [ 113.384520] vm_mmap_pgoff+0x1a6/0x3a0 [ 113.385054] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 113.385650] ksys_mmap_pgoff+0x3af/0x500 [ 113.386198] do_syscall_64+0x3f/0x90 [ 113.386716] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 113.387400] RIP: 0033:0x7fae984e2d82 [ 113.387894] 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 [ 113.390171] RSP: 002b:00007ffff42516f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 113.391127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae984e2d82 [ 113.392055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae9791c000 [ 113.392959] RBP: 00007fae9791c000 R08: 0000000000000009 R09: 0000000000001000 [ 113.393860] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1412f5ec0 [ 113.394755] R13: 00007ffff4251710 R14: 00007ffff4251740 R15: 00007ffff4251aa0 [ 113.395666] [ 113.395973] [ 113.396222] Allocated by task 212: [ 113.396688] kasan_save_stack+0x22/0x50 [ 113.397221] kasan_set_track+0x25/0x30 [ 113.397759] __kasan_slab_alloc+0x59/0x70 [ 113.398319] kmem_cache_alloc+0x16b/0x370 [ 113.398873] vm_area_dup+0x20/0x160 [ 113.399372] __split_vma+0x170/0x950 [ 113.399866] split_vma+0xc6/0x110 [ 113.400364] mprotect_fixup+0x8d2/0xb30 [ 113.400906] do_mprotect_pkey+0x87e/0xd40 [ 113.401466] __x64_sys_mprotect+0x78/0xc0 [ 113.402027] do_syscall_64+0x3f/0x90 [ 113.402520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 113.403218] [ 113.403445] Freed by task 212: [ 113.403871] kasan_save_stack+0x22/0x50 [ 113.404427] kasan_set_track+0x25/0x30 [ 113.404950] kasan_save_free_info+0x2b/0x50 [ 113.405523] __kasan_slab_free+0x10a/0x190 [ 113.406091] kmem_cache_free+0x10d/0x4d0 [ 113.406635] rcu_core+0x8c8/0x2860 [ 113.407115] __do_softirq+0x1b7/0x7d4 [ 113.407628] [ 113.407853] Last potentially related work creation: [ 113.408494] kasan_save_stack+0x22/0x50 [ 113.409037] __kasan_record_aux_stack+0x8e/0xa0 [ 113.409642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 113.410336] remove_vma+0x139/0x170 [ 113.410808] do_vmi_align_munmap+0xd4a/0x11f0 [ 113.411403] do_vmi_munmap+0x1f1/0x2b0 [ 113.411918] __vm_munmap+0x138/0x3a0 [ 113.412438] __x64_sys_munmap+0x59/0x80 [ 113.412971] do_syscall_64+0x3f/0x90 [ 113.413482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 113.414162] [ 113.414385] The buggy address belongs to the object at ffff88800c4940e8 [ 113.414385] which belongs to the cache vm_area_struct of size 168 [ 113.415965] The buggy address is located 88 bytes inside of [ 113.415965] freed 168-byte region [ffff88800c4940e8, ffff88800c494190) [ 113.417536] [ 113.417763] The buggy address belongs to the physical page: [ 113.418467] page:00000000abdb2972 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc494 [ 113.419627] memcg:ffff888014112301 [ 113.420096] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 113.420840] page_type: 0xffffffff() [ 113.421321] raw: 0100000000000200 ffff88800879fc80 ffffea00003b90c0 dead000000000003 [ 113.422308] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014112301 [ 113.423281] page dumped because: kasan: bad access detected [ 113.423991] [ 113.424239] Memory state around the buggy address: [ 113.424866] ffff88800c494000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 113.425784] ffff88800c494080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 113.426704] >ffff88800c494100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 113.427630] ^ [ 113.428343] ffff88800c494180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 113.429250] ffff88800c494200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 113.430164] ================================================================== [ 113.431275] Disabling lock debugging due to kernel taint [ 115.929735] BUG: Bad rss-counter state mm:00000000fea1bfda type:MM_FILEPAGES val:33 [ 115.930265] BUG: Bad rss-counter state mm:00000000fea1bfda type:MM_ANONPAGES val:22 [ 116.389477] BUG: Bad rss-counter state mm:000000009ee46ef4 type:MM_FILEPAGES val:33 [ 116.390484] BUG: Bad rss-counter state mm:000000009ee46ef4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29026' (ECDSA) to the list of known hosts. 2023/06/19 19:25:37 fuzzer started 2023/06/19 19:25:38 dialing manager at localhost:44161 2023/06/19 19:25:38 checking machine... 2023/06/19 19:25:38 checking revisions... [ 117.125099] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:25:38 testing simple program... [ 117.169630] cgroup: Unknown subsys name 'net' [ 117.209421] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:24:23 Registers: info registers vcpu 0 RAX=ffff88800d4f0600 RBX=ffffea00003d3200 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000500cc2 RSP=ffff88800c6e7a88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000000 R13=ffff88800fd59b40 R14=ffffea00003d3200 R15=ffff88800c6e7b18 RIP=ffffffff81839252 RFL=00000202 [-------] 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 00007f7fdf707900 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=00005607a93e6e50 CR3=000000000fc00000 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=666e6f632e2a2f642e6769666e6f635f XMM02=5f434c20474e414c20766e4574706563 XMM03=6e65706f2f62696c2f7273752f097074 XMM04=6c636e490a0a0a0a0a0a0a0a0a0a0a0a XMM05=707466732f6873736e65706f2f62696c XMM06=736275530a0a0a2a5f434c20474e414c XMM07=0a0a0a0a0a0a0a0a0a0a0a0a6f6e2064 XMM08=676e6964726177726f463131580a0a0a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844984a5 RDX=dffffc0000000000 RSI=ffffffff844984a6 RDI=ffff88800beef050 RBP=ffff88800beef0a8 RSP=ffff88800beeefe0 R8 =0000000000000001 R9 =ffff88800beef090 R10=0000000000038001 R11=00000000000b3b35 R12=ffff88800beef0b0 R13=ffff88800beef098 R14=ffff88800beef091 R15=ffff88800beef050 RIP=ffffffff8113071f RFL=00000286 [--S--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 00007fc0856e3900 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=00007fc0856c2020 CR3=000000001be5e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000