syzkaller login: [ 33.118302] BUG: Bad rss-counter state mm:00000000b221eb5e type:MM_FILEPAGES val:33 [ 33.119503] BUG: Bad rss-counter state mm:00000000b221eb5e type:MM_ANONPAGES val:22 [ 33.273538] ================================================================== [ 33.274620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.275739] Read of size 8 at addr ffff888019c6fc20 by task sshd/220 [ 33.276757] [ 33.277061] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.277936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.278910] Call Trace: [ 33.279254] [ 33.279541] dump_stack_lvl+0x91/0xf0 [ 33.280028] print_report+0xcc/0x620 [ 33.280525] ? __virt_addr_valid+0x102/0x340 [ 33.281097] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.281725] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.282363] kasan_report+0xbe/0xf0 [ 33.282840] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.283463] vma_interval_tree_remove+0xc75/0xec0 [ 33.284088] vma_prepare+0xc54/0x11a0 [ 33.284567] __split_vma+0x5af/0x950 [ 33.285070] ? __pfx___split_vma+0x10/0x10 [ 33.285594] ? find_held_lock+0x2c/0x110 [ 33.286112] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.286683] ? lock_is_held_type+0x9f/0x120 [ 33.287221] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.287824] ? mtree_range_walk+0x632/0x900 [ 33.288369] ? mas_walk+0x5c7/0x7c0 [ 33.288850] do_vmi_munmap+0x1f1/0x2b0 [ 33.289366] mmap_region+0x1f9/0x2660 [ 33.289849] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.290375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.291087] ? __pfx_lock_acquire+0x10/0x10 [ 33.291639] ? __pfx_mmap_region+0x10/0x10 [ 33.292185] ? security_mmap_addr+0x7d/0xa0 [ 33.292732] ? get_unmapped_area+0x1f5/0x3f0 [ 33.293293] do_mmap+0x854/0xf00 [ 33.293739] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.294256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.294822] ksys_mmap_pgoff+0x3af/0x500 [ 33.295348] do_syscall_64+0x3f/0x90 [ 33.295830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.296490] RIP: 0033:0x7fed870f6d82 [ 33.296982] 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 [ 33.299142] RSP: 002b:00007ffe906aee78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.300053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed870f6d82 [ 33.300906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed86530000 [ 33.301764] RBP: 00007fed86530000 R08: 0000000000000009 R09: 0000000000001000 [ 33.302619] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b9d588cb20 [ 33.303480] R13: 00007ffe906aee90 R14: 00007ffe906aeec0 R15: 00007ffe906af220 [ 33.304346] [ 33.304643] [ 33.304865] Allocated by task 213: [ 33.305308] kasan_save_stack+0x22/0x50 [ 33.305822] kasan_set_track+0x25/0x30 [ 33.306314] __kasan_slab_alloc+0x59/0x70 [ 33.306840] kmem_cache_alloc+0x16b/0x370 [ 33.307352] vm_area_dup+0x20/0x160 [ 33.307812] __split_vma+0x170/0x950 [ 33.308291] split_vma+0xc6/0x110 [ 33.308739] mprotect_fixup+0x8d2/0xb30 [ 33.309265] do_mprotect_pkey+0x87e/0xd40 [ 33.309793] __x64_sys_mprotect+0x78/0xc0 [ 33.310321] do_syscall_64+0x3f/0x90 [ 33.310796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.311438] [ 33.311659] Freed by task 210: [ 33.312052] kasan_save_stack+0x22/0x50 [ 33.312562] kasan_set_track+0x25/0x30 [ 33.313072] kasan_save_free_info+0x2b/0x50 [ 33.313617] __kasan_slab_free+0x10a/0x190 [ 33.314153] kmem_cache_free+0x10d/0x4d0 [ 33.314663] rcu_core+0x8c8/0x2860 [ 33.315114] __do_softirq+0x1b7/0x7d4 [ 33.315592] [ 33.315807] Last potentially related work creation: [ 33.316401] kasan_save_stack+0x22/0x50 [ 33.316908] __kasan_record_aux_stack+0x8e/0xa0 [ 33.317494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.318147] remove_vma+0x139/0x170 [ 33.318683] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.319250] do_vmi_munmap+0x1f1/0x2b0 [ 33.319737] __vm_munmap+0x138/0x3a0 [ 33.320212] __x64_sys_munmap+0x59/0x80 [ 33.320707] do_syscall_64+0x3f/0x90 [ 33.321192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.321834] [ 33.322048] The buggy address belongs to the object at ffff888019c6fbc8 [ 33.322048] which belongs to the cache vm_area_struct of size 168 [ 33.323526] The buggy address is located 88 bytes inside of [ 33.323526] freed 168-byte region [ffff888019c6fbc8, ffff888019c6fc70) [ 33.324932] [ 33.325172] The buggy address belongs to the physical page: [ 33.325840] page:000000005217937f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c6f [ 33.326937] memcg:ffff88800e3f4101 [ 33.327369] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.328012] page_type: 0xffffffff() [ 33.328463] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.329426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3f4101 [ 33.330335] page dumped because: kasan: bad access detected [ 33.330996] [ 33.331211] Memory state around the buggy address: [ 33.331784] ffff888019c6fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.332636] ffff888019c6fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.333497] >ffff888019c6fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.334350] ^ [ 33.334876] ffff888019c6fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.335735] ffff888019c6fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.336586] ================================================================== [ 33.337548] Disabling lock debugging due to kernel taint [ 35.563406] BUG: Bad rss-counter state mm:000000001b4514a4 type:MM_FILEPAGES val:33 [ 35.564428] BUG: Bad rss-counter state mm:000000001b4514a4 type:MM_ANONPAGES val:22 [ 36.030900] BUG: Bad rss-counter state mm:00000000491aaec4 type:MM_FILEPAGES val:33 [ 36.032063] BUG: Bad rss-counter state mm:00000000491aaec4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38693' (ECDSA) to the list of known hosts. 2023/06/20 07:23:40 fuzzer started 2023/06/20 07:23:40 dialing manager at localhost:44161 2023/06/20 07:23:40 checking machine... 2023/06/20 07:23:40 checking revisions... [ 36.730377] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:23:40 testing simple program... [ 36.779224] cgroup: Unknown subsys name 'net' [ 36.849576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:23:37 Registers: info registers vcpu 0 RAX=ffffffff85d3d010 RBX=ffff88806ce3a2c0 RCX=ffffffff812e00e5 RDX=1ffffffff0ac2cf3 RSI=ffff88806ce3a2c0 RDI=ffffffff85616740 RBP=ffff88806ce3a2d8 RSP=ffff88806ce09e60 R8 =ffffffff85616740 R9 =0000000000000246 R10=ffffffff85616780 R11=0000000000000001 R12=ffffffff85616740 R13=0000000000000001 R14=0000000000000200 R15=0000000000000000 RIP=ffffffff813697a7 RFL=00000046 [---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 00007f1e00114900 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=00005582b0dc9318 CR3=000000000d5f8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=df47a498716a206300000000000ae988 XMM05=3863be692accb77d0000000000134c20 XMM06=4fda316b135da52b0000000000133cc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff888015c5d1c0 RSI=0000000000080000 RDI=0000000000000002 RBP=0000000016ab0020 RSP=ffff888014767ca8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000080000 R14=0000000000000000 R15=ffffffff85d3ce80 RIP=ffffffff811431b3 RFL=00000213 [----A-C] 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 00007f5953a4c900 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=00007f59540040b0 CR3=000000000f2f8000 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