syzkaller login: [ 39.083948] BUG: Bad rss-counter state mm:000000000474489b type:MM_FILEPAGES val:33 [ 39.085921] BUG: Bad rss-counter state mm:000000000474489b type:MM_ANONPAGES val:22 [ 39.259095] ================================================================== [ 39.260056] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.261046] Read of size 8 at addr ffff88800a6ed798 by task sshd/219 [ 39.261963] [ 39.262199] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.263111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.264161] Call Trace: [ 39.264499] [ 39.264798] dump_stack_lvl+0x91/0xf0 [ 39.265315] print_report+0xcc/0x620 [ 39.265831] ? __virt_addr_valid+0x102/0x340 [ 39.266419] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.267072] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.267731] kasan_report+0xbe/0xf0 [ 39.268246] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.268901] vma_interval_tree_remove+0xc75/0xec0 [ 39.269537] vma_prepare+0xc54/0x11a0 [ 39.270049] __split_vma+0x5af/0x950 [ 39.270548] ? __pfx___split_vma+0x10/0x10 [ 39.271107] ? find_held_lock+0x2c/0x110 [ 39.271658] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.272271] ? lock_is_held_type+0x9f/0x120 [ 39.272839] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.273481] ? mtree_range_walk+0x632/0x900 [ 39.274065] ? mas_walk+0x5c7/0x7c0 [ 39.274566] do_vmi_munmap+0x1f1/0x2b0 [ 39.275091] mmap_region+0x1f9/0x2660 [ 39.275599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.276160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.276909] ? __pfx_lock_acquire+0x10/0x10 [ 39.277522] ? __pfx_mmap_region+0x10/0x10 [ 39.278093] ? security_mmap_addr+0x7d/0xa0 [ 39.278676] ? get_unmapped_area+0x1f5/0x3f0 [ 39.279274] do_mmap+0x854/0xf00 [ 39.279741] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.280272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.280875] ksys_mmap_pgoff+0x3af/0x500 [ 39.281409] do_syscall_64+0x3f/0x90 [ 39.281924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.282606] RIP: 0033:0x7fecb2700d82 [ 39.283090] 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 [ 39.285374] RSP: 002b:00007ffecc50ad98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.286405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fecb2700d82 [ 39.287331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fecb1b3a000 [ 39.288237] RBP: 00007fecb1b3a000 R08: 0000000000000009 R09: 0000000000001000 [ 39.289174] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564083bd2ec0 [ 39.290107] R13: 00007ffecc50adb0 R14: 00007ffecc50ade0 R15: 00007ffecc50b140 [ 39.291052] [ 39.291372] [ 39.291607] Allocated by task 212: [ 39.292094] kasan_save_stack+0x22/0x50 [ 39.292643] kasan_set_track+0x25/0x30 [ 39.293180] __kasan_slab_alloc+0x59/0x70 [ 39.293751] kmem_cache_alloc+0x16b/0x370 [ 39.294321] vm_area_dup+0x20/0x160 [ 39.294819] __split_vma+0x170/0x950 [ 39.295331] split_vma+0xc6/0x110 [ 39.295813] mprotect_fixup+0x8d2/0xb30 [ 39.296374] do_mprotect_pkey+0x87e/0xd40 [ 39.296950] __x64_sys_mprotect+0x78/0xc0 [ 39.297520] do_syscall_64+0x3f/0x90 [ 39.298037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.298737] [ 39.298973] Freed by task 212: [ 39.299402] kasan_save_stack+0x22/0x50 [ 39.299954] kasan_set_track+0x25/0x30 [ 39.300523] kasan_save_free_info+0x2b/0x50 [ 39.301111] __kasan_slab_free+0x10a/0x190 [ 39.301695] kmem_cache_free+0x10d/0x4d0 [ 39.302255] rcu_core+0x8c8/0x2860 [ 39.302741] __do_softirq+0x1b7/0x7d4 [ 39.303264] [ 39.303502] Last potentially related work creation: [ 39.304152] kasan_save_stack+0x22/0x50 [ 39.304714] __kasan_record_aux_stack+0x8e/0xa0 [ 39.305347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.306055] remove_vma+0x139/0x170 [ 39.306551] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.307164] do_vmi_munmap+0x1f1/0x2b0 [ 39.307699] __vm_munmap+0x138/0x3a0 [ 39.308224] __x64_sys_munmap+0x59/0x80 [ 39.308769] do_syscall_64+0x3f/0x90 [ 39.309291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.309997] [ 39.310233] The buggy address belongs to the object at ffff88800a6ed740 [ 39.310233] which belongs to the cache vm_area_struct of size 168 [ 39.311857] The buggy address is located 88 bytes inside of [ 39.311857] freed 168-byte region [ffff88800a6ed740, ffff88800a6ed7e8) [ 39.313426] [ 39.313664] The buggy address belongs to the physical page: [ 39.314382] page:000000004b0ec115 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa6ed [ 39.315566] memcg:ffff88800e7cc301 [ 39.316040] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.316749] page_type: 0xffffffff() [ 39.317240] raw: 0100000000000200 ffff88800879fc80 ffffea00005c01c0 dead000000000004 [ 39.318255] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7cc301 [ 39.319246] page dumped because: kasan: bad access detected [ 39.319977] [ 39.320233] Memory state around the buggy address: [ 39.320862] ffff88800a6ed680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.321805] ffff88800a6ed700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.322716] >ffff88800a6ed780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.323614] ^ [ 39.324144] ffff88800a6ed800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.325045] ffff88800a6ed880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.325924] ================================================================== [ 39.327114] Disabling lock debugging due to kernel taint [ 41.292735] BUG: Bad rss-counter state mm:00000000607cc154 type:MM_FILEPAGES val:33 [ 41.294016] BUG: Bad rss-counter state mm:00000000607cc154 type:MM_ANONPAGES val:22 [ 41.704375] BUG: Bad rss-counter state mm:000000003d7f4a87 type:MM_FILEPAGES val:33 [ 41.705543] BUG: Bad rss-counter state mm:000000003d7f4a87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22095' (ECDSA) to the list of known hosts. 2023/06/19 13:52:16 fuzzer started 2023/06/19 13:52:16 dialing manager at localhost:44161 2023/06/19 13:52:17 checking machine... 2023/06/19 13:52:17 checking revisions... [ 42.401654] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:52:17 testing simple program... [ 42.450527] cgroup: Unknown subsys name 'net' [ 42.510597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:52:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888014667d90 RCX=0000000000000000 RDX=ffff888014669b40 RSI=ffffffff816213fe RDI=ffffea0000617180 RBP=ffffea0000617180 RSP=ffff888014667ba0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff88801619d418 R13=000000001616ce00 R14=ffff88800e492740 R15=0000000000000001 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7dee744900 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=00007f7dedbbbae0 CR3=000000000c75c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fe9ba51b27fbc00800000000000ae988 XMM05=0fe1495220dd19ed0000000000134200 XMM06=c0f320e1f8776b5d0000000000132f38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff1100339af6b RCX=0000000000000000 RDX=ffff888016b50000 RSI=ffffffff844f8a28 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888019cd7b50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800ca2bb80 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff812d860e RFL=00000293 [--S-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 00007f18b069f900 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=00007f18b0c570b0 CR3=000000001703e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000