syzkaller login: [ 40.852046] BUG: Bad rss-counter state mm:000000003ab4dda5 type:MM_FILEPAGES val:33 [ 40.853120] BUG: Bad rss-counter state mm:000000003ab4dda5 type:MM_ANONPAGES val:22 [ 40.892494] ================================================================== [ 40.893528] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.894556] Read of size 8 at addr ffff88800ead5228 by task sshd/220 [ 40.895510] [ 40.895729] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.896675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.897745] Call Trace: [ 40.898125] [ 40.898418] dump_stack_lvl+0x91/0xf0 [ 40.898968] print_report+0xcc/0x620 [ 40.899515] ? __virt_addr_valid+0x102/0x340 [ 40.900108] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.900753] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.901438] kasan_report+0xbe/0xf0 [ 40.901918] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.902692] vma_interval_tree_remove+0xc75/0xec0 [ 40.903305] vma_prepare+0xc54/0x11a0 [ 40.903796] __split_vma+0x5af/0x950 [ 40.904276] ? __pfx___split_vma+0x10/0x10 [ 40.904803] ? find_held_lock+0x2c/0x110 [ 40.905326] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.905886] ? lock_is_held_type+0x9f/0x120 [ 40.906416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.907020] ? mtree_range_walk+0x632/0x900 [ 40.907603] ? mas_walk+0x5c7/0x7c0 [ 40.908076] do_vmi_munmap+0x1f1/0x2b0 [ 40.908565] mmap_region+0x1f9/0x2660 [ 40.909042] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.909553] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.910265] ? __pfx_lock_acquire+0x10/0x10 [ 40.910794] ? __pfx_mmap_region+0x10/0x10 [ 40.911326] ? security_mmap_addr+0x7d/0xa0 [ 40.911864] ? get_unmapped_area+0x1f5/0x3f0 [ 40.912415] do_mmap+0x854/0xf00 [ 40.912852] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.913354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.913908] ksys_mmap_pgoff+0x3af/0x500 [ 40.914418] do_syscall_64+0x3f/0x90 [ 40.914897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.915575] RIP: 0033:0x7f25186ffd82 [ 40.916032] 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 [ 40.918146] RSP: 002b:00007ffc84c577c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.919070] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25186ffd82 [ 40.919920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2517b39000 [ 40.920758] RBP: 00007f2517b39000 R08: 0000000000000009 R09: 0000000000001000 [ 40.921597] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f506ed8ec0 [ 40.922439] R13: 00007ffc84c577e0 R14: 00007ffc84c57810 R15: 00007ffc84c57b70 [ 40.923297] [ 40.923600] [ 40.923816] Allocated by task 213: [ 40.924248] kasan_save_stack+0x22/0x50 [ 40.924753] kasan_set_track+0x25/0x30 [ 40.925248] __kasan_slab_alloc+0x59/0x70 [ 40.925771] kmem_cache_alloc+0x16b/0x370 [ 40.926285] vm_area_dup+0x20/0x160 [ 40.926746] __split_vma+0x170/0x950 [ 40.927214] split_vma+0xc6/0x110 [ 40.927665] mprotect_fixup+0x8d2/0xb30 [ 40.928167] do_mprotect_pkey+0x87e/0xd40 [ 40.928682] __x64_sys_mprotect+0x78/0xc0 [ 40.929203] do_syscall_64+0x3f/0x90 [ 40.929679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.930317] [ 40.930538] Freed by task 213: [ 40.930928] kasan_save_stack+0x22/0x50 [ 40.931433] kasan_set_track+0x25/0x30 [ 40.931926] kasan_save_free_info+0x2b/0x50 [ 40.932460] __kasan_slab_free+0x10a/0x190 [ 40.932993] kmem_cache_free+0x10d/0x4d0 [ 40.933502] rcu_core+0x8c8/0x2860 [ 40.933943] __do_softirq+0x1b7/0x7d4 [ 40.934414] [ 40.934625] Last potentially related work creation: [ 40.935207] kasan_save_stack+0x22/0x50 [ 40.935730] __kasan_record_aux_stack+0x8e/0xa0 [ 40.936302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.936944] remove_vma+0x139/0x170 [ 40.937431] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.938008] do_vmi_munmap+0x1f1/0x2b0 [ 40.938497] __vm_munmap+0x138/0x3a0 [ 40.938969] __x64_sys_munmap+0x59/0x80 [ 40.939478] do_syscall_64+0x3f/0x90 [ 40.939953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.940586] [ 40.940802] The buggy address belongs to the object at ffff88800ead51d0 [ 40.940802] which belongs to the cache vm_area_struct of size 168 [ 40.942271] The buggy address is located 88 bytes inside of [ 40.942271] freed 168-byte region [ffff88800ead51d0, ffff88800ead5278) [ 40.943674] [ 40.943890] The buggy address belongs to the physical page: [ 40.944557] page:00000000192e78df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xead5 [ 40.945625] memcg:ffff88801a156d01 [ 40.946051] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.946694] page_type: 0xffffffff() [ 40.947147] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.948080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a156d01 [ 40.948988] page dumped because: kasan: bad access detected [ 40.949642] [ 40.949859] Memory state around the buggy address: [ 40.950433] ffff88800ead5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.951286] ffff88800ead5180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.952148] >ffff88800ead5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.952995] ^ [ 40.953557] ffff88800ead5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.954411] ffff88800ead5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.955256] ================================================================== [ 40.956198] Disabling lock debugging due to kernel taint [ 42.997999] BUG: Bad rss-counter state mm:000000002917121c type:MM_FILEPAGES val:33 [ 42.999189] BUG: Bad rss-counter state mm:000000002917121c type:MM_ANONPAGES val:22 [ 43.412326] BUG: Bad rss-counter state mm:00000000335fcfe0 type:MM_FILEPAGES val:33 [ 43.413357] BUG: Bad rss-counter state mm:00000000335fcfe0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46705' (ECDSA) to the list of known hosts. 2023/06/20 07:12:36 fuzzer started 2023/06/20 07:12:36 dialing manager at localhost:44161 2023/06/20 07:12:36 checking machine... 2023/06/20 07:12:36 checking revisions... [ 44.153931] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:12:36 testing simple program... [ 44.202354] cgroup: Unknown subsys name 'net' [ 44.254912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:12:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff813bde72 RDI=ffff88800847e02c RBP=ffff88806ce39500 RSP=ffff88806ce09d30 R8 =ffff88806ce39f70 R9 =0000000000013192 R10=0000000000013192 R11=0000000000000001 R12=0000000000039500 R13=ffff88800847e000 R14=ffff888016653680 R15=ffff88806ce395c0 RIP=ffffffff8125e6d8 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 00007f14503e8900 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=00007f145099f618 CR3=000000000906e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000005cba4641 RBX=ffffffff849f4904 RCX=1ffffffff093e920 RDX=ffff88800ff83680 RSI=0000000000000000 RDI=ffff888018ea7cdc RBP=000000000000000f RSP=ffff8880187ef550 R8 =0000000000000006 R9 =000000000000000f R10=000000000000000b R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2c00 R14=000000000000000b R15=ffff888018ea7cd8 RIP=ffffffff8219ddf6 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 00007f50f254e700 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=00007f468c06f350 CR3=0000000016a84000 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=2035333a32313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a32313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000