syzkaller login: [ 29.056302] BUG: Bad rss-counter state mm:000000000cac7eed type:MM_FILEPAGES val:33 [ 29.057309] BUG: Bad rss-counter state mm:000000000cac7eed type:MM_ANONPAGES val:22 [ 29.228552] ================================================================== [ 29.229451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.230406] Read of size 8 at addr ffff88800e9cb310 by task sshd/221 [ 29.231304] [ 29.231517] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.232394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.233382] Call Trace: [ 29.233703] [ 29.233992] dump_stack_lvl+0x91/0xf0 [ 29.234495] print_report+0xcc/0x620 [ 29.234973] ? __virt_addr_valid+0x102/0x340 [ 29.235534] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.236150] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.236773] kasan_report+0xbe/0xf0 [ 29.237247] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.237882] vma_interval_tree_remove+0xc75/0xec0 [ 29.238497] vma_prepare+0xc54/0x11a0 [ 29.238973] __split_vma+0x5af/0x950 [ 29.239446] ? __pfx___split_vma+0x10/0x10 [ 29.239976] ? find_held_lock+0x2c/0x110 [ 29.240487] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.241047] ? lock_is_held_type+0x9f/0x120 [ 29.241579] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.242193] ? mtree_range_walk+0x632/0x900 [ 29.242747] ? mas_walk+0x5c7/0x7c0 [ 29.243222] do_vmi_munmap+0x1f1/0x2b0 [ 29.243711] mmap_region+0x1f9/0x2660 [ 29.244193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.244695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.245401] ? __pfx_lock_acquire+0x10/0x10 [ 29.245934] ? __pfx_mmap_region+0x10/0x10 [ 29.246460] ? security_mmap_addr+0x7d/0xa0 [ 29.246987] ? get_unmapped_area+0x1f5/0x3f0 [ 29.247529] do_mmap+0x854/0xf00 [ 29.247964] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.248455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.249018] ksys_mmap_pgoff+0x3af/0x500 [ 29.249524] do_syscall_64+0x3f/0x90 [ 29.249997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.250670] RIP: 0033:0x7fe2c7c23d82 [ 29.251135] 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 [ 29.253241] RSP: 002b:00007ffee8bbc628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.254150] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2c7c23d82 [ 29.254983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2c705d000 [ 29.255806] RBP: 00007fe2c705d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.256640] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c5dc4ab20 [ 29.257477] R13: 00007ffee8bbc640 R14: 00007ffee8bbc670 R15: 00007ffee8bbc9d0 [ 29.258328] [ 29.258616] [ 29.258831] Allocated by task 213: [ 29.259259] kasan_save_stack+0x22/0x50 [ 29.259756] kasan_set_track+0x25/0x30 [ 29.260242] __kasan_slab_alloc+0x59/0x70 [ 29.260759] kmem_cache_alloc+0x16b/0x370 [ 29.261280] vm_area_dup+0x20/0x160 [ 29.261729] __split_vma+0x170/0x950 [ 29.262221] split_vma+0xc6/0x110 [ 29.262652] mprotect_fixup+0x8d2/0xb30 [ 29.263148] do_mprotect_pkey+0x87e/0xd40 [ 29.263667] __x64_sys_mprotect+0x78/0xc0 [ 29.264182] do_syscall_64+0x3f/0x90 [ 29.264650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.265294] [ 29.265514] Freed by task 213: [ 29.265901] kasan_save_stack+0x22/0x50 [ 29.266400] kasan_set_track+0x25/0x30 [ 29.266888] kasan_save_free_info+0x2b/0x50 [ 29.267415] __kasan_slab_free+0x10a/0x190 [ 29.267945] kmem_cache_free+0x10d/0x4d0 [ 29.268447] rcu_core+0x8c8/0x2860 [ 29.268885] __do_softirq+0x1b7/0x7d4 [ 29.269359] [ 29.269570] Last potentially related work creation: [ 29.270165] kasan_save_stack+0x22/0x50 [ 29.270663] __kasan_record_aux_stack+0x8e/0xa0 [ 29.271244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.271881] remove_vma+0x139/0x170 [ 29.272402] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.272972] do_vmi_munmap+0x1f1/0x2b0 [ 29.273458] __vm_munmap+0x138/0x3a0 [ 29.273928] __x64_sys_munmap+0x59/0x80 [ 29.274432] do_syscall_64+0x3f/0x90 [ 29.274906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.275556] [ 29.275771] Second to last potentially related work creation: [ 29.276442] kasan_save_stack+0x22/0x50 [ 29.276932] __kasan_record_aux_stack+0x8e/0xa0 [ 29.277503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.278154] remove_vma+0x139/0x170 [ 29.278599] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.279149] do_vmi_munmap+0x1f1/0x2b0 [ 29.279628] mmap_region+0x1f9/0x2660 [ 29.280096] do_mmap+0x854/0xf00 [ 29.280523] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.281005] ksys_mmap_pgoff+0x3af/0x500 [ 29.281498] do_syscall_64+0x3f/0x90 [ 29.281963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.282600] [ 29.282810] The buggy address belongs to the object at ffff88800e9cb2b8 [ 29.282810] which belongs to the cache vm_area_struct of size 168 [ 29.284237] The buggy address is located 88 bytes inside of [ 29.284237] freed 168-byte region [ffff88800e9cb2b8, ffff88800e9cb360) [ 29.285603] [ 29.285817] The buggy address belongs to the physical page: [ 29.286481] page:00000000deced269 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9cb [ 29.287538] memcg:ffff88800d979101 [ 29.287953] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.288586] page_type: 0xffffffff() [ 29.289041] raw: 0100000000000200 ffff8880087a0c80 ffffea0000319880 dead000000000002 [ 29.289937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d979101 [ 29.290840] page dumped because: kasan: bad access detected [ 29.291491] [ 29.291703] Memory state around the buggy address: [ 29.292267] ffff88800e9cb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.293104] ffff88800e9cb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.293964] >ffff88800e9cb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.294828] ^ [ 29.295294] ffff88800e9cb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.296127] ffff88800e9cb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.296962] ================================================================== [ 29.297855] Disabling lock debugging due to kernel taint [ 32.018937] BUG: Bad rss-counter state mm:0000000069736fc2 type:MM_FILEPAGES val:33 [ 32.020099] BUG: Bad rss-counter state mm:0000000069736fc2 type:MM_ANONPAGES val:22 [ 32.352297] BUG: Bad rss-counter state mm:00000000044c687e type:MM_FILEPAGES val:33 [ 32.353879] BUG: Bad rss-counter state mm:00000000044c687e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37924' (ECDSA) to the list of known hosts. 2023/06/20 11:02:36 fuzzer started 2023/06/20 11:02:36 dialing manager at localhost:36067 2023/06/20 11:02:36 checking machine... 2023/06/20 11:02:36 checking revisions... [ 32.996763] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:02:36 testing simple program... [ 33.037685] cgroup: Unknown subsys name 'net' [ 33.089364] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:02:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff88800c353680 RSI=ffffffff8171b3b7 RDI=ffffffff8171b3bc RBP=ffff88800c42c000 RSP=ffff8880146d7e60 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000200 R11=00000000000b6d53 R12=0000000000004000 R13=00007f7e1c6e05a0 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff815343ab RFL=00000093 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7e1d24f900 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=00007f7e1c6e05a0 CR3=000000000d508000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=161d12cad8ac883500000000000ae988 XMM05=db8a230e6c64bab10000000000133d78 XMM06=e4cb8bb95a7664b60000000000132ec0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800eb4e540 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800eb4e544 RBP=1ffff11003070f96 RSP=ffff888018387ca8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=800000001c3c4005 R13=ffffffff852c61f8 R14=000000000f74d007 R15=000000001b9e9067 RIP=ffffffff812e0072 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1cb07d7900 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=00007f1cb0d8e618 CR3=0000000018124000 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=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