syzkaller login: [ 31.094887] BUG: Bad rss-counter state mm:0000000054df7eed type:MM_FILEPAGES val:33 [ 31.096340] BUG: Bad rss-counter state mm:0000000054df7eed type:MM_ANONPAGES val:22 [ 31.252982] ================================================================== [ 31.253910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.254848] Read of size 8 at addr ffff888014347a50 by task sshd/219 [ 31.255712] [ 31.255928] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.256810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.257781] Call Trace: [ 31.258098] [ 31.258384] dump_stack_lvl+0x91/0xf0 [ 31.258876] print_report+0xcc/0x620 [ 31.259356] ? __virt_addr_valid+0x102/0x340 [ 31.259908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260534] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261153] kasan_report+0xbe/0xf0 [ 31.261627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262250] vma_interval_tree_remove+0xc75/0xec0 [ 31.262856] vma_prepare+0xc54/0x11a0 [ 31.263330] __split_vma+0x5af/0x950 [ 31.263800] ? __pfx___split_vma+0x10/0x10 [ 31.264363] ? find_held_lock+0x2c/0x110 [ 31.264887] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.265460] ? lock_is_held_type+0x9f/0x120 [ 31.265994] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.266607] ? mtree_range_walk+0x632/0x900 [ 31.267156] ? mas_walk+0x5c7/0x7c0 [ 31.267631] do_vmi_munmap+0x1f1/0x2b0 [ 31.268121] mmap_region+0x1f9/0x2660 [ 31.268615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.269142] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.269865] ? __pfx_lock_acquire+0x10/0x10 [ 31.270404] ? __pfx_mmap_region+0x10/0x10 [ 31.270938] ? security_mmap_addr+0x7d/0xa0 [ 31.271476] ? get_unmapped_area+0x1f5/0x3f0 [ 31.272025] do_mmap+0x854/0xf00 [ 31.272495] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.272990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.273563] ksys_mmap_pgoff+0x3af/0x500 [ 31.274078] do_syscall_64+0x3f/0x90 [ 31.274556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275218] RIP: 0033:0x7f3147ddbd82 [ 31.275680] 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 [ 31.277843] RSP: 002b:00007ffe3f2f4988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.278798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3147ddbd82 [ 31.279665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3147215000 [ 31.280574] RBP: 00007f3147215000 R08: 0000000000000009 R09: 0000000000001000 [ 31.281417] R10: 0000000000000812 R11: 0000000000000206 R12: 000055904cbb1f70 [ 31.282268] R13: 00007ffe3f2f49a0 R14: 00007ffe3f2f49d0 R15: 00007ffe3f2f4d30 [ 31.283123] [ 31.283419] [ 31.283637] Allocated by task 212: [ 31.284071] kasan_save_stack+0x22/0x50 [ 31.284585] kasan_set_track+0x25/0x30 [ 31.285083] __kasan_slab_alloc+0x59/0x70 [ 31.285611] kmem_cache_alloc+0x16b/0x370 [ 31.286125] vm_area_dup+0x20/0x160 [ 31.286588] __split_vma+0x170/0x950 [ 31.287062] split_vma+0xc6/0x110 [ 31.287507] mprotect_fixup+0x8d2/0xb30 [ 31.288007] do_mprotect_pkey+0x87e/0xd40 [ 31.288552] __x64_sys_mprotect+0x78/0xc0 [ 31.289073] do_syscall_64+0x3f/0x90 [ 31.289548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290213] [ 31.290427] Freed by task 212: [ 31.290820] kasan_save_stack+0x22/0x50 [ 31.291326] kasan_set_track+0x25/0x30 [ 31.291822] kasan_save_free_info+0x2b/0x50 [ 31.292360] __kasan_slab_free+0x10a/0x190 [ 31.292897] kmem_cache_free+0x10d/0x4d0 [ 31.293407] rcu_core+0x8c8/0x2860 [ 31.293859] __do_softirq+0x1b7/0x7d4 [ 31.294336] [ 31.294553] Last potentially related work creation: [ 31.295136] kasan_save_stack+0x22/0x50 [ 31.295645] __kasan_record_aux_stack+0x8e/0xa0 [ 31.296220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.296889] remove_vma+0x139/0x170 [ 31.297345] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.297904] do_vmi_munmap+0x1f1/0x2b0 [ 31.298401] __vm_munmap+0x138/0x3a0 [ 31.298877] __x64_sys_munmap+0x59/0x80 [ 31.299378] do_syscall_64+0x3f/0x90 [ 31.299860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300521] [ 31.300741] The buggy address belongs to the object at ffff8880143479f8 [ 31.300741] which belongs to the cache vm_area_struct of size 168 [ 31.302209] The buggy address is located 88 bytes inside of [ 31.302209] freed 168-byte region [ffff8880143479f8, ffff888014347aa0) [ 31.303614] [ 31.303834] The buggy address belongs to the physical page: [ 31.304503] page:00000000e81c919b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14347 [ 31.305602] memcg:ffff8880180c1c01 [ 31.306027] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.306680] page_type: 0xffffffff() [ 31.307131] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.308049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180c1c01 [ 31.308964] page dumped because: kasan: bad access detected [ 31.309638] [ 31.309856] Memory state around the buggy address: [ 31.310434] ffff888014347900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.311291] ffff888014347980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.312151] >ffff888014347a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.313017] ^ [ 31.313724] ffff888014347a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.314596] ffff888014347b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.315446] ================================================================== [ 31.316484] Disabling lock debugging due to kernel taint [ 33.235774] BUG: Bad rss-counter state mm:0000000093f001f8 type:MM_FILEPAGES val:33 [ 33.236795] BUG: Bad rss-counter state mm:0000000093f001f8 type:MM_ANONPAGES val:22 [ 33.677473] BUG: Bad rss-counter state mm:000000008a2961fd type:MM_FILEPAGES val:33 [ 33.678472] BUG: Bad rss-counter state mm:000000008a2961fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3207' (ECDSA) to the list of known hosts. 2023/06/19 22:36:47 fuzzer started 2023/06/19 22:36:47 dialing manager at localhost:44161 2023/06/19 22:36:47 checking machine... 2023/06/19 22:36:47 checking revisions... [ 34.399617] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:36:47 testing simple program... [ 34.453745] cgroup: Unknown subsys name 'net' [ 34.493030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:36:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8366cbd8 RDX=00000000000266cb RSI=00000000000266cb RDI=ffffffff865816ec RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000008b39b R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f253b96e900 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=00007f253bf25618 CR3=000000001a14a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007f334fbac000 CR3=0000000014210000 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=ef6e80d5b373468d2b4e7d50db5446c3 XMM02=2c67c8bc2e329bc3000000000011c5c8 XMM03=fb795ef6d65770560000000000123f48 XMM04=8c4be5d218a69a8e00000000000ae988 XMM05=04fcda165cb19a730000000000134898 XMM06=806171799158d9670000000000133938 XMM07=e042d86d42eb936e00000000001241c8 XMM08=f26d25f15d558ebf000000000011c628 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000