syzkaller login: [ 28.757333] BUG: Bad rss-counter state mm:00000000004328bc type:MM_FILEPAGES val:33 [ 28.758755] BUG: Bad rss-counter state mm:00000000004328bc type:MM_ANONPAGES val:22 [ 28.925726] ================================================================== [ 28.926641] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.927604] Read of size 8 at addr ffff88800da68c20 by task sshd/222 [ 28.928381] [ 28.928603] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.929608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.930598] Call Trace: [ 28.930931] [ 28.931239] dump_stack_lvl+0x91/0xf0 [ 28.931753] print_report+0xcc/0x620 [ 28.932251] ? __virt_addr_valid+0x102/0x340 [ 28.932826] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.933449] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.934087] kasan_report+0xbe/0xf0 [ 28.934567] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.935196] vma_interval_tree_remove+0xc75/0xec0 [ 28.935830] vma_prepare+0xc54/0x11a0 [ 28.936311] __split_vma+0x5af/0x950 [ 28.936781] ? __pfx___split_vma+0x10/0x10 [ 28.937311] ? find_held_lock+0x2c/0x110 [ 28.937838] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.938402] ? lock_is_held_type+0x9f/0x120 [ 28.938946] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.939554] ? mtree_range_walk+0x632/0x900 [ 28.940128] ? mas_walk+0x5c7/0x7c0 [ 28.940603] do_vmi_munmap+0x1f1/0x2b0 [ 28.941095] mmap_region+0x1f9/0x2660 [ 28.941612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.942157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.942864] ? __pfx_lock_acquire+0x10/0x10 [ 28.943390] ? __pfx_mmap_region+0x10/0x10 [ 28.943943] ? security_mmap_addr+0x7d/0xa0 [ 28.944470] ? get_unmapped_area+0x1f5/0x3f0 [ 28.945018] do_mmap+0x854/0xf00 [ 28.945455] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.945945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.946515] ksys_mmap_pgoff+0x3af/0x500 [ 28.947018] do_syscall_64+0x3f/0x90 [ 28.947495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.948143] RIP: 0033:0x7fd4387dbd82 [ 28.948599] 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 [ 28.950710] RSP: 002b:00007ffe6d9729a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.951626] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4387dbd82 [ 28.952471] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd437c15000 [ 28.953306] RBP: 00007fd437c15000 R08: 0000000000000009 R09: 0000000000001000 [ 28.954143] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ddcd90f70 [ 28.954982] R13: 00007ffe6d9729c0 R14: 00007ffe6d9729f0 R15: 00007ffe6d972d50 [ 28.955852] [ 28.956141] [ 28.956355] Allocated by task 214: [ 28.956782] kasan_save_stack+0x22/0x50 [ 28.957283] kasan_set_track+0x25/0x30 [ 28.957776] __kasan_slab_alloc+0x59/0x70 [ 28.958304] kmem_cache_alloc+0x16b/0x370 [ 28.958819] vm_area_dup+0x20/0x160 [ 28.959271] __split_vma+0x170/0x950 [ 28.959746] split_vma+0xc6/0x110 [ 28.960183] mprotect_fixup+0x8d2/0xb30 [ 28.960681] do_mprotect_pkey+0x87e/0xd40 [ 28.961198] __x64_sys_mprotect+0x78/0xc0 [ 28.961717] do_syscall_64+0x3f/0x90 [ 28.962191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.962831] [ 28.963047] Freed by task 214: [ 28.963434] kasan_save_stack+0x22/0x50 [ 28.963956] kasan_set_track+0x25/0x30 [ 28.964454] kasan_save_free_info+0x2b/0x50 [ 28.964988] __kasan_slab_free+0x10a/0x190 [ 28.965517] kmem_cache_free+0x10d/0x4d0 [ 28.966025] rcu_core+0x8c8/0x2860 [ 28.966464] __do_softirq+0x1b7/0x7d4 [ 28.966939] [ 28.967157] Last potentially related work creation: [ 28.967749] kasan_save_stack+0x22/0x50 [ 28.968251] __kasan_record_aux_stack+0x8e/0xa0 [ 28.968832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.969481] remove_vma+0x139/0x170 [ 28.969929] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.970570] do_vmi_munmap+0x1f1/0x2b0 [ 28.971062] __vm_munmap+0x138/0x3a0 [ 28.971536] __x64_sys_munmap+0x59/0x80 [ 28.972048] do_syscall_64+0x3f/0x90 [ 28.972525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.973175] [ 28.973405] Second to last potentially related work creation: [ 28.974093] kasan_save_stack+0x22/0x50 [ 28.974606] __kasan_record_aux_stack+0x8e/0xa0 [ 28.975179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.975859] remove_vma+0x139/0x170 [ 28.976314] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.976889] do_vmi_munmap+0x1f1/0x2b0 [ 28.977376] __vm_munmap+0x138/0x3a0 [ 28.977845] __x64_sys_munmap+0x59/0x80 [ 28.978350] do_syscall_64+0x3f/0x90 [ 28.978831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.979469] [ 28.979698] The buggy address belongs to the object at ffff88800da68bc8 [ 28.979698] which belongs to the cache vm_area_struct of size 168 [ 28.981155] The buggy address is located 88 bytes inside of [ 28.981155] freed 168-byte region [ffff88800da68bc8, ffff88800da68c70) [ 28.982541] [ 28.982756] The buggy address belongs to the physical page: [ 28.983409] page:00000000847a6d3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda68 [ 28.984508] memcg:ffff88800eb62201 [ 28.984939] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.985589] page_type: 0xffffffff() [ 28.986040] raw: 0100000000000200 ffff8880087a0c80 ffffea00003693c0 dead000000000002 [ 28.986950] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb62201 [ 28.987859] page dumped because: kasan: bad access detected [ 28.988513] [ 28.988729] Memory state around the buggy address: [ 28.989302] ffff88800da68b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.990152] ffff88800da68b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.990995] >ffff88800da68c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.991857] ^ [ 28.992389] ffff88800da68c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.993238] ffff88800da68d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.994086] ================================================================== [ 28.995028] Disabling lock debugging due to kernel taint [ 30.775961] BUG: Bad rss-counter state mm:00000000af6dc065 type:MM_FILEPAGES val:33 [ 30.776759] BUG: Bad rss-counter state mm:00000000af6dc065 type:MM_ANONPAGES val:22 [ 31.180311] BUG: Bad rss-counter state mm:000000008bab3d59 type:MM_FILEPAGES val:33 [ 31.181023] BUG: Bad rss-counter state mm:000000008bab3d59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14744' (ECDSA) to the list of known hosts. 2023/06/21 02:21:21 fuzzer started 2023/06/21 02:21:21 dialing manager at localhost:36067 2023/06/21 02:21:21 checking machine... 2023/06/21 02:21:21 checking revisions... [ 31.895761] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:21:21 testing simple program... [ 31.946163] cgroup: Unknown subsys name 'net' [ 32.002676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:21:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888018f4f3c0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff110031e9e79 RIP=ffffffff845368c8 RFL=00000002 [-------] 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 00007f61c918c900 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=00007f61c9743618 CR3=000000000e8a8000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f713c5f04d0 CR3=000000000d7e0000 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=619d781517bf89ac9d430f0c1f0e654a XMM02=2c67c8bc2e329bc3000000000011a3e8 XMM03=fb795ef6d65770560000000000121508 XMM04=75aea39ac2bc37a500000000000ae988 XMM05=5a9d233068761c4a0000000000132ba8 XMM06=a8b7fd95c5afdd850000000000131a10 XMM07=e042d86d42eb936e00000000001217e0 XMM08=964dc7426075f798000000000011a448 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000