syzkaller login: [ 40.374427] BUG: Bad rss-counter state mm:00000000d8b2cd63 type:MM_FILEPAGES val:33 [ 40.375959] BUG: Bad rss-counter state mm:00000000d8b2cd63 type:MM_ANONPAGES val:22 [ 40.542834] ================================================================== [ 40.543742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.544689] Read of size 8 at addr ffff888016b6f058 by task sshd/219 [ 40.545560] [ 40.545798] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.546670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.547649] Call Trace: [ 40.547976] [ 40.548258] dump_stack_lvl+0x91/0xf0 [ 40.548758] print_report+0xcc/0x620 [ 40.549243] ? __virt_addr_valid+0x102/0x340 [ 40.549801] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.550418] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.551045] kasan_report+0xbe/0xf0 [ 40.551534] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.552162] vma_interval_tree_remove+0xc75/0xec0 [ 40.552766] vma_prepare+0xc54/0x11a0 [ 40.553249] __split_vma+0x5af/0x950 [ 40.553745] ? __pfx___split_vma+0x10/0x10 [ 40.554278] ? find_held_lock+0x2c/0x110 [ 40.554799] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.555364] ? lock_is_held_type+0x9f/0x120 [ 40.555897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.556508] ? mtree_range_walk+0x632/0x900 [ 40.557062] ? mas_walk+0x5c7/0x7c0 [ 40.557540] do_vmi_munmap+0x1f1/0x2b0 [ 40.558042] mmap_region+0x1f9/0x2660 [ 40.558529] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.559042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.559754] ? __pfx_lock_acquire+0x10/0x10 [ 40.560292] ? __pfx_mmap_region+0x10/0x10 [ 40.560818] ? security_mmap_addr+0x7d/0xa0 [ 40.561347] ? get_unmapped_area+0x1f5/0x3f0 [ 40.561928] do_mmap+0x854/0xf00 [ 40.562369] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.562869] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.563492] ksys_mmap_pgoff+0x3af/0x500 [ 40.564019] do_syscall_64+0x3f/0x90 [ 40.564501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.565151] RIP: 0033:0x7f074a967d82 [ 40.565618] 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 [ 40.567727] RSP: 002b:00007ffcbd4289f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.568641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f074a967d82 [ 40.569481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0749da1000 [ 40.570336] RBP: 00007f0749da1000 R08: 0000000000000009 R09: 0000000000001000 [ 40.571183] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3baedfd90 [ 40.572025] R13: 00007ffcbd428a10 R14: 00007ffcbd428a40 R15: 00007ffcbd428da0 [ 40.572881] [ 40.573186] [ 40.573404] Allocated by task 212: [ 40.573843] kasan_save_stack+0x22/0x50 [ 40.574344] kasan_set_track+0x25/0x30 [ 40.574841] __kasan_slab_alloc+0x59/0x70 [ 40.575364] kmem_cache_alloc+0x16b/0x370 [ 40.575879] vm_area_dup+0x20/0x160 [ 40.576334] __split_vma+0x170/0x950 [ 40.576803] split_vma+0xc6/0x110 [ 40.577241] mprotect_fixup+0x8d2/0xb30 [ 40.577749] do_mprotect_pkey+0x87e/0xd40 [ 40.578269] __x64_sys_mprotect+0x78/0xc0 [ 40.578788] do_syscall_64+0x3f/0x90 [ 40.579264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.579905] [ 40.580118] Freed by task 212: [ 40.580509] kasan_save_stack+0x22/0x50 [ 40.581013] kasan_set_track+0x25/0x30 [ 40.581503] kasan_save_free_info+0x2b/0x50 [ 40.582045] __kasan_slab_free+0x10a/0x190 [ 40.582575] kmem_cache_free+0x10d/0x4d0 [ 40.583079] rcu_core+0x8c8/0x2860 [ 40.583517] __do_softirq+0x1b7/0x7d4 [ 40.583995] [ 40.584219] Last potentially related work creation: [ 40.584800] kasan_save_stack+0x22/0x50 [ 40.585305] __kasan_record_aux_stack+0x8e/0xa0 [ 40.585921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.586578] remove_vma+0x139/0x170 [ 40.587036] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.587607] do_vmi_munmap+0x1f1/0x2b0 [ 40.588105] __vm_munmap+0x138/0x3a0 [ 40.588580] __x64_sys_munmap+0x59/0x80 [ 40.589090] do_syscall_64+0x3f/0x90 [ 40.589588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.590243] [ 40.590461] The buggy address belongs to the object at ffff888016b6f000 [ 40.590461] which belongs to the cache vm_area_struct of size 168 [ 40.591972] The buggy address is located 88 bytes inside of [ 40.591972] freed 168-byte region [ffff888016b6f000, ffff888016b6f0a8) [ 40.593395] [ 40.593621] The buggy address belongs to the physical page: [ 40.594278] page:00000000d51e6e53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b6f [ 40.595367] memcg:ffff88800974b501 [ 40.595789] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.596433] page_type: 0xffffffff() [ 40.596888] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.597814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800974b501 [ 40.598728] page dumped because: kasan: bad access detected [ 40.599399] [ 40.599617] Memory state around the buggy address: [ 40.600194] ffff888016b6ef00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 40.601060] ffff888016b6ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.601930] >ffff888016b6f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.602781] ^ [ 40.603507] ffff888016b6f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 40.604363] ffff888016b6f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.605218] ================================================================== [ 40.606254] Disabling lock debugging due to kernel taint [ 42.962729] BUG: Bad rss-counter state mm:00000000b9c0415b type:MM_FILEPAGES val:33 [ 42.964066] BUG: Bad rss-counter state mm:00000000b9c0415b type:MM_ANONPAGES val:22 [ 43.477339] BUG: Bad rss-counter state mm:00000000eedec212 type:MM_FILEPAGES val:33 [ 43.478522] BUG: Bad rss-counter state mm:00000000eedec212 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49125' (ECDSA) to the list of known hosts. 2023/06/19 18:10:16 fuzzer started 2023/06/19 18:10:16 dialing manager at localhost:44161 2023/06/19 18:10:16 checking machine... 2023/06/19 18:10:16 checking revisions... [ 44.042835] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:10:16 testing simple program... [ 44.101669] cgroup: Unknown subsys name 'net' [ 44.146981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:10:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fd73bd15000 CR3=000000000c95c000 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=a2c17a222d3754bc0c4068f90e17d5d1 XMM02=2c67c8bc2e329bc3000000000011d6a0 XMM03=fb795ef6d65770560000000000124040 XMM04=6bdbc4bbb23e740200000000000ae988 XMM05=a4c57c0a65addb400000000000134ad8 XMM06=806171799158d9670000000000133808 XMM07=e042d86d42eb936e00000000001242c0 XMM08=aeb3e6f1d9ab3c58000000000011d700 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffff88800eae8780 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800eae8784 RBP=ffff88800eae8780 RSP=ffff88800dcc7bd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=ffff88800e41dd98 R14=00007ff117f8a000 R15=800000001b60c067 RIP=ffffffff812e03fd RFL=00000202 [-------] 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 00007ff117436900 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=00007ff117f8a044 CR3=000000000c5fc000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=f83019c05888413a7ccf5ad578007534 XMM05=00000000000000000000000000ff00ff XMM06=c83019c0584e1e3a7c575a6378004300 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000