syzkaller login: [ 30.379074] BUG: Bad rss-counter state mm:0000000023f98f63 type:MM_FILEPAGES val:33 [ 30.380291] BUG: Bad rss-counter state mm:0000000023f98f63 type:MM_ANONPAGES val:22 [ 30.523859] ================================================================== [ 30.524830] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.525812] Read of size 8 at addr ffff8880165e35c8 by task sshd/221 [ 30.526622] [ 30.527018] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.527938] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.528973] Call Trace: [ 30.529362] [ 30.529669] dump_stack_lvl+0x91/0xf0 [ 30.530179] print_report+0xcc/0x620 [ 30.530719] ? __virt_addr_valid+0x102/0x340 [ 30.531294] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.531962] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.532621] kasan_report+0xbe/0xf0 [ 30.533129] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.533791] vma_interval_tree_remove+0xc75/0xec0 [ 30.534416] vma_prepare+0xc54/0x11a0 [ 30.534937] __split_vma+0x5af/0x950 [ 30.535427] ? __pfx___split_vma+0x10/0x10 [ 30.536003] ? find_held_lock+0x2c/0x110 [ 30.536551] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.537136] ? lock_is_held_type+0x9f/0x120 [ 30.537716] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.538349] ? mtree_range_walk+0x632/0x900 [ 30.538958] ? mas_walk+0x5c7/0x7c0 [ 30.539456] do_vmi_munmap+0x1f1/0x2b0 [ 30.539989] mmap_region+0x1f9/0x2660 [ 30.540490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.541041] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.541799] ? __pfx_lock_acquire+0x10/0x10 [ 30.542347] ? __pfx_mmap_region+0x10/0x10 [ 30.542931] ? security_mmap_addr+0x7d/0xa0 [ 30.543478] ? get_unmapped_area+0x1f5/0x3f0 [ 30.544070] do_mmap+0x854/0xf00 [ 30.544543] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.545061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.545672] ksys_mmap_pgoff+0x3af/0x500 [ 30.546203] do_syscall_64+0x3f/0x90 [ 30.546724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.547402] RIP: 0033:0x7f309c71fd82 [ 30.547898] 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 [ 30.550175] RSP: 002b:00007ffc79262c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.551162] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f309c71fd82 [ 30.552073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f309bb59000 [ 30.552987] RBP: 00007f309bb59000 R08: 0000000000000009 R09: 0000000000001000 [ 30.553892] R10: 0000000000000812 R11: 0000000000000206 R12: 000055804f298ec0 [ 30.554811] R13: 00007ffc79262cb0 R14: 00007ffc79262ce0 R15: 00007ffc79263040 [ 30.555725] [ 30.556023] [ 30.556243] Allocated by task 214: [ 30.556702] kasan_save_stack+0x22/0x50 [ 30.557230] kasan_set_track+0x25/0x30 [ 30.557773] __kasan_slab_alloc+0x59/0x70 [ 30.558317] kmem_cache_alloc+0x16b/0x370 [ 30.558881] vm_area_dup+0x20/0x160 [ 30.559358] __split_vma+0x170/0x950 [ 30.559855] split_vma+0xc6/0x110 [ 30.560308] mprotect_fixup+0x8d2/0xb30 [ 30.560849] do_mprotect_pkey+0x87e/0xd40 [ 30.561385] __x64_sys_mprotect+0x78/0xc0 [ 30.561963] do_syscall_64+0x3f/0x90 [ 30.562459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.563168] [ 30.563389] Freed by task 13: [ 30.563801] kasan_save_stack+0x22/0x50 [ 30.564324] kasan_set_track+0x25/0x30 [ 30.564853] kasan_save_free_info+0x2b/0x50 [ 30.565407] __kasan_slab_free+0x10a/0x190 [ 30.565991] kmem_cache_free+0x10d/0x4d0 [ 30.566532] rcu_core+0x8c8/0x2860 [ 30.567023] __do_softirq+0x1b7/0x7d4 [ 30.567542] [ 30.567768] Last potentially related work creation: [ 30.568458] kasan_save_stack+0x22/0x50 [ 30.568990] __kasan_record_aux_stack+0x8e/0xa0 [ 30.569600] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.570273] remove_vma+0x139/0x170 [ 30.570777] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.571357] do_vmi_munmap+0x1f1/0x2b0 [ 30.571882] __vm_munmap+0x138/0x3a0 [ 30.572370] __x64_sys_munmap+0x59/0x80 [ 30.572892] do_syscall_64+0x3f/0x90 [ 30.573382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.574074] [ 30.574298] The buggy address belongs to the object at ffff8880165e3570 [ 30.574298] which belongs to the cache vm_area_struct of size 168 [ 30.575871] The buggy address is located 88 bytes inside of [ 30.575871] freed 168-byte region [ffff8880165e3570, ffff8880165e3618) [ 30.577369] [ 30.577604] The buggy address belongs to the physical page: [ 30.578291] page:00000000c2a6e1a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165e3 [ 30.579471] memcg:ffff888010153201 [ 30.579927] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.580605] page_type: 0xffffffff() [ 30.581083] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.582061] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010153201 [ 30.583052] page dumped because: kasan: bad access detected [ 30.583762] [ 30.583989] Memory state around the buggy address: [ 30.584615] ffff8880165e3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.585518] ffff8880165e3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.586409] >ffff8880165e3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.587348] ^ [ 30.588064] ffff8880165e3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.588963] ffff8880165e3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.589874] ================================================================== [ 30.590982] Disabling lock debugging due to kernel taint [ 32.639073] BUG: Bad rss-counter state mm:0000000090523bc1 type:MM_FILEPAGES val:33 [ 32.640130] BUG: Bad rss-counter state mm:0000000090523bc1 type:MM_ANONPAGES val:22 [ 33.173354] BUG: Bad rss-counter state mm:000000003e6dbd4a type:MM_FILEPAGES val:33 [ 33.174556] BUG: Bad rss-counter state mm:000000003e6dbd4a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61678' (ECDSA) to the list of known hosts. 2023/06/20 17:06:25 fuzzer started 2023/06/20 17:06:25 dialing manager at localhost:36067 2023/06/20 17:06:25 checking machine... 2023/06/20 17:06:25 checking revisions... [ 33.802788] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:06:25 testing simple program... [ 33.844457] cgroup: Unknown subsys name 'net' [ 33.884866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:06:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00005587d1819780 RCX=00007f7a61b956c3 RDX=0000000000000006 RSI=0000000000000007 RDI=0000000000000008 RBP=0000000000000000 RSP=00007ffc1d6b3240 R8 =00005587d1813630 R9 =00007ffc1d6ac5b8 R10=00005587d1801eb0 R11=0000000000000246 R12=00000000ffffffe3 R13=00005587d10c81c0 R14=00007ffc1d6b35d0 R15=00007ffc1d6b3380 RIP=00005587d1070eaf RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7a616b2900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc1d6ad000 CR3=0000000015a06000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007fdbae3aa7c0 CR3=000000000d554000 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=1b233c91ccab5aa4374163936dd6e2d4 XMM02=ec2efd57dc4c00df000000000011ac58 XMM03=f40bddece5001483000000000011ad28 XMM04=11cd2d44d13fb4cb00000000000ae988 XMM05=668a0a2a06f3d4240000000000132e28 XMM06=c291bd5c70af25b90000000000131ec8 XMM07=e042d86d42eb936e0000000000122488 XMM08=f40bddece5001483000000000011ad28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000