syzkaller login: [ 31.390649] BUG: Bad rss-counter state mm:0000000082a17c34 type:MM_FILEPAGES val:33 [ 31.391669] BUG: Bad rss-counter state mm:0000000082a17c34 type:MM_ANONPAGES val:22 [ 31.538832] ================================================================== [ 31.539736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.540677] Read of size 8 at addr ffff888010348968 by task sshd/221 [ 31.541575] [ 31.541798] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.542682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.543681] Call Trace: [ 31.544002] [ 31.544285] dump_stack_lvl+0x91/0xf0 [ 31.544772] print_report+0xcc/0x620 [ 31.545268] ? __virt_addr_valid+0x102/0x340 [ 31.545834] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.546453] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.547070] kasan_report+0xbe/0xf0 [ 31.547548] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.548176] vma_interval_tree_remove+0xc75/0xec0 [ 31.548776] vma_prepare+0xc54/0x11a0 [ 31.549259] __split_vma+0x5af/0x950 [ 31.549755] ? __pfx___split_vma+0x10/0x10 [ 31.550283] ? find_held_lock+0x2c/0x110 [ 31.550793] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.551354] ? lock_is_held_type+0x9f/0x120 [ 31.551902] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.552518] ? mtree_range_walk+0x632/0x900 [ 31.553067] ? mas_walk+0x5c7/0x7c0 [ 31.553556] do_vmi_munmap+0x1f1/0x2b0 [ 31.554050] mmap_region+0x1f9/0x2660 [ 31.554533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.555043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.555758] ? __pfx_lock_acquire+0x10/0x10 [ 31.556300] ? __pfx_mmap_region+0x10/0x10 [ 31.556832] ? security_mmap_addr+0x7d/0xa0 [ 31.557366] ? get_unmapped_area+0x1f5/0x3f0 [ 31.557932] do_mmap+0x854/0xf00 [ 31.558370] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.558865] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.559428] ksys_mmap_pgoff+0x3af/0x500 [ 31.559933] do_syscall_64+0x3f/0x90 [ 31.560419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.561063] RIP: 0033:0x7fca40949d82 [ 31.561539] 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 [ 31.563639] RSP: 002b:00007ffc31bea378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.564539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca40949d82 [ 31.565384] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca3fd83000 [ 31.566230] RBP: 00007fca3fd83000 R08: 0000000000000009 R09: 0000000000001000 [ 31.567075] R10: 0000000000000812 R11: 0000000000000206 R12: 000056168316db20 [ 31.567917] R13: 00007ffc31bea390 R14: 00007ffc31bea3c0 R15: 00007ffc31bea720 [ 31.568774] [ 31.569069] [ 31.569289] Allocated by task 214: [ 31.569734] kasan_save_stack+0x22/0x50 [ 31.570237] kasan_set_track+0x25/0x30 [ 31.570724] __kasan_slab_alloc+0x59/0x70 [ 31.571247] kmem_cache_alloc+0x16b/0x370 [ 31.571762] vm_area_dup+0x20/0x160 [ 31.572217] __split_vma+0x170/0x950 [ 31.572682] split_vma+0xc6/0x110 [ 31.573116] mprotect_fixup+0x8d2/0xb30 [ 31.573622] do_mprotect_pkey+0x87e/0xd40 [ 31.574142] __x64_sys_mprotect+0x78/0xc0 [ 31.574659] do_syscall_64+0x3f/0x90 [ 31.575133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.575768] [ 31.575989] Freed by task 214: [ 31.576383] kasan_save_stack+0x22/0x50 [ 31.576886] kasan_set_track+0x25/0x30 [ 31.577378] kasan_save_free_info+0x2b/0x50 [ 31.577928] __kasan_slab_free+0x10a/0x190 [ 31.578463] kmem_cache_free+0x10d/0x4d0 [ 31.578972] rcu_core+0x8c8/0x2860 [ 31.579425] __do_softirq+0x1b7/0x7d4 [ 31.579903] [ 31.580118] Last potentially related work creation: [ 31.580713] kasan_save_stack+0x22/0x50 [ 31.581216] __kasan_record_aux_stack+0x8e/0xa0 [ 31.581799] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.582444] remove_vma+0x139/0x170 [ 31.582897] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.583457] do_vmi_munmap+0x1f1/0x2b0 [ 31.583942] __vm_munmap+0x138/0x3a0 [ 31.584403] __x64_sys_munmap+0x59/0x80 [ 31.584893] do_syscall_64+0x3f/0x90 [ 31.585369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586019] [ 31.586236] The buggy address belongs to the object at ffff888010348910 [ 31.586236] which belongs to the cache vm_area_struct of size 168 [ 31.587686] The buggy address is located 88 bytes inside of [ 31.587686] freed 168-byte region [ffff888010348910, ffff8880103489b8) [ 31.589085] [ 31.589302] The buggy address belongs to the physical page: [ 31.589967] page:00000000dbf99bdb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10348 [ 31.591052] memcg:ffff8880094b3501 [ 31.591479] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.592127] page_type: 0xffffffff() [ 31.592574] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.593498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b3501 [ 31.594398] page dumped because: kasan: bad access detected [ 31.595060] [ 31.595281] Memory state around the buggy address: [ 31.595860] ffff888010348800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.596712] ffff888010348880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.597577] >ffff888010348900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.598422] ^ [ 31.599196] ffff888010348980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.600058] ffff888010348a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.600900] ================================================================== [ 31.602115] Disabling lock debugging due to kernel taint [ 33.612257] BUG: Bad rss-counter state mm:00000000b2e3fbcd type:MM_FILEPAGES val:33 [ 33.613230] BUG: Bad rss-counter state mm:00000000b2e3fbcd type:MM_ANONPAGES val:22 [ 34.090397] BUG: Bad rss-counter state mm:000000005d412ac5 type:MM_FILEPAGES val:33 [ 34.091460] BUG: Bad rss-counter state mm:000000005d412ac5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51471' (ECDSA) to the list of known hosts. 2023/06/20 21:42:03 fuzzer started 2023/06/20 21:42:03 dialing manager at localhost:36067 2023/06/20 21:42:03 checking machine... 2023/06/20 21:42:03 checking revisions... [ 34.838097] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:42:04 testing simple program... [ 34.887736] cgroup: Unknown subsys name 'net' [ 35.029461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:42:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800f71a130 RCX=ffff88800f71a130 RDX=00000000000d000d RSI=ffff88800f71a130 RDI=ffff88800844f780 RBP=ffff88800cf077f8 RSP=ffff88800cf07760 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea00003dc680 R11=00000000800c000a R12=ffffea00003dc680 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff81809672 RFL=00000246 [---Z-P-] 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 00007fd59c975900 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=00007fd59cf2a650 CR3=000000000fd7e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffd2eb19868 CR3=0000000015b3e000 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=2033303a32343a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32343a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000