syzkaller login: [ 32.651438] BUG: Bad rss-counter state mm:000000004881217b type:MM_FILEPAGES val:33 [ 32.652863] BUG: Bad rss-counter state mm:000000004881217b type:MM_ANONPAGES val:22 [ 32.693076] ================================================================== [ 32.694078] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.695063] Read of size 8 at addr ffff88800d732c20 by task sshd/220 [ 32.695880] [ 32.696110] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.697049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.698090] Call Trace: [ 32.698427] [ 32.698725] dump_stack_lvl+0x91/0xf0 [ 32.699248] print_report+0xcc/0x620 [ 32.699757] ? __virt_addr_valid+0x102/0x340 [ 32.700348] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.701003] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.701650] kasan_report+0xbe/0xf0 [ 32.702153] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.702809] vma_interval_tree_remove+0xc75/0xec0 [ 32.703442] vma_prepare+0xc54/0x11a0 [ 32.703948] __split_vma+0x5af/0x950 [ 32.704464] ? __pfx___split_vma+0x10/0x10 [ 32.705021] ? find_held_lock+0x2c/0x110 [ 32.705572] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.706170] ? lock_is_held_type+0x9f/0x120 [ 32.706745] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.707383] ? mtree_range_walk+0x632/0x900 [ 32.707969] ? mas_walk+0x5c7/0x7c0 [ 32.708491] do_vmi_munmap+0x1f1/0x2b0 [ 32.709027] mmap_region+0x1f9/0x2660 [ 32.709557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.710102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.710860] ? __pfx_lock_acquire+0x10/0x10 [ 32.711437] ? __pfx_mmap_region+0x10/0x10 [ 32.712014] ? security_mmap_addr+0x7d/0xa0 [ 32.712596] ? get_unmapped_area+0x1f5/0x3f0 [ 32.713183] do_mmap+0x854/0xf00 [ 32.713665] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.714202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.714815] ksys_mmap_pgoff+0x3af/0x500 [ 32.715367] do_syscall_64+0x3f/0x90 [ 32.715889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.716598] RIP: 0033:0x7f29438fbd82 [ 32.717095] 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 [ 32.719423] RSP: 002b:00007fffaad74c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.720660] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29438fbd82 [ 32.721594] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2942d35000 [ 32.722528] RBP: 00007f2942d35000 R08: 0000000000000009 R09: 0000000000001000 [ 32.723456] R10: 0000000000000812 R11: 0000000000000206 R12: 000055594c345ec0 [ 32.724388] R13: 00007fffaad74c50 R14: 00007fffaad74c80 R15: 00007fffaad74fe0 [ 32.725316] [ 32.725641] [ 32.725876] Allocated by task 213: [ 32.726344] kasan_save_stack+0x22/0x50 [ 32.726901] kasan_set_track+0x25/0x30 [ 32.727442] __kasan_slab_alloc+0x59/0x70 [ 32.728018] kmem_cache_alloc+0x16b/0x370 [ 32.728613] vm_area_dup+0x20/0x160 [ 32.729107] __split_vma+0x170/0x950 [ 32.729617] split_vma+0xc6/0x110 [ 32.730096] mprotect_fixup+0x8d2/0xb30 [ 32.730649] do_mprotect_pkey+0x87e/0xd40 [ 32.731201] __x64_sys_mprotect+0x78/0xc0 [ 32.731769] do_syscall_64+0x3f/0x90 [ 32.732299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.733007] [ 32.733242] Freed by task 213: [ 32.733678] kasan_save_stack+0x22/0x50 [ 32.734223] kasan_set_track+0x25/0x30 [ 32.734765] kasan_save_free_info+0x2b/0x50 [ 32.735365] __kasan_slab_free+0x10a/0x190 [ 32.735955] kmem_cache_free+0x10d/0x4d0 [ 32.736522] rcu_core+0x8c8/0x2860 [ 32.737008] __do_softirq+0x1b7/0x7d4 [ 32.737537] [ 32.737778] Last potentially related work creation: [ 32.738432] kasan_save_stack+0x22/0x50 [ 32.738985] __kasan_record_aux_stack+0x8e/0xa0 [ 32.739622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.740347] remove_vma+0x139/0x170 [ 32.740845] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.741416] do_vmi_munmap+0x1f1/0x2b0 [ 32.741899] __vm_munmap+0x138/0x3a0 [ 32.742365] __x64_sys_munmap+0x59/0x80 [ 32.742861] do_syscall_64+0x3f/0x90 [ 32.743346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.743984] [ 32.744207] Second to last potentially related work creation: [ 32.744891] kasan_save_stack+0x22/0x50 [ 32.745391] __kasan_record_aux_stack+0x8e/0xa0 [ 32.745967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.746614] remove_vma+0x139/0x170 [ 32.747070] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.747635] do_vmi_munmap+0x1f1/0x2b0 [ 32.748121] mmap_region+0x1f9/0x2660 [ 32.748600] do_mmap+0x854/0xf00 [ 32.749032] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.749529] ksys_mmap_pgoff+0x3af/0x500 [ 32.750046] do_syscall_64+0x3f/0x90 [ 32.750521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.751154] [ 32.751370] The buggy address belongs to the object at ffff88800d732bc8 [ 32.751370] which belongs to the cache vm_area_struct of size 168 [ 32.752867] The buggy address is located 88 bytes inside of [ 32.752867] freed 168-byte region [ffff88800d732bc8, ffff88800d732c70) [ 32.754283] [ 32.754506] The buggy address belongs to the physical page: [ 32.755166] page:000000007c0a3b51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd732 [ 32.756254] memcg:ffff88800e104c01 [ 32.756687] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.757335] page_type: 0xffffffff() [ 32.757789] raw: 0100000000000200 ffff88800879fc80 ffffea000038ec40 dead000000000008 [ 32.758707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e104c01 [ 32.759620] page dumped because: kasan: bad access detected [ 32.760304] [ 32.760527] Memory state around the buggy address: [ 32.761103] ffff88800d732b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.761954] ffff88800d732b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.762811] >ffff88800d732c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.763673] ^ [ 32.764205] ffff88800d732c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.765051] ffff88800d732d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.765900] ================================================================== [ 32.767240] Disabling lock debugging due to kernel taint [ 34.553914] BUG: Bad rss-counter state mm:00000000069c4235 type:MM_FILEPAGES val:33 [ 34.554947] BUG: Bad rss-counter state mm:00000000069c4235 type:MM_ANONPAGES val:22 [ 35.084644] BUG: Bad rss-counter state mm:000000006c2587c3 type:MM_FILEPAGES val:33 [ 35.085856] BUG: Bad rss-counter state mm:000000006c2587c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20874' (ECDSA) to the list of known hosts. 2023/06/20 05:33:48 fuzzer started 2023/06/20 05:33:48 dialing manager at localhost:44161 2023/06/20 05:33:48 checking machine... 2023/06/20 05:33:48 checking revisions... [ 35.759563] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:33:48 testing simple program... [ 35.804557] cgroup: Unknown subsys name 'net' [ 35.856736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:33:46 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff81c66a70 RDX=ffff888015ab0000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801beb74d0 RSP=ffff88800e537898 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801beb74d0 R13=ffff888015e249f8 R14=ffff8880100f8000 R15=ffff8880088b8a38 RIP=ffffffff814c07eb 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 00007f4856ab8700 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=00007ffcf41ef828 CR3=0000000018396000 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=2037343a33333a3530203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a33333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffffffffffe8 RBX=0000000000000001 RCX=ffffffff861476e4 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff861476e6 RBP=ffff8880146f7930 RSP=ffff8880146f7868 R8 =0000000000000001 R9 =ffff8880146f7918 R10=0000000000038001 R11=0000000000023884 R12=ffff8880146f7938 R13=ffff8880146f7920 R14=ffff8880146f7dd0 R15=ffff8880146f78d8 RIP=ffffffff8113120f 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 00007f92cb918900 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=00007f92cad82f70 CR3=000000000d71e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=62418db40fd61d8100000000000ae988 XMM05=a0e1c02e11cada5500000000001364a0 XMM06=4fda316b135da52b0000000000135290 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000