syzkaller login: [ 31.101465] BUG: Bad rss-counter state mm:000000005180ca75 type:MM_FILEPAGES val:33 [ 31.102491] BUG: Bad rss-counter state mm:000000005180ca75 type:MM_ANONPAGES val:22 [ 31.275194] ================================================================== [ 31.276280] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.277415] Read of size 8 at addr ffff8880097e2798 by task sshd/220 [ 31.278470] [ 31.278792] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.280198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.281483] Call Trace: [ 31.281894] [ 31.282196] dump_stack_lvl+0x91/0xf0 [ 31.282699] print_report+0xcc/0x620 [ 31.283199] ? __virt_addr_valid+0x102/0x340 [ 31.283762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.284399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285118] kasan_report+0xbe/0xf0 [ 31.285647] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286281] vma_interval_tree_remove+0xc75/0xec0 [ 31.286890] vma_prepare+0xc54/0x11a0 [ 31.287376] __split_vma+0x5af/0x950 [ 31.287856] ? __pfx___split_vma+0x10/0x10 [ 31.288388] ? find_held_lock+0x2c/0x110 [ 31.288917] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.289525] ? lock_is_held_type+0x9f/0x120 [ 31.290064] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.290686] ? mtree_range_walk+0x632/0x900 [ 31.291251] ? mas_walk+0x5c7/0x7c0 [ 31.291735] do_vmi_munmap+0x1f1/0x2b0 [ 31.292229] mmap_region+0x1f9/0x2660 [ 31.292723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.293236] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.293969] ? __pfx_lock_acquire+0x10/0x10 [ 31.294506] ? __pfx_mmap_region+0x10/0x10 [ 31.295040] ? security_mmap_addr+0x7d/0xa0 [ 31.295579] ? get_unmapped_area+0x1f5/0x3f0 [ 31.296140] do_mmap+0x854/0xf00 [ 31.296588] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.297100] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.297678] ksys_mmap_pgoff+0x3af/0x500 [ 31.298194] do_syscall_64+0x3f/0x90 [ 31.298670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299330] RIP: 0033:0x7f1f7f09ad82 [ 31.299798] 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 [ 31.302016] RSP: 002b:00007ffc8b68d148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.302992] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f7f09ad82 [ 31.303882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f7e4d4000 [ 31.304762] RBP: 00007f1f7e4d4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.305664] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f36f614b20 [ 31.306577] R13: 00007ffc8b68d160 R14: 00007ffc8b68d190 R15: 00007ffc8b68d4f0 [ 31.307484] [ 31.307785] [ 31.308017] Allocated by task 213: [ 31.308468] kasan_save_stack+0x22/0x50 [ 31.309037] kasan_set_track+0x25/0x30 [ 31.309602] __kasan_slab_alloc+0x59/0x70 [ 31.310181] kmem_cache_alloc+0x16b/0x370 [ 31.310714] vm_area_dup+0x20/0x160 [ 31.311164] __split_vma+0x170/0x950 [ 31.311627] split_vma+0xc6/0x110 [ 31.312063] mprotect_fixup+0x8d2/0xb30 [ 31.312565] do_mprotect_pkey+0x87e/0xd40 [ 31.313086] __x64_sys_mprotect+0x78/0xc0 [ 31.313613] do_syscall_64+0x3f/0x90 [ 31.314088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314725] [ 31.314941] Freed by task 203: [ 31.315337] kasan_save_stack+0x22/0x50 [ 31.315835] kasan_set_track+0x25/0x30 [ 31.316324] kasan_save_free_info+0x2b/0x50 [ 31.316860] __kasan_slab_free+0x10a/0x190 [ 31.317394] kmem_cache_free+0x10d/0x4d0 [ 31.317927] rcu_core+0x8c8/0x2860 [ 31.318455] __do_softirq+0x1b7/0x7d4 [ 31.318939] [ 31.319154] Last potentially related work creation: [ 31.319750] kasan_save_stack+0x22/0x50 [ 31.320257] __kasan_record_aux_stack+0x8e/0xa0 [ 31.320848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.321516] remove_vma+0x139/0x170 [ 31.321975] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.322540] do_vmi_munmap+0x1f1/0x2b0 [ 31.323042] __vm_munmap+0x138/0x3a0 [ 31.323520] __x64_sys_munmap+0x59/0x80 [ 31.324027] do_syscall_64+0x3f/0x90 [ 31.324519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.325170] [ 31.325398] Second to last potentially related work creation: [ 31.326093] kasan_save_stack+0x22/0x50 [ 31.326600] __kasan_record_aux_stack+0x8e/0xa0 [ 31.327189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.327847] remove_vma+0x139/0x170 [ 31.328305] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.328869] do_vmi_munmap+0x1f1/0x2b0 [ 31.329382] mmap_region+0x1f9/0x2660 [ 31.329865] do_mmap+0x854/0xf00 [ 31.330300] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.330789] ksys_mmap_pgoff+0x7d/0x500 [ 31.331282] do_syscall_64+0x3f/0x90 [ 31.331766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332414] [ 31.332631] The buggy address belongs to the object at ffff8880097e2740 [ 31.332631] which belongs to the cache vm_area_struct of size 168 [ 31.334140] The buggy address is located 88 bytes inside of [ 31.334140] freed 168-byte region [ffff8880097e2740, ffff8880097e27e8) [ 31.335555] [ 31.335774] The buggy address belongs to the physical page: [ 31.336439] page:00000000640a2a27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97e2 [ 31.337549] memcg:ffff88800d787201 [ 31.337986] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.338645] page_type: 0xffffffff() [ 31.339103] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b17c0 dead00000000000a [ 31.340028] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d787201 [ 31.340969] page dumped because: kasan: bad access detected [ 31.341645] [ 31.341867] Memory state around the buggy address: [ 31.342450] ffff8880097e2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.343312] ffff8880097e2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.344172] >ffff8880097e2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.345033] ^ [ 31.345550] ffff8880097e2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.346409] ffff8880097e2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.347265] ================================================================== [ 31.348211] Disabling lock debugging due to kernel taint [ 33.537516] BUG: Bad rss-counter state mm:000000006b7db826 type:MM_FILEPAGES val:33 [ 33.538932] BUG: Bad rss-counter state mm:000000006b7db826 type:MM_ANONPAGES val:22 [ 34.116954] BUG: Bad rss-counter state mm:000000006125925e type:MM_FILEPAGES val:33 [ 34.118211] BUG: Bad rss-counter state mm:000000006125925e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18474' (ECDSA) to the list of known hosts. 2023/06/20 14:52:17 fuzzer started 2023/06/20 14:52:18 dialing manager at localhost:36067 2023/06/20 14:52:18 checking machine... 2023/06/20 14:52:18 checking revisions... [ 34.777156] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:52:18 testing simple program... [ 34.831502] cgroup: Unknown subsys name 'net' [ 34.891177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:52:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc6eadefe8 CR3=0000000013ea8000 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=2037313a32353a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a32353a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801973c6e8 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888008922f40 RBP=ffff888008922f40 RSP=ffff8880147f7708 R8 =0000000000000000 R9 =ffffed10011245e8 R10=ffff888008922f43 R11=3830306234386136 R12=ffff888008922fc8 R13=ffff888008922f40 R14=ffff888008922eb0 R15=ffffffff87f348b8 RIP=ffffffff84535f15 RFL=00000286 [--S--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 00007f46ece65900 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=00007f6575219650 CR3=0000000009070000 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=35cbe8b146da513200000000000ae988 XMM05=b9de4db8f66949030000000000134dd0 XMM06=4fda316b135da52b0000000000133bc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000