[ 30.138413] BUG: Bad rss-counter state mm:00000000c5ccec31 type:MM_FILEPAGES val:33 [ 30.139584] BUG: Bad rss-counter state mm:00000000c5ccec31 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.306902] ================================================================== [ 30.308022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.309115] Read of size 8 at addr ffff88800dfdcb38 by task sshd/218 [ 30.310212] [ 30.310474] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.311329] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.312345] Call Trace: [ 30.312663] [ 30.312945] dump_stack_lvl+0x91/0xf0 [ 30.313437] print_report+0xcc/0x620 [ 30.313922] ? __virt_addr_valid+0x102/0x340 [ 30.314465] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.315085] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.315699] kasan_report+0xbe/0xf0 [ 30.316202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316820] vma_interval_tree_remove+0xc75/0xec0 [ 30.317422] vma_prepare+0xc54/0x11a0 [ 30.317901] __split_vma+0x5af/0x950 [ 30.318371] ? __pfx___split_vma+0x10/0x10 [ 30.318902] ? find_held_lock+0x2c/0x110 [ 30.319418] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.320016] ? lock_is_held_type+0x9f/0x120 [ 30.320553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.321155] ? mtree_range_walk+0x632/0x900 [ 30.321715] ? mas_walk+0x5c7/0x7c0 [ 30.322191] do_vmi_munmap+0x1f1/0x2b0 [ 30.322687] mmap_region+0x1f9/0x2660 [ 30.323173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.323684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.324425] ? __pfx_lock_acquire+0x10/0x10 [ 30.324958] ? __pfx_mmap_region+0x10/0x10 [ 30.325490] ? security_mmap_addr+0x7d/0xa0 [ 30.326027] ? get_unmapped_area+0x1f5/0x3f0 [ 30.326571] do_mmap+0x854/0xf00 [ 30.327005] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.327499] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.328102] ksys_mmap_pgoff+0x3af/0x500 [ 30.328611] do_syscall_64+0x3f/0x90 [ 30.329092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.329737] RIP: 0033:0x7f2e33ce7d82 [ 30.330193] 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 [ 30.332346] RSP: 002b:00007ffc7dac6b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.333254] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e33ce7d82 [ 30.334135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e33121000 [ 30.334998] RBP: 00007f2e33121000 R08: 0000000000000009 R09: 0000000000001000 [ 30.335889] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b4653dec0 [ 30.336751] R13: 00007ffc7dac6b90 R14: 00007ffc7dac6bc0 R15: 00007ffc7dac6f20 [ 30.337618] [ 30.337916] [ 30.338142] Allocated by task 211: [ 30.338580] kasan_save_stack+0x22/0x50 [ 30.339082] kasan_set_track+0x25/0x30 [ 30.339585] __kasan_slab_alloc+0x59/0x70 [ 30.340158] kmem_cache_alloc+0x16b/0x370 [ 30.340684] vm_area_dup+0x20/0x160 [ 30.341151] __split_vma+0x170/0x950 [ 30.341616] split_vma+0xc6/0x110 [ 30.342060] mprotect_fixup+0x8d2/0xb30 [ 30.342574] do_mprotect_pkey+0x87e/0xd40 [ 30.343098] __x64_sys_mprotect+0x78/0xc0 [ 30.343627] do_syscall_64+0x3f/0x90 [ 30.344128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.344767] [ 30.344984] Freed by task 211: [ 30.345374] kasan_save_stack+0x22/0x50 [ 30.345878] kasan_set_track+0x25/0x30 [ 30.346370] kasan_save_free_info+0x2b/0x50 [ 30.346910] __kasan_slab_free+0x10a/0x190 [ 30.347443] kmem_cache_free+0x10d/0x4d0 [ 30.347980] rcu_core+0x8c8/0x2860 [ 30.348425] __do_softirq+0x1b7/0x7d4 [ 30.348914] [ 30.349131] Last potentially related work creation: [ 30.349719] kasan_save_stack+0x22/0x50 [ 30.350242] __kasan_record_aux_stack+0x8e/0xa0 [ 30.350886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.351534] remove_vma+0x139/0x170 [ 30.352010] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.352566] do_vmi_munmap+0x1f1/0x2b0 [ 30.353054] __vm_munmap+0x138/0x3a0 [ 30.353518] __x64_sys_munmap+0x59/0x80 [ 30.354026] do_syscall_64+0x3f/0x90 [ 30.354503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.355151] [ 30.355369] The buggy address belongs to the object at ffff88800dfdcae0 [ 30.355369] which belongs to the cache vm_area_struct of size 168 [ 30.356883] The buggy address is located 88 bytes inside of [ 30.356883] freed 168-byte region [ffff88800dfdcae0, ffff88800dfdcb88) [ 30.358311] [ 30.358528] The buggy address belongs to the physical page: [ 30.359186] page:0000000066baa0ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfdc [ 30.360312] memcg:ffff88800f22e101 [ 30.360736] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.361379] page_type: 0xffffffff() [ 30.361828] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.362742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f22e101 [ 30.363651] page dumped because: kasan: bad access detected [ 30.364345] [ 30.364568] Memory state around the buggy address: [ 30.365146] ffff88800dfdca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.366005] ffff88800dfdca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.366857] >ffff88800dfdcb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.367701] ^ [ 30.368331] ffff88800dfdcb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.369192] ffff88800dfdcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.370042] ================================================================== [ 30.371049] Disabling lock debugging due to kernel taint [ 32.814792] BUG: Bad rss-counter state mm:0000000077dc450e type:MM_FILEPAGES val:33 [ 32.815992] BUG: Bad rss-counter state mm:0000000077dc450e type:MM_ANONPAGES val:22 [ 33.247079] BUG: Bad rss-counter state mm:000000000562f074 type:MM_FILEPAGES val:33 [ 33.248097] BUG: Bad rss-counter state mm:000000000562f074 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52887' (ECDSA) to the list of known hosts. 2023/06/21 03:12:44 fuzzer started 2023/06/21 03:12:45 dialing manager at localhost:36067 2023/06/21 03:12:45 checking machine... 2023/06/21 03:12:45 checking revisions... [ 33.937349] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:12:45 testing simple program... [ 33.970211] cgroup: Unknown subsys name 'net' [ 34.000802] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:12:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800950f0d8 RCX=ffffffff844f7f28 RDX=ffff888009500000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88800950f008 R8 =0000000000000007 R9 =000000000000003f R10=0000000000000000 R11=0000000000009293 R12=ffff88801b062ec2 R13=ffff88800950f0f0 R14=0000000000000002 R15=0000000000000001 RIP=ffffffff814c027c RFL=00000046 [---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 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=00007ffd773c0d38 CR3=0000000005482000 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=00007f4f82f225100000555d8e1f2790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=ffff88801478f8b0 RSI=0000000000000000 RDI=ffff88801478f558 RBP=ffff88801478f5e0 RSP=ffff88801478f548 R8 =ffffffff86138eb4 R9 =ffff88801478f588 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801478f610 R13=0000000000000000 R14=ffff888014790000 R15=ffff888016a2da00 RIP=ffffffff810bd05d RFL=00000292 [--S-A--] 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 00007fc1f1d22900 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=00007fec358df650 CR3=000000000f664000 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=168fbec620fcd39ed34f53bd3205ea82 XMM02=eff9b2d0a8fce9cb000000000011d5f0 XMM03=2c67c8bc2e329bc3000000000011d718 XMM04=c193b15109f0375500000000000ae988 XMM05=47fc6d88955483bf00000000001339e8 XMM06=bdf2e299e47b49d50000000000132468 XMM07=fb795ef6d65770560000000000122a70 XMM08=2c67c8bc2e329bc3000000000011d718 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000