[ 30.589160] BUG: Bad rss-counter state mm:00000000fc318bef type:MM_FILEPAGES val:33 [ 30.589832] BUG: Bad rss-counter state mm:00000000fc318bef type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.753213] ================================================================== [ 30.753825] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.755221] Read of size 8 at addr ffff888009769968 by task sshd/220 [ 30.755719] [ 30.755866] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.756428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.757055] Call Trace: [ 30.757266] [ 30.757457] dump_stack_lvl+0x91/0xf0 [ 30.757786] print_report+0xcc/0x620 [ 30.758411] ? __virt_addr_valid+0x102/0x340 [ 30.758776] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.759233] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.759637] kasan_report+0xbe/0xf0 [ 30.760005] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760412] vma_interval_tree_remove+0xc75/0xec0 [ 30.760806] vma_prepare+0xc54/0x11a0 [ 30.761170] __split_vma+0x5af/0x950 [ 30.761477] ? __pfx___split_vma+0x10/0x10 [ 30.761815] ? find_held_lock+0x2c/0x110 [ 30.762347] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.762710] ? lock_is_held_type+0x9f/0x120 [ 30.763127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.763518] ? mtree_range_walk+0x632/0x900 [ 30.763926] ? mas_walk+0x5c7/0x7c0 [ 30.764237] do_vmi_munmap+0x1f1/0x2b0 [ 30.764557] mmap_region+0x1f9/0x2660 [ 30.764924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.765260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.765721] ? __pfx_lock_acquire+0x10/0x10 [ 30.766307] ? __pfx_mmap_region+0x10/0x10 [ 30.766651] ? security_mmap_addr+0x7d/0xa0 [ 30.767043] ? get_unmapped_area+0x1f5/0x3f0 [ 30.767395] do_mmap+0x854/0xf00 [ 30.767686] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.768064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.768435] ksys_mmap_pgoff+0x3af/0x500 [ 30.768772] do_syscall_64+0x3f/0x90 [ 30.769142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769578] RIP: 0033:0x7f15f9f19d82 [ 30.770049] 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 [ 30.771472] RSP: 002b:00007ffc1516d688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.772108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15f9f19d82 [ 30.772656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15f9353000 [ 30.773253] RBP: 00007f15f9353000 R08: 0000000000000009 R09: 0000000000001000 [ 30.773802] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f7ec74ec0 [ 30.774537] R13: 00007ffc1516d6a0 R14: 00007ffc1516d6d0 R15: 00007ffc1516da30 [ 30.775145] [ 30.775342] [ 30.775483] Allocated by task 213: [ 30.775764] kasan_save_stack+0x22/0x50 [ 30.776149] kasan_set_track+0x25/0x30 [ 30.776475] __kasan_slab_alloc+0x59/0x70 [ 30.776816] kmem_cache_alloc+0x16b/0x370 [ 30.777206] vm_area_dup+0x20/0x160 [ 30.777508] __split_vma+0x170/0x950 [ 30.777817] split_vma+0xc6/0x110 [ 30.778223] mprotect_fixup+0x8d2/0xb30 [ 30.778555] do_mprotect_pkey+0x87e/0xd40 [ 30.778963] __x64_sys_mprotect+0x78/0xc0 [ 30.779318] do_syscall_64+0x3f/0x90 [ 30.779637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780130] [ 30.780294] Freed by task 13: [ 30.780558] kasan_save_stack+0x22/0x50 [ 30.780940] kasan_set_track+0x25/0x30 [ 30.781272] kasan_save_free_info+0x2b/0x50 [ 30.781671] __kasan_slab_free+0x10a/0x190 [ 30.782118] kmem_cache_free+0x10d/0x4d0 [ 30.782465] rcu_core+0x8c8/0x2860 [ 30.782759] __do_softirq+0x1b7/0x7d4 [ 30.783140] [ 30.783281] Last potentially related work creation: [ 30.783658] kasan_save_stack+0x22/0x50 [ 30.784054] __kasan_record_aux_stack+0x8e/0xa0 [ 30.784432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.784905] remove_vma+0x139/0x170 [ 30.785217] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.785581] do_vmi_munmap+0x1f1/0x2b0 [ 30.785991] __vm_munmap+0x138/0x3a0 [ 30.786306] __x64_sys_munmap+0x59/0x80 [ 30.786634] do_syscall_64+0x3f/0x90 [ 30.787005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787437] [ 30.787580] Second to last potentially related work creation: [ 30.788090] kasan_save_stack+0x22/0x50 [ 30.788422] __kasan_record_aux_stack+0x8e/0xa0 [ 30.788800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.789286] remove_vma+0x139/0x170 [ 30.789586] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.790046] do_vmi_munmap+0x1f1/0x2b0 [ 30.790373] mmap_region+0x1f9/0x2660 [ 30.790687] do_mmap+0x854/0xf00 [ 30.791036] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.791362] ksys_mmap_pgoff+0x3af/0x500 [ 30.791692] do_syscall_64+0x3f/0x90 [ 30.792072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.792493] [ 30.792630] The buggy address belongs to the object at ffff888009769910 [ 30.792630] which belongs to the cache vm_area_struct of size 168 [ 30.793635] The buggy address is located 88 bytes inside of [ 30.793635] freed 168-byte region [ffff888009769910, ffff8880097699b8) [ 30.794643] [ 30.794788] The buggy address belongs to the physical page: [ 30.796452] page:000000006da87ded refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9769 [ 30.797236] memcg:ffff888009a5cb01 [ 30.797518] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.798102] page_type: 0xffffffff() [ 30.798408] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c4280 dead000000000007 [ 30.799155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a5cb01 [ 30.799741] page dumped because: kasan: bad access detected [ 30.800258] [ 30.800398] Memory state around the buggy address: [ 30.800779] ffff888009769800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.801416] ffff888009769880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.802113] >ffff888009769900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.808351] ^ [ 30.809971] ffff888009769980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.810524] ffff888009769a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.812119] ================================================================== [ 30.822059] Disabling lock debugging due to kernel taint [ 34.396605] BUG: Bad rss-counter state mm:00000000a5e18fba type:MM_FILEPAGES val:33 [ 34.397317] BUG: Bad rss-counter state mm:00000000a5e18fba type:MM_ANONPAGES val:22 [ 35.259545] BUG: Bad rss-counter state mm:00000000a49e71e1 type:MM_FILEPAGES val:33 [ 35.260349] BUG: Bad rss-counter state mm:00000000a49e71e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62243' (ECDSA) to the list of known hosts. 2023/06/21 08:04:36 fuzzer started 2023/06/21 08:04:36 dialing manager at localhost:36067 2023/06/21 08:04:36 checking machine... 2023/06/21 08:04:36 checking revisions... [ 36.148284] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:04:36 testing simple program... [ 36.189142] cgroup: Unknown subsys name 'net' [ 36.294245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:04:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800b664128 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800b664198 RBP=ffff88801952fc48 RSP=ffff88801952f938 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=1ffff110032a5f29 R13=dffffc0000000000 R14=ffff88800b664128 R15=ffff88801952fc58 RIP=ffffffff8452a642 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 00007fe485af2900 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=000056063ead917d CR3=000000001a38a000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 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=00007f49e88e62b0 CR3=000000000c98a000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=26a624e2b4f79e130000000000133dd8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=ed9f037b32b3909100000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000