[ 31.165239] BUG: Bad rss-counter state mm:0000000044904df0 type:MM_FILEPAGES val:33 [ 31.166429] BUG: Bad rss-counter state mm:0000000044904df0 type:MM_ANONPAGES val:22 [ 31.205614] ================================================================== [ 31.206705] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.207702] Read of size 8 at addr ffff88801a2f0df0 by task sshd/218 [ 31.208483] [ 31.208711] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.209593] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.210590] Call Trace: [ 31.210928] [ 31.211214] dump_stack_lvl+0x91/0xf0 [ 31.211722] print_report+0xcc/0x620 [ 31.212212] ? __virt_addr_valid+0x102/0x340 [ 31.212778] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213408] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214072] kasan_report+0xbe/0xf0 [ 31.214556] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.215184] vma_interval_tree_remove+0xc75/0xec0 [ 31.215795] vma_prepare+0xc54/0x11a0 [ 31.216292] __split_vma+0x5af/0x950 [ 31.216770] ? __pfx___split_vma+0x10/0x10 [ 31.217301] ? find_held_lock+0x2c/0x110 [ 31.217838] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.218401] ? lock_is_held_type+0x9f/0x120 [ 31.218943] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.219550] ? mtree_range_walk+0x632/0x900 [ 31.220105] ? mas_walk+0x5c7/0x7c0 [ 31.220582] do_vmi_munmap+0x1f1/0x2b0 [ 31.221078] mmap_region+0x1f9/0x2660 [ 31.221558] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.222091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.222802] ? __pfx_lock_acquire+0x10/0x10 [ 31.223338] ? __pfx_mmap_region+0x10/0x10 [ 31.223870] ? security_mmap_addr+0x7d/0xa0 [ 31.224401] ? get_unmapped_area+0x1f5/0x3f0 [ 31.224958] do_mmap+0x854/0xf00 [ 31.225400] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.225911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.226473] ksys_mmap_pgoff+0x3af/0x500 [ 31.226978] do_syscall_64+0x3f/0x90 [ 31.227453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228098] RIP: 0033:0x7f0be5adad82 [ 31.228554] 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 [ 31.230704] RSP: 002b:00007fff4b122bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.231613] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0be5adad82 [ 31.232459] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0be4f14000 [ 31.233424] RBP: 00007f0be4f14000 R08: 0000000000000009 R09: 0000000000001000 [ 31.234297] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a365338f70 [ 31.235160] R13: 00007fff4b122bf0 R14: 00007fff4b122c20 R15: 00007fff4b122f80 [ 31.236015] [ 31.236308] [ 31.236528] Allocated by task 210: [ 31.236953] kasan_save_stack+0x22/0x50 [ 31.237459] kasan_set_track+0x25/0x30 [ 31.237972] __kasan_slab_alloc+0x59/0x70 [ 31.238499] kmem_cache_alloc+0x16b/0x370 [ 31.239014] vm_area_dup+0x20/0x160 [ 31.239471] __split_vma+0x170/0x950 [ 31.239944] split_vma+0xc6/0x110 [ 31.240385] mprotect_fixup+0x8d2/0xb30 [ 31.240887] do_mprotect_pkey+0x87e/0xd40 [ 31.241404] __x64_sys_mprotect+0x78/0xc0 [ 31.241942] do_syscall_64+0x3f/0x90 [ 31.242414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.243069] [ 31.243283] Freed by task 210: [ 31.243675] kasan_save_stack+0x22/0x50 [ 31.244176] kasan_set_track+0x25/0x30 [ 31.244675] kasan_save_free_info+0x2b/0x50 [ 31.245223] __kasan_slab_free+0x10a/0x190 [ 31.245777] kmem_cache_free+0x10d/0x4d0 [ 31.246287] rcu_core+0x8c8/0x2860 [ 31.246735] __do_softirq+0x1b7/0x7d4 [ 31.247223] [ 31.247437] Last potentially related work creation: [ 31.248038] kasan_save_stack+0x22/0x50 [ 31.248542] __kasan_record_aux_stack+0x8e/0xa0 [ 31.249124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.249791] remove_vma+0x139/0x170 [ 31.250250] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.250806] do_vmi_munmap+0x1f1/0x2b0 [ 31.251290] __vm_munmap+0x138/0x3a0 [ 31.251757] __x64_sys_munmap+0x59/0x80 [ 31.252256] do_syscall_64+0x3f/0x90 [ 31.252732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253371] [ 31.253584] The buggy address belongs to the object at ffff88801a2f0d98 [ 31.253584] which belongs to the cache vm_area_struct of size 168 [ 31.255060] The buggy address is located 88 bytes inside of [ 31.255060] freed 168-byte region [ffff88801a2f0d98, ffff88801a2f0e40) [ 31.256466] [ 31.256686] The buggy address belongs to the physical page: [ 31.257388] page:000000006004a315 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2f0 [ 31.258485] memcg:ffff88801a2f1001 [ 31.258911] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.259557] page_type: 0xffffffff() [ 31.260012] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.260936] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2f1001 [ 31.261862] page dumped because: kasan: bad access detected [ 31.262524] [ 31.262744] Memory state around the buggy address: [ 31.263327] ffff88801a2f0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.264199] ffff88801a2f0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.265061] >ffff88801a2f0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.265932] ^ [ 31.266746] ffff88801a2f0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.267600] ffff88801a2f0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.268455] ================================================================== [ 31.269728] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.991769] BUG: Bad rss-counter state mm:000000003a7273a6 type:MM_FILEPAGES val:33 [ 32.992922] BUG: Bad rss-counter state mm:000000003a7273a6 type:MM_ANONPAGES val:22 [ 33.390944] BUG: Bad rss-counter state mm:0000000089435c1d type:MM_FILEPAGES val:33 [ 33.391938] BUG: Bad rss-counter state mm:0000000089435c1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57352' (ECDSA) to the list of known hosts. 2023/06/19 12:37:34 fuzzer started 2023/06/19 12:37:34 dialing manager at localhost:44161 2023/06/19 12:37:34 checking machine... 2023/06/19 12:37:34 checking revisions... [ 34.085407] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:37:35 testing simple program... [ 34.135572] cgroup: Unknown subsys name 'net' [ 34.180975] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:37:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8118ddc3 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888010336080 RIP=ffffffff813ad42f 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 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=00007f7b8de75a28 CR3=000000000c6de000 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=6a1ed853d8e28184da43e9a1374c0312 XMM02=000000000011d2a0ec2efd57dc4c00df XMM03=0000000000123c603fd4a6f0e21a605d XMM04=f3f1a23a2a42eb6a00000000000ae988 XMM05=751b9502027dc0b900000000001335a8 XMM06=bdf2e299e47b49d50000000000133430 XMM07=e042d86d42eb936e0000000000123ee0 XMM08=3fd4a6f0e21a605d000000000011d300 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d7ad63 RBX=ffff88800ebd6b18 RCX=1ffff11001d7ad6a RDX=1ffff11001da38a5 RSI=ffffffff87b86f80 RDI=ffff88800ed1c528 RBP=ffff88800eba4ea9 RSP=ffff888009537600 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800ed1c528 R13=dffffc0000000000 R14=ffff88800ed1c508 R15=ffff88800ed1c4c0 RIP=ffffffff844cde48 RFL=00000096 [--S-AP-] 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 00007ff4479b5900 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=00007ffecdf99000 CR3=000000001cc5e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000