[ 27.090576] BUG: Bad rss-counter state mm:0000000004ecaa9c type:MM_FILEPAGES val:33 [ 27.091588] BUG: Bad rss-counter state mm:0000000004ecaa9c type:MM_ANONPAGES val:22 [ 27.251340] ================================================================== [ 27.252253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.253197] Read of size 8 at addr ffff88800da8d310 by task sshd/218 [ 27.253970] [ 27.254188] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.255156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.256260] Call Trace: [ 27.256665] [ 27.257010] dump_stack_lvl+0x91/0xf0 [ 27.257615] print_report+0xcc/0x620 [ 27.258203] ? __virt_addr_valid+0x102/0x340 [ 27.258894] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.259706] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.260507] kasan_report+0xbe/0xf0 [ 27.261134] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.261954] vma_interval_tree_remove+0xc75/0xec0 [ 27.262739] vma_prepare+0xc54/0x11a0 [ 27.263348] __split_vma+0x5af/0x950 [ 27.263995] ? __pfx___split_vma+0x10/0x10 [ 27.264691] ? find_held_lock+0x2c/0x110 [ 27.265352] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.266091] ? lock_is_held_type+0x9f/0x120 [ 27.266792] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.267553] ? mtree_range_walk+0x632/0x900 [ 27.268259] ? mas_walk+0x5c7/0x7c0 [ 27.268865] do_vmi_munmap+0x1f1/0x2b0 [ 27.269482] mmap_region+0x1f9/0x2660 [ 27.270092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.270745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.271695] ? __pfx_lock_acquire+0x10/0x10 [ 27.272281] ? __pfx_mmap_region+0x10/0x10 [ 27.272828] ? security_mmap_addr+0x7d/0xa0 [ 27.273367] ? get_unmapped_area+0x1f5/0x3f0 [ 27.273936] do_mmap+0x854/0xf00 [ 27.274386] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.274903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.275476] ksys_mmap_pgoff+0x3af/0x500 [ 27.276003] do_syscall_64+0x3f/0x90 [ 27.276479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.277139] RIP: 0033:0x7f8708dadd82 [ 27.277615] 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 [ 27.279771] RSP: 002b:00007fffa54b9928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.280699] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8708dadd82 [ 27.281572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87081e7000 [ 27.282420] RBP: 00007f87081e7000 R08: 0000000000000009 R09: 0000000000001000 [ 27.283290] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566224eff70 [ 27.284163] R13: 00007fffa54b9940 R14: 00007fffa54b9970 R15: 00007fffa54b9cd0 [ 27.285047] [ 27.285345] [ 27.285574] Allocated by task 206: [ 27.286007] kasan_save_stack+0x22/0x50 [ 27.286516] kasan_set_track+0x25/0x30 [ 27.287038] __kasan_slab_alloc+0x59/0x70 [ 27.287588] kmem_cache_alloc+0x16b/0x370 [ 27.288131] vm_area_dup+0x20/0x160 [ 27.288595] __split_vma+0x170/0x950 [ 27.289061] split_vma+0xc6/0x110 [ 27.289504] mprotect_fixup+0x8d2/0xb30 [ 27.290038] do_mprotect_pkey+0x87e/0xd40 [ 27.290570] __x64_sys_mprotect+0x78/0xc0 [ 27.291091] do_syscall_64+0x3f/0x90 [ 27.291588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.292267] [ 27.292482] Freed by task 206: [ 27.292885] kasan_save_stack+0x22/0x50 [ 27.293392] kasan_set_track+0x25/0x30 [ 27.293910] kasan_save_free_info+0x2b/0x50 [ 27.294455] __kasan_slab_free+0x10a/0x190 [ 27.294999] kmem_cache_free+0x10d/0x4d0 [ 27.295515] rcu_core+0x8c8/0x2860 [ 27.295993] __do_softirq+0x1b7/0x7d4 [ 27.296474] [ 27.296705] Last potentially related work creation: [ 27.297296] kasan_save_stack+0x22/0x50 [ 27.297810] __kasan_record_aux_stack+0x8e/0xa0 [ 27.298379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.299042] remove_vma+0x139/0x170 [ 27.299495] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.300083] do_vmi_munmap+0x1f1/0x2b0 [ 27.300590] __vm_munmap+0x138/0x3a0 [ 27.301057] __x64_sys_munmap+0x59/0x80 [ 27.301570] do_syscall_64+0x3f/0x90 [ 27.302049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.302719] [ 27.302937] The buggy address belongs to the object at ffff88800da8d2b8 [ 27.302937] which belongs to the cache vm_area_struct of size 168 [ 27.304441] The buggy address is located 88 bytes inside of [ 27.304441] freed 168-byte region [ffff88800da8d2b8, ffff88800da8d360) [ 27.305865] [ 27.306083] The buggy address belongs to the physical page: [ 27.306757] page:000000002ecb9ad5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda8d [ 27.307871] memcg:ffff8880096a2b01 [ 27.308297] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 27.309009] page_type: 0xffffffff() [ 27.309480] raw: 0100000000000200 ffff88800879fc80 ffffea000031eb00 0000000000000009 [ 27.310405] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096a2b01 [ 27.311318] page dumped because: kasan: bad access detected [ 27.312007] [ 27.312224] Memory state around the buggy address: [ 27.312822] ffff88800da8d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 27.313700] ffff88800da8d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 27.314566] >ffff88800da8d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 27.315419] ^ [ 27.315935] ffff88800da8d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 27.316818] ffff88800da8d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 27.317695] ================================================================== [ 27.318743] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.196640] BUG: Bad rss-counter state mm:00000000899fda80 type:MM_FILEPAGES val:33 [ 29.197632] BUG: Bad rss-counter state mm:00000000899fda80 type:MM_ANONPAGES val:22 [ 29.721791] BUG: Bad rss-counter state mm:00000000dce59e3f type:MM_FILEPAGES val:33 [ 29.722805] BUG: Bad rss-counter state mm:00000000dce59e3f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45890' (ECDSA) to the list of known hosts. 2023/06/19 13:44:17 fuzzer started 2023/06/19 13:44:17 dialing manager at localhost:44161 2023/06/19 13:44:17 checking machine... 2023/06/19 13:44:17 checking revisions... [ 30.465622] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:44:17 testing simple program... [ 30.506355] cgroup: Unknown subsys name 'net' [ 30.549754] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:44:14 Registers: info registers vcpu 0 RAX=1ffffffff0c0abd3 RBX=ffffffff86055e98 RCX=ffffffff8661f20e RDX=0000000000000000 RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86055e90 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86055ea0 R13=ffffffff85d793d4 R14=ffffffff86055e8c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 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=00007f1d95f0c600 CR3=000000000c9ae000 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=caa51d4e4f0ad9bcd44bd01ab33e24f6 XMM02=2c67c8bc2e329bc3000000000011cb48 XMM03=fb795ef6d657705600000000001220b8 XMM04=b9ad2d4a287ccf1200000000000ae988 XMM05=dcfd3906831fadce0000000000133f78 XMM06=bdf2e299e47b49d50000000000132ca8 XMM07=e042d86d42eb936e0000000000122390 XMM08=e6a01ae0de3b9dd8000000000011cba8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888017dffaf8 RCX=0000000000000000 RDX=ffff888017d1b680 RSI=ffffffff8174b47d RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888017dffa48 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffff888017dffb18 R13=ffff88801a2a4488 R14=0000000000000000 R15=00007faf2c614000 RIP=ffffffff814c081b 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 00007faf2c628900 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=00007faf2c602c94 CR3=000000001a182000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000