[ 23.945211] BUG: Bad rss-counter state mm:000000002fab6418 type:MM_FILEPAGES val:33 [ 23.946442] BUG: Bad rss-counter state mm:000000002fab6418 type:MM_ANONPAGES val:22 [ 23.976595] ================================================================== [ 23.977297] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.978030] Read of size 8 at addr ffff88800ea38228 by task sshd/219 [ 23.978625] [ 23.978791] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.979459] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.980213] Call Trace: [ 23.980462] [ 23.980803] dump_stack_lvl+0x91/0xf0 [ 23.981307] print_report+0xcc/0x620 [ 23.981615] ? __virt_addr_valid+0x102/0x340 [ 23.981967] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.982349] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.982743] kasan_report+0xbe/0xf0 [ 23.983055] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.983469] vma_interval_tree_remove+0xc75/0xec0 [ 23.983865] vma_prepare+0xc54/0x11a0 [ 23.984170] __split_vma+0x5af/0x950 [ 23.984477] ? __pfx___split_vma+0x10/0x10 [ 23.984816] ? find_held_lock+0x2c/0x110 [ 23.985154] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.985521] ? lock_is_held_type+0x9f/0x120 [ 23.985872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.986266] ? mtree_range_walk+0x632/0x900 [ 23.986616] ? mas_walk+0x5c7/0x7c0 [ 23.986916] do_vmi_munmap+0x1f1/0x2b0 [ 23.987240] mmap_region+0x1f9/0x2660 [ 23.987627] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.987957] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.988416] ? __pfx_lock_acquire+0x10/0x10 [ 23.988756] ? __pfx_mmap_region+0x10/0x10 [ 23.989093] ? security_mmap_addr+0x7d/0xa0 [ 23.989433] ? get_unmapped_area+0x1f5/0x3f0 [ 23.989789] do_mmap+0x854/0xf00 [ 23.990070] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.990386] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.990741] ksys_mmap_pgoff+0x3af/0x500 [ 23.991079] do_syscall_64+0x3f/0x90 [ 23.991383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.991795] RIP: 0033:0x7fce99049d82 [ 23.992087] 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 [ 23.993447] RSP: 002b:00007ffc6c5edce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.994023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce99049d82 [ 23.994567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce98483000 [ 23.995120] RBP: 00007fce98483000 R08: 0000000000000009 R09: 0000000000001000 [ 23.995654] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ad755aec0 [ 23.996192] R13: 00007ffc6c5edd00 R14: 00007ffc6c5edd30 R15: 00007ffc6c5ee090 [ 23.996745] [ 23.996931] [ 23.997066] Allocated by task 212: [ 23.997338] kasan_save_stack+0x22/0x50 [ 23.997661] kasan_set_track+0x25/0x30 [ 23.997978] __kasan_slab_alloc+0x59/0x70 [ 23.998308] kmem_cache_alloc+0x16b/0x370 [ 23.998632] vm_area_dup+0x20/0x160 [ 23.998924] __split_vma+0x170/0x950 [ 23.999238] split_vma+0xc6/0x110 [ 23.999516] mprotect_fixup+0x8d2/0xb30 [ 23.999835] do_mprotect_pkey+0x87e/0xd40 [ 24.000168] __x64_sys_mprotect+0x78/0xc0 [ 24.000497] do_syscall_64+0x3f/0x90 [ 24.000800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.001210] [ 24.001344] Freed by task 19: [ 24.001595] kasan_save_stack+0x22/0x50 [ 24.001919] kasan_set_track+0x25/0x30 [ 24.002231] kasan_save_free_info+0x2b/0x50 [ 24.002573] __kasan_slab_free+0x10a/0x190 [ 24.002912] kmem_cache_free+0x10d/0x4d0 [ 24.003238] rcu_core+0x8c8/0x2860 [ 24.003524] __do_softirq+0x1b7/0x7d4 [ 24.003833] [ 24.003970] Last potentially related work creation: [ 24.004343] kasan_save_stack+0x22/0x50 [ 24.004661] __kasan_record_aux_stack+0x8e/0xa0 [ 24.005027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.005444] remove_vma+0x139/0x170 [ 24.005728] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.006082] do_vmi_munmap+0x1f1/0x2b0 [ 24.006392] __vm_munmap+0x138/0x3a0 [ 24.006689] __x64_sys_munmap+0x59/0x80 [ 24.007020] do_syscall_64+0x3f/0x90 [ 24.007326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.007746] [ 24.007882] Second to last potentially related work creation: [ 24.008320] kasan_save_stack+0x22/0x50 [ 24.008644] __kasan_record_aux_stack+0x8e/0xa0 [ 24.009012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.009424] remove_vma+0x139/0x170 [ 24.009714] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.010073] do_vmi_munmap+0x1f1/0x2b0 [ 24.010386] mmap_region+0x1f9/0x2660 [ 24.010690] do_mmap+0x854/0xf00 [ 24.010961] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.011285] ksys_mmap_pgoff+0x7d/0x500 [ 24.011596] do_syscall_64+0x3f/0x90 [ 24.011894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.012305] [ 24.012440] The buggy address belongs to the object at ffff88800ea381d0 [ 24.012440] which belongs to the cache vm_area_struct of size 168 [ 24.013390] The buggy address is located 88 bytes inside of [ 24.013390] freed 168-byte region [ffff88800ea381d0, ffff88800ea38278) [ 24.014281] [ 24.014417] The buggy address belongs to the physical page: [ 24.014841] page:00000000b4053ce1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea38 [ 24.015533] memcg:ffff88800de98801 [ 24.015808] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.016252] page_type: 0xffffffff() [ 24.016538] raw: 0100000000000200 ffff8880087a0c80 ffffea0000329bc0 dead000000000003 [ 24.017116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de98801 [ 24.017698] page dumped because: kasan: bad access detected [ 24.018120] [ 24.018258] Memory state around the buggy address: [ 24.018628] ffff88800ea38100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.019181] ffff88800ea38180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.019725] >ffff88800ea38200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.020259] ^ [ 24.020611] ffff88800ea38280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.021154] ffff88800ea38300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.021704] ================================================================== [ 24.022466] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.251853] BUG: Bad rss-counter state mm:000000001a104675 type:MM_FILEPAGES val:33 [ 26.252816] BUG: Bad rss-counter state mm:000000001a104675 type:MM_ANONPAGES val:22 [ 26.698675] BUG: Bad rss-counter state mm:0000000071a1e2b3 type:MM_FILEPAGES val:33 [ 26.699687] BUG: Bad rss-counter state mm:0000000071a1e2b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26141' (ECDSA) to the list of known hosts. 2023/06/20 17:03:26 fuzzer started 2023/06/20 17:03:26 dialing manager at localhost:36067 2023/06/20 17:03:26 checking machine... 2023/06/20 17:03:26 checking revisions... [ 27.340473] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:03:26 testing simple program... [ 27.387497] cgroup: Unknown subsys name 'net' [ 27.448315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:03:26 Registers: info registers vcpu 0 RAX=00009e8a70877561 RBX=6b1e99b806172e3b RCX=000000000000acf8 RDX=0000000000004c43 RSI=0000000000000000 RDI=00005622a31f36d0 RBP=000000000000002c RSP=00007ffe7ff6a3d0 R8 =00007ffe7ff6a480 R9 =00007ffe7ff6a488 R10=00007f53aeb52a68 R11=0000000000656434 R12=00007ffe7ff6b4e1 R13=6b1e99b806172e3b R14=00005622a31f36d0 R15=00007ffe7ff6a480 RIP=00007f53aeae1168 RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f53adf5d900 00000000 00000000 GS =0000 0000000000000000 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=00007f53ad3d24b0 CR3=000000000d830000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f9ae5fb7b46c752400000000000ae988 XMM05=31c674ecaaf7da8400000000001333b8 XMM06=dfcdbad4f1609c370000000000132190 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd7408be08 CR3=000000000fbba000 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=2036323a33303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000