[ 30.991835] BUG: Bad rss-counter state mm:00000000831384fe type:MM_FILEPAGES val:33 [ 30.993038] BUG: Bad rss-counter state mm:00000000831384fe type:MM_ANONPAGES val:22 [ 31.026730] ================================================================== [ 31.027674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.028726] Read of size 8 at addr ffff88801bc1d4e0 by task sshd/220 [ 31.029563] [ 31.029795] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.030750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.031812] Call Trace: [ 31.032158] [ 31.032462] dump_stack_lvl+0x91/0xf0 [ 31.033004] print_report+0xcc/0x620 [ 31.033523] ? __virt_addr_valid+0x102/0x340 [ 31.034117] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.034787] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035455] kasan_report+0xbe/0xf0 [ 31.035968] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036619] vma_interval_tree_remove+0xc75/0xec0 [ 31.037234] vma_prepare+0xc54/0x11a0 [ 31.037737] __split_vma+0x5af/0x950 [ 31.038230] ? __pfx___split_vma+0x10/0x10 [ 31.038801] ? find_held_lock+0x2c/0x110 [ 31.039351] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.039939] ? lock_is_held_type+0x9f/0x120 [ 31.040504] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.041169] ? mtree_range_walk+0x632/0x900 [ 31.041758] ? mas_walk+0x5c7/0x7c0 [ 31.042260] do_vmi_munmap+0x1f1/0x2b0 [ 31.042781] mmap_region+0x1f9/0x2660 [ 31.043285] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.043827] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.044573] ? __pfx_lock_acquire+0x10/0x10 [ 31.045145] ? __pfx_mmap_region+0x10/0x10 [ 31.045698] ? security_mmap_addr+0x7d/0xa0 [ 31.046256] ? get_unmapped_area+0x1f5/0x3f0 [ 31.046828] do_mmap+0x854/0xf00 [ 31.047290] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.047801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.048392] ksys_mmap_pgoff+0x3af/0x500 [ 31.048936] do_syscall_64+0x3f/0x90 [ 31.049442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.050132] RIP: 0033:0x7efc40ea9d82 [ 31.050615] 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 [ 31.052882] RSP: 002b:00007ffcca9e7068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.053831] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc40ea9d82 [ 31.054721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc402e3000 [ 31.055617] RBP: 00007efc402e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.056514] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a8d6e33ec0 [ 31.057425] R13: 00007ffcca9e7080 R14: 00007ffcca9e70b0 R15: 00007ffcca9e7410 [ 31.058326] [ 31.058630] [ 31.058851] Allocated by task 210: [ 31.059305] kasan_save_stack+0x22/0x50 [ 31.059836] kasan_set_track+0x25/0x30 [ 31.060345] __kasan_slab_alloc+0x59/0x70 [ 31.060898] kmem_cache_alloc+0x16b/0x370 [ 31.061439] vm_area_dup+0x20/0x160 [ 31.061921] __split_vma+0x170/0x950 [ 31.062410] split_vma+0xc6/0x110 [ 31.062871] mprotect_fixup+0x8d2/0xb30 [ 31.063395] do_mprotect_pkey+0x87e/0xd40 [ 31.063940] __x64_sys_mprotect+0x78/0xc0 [ 31.064488] do_syscall_64+0x3f/0x90 [ 31.065001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.065679] [ 31.065903] Freed by task 19: [ 31.066303] kasan_save_stack+0x22/0x50 [ 31.066833] kasan_set_track+0x25/0x30 [ 31.067348] kasan_save_free_info+0x2b/0x50 [ 31.067909] __kasan_slab_free+0x10a/0x190 [ 31.068471] kmem_cache_free+0x10d/0x4d0 [ 31.069005] rcu_core+0x8c8/0x2860 [ 31.069474] __do_softirq+0x1b7/0x7d4 [ 31.069976] [ 31.070199] Last potentially related work creation: [ 31.070809] kasan_save_stack+0x22/0x50 [ 31.071341] __kasan_record_aux_stack+0x8e/0xa0 [ 31.071940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.072608] remove_vma+0x139/0x170 [ 31.073094] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.073676] do_vmi_munmap+0x1f1/0x2b0 [ 31.074197] __vm_munmap+0x138/0x3a0 [ 31.074684] __x64_sys_munmap+0x59/0x80 [ 31.075204] do_syscall_64+0x3f/0x90 [ 31.075711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076394] [ 31.076619] The buggy address belongs to the object at ffff88801bc1d488 [ 31.076619] which belongs to the cache vm_area_struct of size 168 [ 31.078166] The buggy address is located 88 bytes inside of [ 31.078166] freed 168-byte region [ffff88801bc1d488, ffff88801bc1d530) [ 31.079659] [ 31.079886] The buggy address belongs to the physical page: [ 31.080583] page:000000002690dccc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc1d [ 31.081740] memcg:ffff88801a7aac01 [ 31.082191] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.082869] page_type: 0xffffffff() [ 31.083348] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.084320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a7aac01 [ 31.085281] page dumped because: kasan: bad access detected [ 31.085980] [ 31.086205] Memory state around the buggy address: [ 31.086814] ffff88801bc1d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.087710] ffff88801bc1d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.088613] >ffff88801bc1d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.089524] ^ [ 31.090317] ffff88801bc1d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.091218] ffff88801bc1d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.092117] ================================================================== [ 31.093218] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.970567] BUG: Bad rss-counter state mm:0000000058be9c73 type:MM_FILEPAGES val:33 [ 33.972103] BUG: Bad rss-counter state mm:0000000058be9c73 type:MM_ANONPAGES val:22 [ 34.491544] BUG: Bad rss-counter state mm:00000000afb4815b type:MM_FILEPAGES val:33 [ 34.492624] BUG: Bad rss-counter state mm:00000000afb4815b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20607' (ECDSA) to the list of known hosts. 2023/06/21 00:11:40 fuzzer started 2023/06/21 00:11:40 dialing manager at localhost:36067 2023/06/21 00:11:40 checking machine... 2023/06/21 00:11:40 checking revisions... [ 35.270817] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:11:40 testing simple program... [ 35.315390] cgroup: Unknown subsys name 'net' [ 35.374037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:11:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd5be00a58 CR3=000000000b882000 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=2030343a31313a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31313a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888018d5fb64 RSI=ffffffff818d4f93 RDI=ffff8880143d5028 RBP=ffff888018d5fb30 RSP=ffff888018d5f998 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000001 R12=0000000000000040 R13=ffff8880143d5028 R14=ffff888018d5fb58 R15=ffff888018d5fb30 RIP=ffffffff814c0871 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 00007fa431aaf900 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=00007fa432064650 CR3=000000001a6a4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000