[ 38.635163] BUG: Bad rss-counter state mm:000000007c2992d8 type:MM_FILEPAGES val:33 [ 38.636211] BUG: Bad rss-counter state mm:000000007c2992d8 type:MM_ANONPAGES val:22 [ 38.788441] ================================================================== [ 38.789370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.790327] Read of size 8 at addr ffff88801a284880 by task sshd/219 [ 38.791110] [ 38.791340] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.792365] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.793351] Call Trace: [ 38.793753] [ 38.794118] dump_stack_lvl+0x91/0xf0 [ 38.794697] print_report+0xcc/0x620 [ 38.795265] ? __virt_addr_valid+0x102/0x340 [ 38.795938] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.796671] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.797398] kasan_report+0xbe/0xf0 [ 38.797965] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.798730] vma_interval_tree_remove+0xc75/0xec0 [ 38.799469] vma_prepare+0xc54/0x11a0 [ 38.800068] __split_vma+0x5af/0x950 [ 38.800650] ? __pfx___split_vma+0x10/0x10 [ 38.801297] ? find_held_lock+0x2c/0x110 [ 38.801938] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.802630] ? lock_is_held_type+0x9f/0x120 [ 38.803295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.804049] ? mtree_range_walk+0x632/0x900 [ 38.804607] ? mas_walk+0x5c7/0x7c0 [ 38.805080] do_vmi_munmap+0x1f1/0x2b0 [ 38.805575] mmap_region+0x1f9/0x2660 [ 38.806063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.806576] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.807287] ? __pfx_lock_acquire+0x10/0x10 [ 38.807824] ? __pfx_mmap_region+0x10/0x10 [ 38.808355] ? security_mmap_addr+0x7d/0xa0 [ 38.808889] ? get_unmapped_area+0x1f5/0x3f0 [ 38.809439] do_mmap+0x854/0xf00 [ 38.809888] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.810388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.810954] ksys_mmap_pgoff+0x3af/0x500 [ 38.811464] do_syscall_64+0x3f/0x90 [ 38.811956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.812602] RIP: 0033:0x7fadae84ed82 [ 38.813068] 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 [ 38.815170] RSP: 002b:00007ffd07541088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.816101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadae84ed82 [ 38.816956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadadc88000 [ 38.817800] RBP: 00007fadadc88000 R08: 0000000000000009 R09: 0000000000001000 [ 38.818656] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557df0339f70 [ 38.819506] R13: 00007ffd075410a0 R14: 00007ffd075410d0 R15: 00007ffd07541430 [ 38.820381] [ 38.820677] [ 38.820890] Allocated by task 211: [ 38.821324] kasan_save_stack+0x22/0x50 [ 38.821828] kasan_set_track+0x25/0x30 [ 38.822326] __kasan_slab_alloc+0x59/0x70 [ 38.822846] kmem_cache_alloc+0x16b/0x370 [ 38.823362] vm_area_dup+0x20/0x160 [ 38.823836] __split_vma+0x170/0x950 [ 38.824305] split_vma+0xc6/0x110 [ 38.824743] mprotect_fixup+0x8d2/0xb30 [ 38.825247] do_mprotect_pkey+0x87e/0xd40 [ 38.825773] __x64_sys_mprotect+0x78/0xc0 [ 38.826303] do_syscall_64+0x3f/0x90 [ 38.826782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.827431] [ 38.827647] Freed by task 203: [ 38.828050] kasan_save_stack+0x22/0x50 [ 38.828548] kasan_set_track+0x25/0x30 [ 38.829037] kasan_save_free_info+0x2b/0x50 [ 38.829575] __kasan_slab_free+0x10a/0x190 [ 38.830112] kmem_cache_free+0x10d/0x4d0 [ 38.830618] rcu_core+0x8c8/0x2860 [ 38.831077] __do_softirq+0x1b7/0x7d4 [ 38.831557] [ 38.831801] Last potentially related work creation: [ 38.832400] kasan_save_stack+0x22/0x50 [ 38.832909] __kasan_record_aux_stack+0x8e/0xa0 [ 38.833579] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.834226] remove_vma+0x139/0x170 [ 38.834684] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.835241] do_vmi_munmap+0x1f1/0x2b0 [ 38.835736] __vm_munmap+0x138/0x3a0 [ 38.836228] __x64_sys_munmap+0x59/0x80 [ 38.836729] do_syscall_64+0x3f/0x90 [ 38.837200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.837835] [ 38.838049] The buggy address belongs to the object at ffff88801a284828 [ 38.838049] which belongs to the cache vm_area_struct of size 168 [ 38.839532] The buggy address is located 88 bytes inside of [ 38.839532] freed 168-byte region [ffff88801a284828, ffff88801a2848d0) [ 38.840942] [ 38.841159] The buggy address belongs to the physical page: [ 38.841823] page:000000005bc7b716 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a284 [ 38.842908] memcg:ffff88800e32c101 [ 38.843335] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.843986] page_type: 0xffffffff() [ 38.844436] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.845361] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e32c101 [ 38.846275] page dumped because: kasan: bad access detected [ 38.846947] [ 38.847161] Memory state around the buggy address: [ 38.847756] ffff88801a284780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.848620] ffff88801a284800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.849475] >ffff88801a284880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.850327] ^ [ 38.850743] ffff88801a284900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.851593] ffff88801a284980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.852457] ================================================================== [ 38.853556] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.469907] BUG: Bad rss-counter state mm:00000000a98b4a6b type:MM_FILEPAGES val:33 [ 41.470892] BUG: Bad rss-counter state mm:00000000a98b4a6b type:MM_ANONPAGES val:22 [ 41.841481] BUG: Bad rss-counter state mm:00000000994fbece type:MM_FILEPAGES val:33 [ 41.842473] BUG: Bad rss-counter state mm:00000000994fbece type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54795' (ECDSA) to the list of known hosts. 2023/06/19 12:15:27 fuzzer started 2023/06/19 12:15:27 dialing manager at localhost:44161 2023/06/19 12:15:27 checking machine... 2023/06/19 12:15:27 checking revisions... [ 42.538769] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:15:27 testing simple program... [ 42.585939] cgroup: Unknown subsys name 'net' [ 42.622244] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:15:19 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=00007f0b8c385366 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f0b8c385366 RSP=ffff8880181ef640 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f0b8c385000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fead1c0 R15=0000000000092cc0 RIP=ffffffff811fc73d RFL=00000202 [-------] 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 00007f0b8be92900 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=00007ffc1d255000 CR3=000000000dd90000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f887286db20 CR3=000000000cac4000 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=25b31f91544fc792c349951b74d46fa7 XMM02=000000000011d2e0eff9b2d0a8fce9cb XMM03=000000000011d3b02c67c8bc2e329bc3 XMM04=ee3e7e319c54543800000000000ae988 XMM05=dfcdbad4f1609c3700000000001339b0 XMM06=bd43e00a71e0118e0000000000132b88 XMM07=e042d86d42eb936e0000000000124378 XMM08=faf1d30af95c4c27000000000011d3b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000