syzkaller login: [ 34.822981] BUG: Bad rss-counter state mm:0000000021b88981 type:MM_FILEPAGES val:33 [ 34.823687] BUG: Bad rss-counter state mm:0000000021b88981 type:MM_ANONPAGES val:22 [ 34.985400] ================================================================== [ 34.986015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.990642] Read of size 8 at addr ffff88801696b880 by task sshd/219 [ 34.998854] [ 34.999007] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 34.999574] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.000207] Call Trace: [ 35.000427] [ 35.000622] dump_stack_lvl+0x91/0xf0 [ 35.000958] print_report+0xcc/0x620 [ 35.001290] ? __virt_addr_valid+0x102/0x340 [ 35.001662] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.002073] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.002483] kasan_report+0xbe/0xf0 [ 35.006844] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.007260] vma_interval_tree_remove+0xc75/0xec0 [ 35.007663] vma_prepare+0xc54/0x11a0 [ 35.007987] __split_vma+0x5af/0x950 [ 35.008307] ? __pfx___split_vma+0x10/0x10 [ 35.008663] ? find_held_lock+0x2c/0x110 [ 35.009017] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.009393] ? lock_is_held_type+0x9f/0x120 [ 35.009760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.010164] ? mtree_range_walk+0x632/0x900 [ 35.010535] ? mas_walk+0x5c7/0x7c0 [ 35.010891] do_vmi_munmap+0x1f1/0x2b0 [ 35.011213] mmap_region+0x1f9/0x2660 [ 35.011533] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.011877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.012349] ? __pfx_lock_acquire+0x10/0x10 [ 35.012703] ? __pfx_mmap_region+0x10/0x10 [ 35.013057] ? security_mmap_addr+0x7d/0xa0 [ 35.013414] ? get_unmapped_area+0x1f5/0x3f0 [ 35.013780] do_mmap+0x854/0xf00 [ 35.014076] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.014410] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.014814] ksys_mmap_pgoff+0x3af/0x500 [ 35.015156] do_syscall_64+0x3f/0x90 [ 35.015480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.015911] RIP: 0033:0x7effdda7cd82 [ 35.016218] 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 [ 35.017582] RSP: 002b:00007fff21114dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.018167] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effdda7cd82 [ 35.018772] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effdceb6000 [ 35.019321] RBP: 00007effdceb6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.019868] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581df9c7980 [ 35.020414] R13: 00007fff21114de0 R14: 00007fff21114e10 R15: 00007fff21115170 [ 35.020975] [ 35.021177] [ 35.021329] Allocated by task 212: [ 35.021639] kasan_save_stack+0x22/0x50 [ 35.022594] kasan_set_track+0x25/0x30 [ 35.023557] __kasan_slab_alloc+0x59/0x70 [ 35.024567] kmem_cache_alloc+0x16b/0x370 [ 35.025570] vm_area_dup+0x20/0x160 [ 35.026444] __split_vma+0x170/0x950 [ 35.027366] split_vma+0xc6/0x110 [ 35.028217] mprotect_fixup+0x8d2/0xb30 [ 35.029152] do_mprotect_pkey+0x87e/0xd40 [ 35.030156] __x64_sys_mprotect+0x78/0xc0 [ 35.031154] do_syscall_64+0x3f/0x90 [ 35.032066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.033327] [ 35.033717] Freed by task 212: [ 35.034458] kasan_save_stack+0x22/0x50 [ 35.035406] kasan_set_track+0x25/0x30 [ 35.036353] kasan_save_free_info+0x2b/0x50 [ 35.037417] __kasan_slab_free+0x10a/0x190 [ 35.038461] kmem_cache_free+0x10d/0x4d0 [ 35.039445] rcu_core+0x8c8/0x2860 [ 35.040281] __do_softirq+0x1b7/0x7d4 [ 35.041188] [ 35.041583] Last potentially related work creation: [ 35.042736] kasan_save_stack+0x22/0x50 [ 35.043690] __kasan_record_aux_stack+0x8e/0xa0 [ 35.044817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.046069] remove_vma+0x139/0x170 [ 35.046962] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.048044] do_vmi_munmap+0x1f1/0x2b0 [ 35.049007] __vm_munmap+0x138/0x3a0 [ 35.049945] __x64_sys_munmap+0x59/0x80 [ 35.050929] do_syscall_64+0x3f/0x90 [ 35.051861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.053134] [ 35.053543] Second to last potentially related work creation: [ 35.054938] kasan_save_stack+0x22/0x50 [ 35.055900] __kasan_record_aux_stack+0x8e/0xa0 [ 35.057041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.058311] remove_vma+0x139/0x170 [ 35.059211] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.060320] do_vmi_munmap+0x1f1/0x2b0 [ 35.061278] mmap_region+0x1f9/0x2660 [ 35.062197] do_mmap+0x854/0xf00 [ 35.063007] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.063944] ksys_mmap_pgoff+0x3af/0x500 [ 35.064920] do_syscall_64+0x3f/0x90 [ 35.065818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.067079] [ 35.067485] The buggy address belongs to the object at ffff88801696b828 [ 35.067485] which belongs to the cache vm_area_struct of size 168 [ 35.070504] The buggy address is located 88 bytes inside of [ 35.070504] freed 168-byte region [ffff88801696b828, ffff88801696b8d0) [ 35.073360] [ 35.073752] The buggy address belongs to the physical page: [ 35.075084] page:00000000b1299ced refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1696b [ 35.077301] memcg:ffff888016eaeb01 [ 35.078114] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.079410] page_type: 0xffffffff() [ 35.080285] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c25c0 0000000000000006 [ 35.082158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016eaeb01 [ 35.084009] page dumped because: kasan: bad access detected [ 35.085351] [ 35.085741] Memory state around the buggy address: [ 35.086924] ffff88801696b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.088655] ffff88801696b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.090383] >ffff88801696b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.092184] ^ [ 35.092982] ffff88801696b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.094771] ffff88801696b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.096570] ================================================================== [ 35.098598] Disabling lock debugging due to kernel taint [ 40.196757] BUG: Bad rss-counter state mm:00000000f1bef3f0 type:MM_FILEPAGES val:33 [ 40.197433] BUG: Bad rss-counter state mm:00000000f1bef3f0 type:MM_ANONPAGES val:22 [ 40.880768] BUG: Bad rss-counter state mm:00000000456018a7 type:MM_FILEPAGES val:33 [ 40.881410] BUG: Bad rss-counter state mm:00000000456018a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9586' (ECDSA) to the list of known hosts. 2023/06/21 08:06:18 fuzzer started 2023/06/21 08:06:18 dialing manager at localhost:36067 2023/06/21 08:06:18 checking machine... 2023/06/21 08:06:18 checking revisions... [ 41.814770] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:06:18 testing simple program... [ 41.867585] cgroup: Unknown subsys name 'net' [ 41.915176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:06:18 Registers: info registers vcpu 0 RAX=1ffffd40000dc448 RBX=ffffea00006e2240 RCX=ffffffff8170c40d RDX=fffff940000dc449 RSI=0000000000000008 RDI=ffffea00006e2240 RBP=0000000000000001 RSP=ffff888010107640 R8 =0000000000000000 R9 =fffff940000dc448 R10=ffffea00006e2247 R11=0000000000000001 R12=0000000000000000 R13=00007f1671d0d000 R14=ffff88800e794860 R15=dffffc0000000000 RIP=ffffffff8170c41e 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 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=00007f1671da2790 CR3=00000000167da000 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=0000000000000340fffffffe7ffbfeff XMM01=00000000000000000000000000000000 XMM02=00000000000000020000000000000000 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008da7bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b4f77 RIP=ffffffff845368c8 RFL=00000002 [-------] 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 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=000055bb8023d4d0 CR3=000000000f302000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000