syzkaller login: [ 44.615937] BUG: Bad rss-counter state mm:00000000651b7134 type:MM_FILEPAGES val:33 [ 44.617278] BUG: Bad rss-counter state mm:00000000651b7134 type:MM_ANONPAGES val:22 [ 44.767530] ================================================================== [ 44.768615] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.769558] Read of size 8 at addr ffff888015f0e968 by task sshd/220 [ 44.770465] [ 44.770683] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.771566] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.772554] Call Trace: [ 44.772874] [ 44.773164] dump_stack_lvl+0x91/0xf0 [ 44.773661] print_report+0xcc/0x620 [ 44.774148] ? __virt_addr_valid+0x102/0x340 [ 44.774696] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.775316] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.775943] kasan_report+0xbe/0xf0 [ 44.776447] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.777074] vma_interval_tree_remove+0xc75/0xec0 [ 44.777676] vma_prepare+0xc54/0x11a0 [ 44.778153] __split_vma+0x5af/0x950 [ 44.778625] ? __pfx___split_vma+0x10/0x10 [ 44.779162] ? find_held_lock+0x2c/0x110 [ 44.779692] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.780269] ? lock_is_held_type+0x9f/0x120 [ 44.780811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.781412] ? mtree_range_walk+0x632/0x900 [ 44.781963] ? mas_walk+0x5c7/0x7c0 [ 44.782447] do_vmi_munmap+0x1f1/0x2b0 [ 44.782937] mmap_region+0x1f9/0x2660 [ 44.783420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.783933] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.784658] ? __pfx_lock_acquire+0x10/0x10 [ 44.785195] ? __pfx_mmap_region+0x10/0x10 [ 44.785724] ? security_mmap_addr+0x7d/0xa0 [ 44.786252] ? get_unmapped_area+0x1f5/0x3f0 [ 44.786799] do_mmap+0x854/0xf00 [ 44.787235] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.787738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.788319] ksys_mmap_pgoff+0x3af/0x500 [ 44.788825] do_syscall_64+0x3f/0x90 [ 44.789298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.789948] RIP: 0033:0x7f67bf9aad82 [ 44.790400] 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 [ 44.792513] RSP: 002b:00007ffd3560c548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.793411] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67bf9aad82 [ 44.794269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67bede4000 [ 44.795126] RBP: 00007f67bede4000 R08: 0000000000000009 R09: 0000000000001000 [ 44.795975] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f26a434b20 [ 44.796864] R13: 00007ffd3560c560 R14: 00007ffd3560c590 R15: 00007ffd3560c8f0 [ 44.797716] [ 44.798013] [ 44.798231] Allocated by task 212: [ 44.798668] kasan_save_stack+0x22/0x50 [ 44.799173] kasan_set_track+0x25/0x30 [ 44.799664] __kasan_slab_alloc+0x59/0x70 [ 44.800193] kmem_cache_alloc+0x16b/0x370 [ 44.800708] vm_area_dup+0x20/0x160 [ 44.801162] __split_vma+0x170/0x950 [ 44.801631] split_vma+0xc6/0x110 [ 44.802078] mprotect_fixup+0x8d2/0xb30 [ 44.802580] do_mprotect_pkey+0x87e/0xd40 [ 44.803094] __x64_sys_mprotect+0x78/0xc0 [ 44.803610] do_syscall_64+0x3f/0x90 [ 44.804094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.804743] [ 44.804962] Freed by task 203: [ 44.805357] kasan_save_stack+0x22/0x50 [ 44.805854] kasan_set_track+0x25/0x30 [ 44.806340] kasan_save_free_info+0x2b/0x50 [ 44.806865] __kasan_slab_free+0x10a/0x190 [ 44.807391] kmem_cache_free+0x10d/0x4d0 [ 44.807908] rcu_core+0x8c8/0x2860 [ 44.808367] __do_softirq+0x1b7/0x7d4 [ 44.808841] [ 44.809054] Last potentially related work creation: [ 44.809643] kasan_save_stack+0x22/0x50 [ 44.810152] __kasan_record_aux_stack+0x8e/0xa0 [ 44.810734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.811428] remove_vma+0x139/0x170 [ 44.811879] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.812532] do_vmi_munmap+0x1f1/0x2b0 [ 44.813020] __vm_munmap+0x138/0x3a0 [ 44.813489] __x64_sys_munmap+0x59/0x80 [ 44.813987] do_syscall_64+0x3f/0x90 [ 44.814472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.815120] [ 44.815337] Second to last potentially related work creation: [ 44.816049] kasan_save_stack+0x22/0x50 [ 44.816551] __kasan_record_aux_stack+0x8e/0xa0 [ 44.817126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.817802] remove_vma+0x139/0x170 [ 44.818264] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.818821] do_vmi_munmap+0x1f1/0x2b0 [ 44.819310] mmap_region+0x1f9/0x2660 [ 44.819788] do_mmap+0x854/0xf00 [ 44.820234] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.820727] ksys_mmap_pgoff+0x3af/0x500 [ 44.821227] do_syscall_64+0x3f/0x90 [ 44.821697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.822342] [ 44.822562] The buggy address belongs to the object at ffff888015f0e910 [ 44.822562] which belongs to the cache vm_area_struct of size 168 [ 44.824050] The buggy address is located 88 bytes inside of [ 44.824050] freed 168-byte region [ffff888015f0e910, ffff888015f0e9b8) [ 44.825460] [ 44.825675] The buggy address belongs to the physical page: [ 44.826341] page:00000000e9a417e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f0e [ 44.827445] memcg:ffff888015f00801 [ 44.827872] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.828534] page_type: 0xffffffff() [ 44.828982] raw: 0100000000000200 ffff88800879fc80 ffffea0000365100 dead000000000002 [ 44.829908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f00801 [ 44.830816] page dumped because: kasan: bad access detected [ 44.831482] [ 44.831695] Memory state around the buggy address: [ 44.832277] ffff888015f0e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 44.833122] ffff888015f0e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 44.833975] >ffff888015f0e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.834823] ^ [ 44.835595] ffff888015f0e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 44.836461] ffff888015f0ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.837318] ================================================================== [ 44.838419] Disabling lock debugging due to kernel taint [ 47.002792] BUG: Bad rss-counter state mm:00000000d7578a98 type:MM_FILEPAGES val:33 [ 47.003544] BUG: Bad rss-counter state mm:00000000d7578a98 type:MM_ANONPAGES val:22 [ 47.438888] BUG: Bad rss-counter state mm:00000000df117c68 type:MM_FILEPAGES val:33 [ 47.440145] BUG: Bad rss-counter state mm:00000000df117c68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21689' (ECDSA) to the list of known hosts. 2023/06/20 05:47:39 fuzzer started 2023/06/20 05:47:39 dialing manager at localhost:44161 2023/06/20 05:47:39 checking machine... 2023/06/20 05:47:39 checking revisions... [ 48.047862] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:47:39 testing simple program... [ 48.074665] cgroup: Unknown subsys name 'net' [ 48.120044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:47:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888019c77c18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000008 R13=000000000000001f R14=0000000000000001 R15=ffff888019c77ca8 RIP=ffffffff8450bdc0 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 00007fb2ac4cb900 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=00007fb2aca82618 CR3=00000000145ae000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007f3064adc700 CR3=000000000f866000 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=1b595acdb8f5e4810d4f235c02da42b9 XMM02=2c67c8bc2e329bc3000000000011cf80 XMM03=fb795ef6d65770560000000000123920 XMM04=3bd8a8587c1f93c100000000000ae988 XMM05=c48f20ba7d2a78ad00000000001356d8 XMM06=4fda316b135da52b0000000000134408 XMM07=e042d86d42eb936e0000000000123ba0 XMM08=99f3d200efdc4fb2000000000011cfe0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000