syzkaller login: [ 28.801966] BUG: Bad rss-counter state mm:0000000037a0fac1 type:MM_FILEPAGES val:33 [ 28.803052] BUG: Bad rss-counter state mm:0000000037a0fac1 type:MM_ANONPAGES val:22 [ 28.976362] ================================================================== [ 28.977390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.978391] Read of size 8 at addr ffff8880097696b0 by task sshd/221 [ 28.979380] [ 28.979617] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.980537] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.981589] Call Trace: [ 28.981930] [ 28.982230] dump_stack_lvl+0x91/0xf0 [ 28.982757] print_report+0xcc/0x620 [ 28.983271] ? __virt_addr_valid+0x102/0x340 [ 28.983881] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.984537] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.985200] kasan_report+0xbe/0xf0 [ 28.985704] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.986367] vma_interval_tree_remove+0xc75/0xec0 [ 28.987012] vma_prepare+0xc54/0x11a0 [ 28.987525] __split_vma+0x5af/0x950 [ 28.988030] ? __pfx___split_vma+0x10/0x10 [ 28.988593] ? find_held_lock+0x2c/0x110 [ 28.989148] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.989745] ? lock_is_held_type+0x9f/0x120 [ 28.990315] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.990959] ? mtree_range_walk+0x632/0x900 [ 28.991548] ? mas_walk+0x5c7/0x7c0 [ 28.992067] do_vmi_munmap+0x1f1/0x2b0 [ 28.992598] mmap_region+0x1f9/0x2660 [ 28.993117] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.993660] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.994417] ? __pfx_lock_acquire+0x10/0x10 [ 28.994979] ? __pfx_mmap_region+0x10/0x10 [ 28.995543] ? security_mmap_addr+0x7d/0xa0 [ 28.996130] ? get_unmapped_area+0x1f5/0x3f0 [ 28.996721] do_mmap+0x854/0xf00 [ 28.997186] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.997709] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.998307] ksys_mmap_pgoff+0x3af/0x500 [ 28.998844] do_syscall_64+0x3f/0x90 [ 28.999354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.000051] RIP: 0033:0x7f265a450d82 [ 29.000531] 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 [ 29.002779] RSP: 002b:00007ffdbde2ec48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.003745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f265a450d82 [ 29.004667] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f265988a000 [ 29.005565] RBP: 00007f265988a000 R08: 0000000000000009 R09: 0000000000001000 [ 29.006472] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bd7ecdb20 [ 29.007383] R13: 00007ffdbde2ec60 R14: 00007ffdbde2ec90 R15: 00007ffdbde2eff0 [ 29.008320] [ 29.008634] [ 29.008863] Allocated by task 213: [ 29.009341] kasan_save_stack+0x22/0x50 [ 29.009896] kasan_set_track+0x25/0x30 [ 29.010443] __kasan_slab_alloc+0x59/0x70 [ 29.011034] kmem_cache_alloc+0x16b/0x370 [ 29.011604] vm_area_dup+0x20/0x160 [ 29.012123] __split_vma+0x170/0x950 [ 29.012639] split_vma+0xc6/0x110 [ 29.013119] mprotect_fixup+0x8d2/0xb30 [ 29.013672] do_mprotect_pkey+0x87e/0xd40 [ 29.014247] __x64_sys_mprotect+0x78/0xc0 [ 29.014824] do_syscall_64+0x3f/0x90 [ 29.015355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.016086] [ 29.016323] Freed by task 211: [ 29.016761] kasan_save_stack+0x22/0x50 [ 29.017307] kasan_set_track+0x25/0x30 [ 29.017830] kasan_save_free_info+0x2b/0x50 [ 29.018403] __kasan_slab_free+0x10a/0x190 [ 29.018972] kmem_cache_free+0x10d/0x4d0 [ 29.019511] rcu_core+0x8c8/0x2860 [ 29.020055] __do_softirq+0x1b7/0x7d4 [ 29.020561] [ 29.020793] Last potentially related work creation: [ 29.021418] kasan_save_stack+0x22/0x50 [ 29.021959] __kasan_record_aux_stack+0x8e/0xa0 [ 29.022570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.023266] remove_vma+0x139/0x170 [ 29.023742] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.024364] do_vmi_munmap+0x1f1/0x2b0 [ 29.024881] __vm_munmap+0x138/0x3a0 [ 29.025400] __x64_sys_munmap+0x59/0x80 [ 29.025949] do_syscall_64+0x3f/0x90 [ 29.026481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.027192] [ 29.027423] Second to last potentially related work creation: [ 29.028160] kasan_save_stack+0x22/0x50 [ 29.028698] __kasan_record_aux_stack+0x8e/0xa0 [ 29.029313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.029999] remove_vma+0x139/0x170 [ 29.030488] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.031085] do_vmi_munmap+0x1f1/0x2b0 [ 29.031617] mmap_region+0x1f9/0x2660 [ 29.032144] do_mmap+0x854/0xf00 [ 29.032611] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.033133] ksys_mmap_pgoff+0x3af/0x500 [ 29.033680] do_syscall_64+0x3f/0x90 [ 29.034194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.034884] [ 29.035117] The buggy address belongs to the object at ffff888009769658 [ 29.035117] which belongs to the cache vm_area_struct of size 168 [ 29.036721] The buggy address is located 88 bytes inside of [ 29.036721] freed 168-byte region [ffff888009769658, ffff888009769700) [ 29.038244] [ 29.038482] The buggy address belongs to the physical page: [ 29.039188] page:0000000073d51fe6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9769 [ 29.040359] memcg:ffff88800d637801 [ 29.040822] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.041568] page_type: 0xffffffff() [ 29.042052] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 29.043039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d637801 [ 29.044032] page dumped because: kasan: bad access detected [ 29.044739] [ 29.044971] Memory state around the buggy address: [ 29.045599] ffff888009769580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.046517] ffff888009769600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.047433] >ffff888009769680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.048344] ^ [ 29.048972] ffff888009769700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 29.049894] ffff888009769780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.050816] ================================================================== [ 29.052019] Disabling lock debugging due to kernel taint [ 31.299958] BUG: Bad rss-counter state mm:0000000078ef9326 type:MM_FILEPAGES val:33 [ 31.300972] BUG: Bad rss-counter state mm:0000000078ef9326 type:MM_ANONPAGES val:22 [ 31.776612] BUG: Bad rss-counter state mm:00000000917a4d6c type:MM_FILEPAGES val:33 [ 31.777510] BUG: Bad rss-counter state mm:00000000917a4d6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14118' (ECDSA) to the list of known hosts. 2023/06/20 19:27:44 fuzzer started 2023/06/20 19:27:44 dialing manager at localhost:36067 2023/06/20 19:27:44 checking machine... 2023/06/20 19:27:44 checking revisions... [ 32.488879] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:27:45 testing simple program... [ 32.528327] cgroup: Unknown subsys name 'net' [ 32.569922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:27:44 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff864b6d1e RDX=0000000000000008 RSI=ffff888008d9fec0 RDI=ffff888008d9f978 RBP=ffff888008d9f9d0 RSP=ffff888008d9f900 R8 =ffffffff864b6d22 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fec8 R15=ffff888008d9f978 RIP=ffffffff811303f0 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=00007f5463194000 CR3=000000000d61e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d753280b15637a3100000000000ae988 XMM05=aa0ce44880e82e1c0000000000133e30 XMM06=249b789bedbfa1320000000000132bd0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000030 RCX=ffffffff844a504f RDX=ffff8880159a8000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800eb32408 RSP=ffff888016c47ce0 R8 =0000000000000000 R9 =0000000000000006 R10=0000000000000008 R11=0000000000000000 R12=0000000000000006 R13=0000000000000008 R14=00007ffc1114c000 R15=00007f6b3e9fbfff RIP=ffffffff814c086b RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6b3df05900 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=00007ffc1114c000 CR3=0000000016110000 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=0b730228c58f8351791cef98bbf08e04 XMM03=f47b025dcfe0a5792d27933259303b7f XMM04=2a74ee73db3496b3ab1a194bc4bcba30 XMM05=000000000000000000000000000000ff XMM06=2a74025dcf3496792d1a193259303b30 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000