Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.551411] BUG: Bad rss-counter state mm:00000000e517a9fd type:MM_FILEPAGES val:33 [ 31.553413] BUG: Bad rss-counter state mm:00000000e517a9fd type:MM_ANONPAGES val:22 [ 31.726978] ================================================================== [ 31.728097] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.729182] Read of size 8 at addr ffff88800efa5b38 by task sshd/219 [ 31.729973] [ 31.730192] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.731058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.732037] Call Trace: [ 31.732362] [ 31.732651] dump_stack_lvl+0x91/0xf0 [ 31.733142] print_report+0xcc/0x620 [ 31.733628] ? __virt_addr_valid+0x102/0x340 [ 31.734174] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.734795] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.735420] kasan_report+0xbe/0xf0 [ 31.735895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.736531] vma_interval_tree_remove+0xc75/0xec0 [ 31.737152] vma_prepare+0xc54/0x11a0 [ 31.737647] __split_vma+0x5af/0x950 [ 31.738129] ? __pfx___split_vma+0x10/0x10 [ 31.738670] ? find_held_lock+0x2c/0x110 [ 31.739200] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.739796] ? lock_is_held_type+0x9f/0x120 [ 31.740349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.740969] ? mtree_range_walk+0x632/0x900 [ 31.741532] ? mas_walk+0x5c7/0x7c0 [ 31.742012] do_vmi_munmap+0x1f1/0x2b0 [ 31.742505] mmap_region+0x1f9/0x2660 [ 31.742997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.743527] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.744246] ? __pfx_lock_acquire+0x10/0x10 [ 31.744776] ? __pfx_mmap_region+0x10/0x10 [ 31.745308] ? security_mmap_addr+0x7d/0xa0 [ 31.745863] ? get_unmapped_area+0x1f5/0x3f0 [ 31.746491] do_mmap+0x854/0xf00 [ 31.746994] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.747585] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.748218] ksys_mmap_pgoff+0x3af/0x500 [ 31.748792] do_syscall_64+0x3f/0x90 [ 31.749346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750084] RIP: 0033:0x7f6654817d82 [ 31.750620] 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 [ 31.753052] RSP: 002b:00007fff19adfba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.754058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6654817d82 [ 31.755006] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6653c51000 [ 31.755958] RBP: 00007f6653c51000 R08: 0000000000000009 R09: 0000000000001000 [ 31.756905] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b4e144b20 [ 31.757859] R13: 00007fff19adfbc0 R14: 00007fff19adfbf0 R15: 00007fff19adff50 [ 31.758812] [ 31.759144] [ 31.759401] Allocated by task 212: [ 31.759880] kasan_save_stack+0x22/0x50 [ 31.760440] kasan_set_track+0x25/0x30 [ 31.760994] __kasan_slab_alloc+0x59/0x70 [ 31.761585] kmem_cache_alloc+0x16b/0x370 [ 31.762166] vm_area_dup+0x20/0x160 [ 31.762670] __split_vma+0x170/0x950 [ 31.763187] split_vma+0xc6/0x110 [ 31.763693] mprotect_fixup+0x8d2/0xb30 [ 31.764275] do_mprotect_pkey+0x87e/0xd40 [ 31.764859] __x64_sys_mprotect+0x78/0xc0 [ 31.765464] do_syscall_64+0x3f/0x90 [ 31.766006] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.766750] [ 31.766999] Freed by task 212: [ 31.767473] kasan_save_stack+0x22/0x50 [ 31.768052] kasan_set_track+0x25/0x30 [ 31.768623] kasan_save_free_info+0x2b/0x50 [ 31.769243] __kasan_slab_free+0x10a/0x190 [ 31.769858] kmem_cache_free+0x10d/0x4d0 [ 31.770445] rcu_core+0x8c8/0x2860 [ 31.770962] __do_softirq+0x1b7/0x7d4 [ 31.771527] [ 31.771781] Last potentially related work creation: [ 31.772457] kasan_save_stack+0x22/0x50 [ 31.773035] __kasan_record_aux_stack+0x8e/0xa0 [ 31.773694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.774434] remove_vma+0x139/0x170 [ 31.774956] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.775612] do_vmi_munmap+0x1f1/0x2b0 [ 31.776168] __vm_munmap+0x138/0x3a0 [ 31.776707] __x64_sys_munmap+0x59/0x80 [ 31.777274] do_syscall_64+0x3f/0x90 [ 31.777824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.778563] [ 31.778811] Second to last potentially related work creation: [ 31.779610] kasan_save_stack+0x22/0x50 [ 31.780185] __kasan_record_aux_stack+0x8e/0xa0 [ 31.780845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.781582] remove_vma+0x139/0x170 [ 31.782099] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.782741] do_vmi_munmap+0x1f1/0x2b0 [ 31.783313] mmap_region+0x1f9/0x2660 [ 31.783859] do_mmap+0x854/0xf00 [ 31.784362] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.784915] ksys_mmap_pgoff+0x3af/0x500 [ 31.785503] do_syscall_64+0x3f/0x90 [ 31.786045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.786786] [ 31.787031] The buggy address belongs to the object at ffff88800efa5ae0 [ 31.787031] which belongs to the cache vm_area_struct of size 168 [ 31.788754] The buggy address is located 88 bytes inside of [ 31.788754] freed 168-byte region [ffff88800efa5ae0, ffff88800efa5b88) [ 31.790367] [ 31.790619] The buggy address belongs to the physical page: [ 31.791388] page:00000000fda4120a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefa5 [ 31.792650] memcg:ffff88800da91d01 [ 31.793144] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.793958] page_type: 0xffffffff() [ 31.794471] raw: 0100000000000200 ffff8880087a0c80 ffffea0000268440 dead000000000003 [ 31.795538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da91d01 [ 31.796594] page dumped because: kasan: bad access detected [ 31.797359] [ 31.797608] Memory state around the buggy address: [ 31.798267] ffff88800efa5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.799275] ffff88800efa5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.800319] >ffff88800efa5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.801300] ^ [ 31.802004] ffff88800efa5b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.802990] ffff88800efa5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.803965] ================================================================== [ 31.805395] Disabling lock debugging due to kernel taint [ 33.866822] BUG: Bad rss-counter state mm:000000007afa0ed8 type:MM_FILEPAGES val:33 [ 33.867863] BUG: Bad rss-counter state mm:000000007afa0ed8 type:MM_ANONPAGES val:22 [ 34.360213] BUG: Bad rss-counter state mm:000000005a29a293 type:MM_FILEPAGES val:33 [ 34.361267] BUG: Bad rss-counter state mm:000000005a29a293 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27246' (ECDSA) to the list of known hosts. 2023/06/20 11:09:45 fuzzer started 2023/06/20 11:09:45 dialing manager at localhost:36067 2023/06/20 11:09:45 checking machine... 2023/06/20 11:09:45 checking revisions... [ 35.128369] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:09:45 testing simple program... [ 35.183922] cgroup: Unknown subsys name 'net' [ 35.222889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:09:45 Registers: info registers vcpu 0 RAX=ffffffff8614c752 RBX=0000000000000001 RCX=ffffffff818cc02e RDX=0000000000000000 RSI=ffffffff8614c752 RDI=ffffffff85e0b0a0 RBP=ffffffff85e0b0a4 RSP=ffff88806ce099f8 R8 =ffffffff8614c752 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000241b7 R12=ffffffff85e0b0a0 R13=ffffffff85e0b0a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 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 00007f76e5153900 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=00007f1deed939c0 CR3=00000000096e4000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffffffff85652c08 RCX=0000000080000001 RDX=1ffffffff0aca581 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801a13f290 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000286 RIP=ffffffff814c0871 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 00007f76e5153900 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=00007ffd0a66e9f8 CR3=00000000096e4000 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=00007f82f70cc5100000562c96381790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000