syzkaller login: [ 30.551739] BUG: Bad rss-counter state mm:00000000b4d3d96d type:MM_FILEPAGES val:33 [ 30.552750] BUG: Bad rss-counter state mm:00000000b4d3d96d type:MM_ANONPAGES val:22 [ 30.726892] ================================================================== [ 30.727777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.728689] Read of size 8 at addr ffff88800edbd5c8 by task sshd/221 [ 30.729431] [ 30.729645] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.730648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.731598] Call Trace: [ 30.731911] [ 30.732190] dump_stack_lvl+0x91/0xf0 [ 30.732694] print_report+0xcc/0x620 [ 30.733162] ? __virt_addr_valid+0x102/0x340 [ 30.733695] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734294] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734892] kasan_report+0xbe/0xf0 [ 30.735359] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735969] vma_interval_tree_remove+0xc75/0xec0 [ 30.736559] vma_prepare+0xc54/0x11a0 [ 30.737025] __split_vma+0x5af/0x950 [ 30.737484] ? __pfx___split_vma+0x10/0x10 [ 30.738004] ? find_held_lock+0x2c/0x110 [ 30.738516] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.739066] ? lock_is_held_type+0x9f/0x120 [ 30.739612] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.740201] ? mtree_range_walk+0x632/0x900 [ 30.740741] ? mas_walk+0x5c7/0x7c0 [ 30.741209] do_vmi_munmap+0x1f1/0x2b0 [ 30.741697] mmap_region+0x1f9/0x2660 [ 30.742171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.742670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.743360] ? __pfx_lock_acquire+0x10/0x10 [ 30.743885] ? __pfx_mmap_region+0x10/0x10 [ 30.744402] ? security_mmap_addr+0x7d/0xa0 [ 30.744918] ? get_unmapped_area+0x1f5/0x3f0 [ 30.745459] do_mmap+0x854/0xf00 [ 30.745892] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.746378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746928] ksys_mmap_pgoff+0x3af/0x500 [ 30.747426] do_syscall_64+0x3f/0x90 [ 30.747916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748553] RIP: 0033:0x7f5c43b1cd82 [ 30.749001] 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 [ 30.751074] RSP: 002b:00007ffc20038b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.751996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c43b1cd82 [ 30.752827] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c42f56000 [ 30.753661] RBP: 00007f5c42f56000 R08: 0000000000000009 R09: 0000000000001000 [ 30.754485] R10: 0000000000000812 R11: 0000000000000206 R12: 000055955b1fdec0 [ 30.755306] R13: 00007ffc20038b20 R14: 00007ffc20038b50 R15: 00007ffc20038eb0 [ 30.756284] [ 30.756583] [ 30.756798] Allocated by task 214: [ 30.757231] kasan_save_stack+0x22/0x50 [ 30.757741] kasan_set_track+0x25/0x30 [ 30.758242] __kasan_slab_alloc+0x59/0x70 [ 30.758767] kmem_cache_alloc+0x16b/0x370 [ 30.759280] vm_area_dup+0x20/0x160 [ 30.759749] __split_vma+0x170/0x950 [ 30.760213] split_vma+0xc6/0x110 [ 30.760650] mprotect_fixup+0x8d2/0xb30 [ 30.761148] do_mprotect_pkey+0x87e/0xd40 [ 30.761668] __x64_sys_mprotect+0x78/0xc0 [ 30.762191] do_syscall_64+0x3f/0x90 [ 30.762668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763306] [ 30.763528] Freed by task 204: [ 30.763923] kasan_save_stack+0x22/0x50 [ 30.764424] kasan_set_track+0x25/0x30 [ 30.764923] kasan_save_free_info+0x2b/0x50 [ 30.765455] __kasan_slab_free+0x10a/0x190 [ 30.765992] kmem_cache_free+0x10d/0x4d0 [ 30.766502] rcu_core+0x8c8/0x2860 [ 30.766951] __do_softirq+0x1b7/0x7d4 [ 30.767428] [ 30.767664] Last potentially related work creation: [ 30.768248] kasan_save_stack+0x22/0x50 [ 30.768750] __kasan_record_aux_stack+0x8e/0xa0 [ 30.769333] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.769976] remove_vma+0x139/0x170 [ 30.770430] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.770994] do_vmi_munmap+0x1f1/0x2b0 [ 30.771490] __vm_munmap+0x138/0x3a0 [ 30.771958] __x64_sys_munmap+0x59/0x80 [ 30.772463] do_syscall_64+0x3f/0x90 [ 30.772936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773584] [ 30.773799] The buggy address belongs to the object at ffff88800edbd570 [ 30.773799] which belongs to the cache vm_area_struct of size 168 [ 30.775274] The buggy address is located 88 bytes inside of [ 30.775274] freed 168-byte region [ffff88800edbd570, ffff88800edbd618) [ 30.776690] [ 30.776905] The buggy address belongs to the physical page: [ 30.777569] page:000000008d467e1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedbd [ 30.778648] memcg:ffff888013f9ba01 [ 30.779073] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.779775] page_type: 0xffffffff() [ 30.780224] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a7b00 dead000000000003 [ 30.781135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f9ba01 [ 30.782039] page dumped because: kasan: bad access detected [ 30.782698] [ 30.782917] Memory state around the buggy address: [ 30.783502] ffff88800edbd480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.784427] ffff88800edbd500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.785326] >ffff88800edbd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.786209] ^ [ 30.786908] ffff88800edbd600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.787826] ffff88800edbd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.788710] ================================================================== [ 30.789809] Disabling lock debugging due to kernel taint [ 32.801640] BUG: Bad rss-counter state mm:00000000ef467efd type:MM_FILEPAGES val:33 [ 32.802815] BUG: Bad rss-counter state mm:00000000ef467efd type:MM_ANONPAGES val:22 [ 33.205072] BUG: Bad rss-counter state mm:00000000ef036b71 type:MM_FILEPAGES val:33 [ 33.206077] BUG: Bad rss-counter state mm:00000000ef036b71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3545' (ECDSA) to the list of known hosts. 2023/06/20 13:32:16 fuzzer started 2023/06/20 13:32:16 dialing manager at localhost:36067 2023/06/20 13:32:16 checking machine... 2023/06/20 13:32:16 checking revisions... [ 33.923688] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:32:17 testing simple program... [ 33.974341] cgroup: Unknown subsys name 'net' [ 34.025276] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:16 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81ec6a59 RDX=000000000000ec6a RSI=000000000000ec6a RDI=ffffffff86524b98 RBP=ffff88800c5a7a20 RSP=ffff88800c5a7958 R8 =0000000000000000 R9 =ffff88800c5a7a08 R10=0000000000038001 R11=0000000000037e30 R12=ffff88800c5a7a28 R13=ffff88800c5a7a10 R14=ffff88800c5a7a09 R15=ffff88800c5a79c8 RIP=ffffffff811307c2 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 00007f586c757900 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=00007f586c70b01c CR3=000000000e1fa000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=0000000000000000 RBX=0000000000000001 RCX=ffffffff81935ac3 RDX=ffff8880102a3680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880160f6fa8 RSP=ffff8880147779b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=ffff88800ffde000 R14=ffff888014777a58 R15=ffff8880160f6fa8 RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd2e7762900 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=00007fd2e6b78ab0 CR3=000000000d816000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f43cd915620517a900000000000ae988 XMM05=882cd516c802f1930000000000133f38 XMM06=6f34ba8758ec72580000000000132cd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000