syzkaller login: [ 30.479344] BUG: Bad rss-counter state mm:000000007c794fbf type:MM_FILEPAGES val:33 [ 30.480313] BUG: Bad rss-counter state mm:000000007c794fbf type:MM_ANONPAGES val:22 [ 30.645489] ================================================================== [ 30.646585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.647694] Read of size 8 at addr ffff88800e841310 by task sshd/220 [ 30.648712] [ 30.648931] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.649805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.650798] Call Trace: [ 30.651114] [ 30.651400] dump_stack_lvl+0x91/0xf0 [ 30.651888] print_report+0xcc/0x620 [ 30.652365] ? __virt_addr_valid+0x102/0x340 [ 30.652920] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.653546] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.654159] kasan_report+0xbe/0xf0 [ 30.654638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.655261] vma_interval_tree_remove+0xc75/0xec0 [ 30.655864] vma_prepare+0xc54/0x11a0 [ 30.656346] __split_vma+0x5af/0x950 [ 30.656821] ? __pfx___split_vma+0x10/0x10 [ 30.657376] ? find_held_lock+0x2c/0x110 [ 30.657903] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.658481] ? lock_is_held_type+0x9f/0x120 [ 30.659032] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.659669] ? mtree_range_walk+0x632/0x900 [ 30.660234] ? mas_walk+0x5c7/0x7c0 [ 30.660709] do_vmi_munmap+0x1f1/0x2b0 [ 30.661213] mmap_region+0x1f9/0x2660 [ 30.661697] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.662212] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.662924] ? __pfx_lock_acquire+0x10/0x10 [ 30.663467] ? __pfx_mmap_region+0x10/0x10 [ 30.664015] ? security_mmap_addr+0x7d/0xa0 [ 30.664627] ? get_unmapped_area+0x1f5/0x3f0 [ 30.665271] do_mmap+0x854/0xf00 [ 30.665765] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.666327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.666952] ksys_mmap_pgoff+0x3af/0x500 [ 30.667535] do_syscall_64+0x3f/0x90 [ 30.668092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.668827] RIP: 0033:0x7fc49b287d82 [ 30.669377] 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 [ 30.671901] RSP: 002b:00007ffd1b9658c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.672947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc49b287d82 [ 30.673935] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc49a6c1000 [ 30.674926] RBP: 00007fc49a6c1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.675912] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a94099bd90 [ 30.676898] R13: 00007ffd1b9658e0 R14: 00007ffd1b965910 R15: 00007ffd1b965c70 [ 30.677887] [ 30.678215] [ 30.678454] Allocated by task 213: [ 30.678950] kasan_save_stack+0x22/0x50 [ 30.679531] kasan_set_track+0x25/0x30 [ 30.680098] __kasan_slab_alloc+0x59/0x70 [ 30.680698] kmem_cache_alloc+0x16b/0x370 [ 30.681302] vm_area_dup+0x20/0x160 [ 30.681827] __split_vma+0x170/0x950 [ 30.682363] split_vma+0xc6/0x110 [ 30.682867] mprotect_fixup+0x8d2/0xb30 [ 30.683450] do_mprotect_pkey+0x87e/0xd40 [ 30.684031] __x64_sys_mprotect+0x78/0xc0 [ 30.684622] do_syscall_64+0x3f/0x90 [ 30.685169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685898] [ 30.686137] Freed by task 213: [ 30.686584] kasan_save_stack+0x22/0x50 [ 30.687147] kasan_set_track+0x25/0x30 [ 30.687712] kasan_save_free_info+0x2b/0x50 [ 30.688316] __kasan_slab_free+0x10a/0x190 [ 30.688919] kmem_cache_free+0x10d/0x4d0 [ 30.689492] rcu_core+0x8c8/0x2860 [ 30.689985] __do_softirq+0x1b7/0x7d4 [ 30.690531] [ 30.690773] Last potentially related work creation: [ 30.691448] kasan_save_stack+0x22/0x50 [ 30.692006] __kasan_record_aux_stack+0x8e/0xa0 [ 30.692671] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.693416] remove_vma+0x139/0x170 [ 30.693931] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.694578] do_vmi_munmap+0x1f1/0x2b0 [ 30.695118] __vm_munmap+0x138/0x3a0 [ 30.695658] __x64_sys_munmap+0x59/0x80 [ 30.696209] do_syscall_64+0x3f/0x90 [ 30.696734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697492] [ 30.697735] Second to last potentially related work creation: [ 30.698522] kasan_save_stack+0x22/0x50 [ 30.699089] __kasan_record_aux_stack+0x8e/0xa0 [ 30.699728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.700462] remove_vma+0x139/0x170 [ 30.700982] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.701618] do_vmi_munmap+0x1f1/0x2b0 [ 30.702160] mmap_region+0x1f9/0x2660 [ 30.702695] do_mmap+0x854/0xf00 [ 30.703186] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.703745] ksys_mmap_pgoff+0x3af/0x500 [ 30.704316] do_syscall_64+0x3f/0x90 [ 30.704866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.705610] [ 30.705850] The buggy address belongs to the object at ffff88800e8412b8 [ 30.705850] which belongs to the cache vm_area_struct of size 168 [ 30.707551] The buggy address is located 88 bytes inside of [ 30.707551] freed 168-byte region [ffff88800e8412b8, ffff88800e841360) [ 30.708993] [ 30.709224] The buggy address belongs to the physical page: [ 30.709882] page:000000009d393848 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe841 [ 30.710972] memcg:ffff88800ef40a01 [ 30.711396] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.712100] page_type: 0xffffffff() [ 30.712555] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.713489] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef40a01 [ 30.714402] page dumped because: kasan: bad access detected [ 30.715078] [ 30.715294] Memory state around the buggy address: [ 30.715899] ffff88800e841200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.716777] ffff88800e841280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.717652] >ffff88800e841300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.718527] ^ [ 30.719006] ffff88800e841380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.719894] ffff88800e841400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.720757] ================================================================== [ 30.722037] Disabling lock debugging due to kernel taint [ 32.747381] BUG: Bad rss-counter state mm:0000000000732df6 type:MM_FILEPAGES val:33 [ 32.748373] BUG: Bad rss-counter state mm:0000000000732df6 type:MM_ANONPAGES val:22 [ 33.236467] BUG: Bad rss-counter state mm:00000000ea3e9850 type:MM_FILEPAGES val:33 [ 33.237881] BUG: Bad rss-counter state mm:00000000ea3e9850 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28209' (ECDSA) to the list of known hosts. 2023/06/21 05:08:10 fuzzer started 2023/06/21 05:08:11 dialing manager at localhost:36067 2023/06/21 05:08:11 checking machine... 2023/06/21 05:08:11 checking revisions... [ 33.939593] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:08:11 testing simple program... [ 33.979595] cgroup: Unknown subsys name 'net' [ 34.019031] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:08:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=ffff888010241b40 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110028e6efc RSP=ffff8880147377c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffffff8560b640 R13=ffffffff81efd00b R14=0000000000000067 R15=ffff888014737910 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f2949b70900 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=00005572a6e33818 CR3=000000000c7c6000 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=01bb4303b352dd1100000000000ae988 XMM05=02441aa43886a86f0000000000133e90 XMM06=4fda316b135da52b0000000000132f30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00200000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc4142f8c8 CR3=0000000005482000 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=00007f899696b510000055eb756d2790 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