syzkaller login: [ 28.760344] BUG: Bad rss-counter state mm:000000003380cd7e type:MM_FILEPAGES val:33 [ 28.761381] BUG: Bad rss-counter state mm:000000003380cd7e type:MM_ANONPAGES val:22 [ 28.937268] ================================================================== [ 28.938488] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.939915] Read of size 8 at addr ffff8880098a3c20 by task sshd/221 [ 28.940941] [ 28.941232] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.942387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.943662] Call Trace: [ 28.943992] [ 28.944292] dump_stack_lvl+0x91/0xf0 [ 28.944804] print_report+0xcc/0x620 [ 28.945307] ? __virt_addr_valid+0x102/0x340 [ 28.945877] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.946522] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.947172] kasan_report+0xbe/0xf0 [ 28.947682] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.948333] vma_interval_tree_remove+0xc75/0xec0 [ 28.948954] vma_prepare+0xc54/0x11a0 [ 28.949459] __split_vma+0x5af/0x950 [ 28.949951] ? __pfx___split_vma+0x10/0x10 [ 28.950509] ? find_held_lock+0x2c/0x110 [ 28.951056] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.951651] ? lock_is_held_type+0x9f/0x120 [ 28.952214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.952848] ? mtree_range_walk+0x632/0x900 [ 28.953424] ? mas_walk+0x5c7/0x7c0 [ 28.953927] do_vmi_munmap+0x1f1/0x2b0 [ 28.954442] mmap_region+0x1f9/0x2660 [ 28.954955] ? __pfx_mmap_region+0x10/0x10 [ 28.955520] ? security_mmap_addr+0x7d/0xa0 [ 28.956082] ? get_unmapped_area+0x1f5/0x3f0 [ 28.956713] do_mmap+0x854/0xf00 [ 28.957230] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.957747] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.958327] ksys_mmap_pgoff+0x3af/0x500 [ 28.958847] do_syscall_64+0x3f/0x90 [ 28.959373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.960044] RIP: 0033:0x7fa386c6cd82 [ 28.960509] 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 [ 28.962678] RSP: 002b:00007ffd65a496e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.963623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa386c6cd82 [ 28.964488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3860a6000 [ 28.965359] RBP: 00007fa3860a6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.966237] R10: 0000000000000812 R11: 0000000000000206 R12: 000056458f751f70 [ 28.967122] R13: 00007ffd65a49700 R14: 00007ffd65a49730 R15: 00007ffd65a49a90 [ 28.968009] [ 28.968308] [ 28.968532] Allocated by task 213: [ 28.968962] kasan_save_stack+0x22/0x50 [ 28.969476] kasan_set_track+0x25/0x30 [ 28.969975] __kasan_slab_alloc+0x59/0x70 [ 28.970501] kmem_cache_alloc+0x16b/0x370 [ 28.971036] vm_area_dup+0x20/0x160 [ 28.971507] __split_vma+0x170/0x950 [ 28.971985] split_vma+0xc6/0x110 [ 28.972427] mprotect_fixup+0x8d2/0xb30 [ 28.972939] do_mprotect_pkey+0x87e/0xd40 [ 28.973462] __x64_sys_mprotect+0x78/0xc0 [ 28.973996] do_syscall_64+0x3f/0x90 [ 28.974474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.975128] [ 28.975363] Freed by task 213: [ 28.975759] kasan_save_stack+0x22/0x50 [ 28.976270] kasan_set_track+0x25/0x30 [ 28.976772] kasan_save_free_info+0x2b/0x50 [ 28.977306] __kasan_slab_free+0x10a/0x190 [ 28.977842] kmem_cache_free+0x10d/0x4d0 [ 28.978355] rcu_core+0x8c8/0x2860 [ 28.978802] __do_softirq+0x1b7/0x7d4 [ 28.979296] [ 28.979520] Last potentially related work creation: [ 28.980202] kasan_save_stack+0x22/0x50 [ 28.980862] __kasan_record_aux_stack+0x8e/0xa0 [ 28.981530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.982282] remove_vma+0x139/0x170 [ 28.982808] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.983476] do_vmi_munmap+0x1f1/0x2b0 [ 28.984047] __vm_munmap+0x138/0x3a0 [ 28.984592] __x64_sys_munmap+0x59/0x80 [ 28.985173] do_syscall_64+0x3f/0x90 [ 28.985724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.986479] [ 28.986733] The buggy address belongs to the object at ffff8880098a3bc8 [ 28.986733] which belongs to the cache vm_area_struct of size 168 [ 28.988486] The buggy address is located 88 bytes inside of [ 28.988486] freed 168-byte region [ffff8880098a3bc8, ffff8880098a3c70) [ 28.990146] [ 28.990396] The buggy address belongs to the physical page: [ 28.991169] page:0000000042c42f7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98a3 [ 28.992461] memcg:ffff8880095a0101 [ 28.992964] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.993715] page_type: 0xffffffff() [ 28.994247] raw: 0100000000000200 ffff8880087a0c80 ffffea0000391c00 dead000000000004 [ 28.995342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095a0101 [ 28.996401] page dumped because: kasan: bad access detected [ 28.997174] [ 28.997427] Memory state around the buggy address: [ 28.998108] ffff8880098a3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.999112] ffff8880098a3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.000122] >ffff8880098a3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.001123] ^ [ 29.001732] ffff8880098a3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.002722] ffff8880098a3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.003739] ================================================================== [ 29.004896] Disabling lock debugging due to kernel taint [ 31.004715] BUG: Bad rss-counter state mm:000000002d7edaae type:MM_FILEPAGES val:33 [ 31.006621] BUG: Bad rss-counter state mm:000000002d7edaae type:MM_ANONPAGES val:22 [ 31.473958] BUG: Bad rss-counter state mm:00000000a892c95f type:MM_FILEPAGES val:33 [ 31.475592] BUG: Bad rss-counter state mm:00000000a892c95f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8172' (ECDSA) to the list of known hosts. 2023/06/21 10:32:08 fuzzer started 2023/06/21 10:32:09 dialing manager at localhost:36067 2023/06/21 10:32:09 checking machine... 2023/06/21 10:32:09 checking revisions... [ 32.181353] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:32:09 testing simple program... [ 32.230882] cgroup: Unknown subsys name 'net' [ 32.288572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:32:08 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9fa01 RSI=ffff888008d9fa18 RDI=ffff888008d9fa18 RBP=ffff888008d9f9d0 RSP=ffff888008d9f8b0 R8 =ffffffff8608a55a R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fa20 R15=ffff888008d9f978 RIP=ffffffff8112fbf3 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 =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=00007fab105eab80 CR3=000000000b356000 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=4ef27ebfb90e5c0500000000000ae988 XMM05=18f05efcfb36c29e0000000000133150 XMM06=c291bd5c70af25b90000000000131f40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c04400 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=00007fab52c0c618 CR3=0000000009072000 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=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