syzkaller login: [ 30.540080] BUG: Bad rss-counter state mm:000000004122d9ef type:MM_FILEPAGES val:33 [ 30.541106] BUG: Bad rss-counter state mm:000000004122d9ef type:MM_ANONPAGES val:22 [ 30.710029] ================================================================== [ 30.710926] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.711842] Read of size 8 at addr ffff8880183d2228 by task sshd/220 [ 30.712714] [ 30.712976] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.713825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.714790] Call Trace: [ 30.715115] [ 30.715397] dump_stack_lvl+0x91/0xf0 [ 30.715887] print_report+0xcc/0x620 [ 30.716367] ? __virt_addr_valid+0x102/0x340 [ 30.716938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717556] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718167] kasan_report+0xbe/0xf0 [ 30.718663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.719283] vma_interval_tree_remove+0xc75/0xec0 [ 30.719887] vma_prepare+0xc54/0x11a0 [ 30.720363] __split_vma+0x5af/0x950 [ 30.720842] ? __pfx___split_vma+0x10/0x10 [ 30.721361] ? find_held_lock+0x2c/0x110 [ 30.721880] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.722437] ? lock_is_held_type+0x9f/0x120 [ 30.722973] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.723580] ? mtree_range_walk+0x632/0x900 [ 30.724131] ? mas_walk+0x5c7/0x7c0 [ 30.724618] do_vmi_munmap+0x1f1/0x2b0 [ 30.725100] mmap_region+0x1f9/0x2660 [ 30.725580] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.726091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.726794] ? __pfx_lock_acquire+0x10/0x10 [ 30.727342] ? __pfx_mmap_region+0x10/0x10 [ 30.727891] ? security_mmap_addr+0x7d/0xa0 [ 30.728461] ? get_unmapped_area+0x1f5/0x3f0 [ 30.729025] do_mmap+0x854/0xf00 [ 30.729481] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.729997] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.730583] ksys_mmap_pgoff+0x3af/0x500 [ 30.731103] do_syscall_64+0x3f/0x90 [ 30.731595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.732269] RIP: 0033:0x7f5ea5b38d82 [ 30.732749] 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 [ 30.734955] RSP: 002b:00007ffd68896ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.735890] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ea5b38d82 [ 30.736774] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ea4f72000 [ 30.737646] RBP: 00007f5ea4f72000 R08: 0000000000000009 R09: 0000000000001000 [ 30.738521] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa0727cf70 [ 30.739399] R13: 00007ffd68896d00 R14: 00007ffd68896d30 R15: 00007ffd68897090 [ 30.740287] [ 30.740606] [ 30.740829] Allocated by task 213: [ 30.741274] kasan_save_stack+0x22/0x50 [ 30.741794] kasan_set_track+0x25/0x30 [ 30.742304] __kasan_slab_alloc+0x59/0x70 [ 30.742849] kmem_cache_alloc+0x16b/0x370 [ 30.743377] vm_area_dup+0x20/0x160 [ 30.743849] __split_vma+0x170/0x950 [ 30.744342] split_vma+0xc6/0x110 [ 30.744810] mprotect_fixup+0x8d2/0xb30 [ 30.745361] do_mprotect_pkey+0x87e/0xd40 [ 30.745913] __x64_sys_mprotect+0x78/0xc0 [ 30.746472] do_syscall_64+0x3f/0x90 [ 30.746966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747644] [ 30.747865] Freed by task 13: [ 30.748274] kasan_save_stack+0x22/0x50 [ 30.748828] kasan_set_track+0x25/0x30 [ 30.749367] kasan_save_free_info+0x2b/0x50 [ 30.749922] __kasan_slab_free+0x10a/0x190 [ 30.750496] kmem_cache_free+0x10d/0x4d0 [ 30.751027] rcu_core+0x8c8/0x2860 [ 30.751497] __do_softirq+0x1b7/0x7d4 [ 30.751999] [ 30.752237] Last potentially related work creation: [ 30.752855] kasan_save_stack+0x22/0x50 [ 30.753403] __kasan_record_aux_stack+0x8e/0xa0 [ 30.754055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.754721] remove_vma+0x139/0x170 [ 30.755197] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.755776] do_vmi_munmap+0x1f1/0x2b0 [ 30.756286] __vm_munmap+0x138/0x3a0 [ 30.756794] __x64_sys_munmap+0x59/0x80 [ 30.757330] do_syscall_64+0x3f/0x90 [ 30.757825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758503] [ 30.758730] The buggy address belongs to the object at ffff8880183d21d0 [ 30.758730] which belongs to the cache vm_area_struct of size 168 [ 30.760284] The buggy address is located 88 bytes inside of [ 30.760284] freed 168-byte region [ffff8880183d21d0, ffff8880183d2278) [ 30.761776] [ 30.761998] The buggy address belongs to the physical page: [ 30.762708] page:0000000068afa5f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x183d2 [ 30.763850] memcg:ffff888016261c01 [ 30.764307] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.764996] page_type: 0xffffffff() [ 30.765487] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.766464] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016261c01 [ 30.767418] page dumped because: kasan: bad access detected [ 30.768117] [ 30.768339] Memory state around the buggy address: [ 30.768967] ffff8880183d2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.769871] ffff8880183d2180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.770771] >ffff8880183d2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.771677] ^ [ 30.772266] ffff8880183d2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.773199] ffff8880183d2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.774103] ================================================================== [ 30.775064] Disabling lock debugging due to kernel taint [ 33.340673] BUG: Bad rss-counter state mm:000000009f8f96e5 type:MM_FILEPAGES val:33 [ 33.341653] BUG: Bad rss-counter state mm:000000009f8f96e5 type:MM_ANONPAGES val:22 [ 33.786441] BUG: Bad rss-counter state mm:000000004f4af1a5 type:MM_FILEPAGES val:33 [ 33.787436] BUG: Bad rss-counter state mm:000000004f4af1a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28070' (ECDSA) to the list of known hosts. 2023/06/20 21:31:31 fuzzer started 2023/06/20 21:31:31 dialing manager at localhost:36067 2023/06/20 21:31:31 checking machine... 2023/06/20 21:31:31 checking revisions... [ 34.462712] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:31:31 testing simple program... [ 34.504244] cgroup: Unknown subsys name 'net' [ 34.564458] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:31:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88801460b680 RSI=ffffffff815a7333 RDI=0000000000000006 RBP=ffff88800d87fd28 RSP=ffff88800d87fc60 R8 =0000000000000006 R9 =0000000000000101 R10=000000000000002f R11=0000000000000000 R12=000000000000002f R13=ffff88800d87fd60 R14=0000000000000101 R15=ffffc90000693220 RIP=ffffffff815a7337 RFL=00000292 [--S-A--] 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 00007f3234705900 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=00007f3233b5e540 CR3=000000000d83a000 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=52a877880954bf0100000000000ae988 XMM05=7e20370b7f25d6410000000000133880 XMM06=19e9129bd510f23500000000001326e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002c4afbe RCX=ffffffff8363c0a4 RDX=ffff888016c59b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801689c500 RSP=ffff888016257de8 R8 =0000000000000005 R9 =0000000000000080 R10=000000000000000c R11=0000000000000000 R12=000000000000000c R13=00007ffd3f4ea388 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000283 [--S---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe0bfd12900 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=00007ffd3f4e7000 CR3=000000001befa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000