syzkaller login: [ 38.757799] BUG: Bad rss-counter state mm:00000000ac95c832 type:MM_FILEPAGES val:33 [ 38.759132] BUG: Bad rss-counter state mm:00000000ac95c832 type:MM_ANONPAGES val:22 [ 38.910976] ================================================================== [ 38.911910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.912842] Read of size 8 at addr ffff88800eb5c5c8 by task sshd/219 [ 38.913604] [ 38.913820] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.914803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.915790] Call Trace: [ 38.916114] [ 38.916518] dump_stack_lvl+0x91/0xf0 [ 38.917010] print_report+0xcc/0x620 [ 38.917501] ? __virt_addr_valid+0x102/0x340 [ 38.918049] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.918673] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.919301] kasan_report+0xbe/0xf0 [ 38.919772] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920389] vma_interval_tree_remove+0xc75/0xec0 [ 38.920991] vma_prepare+0xc54/0x11a0 [ 38.921472] __split_vma+0x5af/0x950 [ 38.921949] ? __pfx___split_vma+0x10/0x10 [ 38.922484] ? find_held_lock+0x2c/0x110 [ 38.923017] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.923580] ? lock_is_held_type+0x9f/0x120 [ 38.924117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.924730] ? mtree_range_walk+0x632/0x900 [ 38.925285] ? mas_walk+0x5c7/0x7c0 [ 38.925763] do_vmi_munmap+0x1f1/0x2b0 [ 38.926255] mmap_region+0x1f9/0x2660 [ 38.926762] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.927270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.927994] ? __pfx_lock_acquire+0x10/0x10 [ 38.928530] ? __pfx_mmap_region+0x10/0x10 [ 38.929059] ? security_mmap_addr+0x7d/0xa0 [ 38.929590] ? get_unmapped_area+0x1f5/0x3f0 [ 38.930136] do_mmap+0x854/0xf00 [ 38.930576] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.931087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.931651] ksys_mmap_pgoff+0x3af/0x500 [ 38.932162] do_syscall_64+0x3f/0x90 [ 38.932637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933288] RIP: 0033:0x7fcdb1038d82 [ 38.933762] 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 [ 38.935909] RSP: 002b:00007ffd7a73c248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.936821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcdb1038d82 [ 38.937678] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdb0472000 [ 38.938534] RBP: 00007fcdb0472000 R08: 0000000000000009 R09: 0000000000001000 [ 38.939400] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a650cef70 [ 38.940247] R13: 00007ffd7a73c260 R14: 00007ffd7a73c290 R15: 00007ffd7a73c5f0 [ 38.941109] [ 38.941406] [ 38.941622] Allocated by task 212: [ 38.942048] kasan_save_stack+0x22/0x50 [ 38.942551] kasan_set_track+0x25/0x30 [ 38.943049] __kasan_slab_alloc+0x59/0x70 [ 38.943593] kmem_cache_alloc+0x16b/0x370 [ 38.944111] vm_area_dup+0x20/0x160 [ 38.944567] __split_vma+0x170/0x950 [ 38.945035] split_vma+0xc6/0x110 [ 38.945483] mprotect_fixup+0x8d2/0xb30 [ 38.945990] do_mprotect_pkey+0x87e/0xd40 [ 38.946524] __x64_sys_mprotect+0x78/0xc0 [ 38.947066] do_syscall_64+0x3f/0x90 [ 38.947554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948202] [ 38.948420] Freed by task 212: [ 38.948819] kasan_save_stack+0x22/0x50 [ 38.949322] kasan_set_track+0x25/0x30 [ 38.949816] kasan_save_free_info+0x2b/0x50 [ 38.950352] __kasan_slab_free+0x10a/0x190 [ 38.950912] kmem_cache_free+0x10d/0x4d0 [ 38.951426] rcu_core+0x8c8/0x2860 [ 38.951873] __do_softirq+0x1b7/0x7d4 [ 38.952353] [ 38.952572] Last potentially related work creation: [ 38.953169] kasan_save_stack+0x22/0x50 [ 38.953682] __kasan_record_aux_stack+0x8e/0xa0 [ 38.954279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.954938] remove_vma+0x139/0x170 [ 38.955398] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.955961] do_vmi_munmap+0x1f1/0x2b0 [ 38.956452] __vm_munmap+0x138/0x3a0 [ 38.956920] __x64_sys_munmap+0x59/0x80 [ 38.957425] do_syscall_64+0x3f/0x90 [ 38.957902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.958550] [ 38.958776] The buggy address belongs to the object at ffff88800eb5c570 [ 38.958776] which belongs to the cache vm_area_struct of size 168 [ 38.960256] The buggy address is located 88 bytes inside of [ 38.960256] freed 168-byte region [ffff88800eb5c570, ffff88800eb5c618) [ 38.961674] [ 38.961892] The buggy address belongs to the physical page: [ 38.962561] page:000000006c11cd17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb5c [ 38.963672] memcg:ffff88800ef24e01 [ 38.964101] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.964815] page_type: 0xffffffff() [ 38.965277] raw: 0100000000000200 ffff8880087a0c80 ffffea00003775c0 dead000000000005 [ 38.966212] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef24e01 [ 38.967128] page dumped because: kasan: bad access detected [ 38.967799] [ 38.968019] Memory state around the buggy address: [ 38.968606] ffff88800eb5c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.969461] ffff88800eb5c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.970313] >ffff88800eb5c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.971184] ^ [ 38.971861] ffff88800eb5c600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.972715] ffff88800eb5c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.973577] ================================================================== [ 38.974712] Disabling lock debugging due to kernel taint [ 40.972630] BUG: Bad rss-counter state mm:00000000b0aa3afa type:MM_FILEPAGES val:33 [ 40.973741] BUG: Bad rss-counter state mm:00000000b0aa3afa type:MM_ANONPAGES val:22 [ 41.542536] BUG: Bad rss-counter state mm:000000008b877871 type:MM_FILEPAGES val:33 [ 41.543787] BUG: Bad rss-counter state mm:000000008b877871 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58678' (ECDSA) to the list of known hosts. 2023/06/20 12:48:26 fuzzer started 2023/06/20 12:48:26 dialing manager at localhost:36067 2023/06/20 12:48:26 checking machine... 2023/06/20 12:48:26 checking revisions... [ 42.187507] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:48:26 testing simple program... [ 42.235239] cgroup: Unknown subsys name 'net' [ 42.278861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:48:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c13b1 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09d78 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b520 R15=0000000000000000 RIP=ffffffff812d8f0e 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 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=00007fa33fe33560 CR3=000000000ddce000 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=38343a3231203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303333 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff844c5a23 RDX=dffffc0000000000 RSI=0000000000034c5a RDI=ffff888018d1f158 RBP=ffff888018d1f1b0 RSP=ffff888018d1f0e8 R8 =0000000000000001 R9 =ffff888018d1f198 R10=0000000000038001 R11=00000000000b3c03 R12=ffff888018d1f1b8 R13=ffff888018d1f1a0 R14=ffff888018d1f199 R15=ffff888018d1f158 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007f941f47a900 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=00007f941f459020 CR3=000000000f796000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000