syzkaller login: [ 30.750385] BUG: Bad rss-counter state mm:00000000218001d2 type:MM_FILEPAGES val:33 [ 30.751387] BUG: Bad rss-counter state mm:00000000218001d2 type:MM_ANONPAGES val:22 [ 30.916849] ================================================================== [ 30.917845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.918914] Read of size 8 at addr ffff888019e37df0 by task sshd/220 [ 30.919732] [ 30.919967] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.920898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.921946] Call Trace: [ 30.922286] [ 30.922592] dump_stack_lvl+0x91/0xf0 [ 30.923120] print_report+0xcc/0x620 [ 30.923632] ? __virt_addr_valid+0x102/0x340 [ 30.924224] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924917] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.925568] kasan_report+0xbe/0xf0 [ 30.926087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.926756] vma_interval_tree_remove+0xc75/0xec0 [ 30.927409] vma_prepare+0xc54/0x11a0 [ 30.927927] __split_vma+0x5af/0x950 [ 30.928436] ? __pfx___split_vma+0x10/0x10 [ 30.929011] ? find_held_lock+0x2c/0x110 [ 30.929574] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.930180] ? lock_is_held_type+0x9f/0x120 [ 30.930763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.931414] ? mtree_range_walk+0x632/0x900 [ 30.932012] ? mas_walk+0x5c7/0x7c0 [ 30.932533] do_vmi_munmap+0x1f1/0x2b0 [ 30.933068] mmap_region+0x1f9/0x2660 [ 30.933586] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.934132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.934902] ? __pfx_lock_acquire+0x10/0x10 [ 30.935471] ? __pfx_mmap_region+0x10/0x10 [ 30.936042] ? security_mmap_addr+0x7d/0xa0 [ 30.936629] ? get_unmapped_area+0x1f5/0x3f0 [ 30.937219] do_mmap+0x854/0xf00 [ 30.937695] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.938225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.938827] ksys_mmap_pgoff+0x3af/0x500 [ 30.939385] do_syscall_64+0x3f/0x90 [ 30.939907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.940621] RIP: 0033:0x7f3c54441d82 [ 30.941114] 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 [ 30.943391] RSP: 002b:00007ffe5ddf6668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.944355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c54441d82 [ 30.945294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c5387b000 [ 30.946198] RBP: 00007f3c5387b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.947104] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d077f80b20 [ 30.948014] R13: 00007ffe5ddf6680 R14: 00007ffe5ddf66b0 R15: 00007ffe5ddf6a10 [ 30.948933] [ 30.949248] [ 30.949483] Allocated by task 213: [ 30.949947] kasan_save_stack+0x22/0x50 [ 30.950490] kasan_set_track+0x25/0x30 [ 30.951024] __kasan_slab_alloc+0x59/0x70 [ 30.951587] kmem_cache_alloc+0x16b/0x370 [ 30.952143] vm_area_dup+0x20/0x160 [ 30.952637] __split_vma+0x170/0x950 [ 30.953137] split_vma+0xc6/0x110 [ 30.953612] mprotect_fixup+0x8d2/0xb30 [ 30.954156] do_mprotect_pkey+0x87e/0xd40 [ 30.954718] __x64_sys_mprotect+0x78/0xc0 [ 30.955277] do_syscall_64+0x3f/0x90 [ 30.955791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.956500] [ 30.956731] Freed by task 19: [ 30.957140] kasan_save_stack+0x22/0x50 [ 30.957682] kasan_set_track+0x25/0x30 [ 30.958212] kasan_save_free_info+0x2b/0x50 [ 30.958785] __kasan_slab_free+0x10a/0x190 [ 30.959361] kmem_cache_free+0x10d/0x4d0 [ 30.959911] rcu_core+0x8c8/0x2860 [ 30.960393] __do_softirq+0x1b7/0x7d4 [ 30.960912] [ 30.961142] Last potentially related work creation: [ 30.961777] kasan_save_stack+0x22/0x50 [ 30.962313] __kasan_record_aux_stack+0x8e/0xa0 [ 30.962935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.963627] remove_vma+0x139/0x170 [ 30.964114] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.964725] do_vmi_munmap+0x1f1/0x2b0 [ 30.965262] __vm_munmap+0x138/0x3a0 [ 30.965764] __x64_sys_munmap+0x59/0x80 [ 30.966300] do_syscall_64+0x3f/0x90 [ 30.966811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967499] [ 30.967730] The buggy address belongs to the object at ffff888019e37d98 [ 30.967730] which belongs to the cache vm_area_struct of size 168 [ 30.969321] The buggy address is located 88 bytes inside of [ 30.969321] freed 168-byte region [ffff888019e37d98, ffff888019e37e40) [ 30.970828] [ 30.971058] The buggy address belongs to the physical page: [ 30.971768] page:00000000ce943e5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e37 [ 30.972956] memcg:ffff888010309c01 [ 30.973425] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.974111] page_type: 0xffffffff() [ 30.974588] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.975577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010309c01 [ 30.976569] page dumped because: kasan: bad access detected [ 30.977278] [ 30.977508] Memory state around the buggy address: [ 30.978132] ffff888019e37c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.979044] ffff888019e37d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.979967] >ffff888019e37d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.980899] ^ [ 30.981769] ffff888019e37e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.982678] ffff888019e37e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.983587] ================================================================== [ 30.984844] Disabling lock debugging due to kernel taint [ 32.917283] BUG: Bad rss-counter state mm:00000000b6a27c75 type:MM_FILEPAGES val:33 [ 32.918465] BUG: Bad rss-counter state mm:00000000b6a27c75 type:MM_ANONPAGES val:22 [ 33.267808] BUG: Bad rss-counter state mm:00000000034e7c5a type:MM_FILEPAGES val:33 [ 33.268892] BUG: Bad rss-counter state mm:00000000034e7c5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2213' (ECDSA) to the list of known hosts. 2023/06/20 19:52:59 fuzzer started 2023/06/20 19:52:59 dialing manager at localhost:36067 2023/06/20 19:53:00 checking machine... 2023/06/20 19:53:00 checking revisions... [ 33.991854] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:53:00 testing simple program... [ 34.050974] cgroup: Unknown subsys name 'net' [ 34.099691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:52:59 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=00000000000a18e0 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff88800844f780 RSP=ffff88806ce09df8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=0000000000000001 R14=ffffffff813782f8 R15=ffff88800cafdd90 RIP=ffffffff845118ab RFL=00000046 [---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 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=00007f9a7d0b16f0 CR3=000000000f382000 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=2039353a32353a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32353a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016717c08 RCX=0000000000000001 RDX=1ffff11002ce2e0c RSI=ffff888016717bd8 RDI=ffff888016717060 RBP=ffff888016710000 RSP=ffff888016716fe0 R8 =0000000000000001 R9 =ffff888016717090 R10=0000000000038001 R11=00000000000b3fb2 R12=ffff8880167170b0 R13=ffff888016717098 R14=ffff888016717bd8 R15=ffff888016717050 RIP=ffffffff81131cac 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 00007f687e8a5900 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=00007f687e86a008 CR3=0000000016832000 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