syzkaller login: [ 30.469506] BUG: Bad rss-counter state mm:000000004c62fcbf type:MM_FILEPAGES val:33 [ 30.471521] BUG: Bad rss-counter state mm:000000004c62fcbf type:MM_ANONPAGES val:22 [ 30.630393] ================================================================== [ 30.631316] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.632253] Read of size 8 at addr ffff888019cbcd08 by task sshd/220 [ 30.633032] [ 30.633248] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.634207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.635189] Call Trace: [ 30.635502] [ 30.635786] dump_stack_lvl+0x91/0xf0 [ 30.636292] print_report+0xcc/0x620 [ 30.636771] ? __virt_addr_valid+0x102/0x340 [ 30.637320] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.637941] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.638583] kasan_report+0xbe/0xf0 [ 30.639053] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.639673] vma_interval_tree_remove+0xc75/0xec0 [ 30.640282] vma_prepare+0xc54/0x11a0 [ 30.640755] __split_vma+0x5af/0x950 [ 30.641232] ? __pfx___split_vma+0x10/0x10 [ 30.641759] ? find_held_lock+0x2c/0x110 [ 30.642280] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.642855] ? lock_is_held_type+0x9f/0x120 [ 30.643393] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.643995] ? mtree_range_walk+0x632/0x900 [ 30.644548] ? mas_walk+0x5c7/0x7c0 [ 30.645028] do_vmi_munmap+0x1f1/0x2b0 [ 30.645526] mmap_region+0x1f9/0x2660 [ 30.646005] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.646523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.647239] ? __pfx_lock_acquire+0x10/0x10 [ 30.647762] ? __pfx_mmap_region+0x10/0x10 [ 30.648289] ? security_mmap_addr+0x7d/0xa0 [ 30.648820] ? get_unmapped_area+0x1f5/0x3f0 [ 30.649366] do_mmap+0x854/0xf00 [ 30.649800] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.650295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.650868] ksys_mmap_pgoff+0x3af/0x500 [ 30.651374] do_syscall_64+0x3f/0x90 [ 30.651860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.652501] RIP: 0033:0x7fe96a2dfd82 [ 30.652956] 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 [ 30.655083] RSP: 002b:00007ffc59d58d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.656000] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe96a2dfd82 [ 30.656839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe969719000 [ 30.657685] RBP: 00007fe969719000 R08: 0000000000000009 R09: 0000000000001000 [ 30.658539] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5d2530ec0 [ 30.659377] R13: 00007ffc59d58d80 R14: 00007ffc59d58db0 R15: 00007ffc59d59110 [ 30.660242] [ 30.660533] [ 30.660745] Allocated by task 213: [ 30.661178] kasan_save_stack+0x22/0x50 [ 30.661680] kasan_set_track+0x25/0x30 [ 30.662174] __kasan_slab_alloc+0x59/0x70 [ 30.662724] kmem_cache_alloc+0x16b/0x370 [ 30.663266] vm_area_dup+0x20/0x160 [ 30.663731] __split_vma+0x170/0x950 [ 30.664203] split_vma+0xc6/0x110 [ 30.664642] mprotect_fixup+0x8d2/0xb30 [ 30.665140] do_mprotect_pkey+0x87e/0xd40 [ 30.665659] __x64_sys_mprotect+0x78/0xc0 [ 30.666182] do_syscall_64+0x3f/0x90 [ 30.666666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.667309] [ 30.667523] Freed by task 213: [ 30.667915] kasan_save_stack+0x22/0x50 [ 30.668415] kasan_set_track+0x25/0x30 [ 30.668911] kasan_save_free_info+0x2b/0x50 [ 30.669443] __kasan_slab_free+0x10a/0x190 [ 30.669970] kmem_cache_free+0x10d/0x4d0 [ 30.670487] rcu_core+0x8c8/0x2860 [ 30.670935] __do_softirq+0x1b7/0x7d4 [ 30.671413] [ 30.671629] Last potentially related work creation: [ 30.672206] kasan_save_stack+0x22/0x50 [ 30.672704] __kasan_record_aux_stack+0x8e/0xa0 [ 30.673271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.673916] remove_vma+0x139/0x170 [ 30.674363] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.674927] do_vmi_munmap+0x1f1/0x2b0 [ 30.675409] __vm_munmap+0x138/0x3a0 [ 30.675873] __x64_sys_munmap+0x59/0x80 [ 30.676364] do_syscall_64+0x3f/0x90 [ 30.676835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.677485] [ 30.677697] The buggy address belongs to the object at ffff888019cbccb0 [ 30.677697] which belongs to the cache vm_area_struct of size 168 [ 30.679162] The buggy address is located 88 bytes inside of [ 30.679162] freed 168-byte region [ffff888019cbccb0, ffff888019cbcd58) [ 30.680551] [ 30.680766] The buggy address belongs to the physical page: [ 30.681436] page:00000000bce00f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cbc [ 30.682536] memcg:ffff88800f150001 [ 30.682964] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.683608] page_type: 0xffffffff() [ 30.684055] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.684970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f150001 [ 30.685866] page dumped because: kasan: bad access detected [ 30.686541] [ 30.686753] Memory state around the buggy address: [ 30.687330] ffff888019cbcc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.688182] ffff888019cbcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.689033] >ffff888019cbcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.689901] ^ [ 30.690349] ffff888019cbcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.691218] ffff888019cbce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.692068] ================================================================== [ 30.693184] Disabling lock debugging due to kernel taint [ 32.949397] BUG: Bad rss-counter state mm:000000003c95aac1 type:MM_FILEPAGES val:33 [ 32.950646] BUG: Bad rss-counter state mm:000000003c95aac1 type:MM_ANONPAGES val:22 [ 33.424654] BUG: Bad rss-counter state mm:00000000ce6bfee5 type:MM_FILEPAGES val:33 [ 33.425619] BUG: Bad rss-counter state mm:00000000ce6bfee5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40680' (ECDSA) to the list of known hosts. 2023/06/21 06:37:03 fuzzer started 2023/06/21 06:37:03 dialing manager at localhost:36067 2023/06/21 06:37:03 checking machine... 2023/06/21 06:37:03 checking revisions... [ 34.152470] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:37:03 testing simple program... [ 34.203974] cgroup: Unknown subsys name 'net' [ 34.240809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:37:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=0000000000000001 RDX=ffff88806ce35000 RSI=ffffffff8184725c RDI=ffff88800844f780 RBP=ffff888014677bb8 RSP=ffff888014677b60 R8 =ffff888014677b80 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffff88800d31aab0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff8135b958 RFL=00000286 [--S--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 00007fe4578c5900 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=00007fe457e7a650 CR3=000000000d610000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff83636c05 RDX=000000000002636c RSI=000000000002636c RDI=ffffffff865827a0 RBP=ffff8880147ef378 RSP=ffff8880147ef2b0 R8 =0000000000000000 R9 =ffff8880147ef360 R10=0000000000038001 R11=000000000009a995 R12=ffff8880147ef380 R13=ffff8880147ef368 R14=ffff8880147ef361 R15=ffff8880147ef320 RIP=ffffffff8113078b 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 00007f97d1c02900 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=00007f97d1028ea0 CR3=000000000ec02000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=727cdad458282a2300000000000ae988 XMM05=cd88f0118f4a0f600000000000133098 XMM06=19e9129bd510f2350000000000131f30 XMM07=fb795ef6d65770560000000000122178 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00002000000000000000000000200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000