syzkaller login: [ 30.778359] BUG: Bad rss-counter state mm:00000000499f5378 type:MM_FILEPAGES val:33 [ 30.779535] BUG: Bad rss-counter state mm:00000000499f5378 type:MM_ANONPAGES val:22 [ 30.902324] ================================================================== [ 30.903398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.904539] Read of size 8 at addr ffff88801ab60b38 by task sshd/220 [ 30.905444] [ 30.905664] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.906535] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.907510] Call Trace: [ 30.907833] [ 30.908135] dump_stack_lvl+0x91/0xf0 [ 30.908663] print_report+0xcc/0x620 [ 30.909150] ? __virt_addr_valid+0x102/0x340 [ 30.909710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.910326] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.910953] kasan_report+0xbe/0xf0 [ 30.911431] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.912051] vma_interval_tree_remove+0xc75/0xec0 [ 30.912675] vma_prepare+0xc54/0x11a0 [ 30.913151] __split_vma+0x5af/0x950 [ 30.913627] ? __pfx___split_vma+0x10/0x10 [ 30.914156] ? find_held_lock+0x2c/0x110 [ 30.914680] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.915314] ? lock_is_held_type+0x9f/0x120 [ 30.915877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.916521] ? mtree_range_walk+0x632/0x900 [ 30.917077] ? mas_walk+0x5c7/0x7c0 [ 30.917565] do_vmi_munmap+0x1f1/0x2b0 [ 30.918064] mmap_region+0x1f9/0x2660 [ 30.918560] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.919085] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.919819] ? __pfx_lock_acquire+0x10/0x10 [ 30.920369] ? __pfx_mmap_region+0x10/0x10 [ 30.920926] ? security_mmap_addr+0x7d/0xa0 [ 30.921490] ? get_unmapped_area+0x1f5/0x3f0 [ 30.922063] do_mmap+0x854/0xf00 [ 30.922528] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.923044] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.923633] ksys_mmap_pgoff+0x3af/0x500 [ 30.924181] do_syscall_64+0x3f/0x90 [ 30.924701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.925388] RIP: 0033:0x7f215e401d82 [ 30.925868] 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 [ 30.928119] RSP: 002b:00007ffe1300e2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.929066] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f215e401d82 [ 30.929951] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f215d83b000 [ 30.930849] RBP: 00007f215d83b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.931723] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa07c64ec0 [ 30.932619] R13: 00007ffe1300e310 R14: 00007ffe1300e340 R15: 00007ffe1300e6a0 [ 30.933551] [ 30.933851] [ 30.934068] Allocated by task 213: [ 30.934511] kasan_save_stack+0x22/0x50 [ 30.935028] kasan_set_track+0x25/0x30 [ 30.935543] __kasan_slab_alloc+0x59/0x70 [ 30.936076] kmem_cache_alloc+0x16b/0x370 [ 30.936620] vm_area_dup+0x20/0x160 [ 30.937095] __split_vma+0x170/0x950 [ 30.937588] split_vma+0xc6/0x110 [ 30.938051] mprotect_fixup+0x8d2/0xb30 [ 30.938574] do_mprotect_pkey+0x87e/0xd40 [ 30.939123] __x64_sys_mprotect+0x78/0xc0 [ 30.939676] do_syscall_64+0x3f/0x90 [ 30.940172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.940864] [ 30.941083] Freed by task 210: [ 30.941486] kasan_save_stack+0x22/0x50 [ 30.942006] kasan_set_track+0x25/0x30 [ 30.942514] kasan_save_free_info+0x2b/0x50 [ 30.943054] __kasan_slab_free+0x10a/0x190 [ 30.943601] kmem_cache_free+0x10d/0x4d0 [ 30.944116] rcu_core+0x8c8/0x2860 [ 30.944581] __do_softirq+0x1b7/0x7d4 [ 30.945072] [ 30.945301] Last potentially related work creation: [ 30.945914] kasan_save_stack+0x22/0x50 [ 30.946437] __kasan_record_aux_stack+0x8e/0xa0 [ 30.947030] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.947690] remove_vma+0x139/0x170 [ 30.948162] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.948768] do_vmi_munmap+0x1f1/0x2b0 [ 30.949282] __vm_munmap+0x138/0x3a0 [ 30.949765] __x64_sys_munmap+0x59/0x80 [ 30.950297] do_syscall_64+0x3f/0x90 [ 30.950796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.951475] [ 30.951697] The buggy address belongs to the object at ffff88801ab60ae0 [ 30.951697] which belongs to the cache vm_area_struct of size 168 [ 30.953276] The buggy address is located 88 bytes inside of [ 30.953276] freed 168-byte region [ffff88801ab60ae0, ffff88801ab60b88) [ 30.954749] [ 30.954974] The buggy address belongs to the physical page: [ 30.955681] page:00000000d4730d32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ab60 [ 30.956831] memcg:ffff888015bf9801 [ 30.957264] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.957942] page_type: 0xffffffff() [ 30.958401] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.959340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bf9801 [ 30.960272] page dumped because: kasan: bad access detected [ 30.960962] [ 30.961182] Memory state around the buggy address: [ 30.961803] ffff88801ab60a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.962702] ffff88801ab60a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.963595] >ffff88801ab60b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.964475] ^ [ 30.965141] ffff88801ab60b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.966007] ffff88801ab60c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.966885] ================================================================== [ 30.967988] Disabling lock debugging due to kernel taint [ 33.359960] BUG: Bad rss-counter state mm:0000000035411bf6 type:MM_FILEPAGES val:33 [ 33.361125] BUG: Bad rss-counter state mm:0000000035411bf6 type:MM_ANONPAGES val:22 [ 33.957241] BUG: Bad rss-counter state mm:000000009fc8d997 type:MM_FILEPAGES val:33 [ 33.958554] BUG: Bad rss-counter state mm:000000009fc8d997 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15688' (ECDSA) to the list of known hosts. 2023/06/21 07:36:30 fuzzer started 2023/06/21 07:36:31 dialing manager at localhost:36067 2023/06/21 07:36:31 checking machine... 2023/06/21 07:36:31 checking revisions... [ 34.551422] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:36:31 testing simple program... [ 34.602162] cgroup: Unknown subsys name 'net' [ 34.654974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:36:30 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff85652c08 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff814c855d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800d6a98d0 RIP=ffffffff84511dca 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 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=00007f4c7b050008 CR3=000000000d618000 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=0de5295a814a8ebeb24fb0cd4107b2b8 XMM02=000000000011d280eff9b2d0a8fce9cb XMM03=000000000011d3502c67c8bc2e329bc3 XMM04=0e567b040729d34500000000000ae988 XMM05=e4cb8bb95a7664b60000000000131860 XMM06=2b1d5252df30bfcf00000000001306c8 XMM07=e042d86d42eb936e0000000000121d10 XMM08=84854a2c5e982cd3000000000011d350 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000030 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=00007f5754fd2c20 RDI=000000000000000a RBP=00007ffcce8dfd30 RSP=00007ffcce8df7d8 R8 =00007ffcce8dfcf7 R9 =cccccccccccccccd R10=0000000000000000 R11=0000000000000000 R12=00007ffcce8dfd40 R13=00007f5754fd6258 R14=00007ffcce8dfe80 R15=0000000000000075 RIP=00007f5754e95eff RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5754a51900 00000000 00000000 GS =0000 0000000000000000 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=00007f5755008618 CR3=000000000dc92000 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=25252525252525252525252525252525 XMM01=ffffffffff00ff0000ff0000ff0000ff XMM02=ffffffffff0000000000000000000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=000000000075252e75252e75252e7525 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000