syzkaller login: [ 60.717830] BUG: Bad rss-counter state mm:00000000fe125d50 type:MM_FILEPAGES val:33 [ 60.719181] BUG: Bad rss-counter state mm:00000000fe125d50 type:MM_ANONPAGES val:22 [ 60.887758] ================================================================== [ 60.888795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.889942] Read of size 8 at addr ffff88800bfe3058 by task sshd/229 [ 60.890955] [ 60.891272] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.892401] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.893685] Call Trace: [ 60.894110] [ 60.894485] dump_stack_lvl+0x91/0xf0 [ 60.895143] print_report+0xcc/0x620 [ 60.895791] ? __virt_addr_valid+0x102/0x340 [ 60.896401] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.897027] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.897664] kasan_report+0xbe/0xf0 [ 60.898174] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.898800] vma_interval_tree_remove+0xc75/0xec0 [ 60.899455] vma_prepare+0xc54/0x11a0 [ 60.899937] __split_vma+0x5af/0x950 [ 60.900448] ? __pfx___split_vma+0x10/0x10 [ 60.900982] ? find_held_lock+0x2c/0x110 [ 60.901529] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.902108] ? lock_is_held_type+0x9f/0x120 [ 60.902649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.903277] ? mtree_range_walk+0x632/0x900 [ 60.903829] ? mas_walk+0x5c7/0x7c0 [ 60.904349] do_vmi_munmap+0x1f1/0x2b0 [ 60.904842] mmap_region+0x1f9/0x2660 [ 60.905469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.906172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.907165] ? __pfx_lock_acquire+0x10/0x10 [ 60.907908] ? __pfx_mmap_region+0x10/0x10 [ 60.908640] ? security_mmap_addr+0x7d/0xa0 [ 60.909360] ? get_unmapped_area+0x1f5/0x3f0 [ 60.910135] do_mmap+0x854/0xf00 [ 60.910742] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.911455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.912217] ksys_mmap_pgoff+0x3af/0x500 [ 60.912912] do_syscall_64+0x3f/0x90 [ 60.913574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.914447] RIP: 0033:0x7fc00e41cd82 [ 60.915065] 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 [ 60.917866] RSP: 002b:00007ffd6aec0a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.919098] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc00e41cd82 [ 60.919993] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc00d856000 [ 60.920914] RBP: 00007fc00d856000 R08: 0000000000000009 R09: 0000000000001000 [ 60.921843] R10: 0000000000000812 R11: 0000000000000206 R12: 000056107c54cb20 [ 60.923002] R13: 00007ffd6aec0aa0 R14: 00007ffd6aec0ad0 R15: 00007ffd6aec0e30 [ 60.924183] [ 60.924578] [ 60.924868] Allocated by task 222: [ 60.925466] kasan_save_stack+0x22/0x50 [ 60.926159] kasan_set_track+0x25/0x30 [ 60.926840] __kasan_slab_alloc+0x59/0x70 [ 60.927569] kmem_cache_alloc+0x16b/0x370 [ 60.928290] vm_area_dup+0x20/0x160 [ 60.928923] __split_vma+0x170/0x950 [ 60.929569] split_vma+0xc6/0x110 [ 60.930174] mprotect_fixup+0x8d2/0xb30 [ 60.930856] do_mprotect_pkey+0x87e/0xd40 [ 60.931600] __x64_sys_mprotect+0x78/0xc0 [ 60.932316] do_syscall_64+0x3f/0x90 [ 60.932893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.933583] [ 60.933800] Freed by task 204: [ 60.934251] kasan_save_stack+0x22/0x50 [ 60.934762] kasan_set_track+0x25/0x30 [ 60.935299] kasan_save_free_info+0x2b/0x50 [ 60.935831] __kasan_slab_free+0x10a/0x190 [ 60.936402] kmem_cache_free+0x10d/0x4d0 [ 60.936921] rcu_core+0x8c8/0x2860 [ 60.937398] __do_softirq+0x1b7/0x7d4 [ 60.937877] [ 60.938107] Last potentially related work creation: [ 60.938699] kasan_save_stack+0x22/0x50 [ 60.939238] __kasan_record_aux_stack+0x8e/0xa0 [ 60.939816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.940469] remove_vma+0x139/0x170 [ 60.940920] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.941486] do_vmi_munmap+0x1f1/0x2b0 [ 60.941975] __vm_munmap+0x138/0x3a0 [ 60.942444] __x64_sys_munmap+0x59/0x80 [ 60.942936] do_syscall_64+0x3f/0x90 [ 60.943462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.944112] [ 60.944328] The buggy address belongs to the object at ffff88800bfe3000 [ 60.944328] which belongs to the cache vm_area_struct of size 168 [ 60.945833] The buggy address is located 88 bytes inside of [ 60.945833] freed 168-byte region [ffff88800bfe3000, ffff88800bfe30a8) [ 60.947669] [ 60.947954] The buggy address belongs to the physical page: [ 60.948841] page:00000000523512b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbfe3 [ 60.950310] memcg:ffff888009ee5c01 [ 60.950885] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.951637] page_type: 0xffffffff() [ 60.952114] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.953062] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ee5c01 [ 60.953999] page dumped because: kasan: bad access detected [ 60.954685] [ 60.954903] Memory state around the buggy address: [ 60.955652] ffff88800bfe2f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 60.956686] ffff88800bfe2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.957720] >ffff88800bfe3000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.958729] ^ [ 60.959612] ffff88800bfe3080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 60.960618] ffff88800bfe3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.961614] ================================================================== [ 60.962861] Disabling lock debugging due to kernel taint [ 62.718402] BUG: Bad rss-counter state mm:00000000a4f22626 type:MM_FILEPAGES val:33 [ 62.719426] BUG: Bad rss-counter state mm:00000000a4f22626 type:MM_ANONPAGES val:22 [ 63.207076] BUG: Bad rss-counter state mm:00000000aab68a8b type:MM_FILEPAGES val:33 [ 63.208331] BUG: Bad rss-counter state mm:00000000aab68a8b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50302' (ECDSA) to the list of known hosts. 2023/06/20 18:18:33 fuzzer started 2023/06/20 18:18:33 dialing manager at localhost:36067 2023/06/20 18:18:33 checking machine... 2023/06/20 18:18:33 checking revisions... [ 63.955802] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:18:33 testing simple program... [ 64.012853] cgroup: Unknown subsys name 'net' [ 64.051946] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:18:33 Registers: info registers vcpu 0 RAX=1ffff110019034d1 RBX=ffff88800c81a658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c81a688 RBP=ffff88800eeb2000 RSP=ffff88800fb2f888 R8 =0000000000000001 R9 =ffffed1001f65f05 R10=0000000000000003 R11=00030009ff02000a R12=dffffc0000000000 R13=ffff88800f01a000 R14=ffffffff8367562f R15=00000000000000a4 RIP=ffffffff818464e2 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 00007f67dc718900 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=00007f67dcccf618 CR3=00000000197ae000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007f2bc8b67360 CR3=0000000009f48000 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=35998b05264f21a3084217877ba0ad8e XMM02=000000000011a5b0ec2efd57dc4c00df XMM03=0000000000120f5020b0aef36eed65f9 XMM04=4716034f9588701b00000000000ae988 XMM05=0b39c798a71319b60000000000130a60 XMM06=1cf730b4c699cd2b000000000012f4d0 XMM07=e042d86d42eb936e00000000001211d0 XMM08=20b0aef36eed65f9000000000011a610 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000