syzkaller login: [ 30.893883] BUG: Bad rss-counter state mm:0000000078e97e1a type:MM_FILEPAGES val:33 [ 30.894992] BUG: Bad rss-counter state mm:0000000078e97e1a type:MM_ANONPAGES val:22 [ 31.039289] ================================================================== [ 31.040373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.041500] Read of size 8 at addr ffff8880139f2880 by task sshd/220 [ 31.042489] [ 31.042704] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.043565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.044585] Call Trace: [ 31.044902] [ 31.045189] dump_stack_lvl+0x91/0xf0 [ 31.045671] print_report+0xcc/0x620 [ 31.046149] ? __virt_addr_valid+0x102/0x340 [ 31.046701] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.047314] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.047916] kasan_report+0xbe/0xf0 [ 31.048376] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048986] vma_interval_tree_remove+0xc75/0xec0 [ 31.049574] vma_prepare+0xc54/0x11a0 [ 31.050048] __split_vma+0x5af/0x950 [ 31.050507] ? __pfx___split_vma+0x10/0x10 [ 31.051076] ? find_held_lock+0x2c/0x110 [ 31.051596] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.052150] ? lock_is_held_type+0x9f/0x120 [ 31.052677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.053273] ? mtree_range_walk+0x632/0x900 [ 31.053807] ? mas_walk+0x5c7/0x7c0 [ 31.054276] do_vmi_munmap+0x1f1/0x2b0 [ 31.054748] mmap_region+0x1f9/0x2660 [ 31.055235] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.055729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.056418] ? __pfx_lock_acquire+0x10/0x10 [ 31.056933] ? __pfx_mmap_region+0x10/0x10 [ 31.057463] ? security_mmap_addr+0x7d/0xa0 [ 31.057972] ? get_unmapped_area+0x1f5/0x3f0 [ 31.058498] do_mmap+0x854/0xf00 [ 31.058938] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.059425] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.059967] ksys_mmap_pgoff+0x3af/0x500 [ 31.060457] do_syscall_64+0x3f/0x90 [ 31.060925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.061575] RIP: 0033:0x7f24f9e21d82 [ 31.062027] 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 [ 31.064112] RSP: 002b:00007ffe0114c6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.064995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f24f9e21d82 [ 31.065835] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24f925b000 [ 31.066667] RBP: 00007f24f925b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.067522] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565457896f70 [ 31.068355] R13: 00007ffe0114c6c0 R14: 00007ffe0114c6f0 R15: 00007ffe0114ca50 [ 31.069237] [ 31.069520] [ 31.069731] Allocated by task 213: [ 31.070141] kasan_save_stack+0x22/0x50 [ 31.070627] kasan_set_track+0x25/0x30 [ 31.071116] __kasan_slab_alloc+0x59/0x70 [ 31.071621] kmem_cache_alloc+0x16b/0x370 [ 31.072119] vm_area_dup+0x20/0x160 [ 31.072559] __split_vma+0x170/0x950 [ 31.073008] split_vma+0xc6/0x110 [ 31.073431] mprotect_fixup+0x8d2/0xb30 [ 31.073916] do_mprotect_pkey+0x87e/0xd40 [ 31.074418] __x64_sys_mprotect+0x78/0xc0 [ 31.074938] do_syscall_64+0x3f/0x90 [ 31.075400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076027] [ 31.076235] Freed by task 203: [ 31.076616] kasan_save_stack+0x22/0x50 [ 31.077104] kasan_set_track+0x25/0x30 [ 31.077583] kasan_save_free_info+0x2b/0x50 [ 31.078108] __kasan_slab_free+0x10a/0x190 [ 31.078624] kmem_cache_free+0x10d/0x4d0 [ 31.079133] rcu_core+0x8c8/0x2860 [ 31.079574] __do_softirq+0x1b7/0x7d4 [ 31.080039] [ 31.080257] Last potentially related work creation: [ 31.080828] kasan_save_stack+0x22/0x50 [ 31.081555] __kasan_record_aux_stack+0x8e/0xa0 [ 31.082167] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.082931] remove_vma+0x139/0x170 [ 31.083383] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.083926] do_vmi_munmap+0x1f1/0x2b0 [ 31.084401] __vm_munmap+0x138/0x3a0 [ 31.084858] __x64_sys_munmap+0x59/0x80 [ 31.085344] do_syscall_64+0x3f/0x90 [ 31.085810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.086441] [ 31.086655] The buggy address belongs to the object at ffff8880139f2828 [ 31.086655] which belongs to the cache vm_area_struct of size 168 [ 31.088096] The buggy address is located 88 bytes inside of [ 31.088096] freed 168-byte region [ffff8880139f2828, ffff8880139f28d0) [ 31.089481] [ 31.089694] The buggy address belongs to the physical page: [ 31.090336] page:00000000ac3d950b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x139f2 [ 31.091407] memcg:ffff88800fe31d01 [ 31.091822] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.092460] page_type: 0xffffffff() [ 31.092901] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.093809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe31d01 [ 31.094701] page dumped because: kasan: bad access detected [ 31.095371] [ 31.095581] Memory state around the buggy address: [ 31.096148] ffff8880139f2780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.096987] ffff8880139f2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.097820] >ffff8880139f2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.098654] ^ [ 31.099071] ffff8880139f2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.099910] ffff8880139f2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.100743] ================================================================== [ 31.101912] Disabling lock debugging due to kernel taint [ 33.300950] BUG: Bad rss-counter state mm:00000000de24609e type:MM_FILEPAGES val:33 [ 33.301764] BUG: Bad rss-counter state mm:00000000de24609e type:MM_ANONPAGES val:22 [ 33.721752] BUG: Bad rss-counter state mm:00000000ce51e172 type:MM_FILEPAGES val:33 [ 33.722846] BUG: Bad rss-counter state mm:00000000ce51e172 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42055' (ECDSA) to the list of known hosts. 2023/06/21 04:12:50 fuzzer started 2023/06/21 04:12:50 dialing manager at localhost:36067 2023/06/21 04:12:50 checking machine... 2023/06/21 04:12:50 checking revisions... [ 34.447319] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:12:50 testing simple program... [ 34.496430] cgroup: Unknown subsys name 'net' [ 34.556342] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:49 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=0000000000000000 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888016ff73a8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880084c6140 R13=0000000000000000 R14=0000000000000000 R15=0000000000002800 RIP=ffffffff8180f12f 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 00007fc746c34900 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=00007fc746bf9008 CR3=000000000e4e4000 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=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 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=0000000000000001 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=00007f23f3471520 CR3=000000000c63c000 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=dc522b64743f41828c4a47ce665c0a9c XMM02=000000000011a5a0ec2efd57dc4c00df XMM03=0000000000121848a0dd2f8e8c24aba5 XMM04=b919fcbf761bfda400000000000ae988 XMM05=19e9129bd510f2350000000000131970 XMM06=24226110e14423ab00000000001307d8 XMM07=e042d86d42eb936e0000000000121ac8 XMM08=a0dd2f8e8c24aba5000000000011a600 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000