syzkaller login: [ 38.706331] BUG: Bad rss-counter state mm:00000000eb4c6a94 type:MM_FILEPAGES val:33 [ 38.707340] BUG: Bad rss-counter state mm:00000000eb4c6a94 type:MM_ANONPAGES val:22 [ 38.870428] ================================================================== [ 38.871502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.872606] Read of size 8 at addr ffff88800df50b38 by task sshd/230 [ 38.873621] [ 38.873884] CPU: 0 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.874895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.876004] Call Trace: [ 38.876330] [ 38.876617] dump_stack_lvl+0x91/0xf0 [ 38.877125] print_report+0xcc/0x620 [ 38.877606] ? __virt_addr_valid+0x102/0x340 [ 38.878172] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878796] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879427] kasan_report+0xbe/0xf0 [ 38.879906] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880522] vma_interval_tree_remove+0xc75/0xec0 [ 38.881116] vma_prepare+0xc54/0x11a0 [ 38.881592] __split_vma+0x5af/0x950 [ 38.882067] ? __pfx___split_vma+0x10/0x10 [ 38.882597] ? find_held_lock+0x2c/0x110 [ 38.883117] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.883687] ? lock_is_held_type+0x9f/0x120 [ 38.884224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.884834] ? mtree_range_walk+0x632/0x900 [ 38.885385] ? mas_walk+0x5c7/0x7c0 [ 38.885859] do_vmi_munmap+0x1f1/0x2b0 [ 38.886350] mmap_region+0x1f9/0x2660 [ 38.886842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.887361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.888081] ? __pfx_lock_acquire+0x10/0x10 [ 38.888611] ? __pfx_mmap_region+0x10/0x10 [ 38.889163] ? security_mmap_addr+0x7d/0xa0 [ 38.889694] ? get_unmapped_area+0x1f5/0x3f0 [ 38.890262] do_mmap+0x854/0xf00 [ 38.890705] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.891206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.891794] ksys_mmap_pgoff+0x3af/0x500 [ 38.892313] do_syscall_64+0x3f/0x90 [ 38.892800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893460] RIP: 0033:0x7fdc9ada2d82 [ 38.893917] 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 [ 38.896063] RSP: 002b:00007ffdd09a5988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.896972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc9ada2d82 [ 38.897836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc9a1dc000 [ 38.898717] RBP: 00007fdc9a1dc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.899580] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563dc014bec0 [ 38.900424] R13: 00007ffdd09a59a0 R14: 00007ffdd09a59d0 R15: 00007ffdd09a5d30 [ 38.901295] [ 38.901587] [ 38.901804] Allocated by task 223: [ 38.902234] kasan_save_stack+0x22/0x50 [ 38.902760] kasan_set_track+0x25/0x30 [ 38.903252] __kasan_slab_alloc+0x59/0x70 [ 38.903804] kmem_cache_alloc+0x16b/0x370 [ 38.904323] vm_area_dup+0x20/0x160 [ 38.904786] __split_vma+0x170/0x950 [ 38.905247] split_vma+0xc6/0x110 [ 38.905685] mprotect_fixup+0x8d2/0xb30 [ 38.906204] do_mprotect_pkey+0x87e/0xd40 [ 38.906731] __x64_sys_mprotect+0x78/0xc0 [ 38.907262] do_syscall_64+0x3f/0x90 [ 38.907751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908405] [ 38.908618] Freed by task 223: [ 38.909010] kasan_save_stack+0x22/0x50 [ 38.909518] kasan_set_track+0x25/0x30 [ 38.910015] kasan_save_free_info+0x2b/0x50 [ 38.910564] __kasan_slab_free+0x10a/0x190 [ 38.911095] kmem_cache_free+0x10d/0x4d0 [ 38.911623] rcu_core+0x8c8/0x2860 [ 38.912066] __do_softirq+0x1b7/0x7d4 [ 38.912560] [ 38.912776] Last potentially related work creation: [ 38.913373] kasan_save_stack+0x22/0x50 [ 38.913878] __kasan_record_aux_stack+0x8e/0xa0 [ 38.914467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.915120] remove_vma+0x139/0x170 [ 38.915586] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.916144] do_vmi_munmap+0x1f1/0x2b0 [ 38.916643] __vm_munmap+0x138/0x3a0 [ 38.917113] __x64_sys_munmap+0x59/0x80 [ 38.917612] do_syscall_64+0x3f/0x90 [ 38.918099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918749] [ 38.918967] The buggy address belongs to the object at ffff88800df50ae0 [ 38.918967] which belongs to the cache vm_area_struct of size 168 [ 38.920496] The buggy address is located 88 bytes inside of [ 38.920496] freed 168-byte region [ffff88800df50ae0, ffff88800df50b88) [ 38.921921] [ 38.922139] The buggy address belongs to the physical page: [ 38.922799] page:000000005efeec04 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf50 [ 38.923903] memcg:ffff88800edf1401 [ 38.924348] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.924989] page_type: 0xffffffff() [ 38.925454] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.926383] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edf1401 [ 38.927293] page dumped because: kasan: bad access detected [ 38.927968] [ 38.928183] Memory state around the buggy address: [ 38.928772] ffff88800df50a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.929642] ffff88800df50a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.930504] >ffff88800df50b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.931374] ^ [ 38.931996] ffff88800df50b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.932864] ffff88800df50c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.933730] ================================================================== [ 38.934697] Disabling lock debugging due to kernel taint [ 40.908246] BUG: Bad rss-counter state mm:0000000088b2af2e type:MM_FILEPAGES val:33 [ 40.909451] BUG: Bad rss-counter state mm:0000000088b2af2e type:MM_ANONPAGES val:22 [ 41.306711] BUG: Bad rss-counter state mm:00000000714527d7 type:MM_FILEPAGES val:33 [ 41.307803] BUG: Bad rss-counter state mm:00000000714527d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42391' (ECDSA) to the list of known hosts. 2023/06/20 11:52:36 fuzzer started 2023/06/20 11:52:36 dialing manager at localhost:36067 2023/06/20 11:52:36 checking machine... 2023/06/20 11:52:36 checking revisions... [ 42.068277] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:52:36 testing simple program... [ 42.120033] cgroup: Unknown subsys name 'net' [ 42.178926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:52:36 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000bd5021fc RCX=ffff88806c410fe0 RDX=0000000000000014 RSI=0000000000000001 RDI=00000000c765843c RBP=ffff88800ca025e0 RSP=ffff88801669f1a8 R8 =000000001ac83b83 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff88801669f210 R15=0000000000000014 RIP=ffffffff822704d3 RFL=00000206 [-----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 00007f1b3b765900 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=00007f1b3bd1c618 CR3=000000000e786000 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=00007f95d25c0b20 CR3=000000000eb26000 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=b617c2c4f5736492ae4b0d62b2eae5ad XMM02=ec2efd57dc4c00df000000000011b410 XMM03=636079814642a0d2000000000011b4e0 XMM04=a4bfc6551e5f30dc00000000000ae988 XMM05=2212fbcb851445dd0000000000132760 XMM06=d74844bf967d85ba0000000000131818 XMM07=e042d86d42eb936e00000000001220f8 XMM08=636079814642a0d2000000000011b4e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000