syzkaller login: [ 38.789159] BUG: Bad rss-counter state mm:00000000b91e53b5 type:MM_FILEPAGES val:33 [ 38.790477] BUG: Bad rss-counter state mm:00000000b91e53b5 type:MM_ANONPAGES val:22 [ 38.953538] ================================================================== [ 38.954535] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.955585] Read of size 8 at addr ffff888019f62140 by task sshd/219 [ 38.956579] [ 38.956823] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.957768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.958850] Call Trace: [ 38.959209] [ 38.959529] dump_stack_lvl+0x91/0xf0 [ 38.960096] print_report+0xcc/0x620 [ 38.960634] ? __virt_addr_valid+0x102/0x340 [ 38.961236] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.961907] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.962592] kasan_report+0xbe/0xf0 [ 38.963115] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.963810] vma_interval_tree_remove+0xc75/0xec0 [ 38.964499] vma_prepare+0xc54/0x11a0 [ 38.965034] __split_vma+0x5af/0x950 [ 38.965562] ? __pfx___split_vma+0x10/0x10 [ 38.966158] ? find_held_lock+0x2c/0x110 [ 38.966740] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.967376] ? lock_is_held_type+0x9f/0x120 [ 38.967985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.968676] ? mtree_range_walk+0x632/0x900 [ 38.969298] ? mas_walk+0x5c7/0x7c0 [ 38.969831] do_vmi_munmap+0x1f1/0x2b0 [ 38.970394] mmap_region+0x1f9/0x2660 [ 38.970944] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.971520] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.972347] ? __pfx_lock_acquire+0x10/0x10 [ 38.972955] ? __pfx_mmap_region+0x10/0x10 [ 38.973564] ? security_mmap_addr+0x7d/0xa0 [ 38.974165] ? get_unmapped_area+0x1f5/0x3f0 [ 38.974792] do_mmap+0x854/0xf00 [ 38.975297] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.975861] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.976511] ksys_mmap_pgoff+0x3af/0x500 [ 38.977087] do_syscall_64+0x3f/0x90 [ 38.977631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.978367] RIP: 0033:0x7f6a2f51cd82 [ 38.978884] 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 [ 38.981321] RSP: 002b:00007ffd8f7c2448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.982355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a2f51cd82 [ 38.983315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a2e956000 [ 38.984285] RBP: 00007f6a2e956000 R08: 0000000000000009 R09: 0000000000001000 [ 38.985247] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6502b0ec0 [ 38.986205] R13: 00007ffd8f7c2460 R14: 00007ffd8f7c2490 R15: 00007ffd8f7c27f0 [ 38.987061] [ 38.987350] [ 38.987566] Allocated by task 212: [ 38.988011] kasan_save_stack+0x22/0x50 [ 38.988514] kasan_set_track+0x25/0x30 [ 38.989006] __kasan_slab_alloc+0x59/0x70 [ 38.989530] kmem_cache_alloc+0x16b/0x370 [ 38.990041] vm_area_dup+0x20/0x160 [ 38.990485] __split_vma+0x170/0x950 [ 38.990947] split_vma+0xc6/0x110 [ 38.991386] mprotect_fixup+0x8d2/0xb30 [ 38.991882] do_mprotect_pkey+0x87e/0xd40 [ 38.992408] __x64_sys_mprotect+0x78/0xc0 [ 38.992936] do_syscall_64+0x3f/0x90 [ 38.993404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.994043] [ 38.994255] Freed by task 212: [ 38.994646] kasan_save_stack+0x22/0x50 [ 38.995144] kasan_set_track+0x25/0x30 [ 38.995633] kasan_save_free_info+0x2b/0x50 [ 38.996215] __kasan_slab_free+0x10a/0x190 [ 38.996796] kmem_cache_free+0x10d/0x4d0 [ 38.997357] rcu_core+0x8c8/0x2860 [ 38.997845] __do_softirq+0x1b7/0x7d4 [ 38.998370] [ 38.998606] Last potentially related work creation: [ 38.999249] kasan_save_stack+0x22/0x50 [ 38.999803] __kasan_record_aux_stack+0x8e/0xa0 [ 39.000461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.001175] remove_vma+0x139/0x170 [ 39.001668] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.002289] do_vmi_munmap+0x1f1/0x2b0 [ 39.002825] __vm_munmap+0x138/0x3a0 [ 39.003334] __x64_sys_munmap+0x59/0x80 [ 39.003877] do_syscall_64+0x3f/0x90 [ 39.004421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.005162] [ 39.005404] The buggy address belongs to the object at ffff888019f620e8 [ 39.005404] which belongs to the cache vm_area_struct of size 168 [ 39.007086] The buggy address is located 88 bytes inside of [ 39.007086] freed 168-byte region [ffff888019f620e8, ffff888019f62190) [ 39.008712] [ 39.008955] The buggy address belongs to the physical page: [ 39.009706] page:000000003e6e18e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f62 [ 39.010943] memcg:ffff888018fccb01 [ 39.011419] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.012229] page_type: 0xffffffff() [ 39.012737] raw: 0100000000000200 ffff8880087a0c80 ffffea000036b800 dead000000000003 [ 39.013779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fccb01 [ 39.014813] page dumped because: kasan: bad access detected [ 39.015559] [ 39.015801] Memory state around the buggy address: [ 39.016473] ffff888019f62000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.017440] ffff888019f62080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.018414] >ffff888019f62100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.019376] ^ [ 39.020112] ffff888019f62180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.021081] ffff888019f62200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.022039] ================================================================== [ 39.023146] Disabling lock debugging due to kernel taint [ 41.029118] BUG: Bad rss-counter state mm:0000000040f365b8 type:MM_FILEPAGES val:33 [ 41.030121] BUG: Bad rss-counter state mm:0000000040f365b8 type:MM_ANONPAGES val:22 [ 41.514372] BUG: Bad rss-counter state mm:0000000037f5759d type:MM_FILEPAGES val:33 [ 41.515372] BUG: Bad rss-counter state mm:0000000037f5759d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57039' (ECDSA) to the list of known hosts. 2023/06/20 22:39:01 fuzzer started 2023/06/20 22:39:01 dialing manager at localhost:36067 2023/06/20 22:39:01 checking machine... 2023/06/20 22:39:01 checking revisions... [ 42.223899] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:39:01 testing simple program... [ 42.279044] cgroup: Unknown subsys name 'net' [ 42.331682] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:39:01 Registers: info registers vcpu 0 RAX=00000000000241b7 RBX=0000000000000001 RCX=ffffffff818cc02e RDX=00000000000241b7 RSI=0000000000008cc0 RDI=ffffffff8650ccf4 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000241b7 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff81130837 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 00007fc354bd0900 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=00007ffc64a5e000 CR3=0000000016f20000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007fa4d650a3b0 CR3=000000000d480000 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=6893e3914f4a9abf354fd816c9cdbe6e XMM02=000000000011b4f0ec2efd57dc4c00df XMM03=0000000000121eb05238093bb1167ebe XMM04=3043bb756bca4e5400000000000ae988 XMM05=d4494b0750d219f40000000000132ed8 XMM06=00c3ffa147b8d8570000000000132300 XMM07=e042d86d42eb936e0000000000122188 XMM08=5238093bb1167ebe000000000011b550 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000