syzkaller login: [ 23.994706] BUG: Bad rss-counter state mm:0000000033a5f7ac type:MM_FILEPAGES val:33 [ 23.995992] BUG: Bad rss-counter state mm:0000000033a5f7ac type:MM_ANONPAGES val:22 [ 24.041923] ================================================================== [ 24.043116] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.044307] Read of size 8 at addr ffff888019f4adf0 by task sshd/219 [ 24.045316] [ 24.045603] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.046738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.047946] Call Trace: [ 24.048325] [ 24.048737] dump_stack_lvl+0x91/0xf0 [ 24.049400] print_report+0xcc/0x620 [ 24.050055] ? __virt_addr_valid+0x102/0x340 [ 24.050811] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.051633] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.052456] kasan_report+0xbe/0xf0 [ 24.053095] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.053929] vma_interval_tree_remove+0xc75/0xec0 [ 24.054741] vma_prepare+0xc54/0x11a0 [ 24.055382] __split_vma+0x5af/0x950 [ 24.056018] ? __pfx___split_vma+0x10/0x10 [ 24.056716] ? find_held_lock+0x2c/0x110 [ 24.057415] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.058183] ? lock_is_held_type+0x9f/0x120 [ 24.058911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.059715] ? mtree_range_walk+0x632/0x900 [ 24.060451] ? mas_walk+0x5c7/0x7c0 [ 24.061094] do_vmi_munmap+0x1f1/0x2b0 [ 24.061748] mmap_region+0x1f9/0x2660 [ 24.062430] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.063125] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.064092] ? __pfx_lock_acquire+0x10/0x10 [ 24.064808] ? __pfx_mmap_region+0x10/0x10 [ 24.065528] ? security_mmap_addr+0x7d/0xa0 [ 24.066227] ? get_unmapped_area+0x1f5/0x3f0 [ 24.066786] do_mmap+0x854/0xf00 [ 24.067238] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.067748] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.068318] ksys_mmap_pgoff+0x3af/0x500 [ 24.068833] do_syscall_64+0x3f/0x90 [ 24.069319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.069994] RIP: 0033:0x7ff93165cd82 [ 24.070489] 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 [ 24.072639] RSP: 002b:00007ffe6ed63738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.073556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff93165cd82 [ 24.074452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff930a96000 [ 24.075319] RBP: 00007ff930a96000 R08: 0000000000000009 R09: 0000000000001000 [ 24.076175] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611d4965ec0 [ 24.077033] R13: 00007ffe6ed63750 R14: 00007ffe6ed63780 R15: 00007ffe6ed63ae0 [ 24.077915] [ 24.078228] [ 24.078445] Allocated by task 212: [ 24.078884] kasan_save_stack+0x22/0x50 [ 24.079391] kasan_set_track+0x25/0x30 [ 24.079886] __kasan_slab_alloc+0x59/0x70 [ 24.080417] kmem_cache_alloc+0x16b/0x370 [ 24.080938] vm_area_dup+0x20/0x160 [ 24.081399] __split_vma+0x170/0x950 [ 24.081870] split_vma+0xc6/0x110 [ 24.082320] mprotect_fixup+0x8d2/0xb30 [ 24.082830] do_mprotect_pkey+0x87e/0xd40 [ 24.083358] __x64_sys_mprotect+0x78/0xc0 [ 24.083885] do_syscall_64+0x3f/0x90 [ 24.084358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.085010] [ 24.085232] Freed by task 212: [ 24.085632] kasan_save_stack+0x22/0x50 [ 24.086154] kasan_set_track+0x25/0x30 [ 24.086655] kasan_save_free_info+0x2b/0x50 [ 24.087183] __kasan_slab_free+0x10a/0x190 [ 24.087719] kmem_cache_free+0x10d/0x4d0 [ 24.088235] rcu_core+0x8c8/0x2860 [ 24.088685] __do_softirq+0x1b7/0x7d4 [ 24.089171] [ 24.089384] Last potentially related work creation: [ 24.089981] kasan_save_stack+0x22/0x50 [ 24.090497] __kasan_record_aux_stack+0x8e/0xa0 [ 24.091079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.091731] remove_vma+0x139/0x170 [ 24.092197] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.092764] do_vmi_munmap+0x1f1/0x2b0 [ 24.093261] __vm_munmap+0x138/0x3a0 [ 24.093733] __x64_sys_munmap+0x59/0x80 [ 24.094244] do_syscall_64+0x3f/0x90 [ 24.094727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.095374] [ 24.095588] The buggy address belongs to the object at ffff888019f4ad98 [ 24.095588] which belongs to the cache vm_area_struct of size 168 [ 24.097069] The buggy address is located 88 bytes inside of [ 24.097069] freed 168-byte region [ffff888019f4ad98, ffff888019f4ae40) [ 24.098518] [ 24.098732] The buggy address belongs to the physical page: [ 24.099407] page:00000000c0725d4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f4a [ 24.100528] memcg:ffff88800c4b8c01 [ 24.100966] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.101631] page_type: 0xffffffff() [ 24.102104] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.103051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4b8c01 [ 24.103970] page dumped because: kasan: bad access detected [ 24.104645] [ 24.104869] Memory state around the buggy address: [ 24.105466] ffff888019f4ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.106334] ffff888019f4ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.107207] >ffff888019f4ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.108063] ^ [ 24.108870] ffff888019f4ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.109737] ffff888019f4ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.110613] ================================================================== [ 24.111813] Disabling lock debugging due to kernel taint [ 26.257988] BUG: Bad rss-counter state mm:0000000002c2983b type:MM_FILEPAGES val:33 [ 26.259002] BUG: Bad rss-counter state mm:0000000002c2983b type:MM_ANONPAGES val:22 [ 26.792337] BUG: Bad rss-counter state mm:0000000026ae0e86 type:MM_FILEPAGES val:33 [ 26.793570] BUG: Bad rss-counter state mm:0000000026ae0e86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27850' (ECDSA) to the list of known hosts. 2023/06/20 15:12:12 fuzzer started 2023/06/20 15:12:13 dialing manager at localhost:36067 2023/06/20 15:12:13 checking machine... 2023/06/20 15:12:13 checking revisions... [ 27.493802] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:12:13 testing simple program... [ 27.543619] cgroup: Unknown subsys name 'net' [ 27.585355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:12:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=ffff88800eed3680 RSI=ffffffff811431df RDI=0000000000000006 RBP=00000000187c2220 RSP=ffff888015f67ca8 R8 =0000000000000006 R9 =0000000000000003 R10=0000000000080000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000800 R14=0000000000000000 R15=ffffffff85d3e300 RIP=ffffffff81143387 RFL=00000256 [---ZAP-] 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 00007fc0aa20b900 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=00007fc0aa7c30b0 CR3=0000000019fa4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8615cec1 RBX=0000000000000001 RCX=ffffffff8615cebc RDX=0000000000000000 RSI=1ffffffff0c2b9d8 RDI=ffffffff85e1602c RBP=ffff88801474f5e0 RSP=ffff88801474f518 R8 =ffffffff8615cea4 R9 =ffff88801474f5c8 R10=0000000000038001 R11=0000000000026d9a R12=ffff88801474f5e8 R13=ffff88801474f5d0 R14=ffff88801474f5c9 R15=ffff88801474f588 RIP=ffffffff81130a5b RFL=00000216 [----AP-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcd3ce15900 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=00007fcd3c332000 CR3=000000000ca8c000 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=000000000010a2482fccd54c36d8a3f3 XMM01=00000000001198487e8a42789393c4b7 XMM02=0000000000119950eff9b2d0a8fce9cb XMM03=0000000000119a202c67c8bc2e329bc3 XMM04=12c3f88be041e3c600000000000ae988 XMM05=dfcdbad4f1609c370000000000130698 XMM06=806171799158d9670000000000130520 XMM07=e042d86d42eb936e0000000000120ac8 XMM08=e3d383a3706971170000000000119a20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000