syzkaller login: [ 44.833965] BUG: Bad rss-counter state mm:00000000ef0ea498 type:MM_FILEPAGES val:33 [ 44.835271] BUG: Bad rss-counter state mm:00000000ef0ea498 type:MM_ANONPAGES val:22 [ 44.944309] ================================================================== [ 44.945020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.945771] Read of size 8 at addr ffff88800e699058 by task sshd/219 [ 44.946367] [ 44.946540] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.947210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.947968] Call Trace: [ 44.948213] <TASK> [ 44.948429] dump_stack_lvl+0x91/0xf0 [ 44.949003] print_report+0xcc/0x620 [ 44.949391] ? __virt_addr_valid+0x102/0x340 [ 44.949815] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.950289] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.950766] kasan_report+0xbe/0xf0 [ 44.951171] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.951699] vma_interval_tree_remove+0xc75/0xec0 [ 44.952148] vma_prepare+0xc54/0x11a0 [ 44.952493] __split_vma+0x5af/0x950 [ 44.952909] ? __pfx___split_vma+0x10/0x10 [ 44.953405] ? find_held_lock+0x2c/0x110 [ 44.953808] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.954300] ? lock_is_held_type+0x9f/0x120 [ 44.954639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.954971] ? mtree_range_walk+0x632/0x900 [ 44.955275] ? mas_walk+0x5c7/0x7c0 [ 44.955544] do_vmi_munmap+0x1f1/0x2b0 [ 44.955814] mmap_region+0x1f9/0x2660 [ 44.956079] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.956367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.956765] ? __pfx_lock_acquire+0x10/0x10 [ 44.957060] ? __pfx_mmap_region+0x10/0x10 [ 44.957356] ? security_mmap_addr+0x7d/0xa0 [ 44.957650] ? get_unmapped_area+0x1f5/0x3f0 [ 44.957956] do_mmap+0x854/0xf00 [ 44.958198] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.958480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.958795] ksys_mmap_pgoff+0x3af/0x500 [ 44.959072] do_syscall_64+0x3f/0x90 [ 44.959331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.959694] RIP: 0033:0x7fe217af3d82 [ 44.959945] 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 [ 44.961094] RSP: 002b:00007ffe6607bfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.961599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe217af3d82 [ 44.962060] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe216f2d000 [ 44.962517] RBP: 00007fe216f2d000 R08: 0000000000000009 R09: 0000000000001000 [ 44.962976] R10: 0000000000000812 R11: 0000000000000206 R12: 00005630da74cf60 [ 44.963437] R13: 00007ffe6607c000 R14: 00007ffe6607c030 R15: 00007ffe6607c390 [ 44.963898] </TASK> [ 44.964055] [ 44.964170] Allocated by task 212: [ 44.964407] kasan_save_stack+0x22/0x50 [ 44.964681] kasan_set_track+0x25/0x30 [ 44.964947] __kasan_slab_alloc+0x59/0x70 [ 44.965245] kmem_cache_alloc+0x16b/0x370 [ 44.965535] vm_area_dup+0x20/0x160 [ 44.965787] __split_vma+0x170/0x950 [ 44.966038] split_vma+0xc6/0x110 [ 44.966274] mprotect_fixup+0x8d2/0xb30 [ 44.966544] do_mprotect_pkey+0x87e/0xd40 [ 44.966828] __x64_sys_mprotect+0x78/0xc0 [ 44.967110] do_syscall_64+0x3f/0x90 [ 44.967366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.967720] [ 44.967836] Freed by task 210: [ 44.968053] kasan_save_stack+0x22/0x50 [ 44.968330] kasan_set_track+0x25/0x30 [ 44.968595] kasan_save_free_info+0x2b/0x50 [ 44.968883] __kasan_slab_free+0x10a/0x190 [ 44.969180] kmem_cache_free+0x10d/0x4d0 [ 44.969468] rcu_core+0x8c8/0x2860 [ 44.969712] __do_softirq+0x1b7/0x7d4 [ 44.969973] [ 44.970094] Last potentially related work creation: [ 44.970421] kasan_save_stack+0x22/0x50 [ 44.970705] __kasan_record_aux_stack+0x8e/0xa0 [ 44.971038] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.971408] remove_vma+0x139/0x170 [ 44.971660] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.971976] do_vmi_munmap+0x1f1/0x2b0 [ 44.972255] __vm_munmap+0x138/0x3a0 [ 44.972521] __x64_sys_munmap+0x59/0x80 [ 44.972813] do_syscall_64+0x3f/0x90 [ 44.973084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.973466] [ 44.973588] Second to last potentially related work creation: [ 44.973984] kasan_save_stack+0x22/0x50 [ 44.974269] __kasan_record_aux_stack+0x8e/0xa0 [ 44.974606] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.974978] remove_vma+0x139/0x170 [ 44.975243] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.975562] do_vmi_munmap+0x1f1/0x2b0 [ 44.975843] mmap_region+0x1f9/0x2660 [ 44.976121] do_mmap+0x854/0xf00 [ 44.976373] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.976655] ksys_mmap_pgoff+0x3af/0x500 [ 44.976950] do_syscall_64+0x3f/0x90 [ 44.977232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.977609] [ 44.977732] The buggy address belongs to the object at ffff88800e699000 [ 44.977732] which belongs to the cache vm_area_struct of size 168 [ 44.978591] The buggy address is located 88 bytes inside of [ 44.978591] freed 168-byte region [ffff88800e699000, ffff88800e6990a8) [ 44.979426] [ 44.979550] The buggy address belongs to the physical page: [ 44.979936] page:00000000565e461e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe699 [ 44.980589] memcg:ffff88800e0f2201 [ 44.980839] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.981229] page_type: 0xffffffff() [ 44.981499] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 44.982055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0f2201 [ 44.982588] page dumped because: kasan: bad access detected [ 44.982974] [ 44.983101] Memory state around the buggy address: [ 44.983443] ffff88800e698f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 44.983959] ffff88800e698f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.984471] >ffff88800e699000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.984983] ^ [ 44.985419] ffff88800e699080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 44.985928] ffff88800e699100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.986446] ================================================================== [ 44.986980] Disabling lock debugging due to kernel taint [ 47.531091] BUG: Bad rss-counter state mm:000000006a315de9 type:MM_FILEPAGES val:33 [ 47.532100] BUG: Bad rss-counter state mm:000000006a315de9 type:MM_ANONPAGES val:22 [ 48.014172] BUG: Bad rss-counter state mm:00000000435b9eab type:MM_FILEPAGES val:33 [ 48.015176] BUG: Bad rss-counter state mm:00000000435b9eab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22488' (ECDSA) to the list of known hosts. 2023/06/19 19:30:56 fuzzer started 2023/06/19 19:30:56 dialing manager at localhost:44161 2023/06/19 19:30:56 checking machine... 2023/06/19 19:30:56 checking revisions... [ 48.690427] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:30:56 testing simple program... [ 48.733181] cgroup: Unknown subsys name 'net' [ 48.770165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:30:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fb7ba9347f0 CR3=000000000e0ca000 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=2035353a30333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801a183680 RSI=ffffffff818c84d4 RDI=ffffffff81371069 RBP=ffff888019ff7a70 RSP=ffff88800fd5fd28 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888019ff7b78 R13=ffff888019ff7a78 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818c84d8 RFL=00000293 [--S-A-C] 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 00007f526e79b900 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=00007ffc1e828000 CR3=000000000d666000 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=6720646572637465733a4d41503d706f 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