syzkaller login: [ 28.850675] BUG: Bad rss-counter state mm:000000008ef290ef type:MM_FILEPAGES val:33 [ 28.851910] BUG: Bad rss-counter state mm:000000008ef290ef type:MM_ANONPAGES val:22 [ 28.894676] ================================================================== [ 28.895827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.896830] Read of size 8 at addr ffff88801677bc20 by task sshd/221 [ 28.897665] [ 28.897898] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.898807] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.899853] Call Trace: [ 28.900194] [ 28.900494] dump_stack_lvl+0x91/0xf0 [ 28.901017] print_report+0xcc/0x620 [ 28.901536] ? __virt_addr_valid+0x102/0x340 [ 28.902117] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902772] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.903431] kasan_report+0xbe/0xf0 [ 28.903952] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904631] vma_interval_tree_remove+0xc75/0xec0 [ 28.905288] vma_prepare+0xc54/0x11a0 [ 28.905807] __split_vma+0x5af/0x950 [ 28.906326] ? __pfx___split_vma+0x10/0x10 [ 28.906907] ? find_held_lock+0x2c/0x110 [ 28.907474] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.908118] ? lock_is_held_type+0x9f/0x120 [ 28.908701] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.909362] ? mtree_range_walk+0x632/0x900 [ 28.909967] ? mas_walk+0x5c7/0x7c0 [ 28.910488] do_vmi_munmap+0x1f1/0x2b0 [ 28.911028] mmap_region+0x1f9/0x2660 [ 28.911583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.912151] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.912928] ? __pfx_lock_acquire+0x10/0x10 [ 28.913518] ? __pfx_mmap_region+0x10/0x10 [ 28.914100] ? security_mmap_addr+0x7d/0xa0 [ 28.914676] ? get_unmapped_area+0x1f5/0x3f0 [ 28.915277] do_mmap+0x854/0xf00 [ 28.915763] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.916306] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.916916] ksys_mmap_pgoff+0x3af/0x500 [ 28.917470] do_syscall_64+0x3f/0x90 [ 28.917996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.918700] RIP: 0033:0x7f537ebdbd82 [ 28.919197] 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 [ 28.921550] RSP: 002b:00007ffc6a4c70f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.922542] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f537ebdbd82 [ 28.923466] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f537e015000 [ 28.924399] RBP: 00007f537e015000 R08: 0000000000000009 R09: 0000000000001000 [ 28.925323] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c5bc9ecf60 [ 28.926252] R13: 00007ffc6a4c7110 R14: 00007ffc6a4c7140 R15: 00007ffc6a4c74a0 [ 28.927194] [ 28.927530] [ 28.927768] Allocated by task 214: [ 28.928241] kasan_save_stack+0x22/0x50 [ 28.928794] kasan_set_track+0x25/0x30 [ 28.929332] __kasan_slab_alloc+0x59/0x70 [ 28.929891] kmem_cache_alloc+0x16b/0x370 [ 28.930457] vm_area_dup+0x20/0x160 [ 28.930955] __split_vma+0x170/0x950 [ 28.931469] split_vma+0xc6/0x110 [ 28.931963] mprotect_fixup+0x8d2/0xb30 [ 28.932514] do_mprotect_pkey+0x87e/0xd40 [ 28.933084] __x64_sys_mprotect+0x78/0xc0 [ 28.933661] do_syscall_64+0x3f/0x90 [ 28.934188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.934887] [ 28.935122] Freed by task 214: [ 28.935556] kasan_save_stack+0x22/0x50 [ 28.936102] kasan_set_track+0x25/0x30 [ 28.936645] kasan_save_free_info+0x2b/0x50 [ 28.937221] __kasan_slab_free+0x10a/0x190 [ 28.937807] kmem_cache_free+0x10d/0x4d0 [ 28.938374] rcu_core+0x8c8/0x2860 [ 28.938863] __do_softirq+0x1b7/0x7d4 [ 28.939520] [ 28.939762] Last potentially related work creation: [ 28.940379] kasan_save_stack+0x22/0x50 [ 28.940926] __kasan_record_aux_stack+0x8e/0xa0 [ 28.941533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.942213] remove_vma+0x139/0x170 [ 28.942690] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.943284] do_vmi_munmap+0x1f1/0x2b0 [ 28.943802] __vm_munmap+0x138/0x3a0 [ 28.944301] __x64_sys_munmap+0x59/0x80 [ 28.944828] do_syscall_64+0x3f/0x90 [ 28.945334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.946024] [ 28.946254] The buggy address belongs to the object at ffff88801677bbc8 [ 28.946254] which belongs to the cache vm_area_struct of size 168 [ 28.947838] The buggy address is located 88 bytes inside of [ 28.947838] freed 168-byte region [ffff88801677bbc8, ffff88801677bc70) [ 28.949380] [ 28.949617] The buggy address belongs to the physical page: [ 28.950345] page:00000000c100b56c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1677b [ 28.951560] memcg:ffff8880144eec01 [ 28.952021] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.952726] page_type: 0xffffffff() [ 28.953225] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.954221] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144eec01 [ 28.955211] page dumped because: kasan: bad access detected [ 28.955947] [ 28.956187] Memory state around the buggy address: [ 28.956816] ffff88801677bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.957753] ffff88801677bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.958683] >ffff88801677bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.959619] ^ [ 28.960203] ffff88801677bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.961139] ffff88801677bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.962072] ================================================================== [ 28.963158] Disabling lock debugging due to kernel taint [ 30.907932] BUG: Bad rss-counter state mm:00000000580a7085 type:MM_FILEPAGES val:33 [ 30.909371] BUG: Bad rss-counter state mm:00000000580a7085 type:MM_ANONPAGES val:22 [ 31.404020] BUG: Bad rss-counter state mm:00000000e20b9a01 type:MM_FILEPAGES val:33 [ 31.405020] BUG: Bad rss-counter state mm:00000000e20b9a01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6817' (ECDSA) to the list of known hosts. 2023/06/21 06:36:24 fuzzer started 2023/06/21 06:36:25 dialing manager at localhost:36067 2023/06/21 06:36:25 checking machine... 2023/06/21 06:36:25 checking revisions... [ 32.072052] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:36:25 testing simple program... [ 32.107407] cgroup: Unknown subsys name 'net' [ 32.138452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:36:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ff1819874e0 CR3=000000001698c000 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=2034323a36333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a36333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800efdfa42 RCX=0000000000000000 RDX=ffff88800c959b40 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff88800efdf950 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800efdfa28 R13=0000000000000000 R14=00007fff3ef66690 R15=00007fff3ef66688 RIP=ffffffff814c0404 RFL=00040246 [---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 00007ff79d65f900 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=00007fff3ef67000 CR3=0000000016536000 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