syzkaller login: [ 31.703956] BUG: Bad rss-counter state mm:0000000059a39ee8 type:MM_FILEPAGES val:33 [ 31.704918] BUG: Bad rss-counter state mm:0000000059a39ee8 type:MM_ANONPAGES val:22 [ 31.865761] ================================================================== [ 31.866827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.868019] Read of size 8 at addr ffff88801a3dfd08 by task sshd/221 [ 31.869010] [ 31.869279] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.870337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.871337] Call Trace: [ 31.871636] [ 31.871907] dump_stack_lvl+0x91/0xf0 [ 31.872372] print_report+0xcc/0x620 [ 31.872834] ? __virt_addr_valid+0x102/0x340 [ 31.873361] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.874522] kasan_report+0xbe/0xf0 [ 31.874974] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875557] vma_interval_tree_remove+0xc75/0xec0 [ 31.876162] vma_prepare+0xc54/0x11a0 [ 31.876640] __split_vma+0x5af/0x950 [ 31.877116] ? __pfx___split_vma+0x10/0x10 [ 31.877637] ? find_held_lock+0x2c/0x110 [ 31.878158] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.878722] ? lock_is_held_type+0x9f/0x120 [ 31.879260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.879864] ? mtree_range_walk+0x632/0x900 [ 31.880416] ? mas_walk+0x5c7/0x7c0 [ 31.880892] do_vmi_munmap+0x1f1/0x2b0 [ 31.881411] mmap_region+0x1f9/0x2660 [ 31.881895] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.882405] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.883126] ? __pfx_lock_acquire+0x10/0x10 [ 31.883657] ? __pfx_mmap_region+0x10/0x10 [ 31.884192] ? security_mmap_addr+0x7d/0xa0 [ 31.884730] ? get_unmapped_area+0x1f5/0x3f0 [ 31.885288] do_mmap+0x854/0xf00 [ 31.885722] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.886213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.886784] ksys_mmap_pgoff+0x3af/0x500 [ 31.887300] do_syscall_64+0x3f/0x90 [ 31.887783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.888425] RIP: 0033:0x7f7df7551d82 [ 31.888878] 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 [ 31.891037] RSP: 002b:00007ffc546686b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.891966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7df7551d82 [ 31.892821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7df698b000 [ 31.893674] RBP: 00007f7df698b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.894528] R10: 0000000000000812 R11: 0000000000000206 R12: 000056504bb9aec0 [ 31.895382] R13: 00007ffc546686d0 R14: 00007ffc54668700 R15: 00007ffc54668a60 [ 31.896251] [ 31.896546] [ 31.896771] Allocated by task 214: [ 31.897203] kasan_save_stack+0x22/0x50 [ 31.897728] kasan_set_track+0x25/0x30 [ 31.898220] __kasan_slab_alloc+0x59/0x70 [ 31.898754] kmem_cache_alloc+0x16b/0x370 [ 31.899276] vm_area_dup+0x20/0x160 [ 31.899736] __split_vma+0x170/0x950 [ 31.900199] split_vma+0xc6/0x110 [ 31.900637] mprotect_fixup+0x8d2/0xb30 [ 31.901149] do_mprotect_pkey+0x87e/0xd40 [ 31.901670] __x64_sys_mprotect+0x78/0xc0 [ 31.902197] do_syscall_64+0x3f/0x90 [ 31.902669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.903318] [ 31.903539] Freed by task 214: [ 31.903935] kasan_save_stack+0x22/0x50 [ 31.904450] kasan_set_track+0x25/0x30 [ 31.904938] kasan_save_free_info+0x2b/0x50 [ 31.905479] __kasan_slab_free+0x10a/0x190 [ 31.906017] kmem_cache_free+0x10d/0x4d0 [ 31.906523] rcu_core+0x8c8/0x2860 [ 31.906970] __do_softirq+0x1b7/0x7d4 [ 31.907456] [ 31.907679] Last potentially related work creation: [ 31.908276] kasan_save_stack+0x22/0x50 [ 31.908791] __kasan_record_aux_stack+0x8e/0xa0 [ 31.909368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.910018] remove_vma+0x139/0x170 [ 31.910476] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.911032] do_vmi_munmap+0x1f1/0x2b0 [ 31.911514] __vm_munmap+0x138/0x3a0 [ 31.911991] __x64_sys_munmap+0x59/0x80 [ 31.912489] do_syscall_64+0x3f/0x90 [ 31.912964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.913604] [ 31.913824] The buggy address belongs to the object at ffff88801a3dfcb0 [ 31.913824] which belongs to the cache vm_area_struct of size 168 [ 31.915297] The buggy address is located 88 bytes inside of [ 31.915297] freed 168-byte region [ffff88801a3dfcb0, ffff88801a3dfd58) [ 31.916704] [ 31.916922] The buggy address belongs to the physical page: [ 31.917617] page:00000000fbeced17 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3df [ 31.918731] memcg:ffff88800d3d7a01 [ 31.919161] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.919815] page_type: 0xffffffff() [ 31.920269] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.921212] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3d7a01 [ 31.922119] page dumped because: kasan: bad access detected [ 31.922781] [ 31.922999] Memory state around the buggy address: [ 31.923585] ffff88801a3dfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.924446] ffff88801a3dfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.925310] >ffff88801a3dfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.926171] ^ [ 31.926615] ffff88801a3dfd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.927478] ffff88801a3dfe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.928342] ================================================================== [ 31.929572] Disabling lock debugging due to kernel taint [ 33.840731] BUG: Bad rss-counter state mm:00000000fe4a863d type:MM_FILEPAGES val:33 [ 33.841747] BUG: Bad rss-counter state mm:00000000fe4a863d type:MM_ANONPAGES val:22 [ 34.284149] BUG: Bad rss-counter state mm:00000000017c538a type:MM_FILEPAGES val:33 [ 34.285152] BUG: Bad rss-counter state mm:00000000017c538a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15541' (ECDSA) to the list of known hosts. 2023/06/20 20:06:53 fuzzer started 2023/06/20 20:06:53 dialing manager at localhost:36067 2023/06/20 20:06:53 checking machine... 2023/06/20 20:06:53 checking revisions... [ 35.006671] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:06:53 testing simple program... [ 35.064049] cgroup: Unknown subsys name 'net' [ 35.107487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:06:53 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=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=00007f13d2341690 CR3=0000000016928000 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=2032353a36303a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a36303a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016b377d0 RCX=ffffffff86138e01 RDX=1ffff11002d66efa RSI=ffffffff8180c705 RDI=ffff888016b377dc RBP=0000000000000001 RSP=ffff888016b376e8 R8 =ffffffff86138e90 R9 =ffff888016b37748 R10=0000000000038001 R11=0000000000020d8f R12=ffff888016b377d0 R13=0000000000000000 R14=ffff88801834b680 R15=0000000000000001 RIP=ffffffff813ad51f 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 00007f8a9c39c900 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=00007ffdcc28c000 CR3=000000000cb24000 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