syzkaller login: [ 60.249386] BUG: Bad rss-counter state mm:000000002ca09226 type:MM_FILEPAGES val:33 [ 60.250661] BUG: Bad rss-counter state mm:000000002ca09226 type:MM_ANONPAGES val:22 [ 60.469249] ================================================================== [ 60.470168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.471294] Read of size 8 at addr ffff88800b913880 by task sshd/219 [ 60.472065] [ 60.472288] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.473162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.474195] Call Trace: [ 60.474514] [ 60.474798] dump_stack_lvl+0x91/0xf0 [ 60.475300] print_report+0xcc/0x620 [ 60.475776] ? __virt_addr_valid+0x102/0x340 [ 60.476346] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.476983] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.477604] kasan_report+0xbe/0xf0 [ 60.478084] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.478712] vma_interval_tree_remove+0xc75/0xec0 [ 60.479334] vma_prepare+0xc54/0x11a0 [ 60.479820] __split_vma+0x5af/0x950 [ 60.480314] ? __pfx___split_vma+0x10/0x10 [ 60.480859] ? find_held_lock+0x2c/0x110 [ 60.481392] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.481983] ? lock_is_held_type+0x9f/0x120 [ 60.482544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.483154] ? mtree_range_walk+0x632/0x900 [ 60.483718] ? mas_walk+0x5c7/0x7c0 [ 60.484204] do_vmi_munmap+0x1f1/0x2b0 [ 60.484707] mmap_region+0x1f9/0x2660 [ 60.485206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.485716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.486459] ? __pfx_lock_acquire+0x10/0x10 [ 60.486992] ? __pfx_mmap_region+0x10/0x10 [ 60.487523] ? security_mmap_addr+0x7d/0xa0 [ 60.488053] ? get_unmapped_area+0x1f5/0x3f0 [ 60.488608] do_mmap+0x854/0xf00 [ 60.489045] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.489545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.490113] ksys_mmap_pgoff+0x3af/0x500 [ 60.490643] do_syscall_64+0x3f/0x90 [ 60.491129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.491775] RIP: 0033:0x7f4478b27d82 [ 60.492243] 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 [ 60.494369] RSP: 002b:00007ffe4cd1fd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.495294] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4478b27d82 [ 60.496160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4477f61000 [ 60.497010] RBP: 00007f4477f61000 R08: 0000000000000009 R09: 0000000000001000 [ 60.497867] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d52f346b20 [ 60.498746] R13: 00007ffe4cd1fd50 R14: 00007ffe4cd1fd80 R15: 00007ffe4cd200e0 [ 60.499613] [ 60.499909] [ 60.500125] Allocated by task 212: [ 60.500550] kasan_save_stack+0x22/0x50 [ 60.501058] kasan_set_track+0x25/0x30 [ 60.501549] __kasan_slab_alloc+0x59/0x70 [ 60.502075] kmem_cache_alloc+0x16b/0x370 [ 60.502610] vm_area_dup+0x20/0x160 [ 60.503067] __split_vma+0x170/0x950 [ 60.503529] split_vma+0xc6/0x110 [ 60.503970] mprotect_fixup+0x8d2/0xb30 [ 60.504477] do_mprotect_pkey+0x87e/0xd40 [ 60.505004] __x64_sys_mprotect+0x78/0xc0 [ 60.505525] do_syscall_64+0x3f/0x90 [ 60.506013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.506671] [ 60.506893] Freed by task 47: [ 60.507283] kasan_save_stack+0x22/0x50 [ 60.507794] kasan_set_track+0x25/0x30 [ 60.508285] kasan_save_free_info+0x2b/0x50 [ 60.508823] __kasan_slab_free+0x10a/0x190 [ 60.509360] kmem_cache_free+0x10d/0x4d0 [ 60.509864] rcu_core+0x8c8/0x2860 [ 60.510324] __do_softirq+0x1b7/0x7d4 [ 60.510800] [ 60.511016] Last potentially related work creation: [ 60.511702] kasan_save_stack+0x22/0x50 [ 60.512207] __kasan_record_aux_stack+0x8e/0xa0 [ 60.512783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.513428] remove_vma+0x139/0x170 [ 60.513881] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.514467] do_vmi_munmap+0x1f1/0x2b0 [ 60.514955] __vm_munmap+0x138/0x3a0 [ 60.515422] __x64_sys_munmap+0x59/0x80 [ 60.515920] do_syscall_64+0x3f/0x90 [ 60.516396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.517042] [ 60.517261] Second to last potentially related work creation: [ 60.517944] kasan_save_stack+0x22/0x50 [ 60.518458] __kasan_record_aux_stack+0x8e/0xa0 [ 60.519031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.519671] remove_vma+0x139/0x170 [ 60.520137] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.520694] do_vmi_munmap+0x1f1/0x2b0 [ 60.521183] mmap_region+0x1f9/0x2660 [ 60.521664] do_mmap+0x854/0xf00 [ 60.522103] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.522605] ksys_mmap_pgoff+0x7d/0x500 [ 60.523098] do_syscall_64+0x3f/0x90 [ 60.523573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.524218] [ 60.524436] The buggy address belongs to the object at ffff88800b913828 [ 60.524436] which belongs to the cache vm_area_struct of size 168 [ 60.525924] The buggy address is located 88 bytes inside of [ 60.525924] freed 168-byte region [ffff88800b913828, ffff88800b9138d0) [ 60.527341] [ 60.527557] The buggy address belongs to the physical page: [ 60.528218] page:0000000056320520 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb913 [ 60.529309] memcg:ffff88800c6cbf01 [ 60.529739] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.530392] page_type: 0xffffffff() [ 60.530842] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381740 dead00000000000c [ 60.531760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6cbf01 [ 60.532681] page dumped because: kasan: bad access detected [ 60.533344] [ 60.533560] Memory state around the buggy address: [ 60.534141] ffff88800b913780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 60.535023] ffff88800b913800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 60.535880] >ffff88800b913880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 60.536734] ^ [ 60.537155] ffff88800b913900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.538006] ffff88800b913980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 60.538871] ================================================================== [ 60.539788] Disabling lock debugging due to kernel taint [ 62.539192] BUG: Bad rss-counter state mm:000000009d8c348a type:MM_FILEPAGES val:33 [ 62.540348] BUG: Bad rss-counter state mm:000000009d8c348a type:MM_ANONPAGES val:22 [ 62.926030] BUG: Bad rss-counter state mm:0000000092cc3936 type:MM_FILEPAGES val:33 [ 62.927535] BUG: Bad rss-counter state mm:0000000092cc3936 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32887' (ECDSA) to the list of known hosts. 2023/06/20 22:38:27 fuzzer started 2023/06/20 22:38:27 dialing manager at localhost:36067 2023/06/20 22:38:27 checking machine... 2023/06/20 22:38:27 checking revisions... [ 63.654677] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:38:27 testing simple program... [ 63.708340] cgroup: Unknown subsys name 'net' [ 63.761291] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:38:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880161a2ae0 RCX=ffffffff8196cee5 RDX=ffff888015b951c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880161a2b40 RSP=ffff888019e97780 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000005 R11=0000000000000000 R12=0000000000000005 R13=0000000000000ab9 R14=ffff888019182068 R15=ffff888019e978d0 RIP=ffffffff814c0860 RFL=00000206 [-----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 00007f5cfe262700 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=00007f8402ee3dc0 CR3=000000000e220000 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=2037323a38333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a38333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11001f8df8e RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800fc6fc60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-PC] 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 00007f2dd646c900 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=000055f895ef8f40 CR3=000000001a3bc000 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=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