syzkaller login: [ 30.752925] BUG: Bad rss-counter state mm:000000000b7de06b type:MM_FILEPAGES val:33 [ 30.754003] BUG: Bad rss-counter state mm:000000000b7de06b type:MM_ANONPAGES val:22 [ 30.938980] ================================================================== [ 30.939992] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.940994] Read of size 8 at addr ffff88800f2a4d08 by task sshd/220 [ 30.941912] [ 30.942140] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.943089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.944164] Call Trace: [ 30.944511] [ 30.944818] dump_stack_lvl+0x91/0xf0 [ 30.945347] print_report+0xcc/0x620 [ 30.945874] ? __virt_addr_valid+0x102/0x340 [ 30.946465] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947145] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947810] kasan_report+0xbe/0xf0 [ 30.948315] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948980] vma_interval_tree_remove+0xc75/0xec0 [ 30.949620] vma_prepare+0xc54/0x11a0 [ 30.950142] __split_vma+0x5af/0x950 [ 30.950643] ? __pfx___split_vma+0x10/0x10 [ 30.951244] ? find_held_lock+0x2c/0x110 [ 30.951811] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.952424] ? lock_is_held_type+0x9f/0x120 [ 30.952998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.953646] ? mtree_range_walk+0x632/0x900 [ 30.954234] ? mas_walk+0x5c7/0x7c0 [ 30.954739] do_vmi_munmap+0x1f1/0x2b0 [ 30.955299] mmap_region+0x1f9/0x2660 [ 30.955819] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.956365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.957157] ? __pfx_lock_acquire+0x10/0x10 [ 30.957762] ? __pfx_mmap_region+0x10/0x10 [ 30.958330] ? security_mmap_addr+0x7d/0xa0 [ 30.958909] ? get_unmapped_area+0x1f5/0x3f0 [ 30.959517] do_mmap+0x854/0xf00 [ 30.959984] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.960510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.961125] ksys_mmap_pgoff+0x3af/0x500 [ 30.961668] do_syscall_64+0x3f/0x90 [ 30.962183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.962868] RIP: 0033:0x7f071531cd82 [ 30.963364] 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 [ 30.965797] RSP: 002b:00007ffe610faf38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.966867] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f071531cd82 [ 30.967910] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0714756000 [ 30.968899] RBP: 00007f0714756000 R08: 0000000000000009 R09: 0000000000001000 [ 30.969917] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baf96cfec0 [ 30.970893] R13: 00007ffe610faf50 R14: 00007ffe610faf80 R15: 00007ffe610fb2e0 [ 30.971859] [ 30.972186] [ 30.972414] Allocated by task 213: [ 30.972870] kasan_save_stack+0x22/0x50 [ 30.973407] kasan_set_track+0x25/0x30 [ 30.973937] __kasan_slab_alloc+0x59/0x70 [ 30.974497] kmem_cache_alloc+0x16b/0x370 [ 30.975048] vm_area_dup+0x20/0x160 [ 30.975563] __split_vma+0x170/0x950 [ 30.976061] split_vma+0xc6/0x110 [ 30.976539] mprotect_fixup+0x8d2/0xb30 [ 30.977070] do_mprotect_pkey+0x87e/0xd40 [ 30.977624] __x64_sys_mprotect+0x78/0xc0 [ 30.978176] do_syscall_64+0x3f/0x90 [ 30.978690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.979382] [ 30.979611] Freed by task 213: [ 30.980037] kasan_save_stack+0x22/0x50 [ 30.980588] kasan_set_track+0x25/0x30 [ 30.981118] kasan_save_free_info+0x2b/0x50 [ 30.981696] __kasan_slab_free+0x10a/0x190 [ 30.982264] kmem_cache_free+0x10d/0x4d0 [ 30.982815] rcu_core+0x8c8/0x2860 [ 30.983305] __do_softirq+0x1b7/0x7d4 [ 30.983821] [ 30.984060] Last potentially related work creation: [ 30.984695] kasan_save_stack+0x22/0x50 [ 30.985234] __kasan_record_aux_stack+0x8e/0xa0 [ 30.985852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.986539] remove_vma+0x139/0x170 [ 30.987017] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.987625] do_vmi_munmap+0x1f1/0x2b0 [ 30.988141] __vm_munmap+0x138/0x3a0 [ 30.988644] __x64_sys_munmap+0x59/0x80 [ 30.989175] do_syscall_64+0x3f/0x90 [ 30.989681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.990365] [ 30.990595] The buggy address belongs to the object at ffff88800f2a4cb0 [ 30.990595] which belongs to the cache vm_area_struct of size 168 [ 30.992168] The buggy address is located 88 bytes inside of [ 30.992168] freed 168-byte region [ffff88800f2a4cb0, ffff88800f2a4d58) [ 30.993732] [ 30.993969] The buggy address belongs to the physical page: [ 30.994699] page:00000000566d0e89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2a4 [ 30.995912] memcg:ffff8880172d1c01 [ 30.996389] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.997112] page_type: 0xffffffff() [ 30.997613] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.998630] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880172d1c01 [ 30.999651] page dumped because: kasan: bad access detected [ 31.000381] [ 31.000619] Memory state around the buggy address: [ 31.001265] ffff88800f2a4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.002204] ffff88800f2a4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.003160] >ffff88800f2a4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.004112] ^ [ 31.004602] ffff88800f2a4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.005559] ffff88800f2a4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.006503] ================================================================== [ 31.007753] Disabling lock debugging due to kernel taint [ 32.933451] BUG: Bad rss-counter state mm:0000000070ff2542 type:MM_FILEPAGES val:33 [ 32.934697] BUG: Bad rss-counter state mm:0000000070ff2542 type:MM_ANONPAGES val:22 [ 33.320188] BUG: Bad rss-counter state mm:00000000f6528a5c type:MM_FILEPAGES val:33 [ 33.321183] BUG: Bad rss-counter state mm:00000000f6528a5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50749' (ECDSA) to the list of known hosts. 2023/06/19 13:08:35 fuzzer started 2023/06/19 13:08:36 dialing manager at localhost:44161 2023/06/19 13:08:36 checking machine... 2023/06/19 13:08:36 checking revisions... [ 34.021304] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:08:36 testing simple program... [ 34.063173] cgroup: Unknown subsys name 'net' [ 34.109829] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:08:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e87d806 RCX=1ffff11001d0faec RDX=0000000000000006 RSI=ffff888018e83e44 RDI=ffff88800e87d7fc RBP=0000000000000000 RSP=ffff88801461f990 R8 =0000000000000001 R9 =ffff88800e87d7fc R10=ffff88800e87d7b3 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800e87d80c R14=ffff88800e87d7fc R15=ffff88800e87d720 RIP=ffffffff844d2b8a RFL=00000297 [--S-APC] 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 00007ff250670900 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=00007fff076bf000 CR3=000000000e5f6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ff250c280b0 CR3=000000000df22000 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=2035333a38303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a38303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000