syzkaller login: [ 30.781226] BUG: Bad rss-counter state mm:00000000ab1ec309 type:MM_FILEPAGES val:33 [ 30.782440] BUG: Bad rss-counter state mm:00000000ab1ec309 type:MM_ANONPAGES val:22 [ 30.941056] ================================================================== [ 30.941996] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.942950] Read of size 8 at addr ffff88800de1da50 by task sshd/218 [ 30.943720] [ 30.943944] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.944952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.945978] Call Trace: [ 30.946296] [ 30.946580] dump_stack_lvl+0x91/0xf0 [ 30.947072] print_report+0xcc/0x620 [ 30.947565] ? __virt_addr_valid+0x102/0x340 [ 30.948114] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.949377] kasan_report+0xbe/0xf0 [ 30.949854] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.950478] vma_interval_tree_remove+0xc75/0xec0 [ 30.951080] vma_prepare+0xc54/0x11a0 [ 30.951559] __split_vma+0x5af/0x950 [ 30.952031] ? __pfx___split_vma+0x10/0x10 [ 30.952564] ? find_held_lock+0x2c/0x110 [ 30.953083] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.953640] ? lock_is_held_type+0x9f/0x120 [ 30.954199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.954815] ? mtree_range_walk+0x632/0x900 [ 30.955372] ? mas_walk+0x5c7/0x7c0 [ 30.955849] do_vmi_munmap+0x1f1/0x2b0 [ 30.956346] mmap_region+0x1f9/0x2660 [ 30.956827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.957346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.958076] ? __pfx_lock_acquire+0x10/0x10 [ 30.958606] ? __pfx_mmap_region+0x10/0x10 [ 30.959133] ? security_mmap_addr+0x7d/0xa0 [ 30.959665] ? get_unmapped_area+0x1f5/0x3f0 [ 30.960224] do_mmap+0x854/0xf00 [ 30.960670] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.961164] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.961727] ksys_mmap_pgoff+0x3af/0x500 [ 30.962242] do_syscall_64+0x3f/0x90 [ 30.962721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.963365] RIP: 0033:0x7fc1cc5e5d82 [ 30.963819] 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 [ 30.965941] RSP: 002b:00007fff15039c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.966849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1cc5e5d82 [ 30.967691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1cba1f000 [ 30.968536] RBP: 00007fc1cba1f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.969387] R10: 0000000000000812 R11: 0000000000000206 R12: 000056267ffcff70 [ 30.970253] R13: 00007fff15039c70 R14: 00007fff15039ca0 R15: 00007fff1503a000 [ 30.971110] [ 30.971404] [ 30.971621] Allocated by task 211: [ 30.972044] kasan_save_stack+0x22/0x50 [ 30.972552] kasan_set_track+0x25/0x30 [ 30.973049] __kasan_slab_alloc+0x59/0x70 [ 30.973573] kmem_cache_alloc+0x16b/0x370 [ 30.974109] vm_area_dup+0x20/0x160 [ 30.974571] __split_vma+0x170/0x950 [ 30.975044] split_vma+0xc6/0x110 [ 30.975492] mprotect_fixup+0x8d2/0xb30 [ 30.975999] do_mprotect_pkey+0x87e/0xd40 [ 30.976535] __x64_sys_mprotect+0x78/0xc0 [ 30.977059] do_syscall_64+0x3f/0x90 [ 30.977538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.978186] [ 30.978402] Freed by task 211: [ 30.978800] kasan_save_stack+0x22/0x50 [ 30.979314] kasan_set_track+0x25/0x30 [ 30.979820] kasan_save_free_info+0x2b/0x50 [ 30.980366] __kasan_slab_free+0x10a/0x190 [ 30.980914] kmem_cache_free+0x10d/0x4d0 [ 30.981432] rcu_core+0x8c8/0x2860 [ 30.981896] __do_softirq+0x1b7/0x7d4 [ 30.982379] [ 30.982595] Last potentially related work creation: [ 30.983185] kasan_save_stack+0x22/0x50 [ 30.983693] __kasan_record_aux_stack+0x8e/0xa0 [ 30.984269] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.984920] remove_vma+0x139/0x170 [ 30.985380] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.985954] do_vmi_munmap+0x1f1/0x2b0 [ 30.986450] __vm_munmap+0x138/0x3a0 [ 30.986920] __x64_sys_munmap+0x59/0x80 [ 30.987430] do_syscall_64+0x3f/0x90 [ 30.987912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988556] [ 30.988775] The buggy address belongs to the object at ffff88800de1d9f8 [ 30.988775] which belongs to the cache vm_area_struct of size 168 [ 30.990292] The buggy address is located 88 bytes inside of [ 30.990292] freed 168-byte region [ffff88800de1d9f8, ffff88800de1daa0) [ 30.991727] [ 30.991944] The buggy address belongs to the physical page: [ 30.992608] page:00000000b95313a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde1d [ 30.993709] memcg:ffff888009896501 [ 30.994137] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.994859] page_type: 0xffffffff() [ 30.995314] raw: 0100000000000200 ffff88800879fc80 ffffea0000377080 dead000000000003 [ 30.996238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009896501 [ 30.997158] page dumped because: kasan: bad access detected [ 30.997842] [ 30.998063] Memory state around the buggy address: [ 30.998658] ffff88800de1d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.999523] ffff88800de1d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.000524] >ffff88800de1da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.001455] ^ [ 31.002190] ffff88800de1da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.003059] ffff88800de1db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.003919] ================================================================== [ 31.005046] Disabling lock debugging due to kernel taint [ 33.048359] BUG: Bad rss-counter state mm:000000005e5e5bbc type:MM_FILEPAGES val:33 [ 33.049469] BUG: Bad rss-counter state mm:000000005e5e5bbc type:MM_ANONPAGES val:22 [ 33.606644] BUG: Bad rss-counter state mm:00000000a5282c98 type:MM_FILEPAGES val:33 [ 33.607855] BUG: Bad rss-counter state mm:00000000a5282c98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58546' (ECDSA) to the list of known hosts. 2023/06/19 14:31:13 fuzzer started 2023/06/19 14:31:13 dialing manager at localhost:44161 2023/06/19 14:31:13 checking machine... 2023/06/19 14:31:13 checking revisions... [ 34.219305] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:31:13 testing simple program... [ 34.268109] cgroup: Unknown subsys name 'net' [ 34.334406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:31:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fbc5602 RCX=ffffffff818395f7 RDX=ffffea00005fdc80 RSI=0000000000000008 RDI=ffffea00005fdc80 RBP=ffffea00005fdc80 RSP=ffff8880147978c8 R8 =0000000000000000 R9 =fffff940000bfb90 R10=ffffea00005fdc87 R11=0000000000000000 R12=0000000000000001 R13=ffffea00005fdc80 R14=ffffea00005fdcb8 R15=ffffea00005fdc80 RIP=ffffffff81839604 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 00007f02d4fce900 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=00007ffe114ea818 CR3=000000000d658000 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=00000000000000000000000000000000 XMM01=00007fcf991c45100000563746d7e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86137dd2 RDX=1ffff11001ed4f3d RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800f6a7a40 RSP=ffff88800f6a7978 R8 =ffffffff86137dd6 R9 =ffff88800f6a7a28 R10=0000000000038001 R11=0000000000020f00 R12=ffff88800f6a7a48 R13=ffff88800f6a7a30 R14=ffff88800f6a7d58 R15=ffff88800f6a79e8 RIP=ffffffff81131271 RFL=00000212 [----A--] 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 00007fe3c90a2900 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=0000559110cc1768 CR3=000000000ee7a000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000