syzkaller login: [ 30.745925] BUG: Bad rss-counter state mm:000000004be6537d type:MM_FILEPAGES val:33 [ 30.747568] BUG: Bad rss-counter state mm:000000004be6537d type:MM_ANONPAGES val:22 [ 30.927657] ================================================================== [ 30.928612] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.929556] Read of size 8 at addr ffff88800c6b7ed8 by task sshd/220 [ 30.930316] [ 30.930666] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.931531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.932490] Call Trace: [ 30.932893] <TASK> [ 30.933242] dump_stack_lvl+0x91/0xf0 [ 30.933822] print_report+0xcc/0x620 [ 30.934395] ? __virt_addr_valid+0x102/0x340 [ 30.935050] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.935800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936520] kasan_report+0xbe/0xf0 [ 30.937085] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.937844] vma_interval_tree_remove+0xc75/0xec0 [ 30.938593] vma_prepare+0xc54/0x11a0 [ 30.939198] __split_vma+0x5af/0x950 [ 30.939788] ? __pfx___split_vma+0x10/0x10 [ 30.940457] ? find_held_lock+0x2c/0x110 [ 30.941109] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.941840] ? lock_is_held_type+0x9f/0x120 [ 30.942377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.942978] ? mtree_range_walk+0x632/0x900 [ 30.943527] ? mas_walk+0x5c7/0x7c0 [ 30.944003] do_vmi_munmap+0x1f1/0x2b0 [ 30.944499] mmap_region+0x1f9/0x2660 [ 30.944979] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.945496] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.946213] ? __pfx_lock_acquire+0x10/0x10 [ 30.946743] ? __pfx_mmap_region+0x10/0x10 [ 30.947274] ? security_mmap_addr+0x7d/0xa0 [ 30.947797] ? get_unmapped_area+0x1f5/0x3f0 [ 30.948346] do_mmap+0x854/0xf00 [ 30.948782] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.949273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.949851] ksys_mmap_pgoff+0x3af/0x500 [ 30.950365] do_syscall_64+0x3f/0x90 [ 30.950850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.951513] RIP: 0033:0x7f3678ca6d82 [ 30.951975] 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 [ 30.954143] RSP: 002b:00007ffe986bfe18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.955061] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3678ca6d82 [ 30.955944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36780e0000 [ 30.956798] RBP: 00007f36780e0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.957682] R10: 0000000000000812 R11: 0000000000000206 R12: 000056548827bec0 [ 30.958541] R13: 00007ffe986bfe30 R14: 00007ffe986bfe60 R15: 00007ffe986c01c0 [ 30.959412] </TASK> [ 30.959707] [ 30.959928] Allocated by task 213: [ 30.960361] kasan_save_stack+0x22/0x50 [ 30.960873] kasan_set_track+0x25/0x30 [ 30.961377] __kasan_slab_alloc+0x59/0x70 [ 30.961899] kmem_cache_alloc+0x16b/0x370 [ 30.962410] vm_area_dup+0x20/0x160 [ 30.962869] __split_vma+0x170/0x950 [ 30.963339] split_vma+0xc6/0x110 [ 30.963788] mprotect_fixup+0x8d2/0xb30 [ 30.964296] do_mprotect_pkey+0x87e/0xd40 [ 30.964823] __x64_sys_mprotect+0x78/0xc0 [ 30.965353] do_syscall_64+0x3f/0x90 [ 30.965831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.966495] [ 30.966709] Freed by task 213: [ 30.967113] kasan_save_stack+0x22/0x50 [ 30.967616] kasan_set_track+0x25/0x30 [ 30.968121] kasan_save_free_info+0x2b/0x50 [ 30.968669] __kasan_slab_free+0x10a/0x190 [ 30.969213] kmem_cache_free+0x10d/0x4d0 [ 30.969743] rcu_core+0x8c8/0x2860 [ 30.970190] __do_softirq+0x1b7/0x7d4 [ 30.970673] [ 30.970896] Last potentially related work creation: [ 30.971602] kasan_save_stack+0x22/0x50 [ 30.972124] __kasan_record_aux_stack+0x8e/0xa0 [ 30.972718] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.973382] remove_vma+0x139/0x170 [ 30.973855] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.974422] do_vmi_munmap+0x1f1/0x2b0 [ 30.974911] __vm_munmap+0x138/0x3a0 [ 30.975389] __x64_sys_munmap+0x59/0x80 [ 30.975887] do_syscall_64+0x3f/0x90 [ 30.976359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977003] [ 30.977217] The buggy address belongs to the object at ffff88800c6b7e80 [ 30.977217] which belongs to the cache vm_area_struct of size 168 [ 30.978695] The buggy address is located 88 bytes inside of [ 30.978695] freed 168-byte region [ffff88800c6b7e80, ffff88800c6b7f28) [ 30.980101] [ 30.980321] The buggy address belongs to the physical page: [ 30.980985] page:0000000038bc7ce3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6b7 [ 30.982080] memcg:ffff88800ca73301 [ 30.982513] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.983171] page_type: 0xffffffff() [ 30.983624] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.984546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca73301 [ 30.985480] page dumped because: kasan: bad access detected [ 30.986147] [ 30.986366] Memory state around the buggy address: [ 30.986946] ffff88800c6b7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.987802] ffff88800c6b7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.988659] >ffff88800c6b7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.989527] ^ [ 30.990252] ffff88800c6b7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.991115] ffff88800c6b7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.991977] ================================================================== [ 30.992919] Disabling lock debugging due to kernel taint [ 33.255829] BUG: Bad rss-counter state mm:000000002b45094a type:MM_FILEPAGES val:33 [ 33.256808] BUG: Bad rss-counter state mm:000000002b45094a type:MM_ANONPAGES val:22 [ 33.709923] BUG: Bad rss-counter state mm:00000000a46b3511 type:MM_FILEPAGES val:33 [ 33.711411] BUG: Bad rss-counter state mm:00000000a46b3511 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47493' (ECDSA) to the list of known hosts. 2023/06/20 01:19:18 fuzzer started 2023/06/20 01:19:18 dialing manager at localhost:44161 2023/06/20 01:19:19 checking machine... 2023/06/20 01:19:19 checking revisions... [ 34.454198] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:19:19 testing simple program... [ 34.495868] cgroup: Unknown subsys name 'net' [ 34.538098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:19:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019db7cb0 RCX=0000000000000001 RDX=1ffff110033b6e93 RSI=ffff888019db7c80 RDI=ffff888019db7498 RBP=0000000000000000 RSP=ffff888019db7420 R8 =0000000000000001 R9 =ffff888019db74d0 R10=0000000000038001 R11=000000000008a85c R12=ffff888019db74f0 R13=ffff888019db74d8 R14=ffff888019db7c80 R15=ffff888019db7490 RIP=ffffffff81131c83 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 00007f597cabb900 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=000055f488046954 CR3=000000001831e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f98b9709160 CR3=000000000c9f8000 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=f893eaad45e4a4bf784d936bc1df5eed XMM02=ec2efd57dc4c00df000000000011fa88 XMM03=3afc101075c9b368000000000011fb58 XMM04=19da93febf1547aa00000000000ae988 XMM05=19e9129bd510f2350000000000133e00 XMM06=4fda316b135da52b0000000000133c88 XMM07=e042d86d42eb936e0000000000124518 XMM08=3afc101075c9b368000000000011fb58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000