syzkaller login: [ 38.876441] BUG: Bad rss-counter state mm:00000000bdf02833 type:MM_FILEPAGES val:33 [ 38.877621] BUG: Bad rss-counter state mm:00000000bdf02833 type:MM_ANONPAGES val:22 [ 38.916363] ================================================================== [ 38.917434] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.918369] Read of size 8 at addr ffff88800f6c8880 by task sshd/219 [ 38.919309] [ 38.919687] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.920550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.921521] Call Trace: [ 38.921848] [ 38.922135] dump_stack_lvl+0x91/0xf0 [ 38.922625] print_report+0xcc/0x620 [ 38.923111] ? __virt_addr_valid+0x102/0x340 [ 38.923690] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924305] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.924914] kasan_report+0xbe/0xf0 [ 38.925386] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.926011] vma_interval_tree_remove+0xc75/0xec0 [ 38.926609] vma_prepare+0xc54/0x11a0 [ 38.927086] __split_vma+0x5af/0x950 [ 38.927561] ? __pfx___split_vma+0x10/0x10 [ 38.928091] ? find_held_lock+0x2c/0x110 [ 38.928616] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.929185] ? lock_is_held_type+0x9f/0x120 [ 38.929723] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.930329] ? mtree_range_walk+0x632/0x900 [ 38.930884] ? mas_walk+0x5c7/0x7c0 [ 38.931366] do_vmi_munmap+0x1f1/0x2b0 [ 38.931867] mmap_region+0x1f9/0x2660 [ 38.932343] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.932851] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.933565] ? __pfx_lock_acquire+0x10/0x10 [ 38.934103] ? __pfx_mmap_region+0x10/0x10 [ 38.934634] ? security_mmap_addr+0x7d/0xa0 [ 38.935162] ? get_unmapped_area+0x1f5/0x3f0 [ 38.935724] do_mmap+0x854/0xf00 [ 38.936169] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.936665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.937224] ksys_mmap_pgoff+0x3af/0x500 [ 38.937730] do_syscall_64+0x3f/0x90 [ 38.938206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938863] RIP: 0033:0x7fd4d7bf4d82 [ 38.939319] 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 [ 38.941433] RSP: 002b:00007ffe268e8ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.942348] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4d7bf4d82 [ 38.943197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4d702e000 [ 38.944054] RBP: 00007fd4d702e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.944907] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557bb799ec0 [ 38.945747] R13: 00007ffe268e8cc0 R14: 00007ffe268e8cf0 R15: 00007ffe268e9050 [ 38.946604] [ 38.946897] [ 38.947110] Allocated by task 212: [ 38.947545] kasan_save_stack+0x22/0x50 [ 38.948045] kasan_set_track+0x25/0x30 [ 38.948540] __kasan_slab_alloc+0x59/0x70 [ 38.949061] kmem_cache_alloc+0x16b/0x370 [ 38.949574] vm_area_dup+0x20/0x160 [ 38.950031] __split_vma+0x170/0x950 [ 38.950497] split_vma+0xc6/0x110 [ 38.950936] mprotect_fixup+0x8d2/0xb30 [ 38.951437] do_mprotect_pkey+0x87e/0xd40 [ 38.951981] __x64_sys_mprotect+0x78/0xc0 [ 38.952503] do_syscall_64+0x3f/0x90 [ 38.952977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953629] [ 38.953846] Freed by task 212: [ 38.954233] kasan_save_stack+0x22/0x50 [ 38.954733] kasan_set_track+0x25/0x30 [ 38.955233] kasan_save_free_info+0x2b/0x50 [ 38.955775] __kasan_slab_free+0x10a/0x190 [ 38.956303] kmem_cache_free+0x10d/0x4d0 [ 38.956818] rcu_core+0x8c8/0x2860 [ 38.957262] __do_softirq+0x1b7/0x7d4 [ 38.957738] [ 38.957952] Last potentially related work creation: [ 38.958535] kasan_save_stack+0x22/0x50 [ 38.959040] __kasan_record_aux_stack+0x8e/0xa0 [ 38.959622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.960261] remove_vma+0x139/0x170 [ 38.960708] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.961363] do_vmi_munmap+0x1f1/0x2b0 [ 38.961848] __vm_munmap+0x138/0x3a0 [ 38.962316] __x64_sys_munmap+0x59/0x80 [ 38.962814] do_syscall_64+0x3f/0x90 [ 38.963290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963951] [ 38.964164] The buggy address belongs to the object at ffff88800f6c8828 [ 38.964164] which belongs to the cache vm_area_struct of size 168 [ 38.965623] The buggy address is located 88 bytes inside of [ 38.965623] freed 168-byte region [ffff88800f6c8828, ffff88800f6c88d0) [ 38.967020] [ 38.967236] The buggy address belongs to the physical page: [ 38.967903] page:00000000eb12e3a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6c8 [ 38.968981] memcg:ffff88800ea47301 [ 38.969403] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.970043] page_type: 0xffffffff() [ 38.970493] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.971407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea47301 [ 38.972328] page dumped because: kasan: bad access detected [ 38.972982] [ 38.973198] Memory state around the buggy address: [ 38.973768] ffff88800f6c8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.974616] ffff88800f6c8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.975479] >ffff88800f6c8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.976327] ^ [ 38.976743] ffff88800f6c8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.977592] ffff88800f6c8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.978447] ================================================================== [ 38.979370] Disabling lock debugging due to kernel taint [ 41.667465] BUG: Bad rss-counter state mm:000000002202257f type:MM_FILEPAGES val:33 [ 41.668677] BUG: Bad rss-counter state mm:000000002202257f type:MM_ANONPAGES val:22 [ 42.139682] BUG: Bad rss-counter state mm:00000000f80a666b type:MM_FILEPAGES val:33 [ 42.141082] BUG: Bad rss-counter state mm:00000000f80a666b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5522' (ECDSA) to the list of known hosts. 2023/06/20 22:07:29 fuzzer started 2023/06/20 22:07:29 dialing manager at localhost:36067 2023/06/20 22:07:29 checking machine... 2023/06/20 22:07:29 checking revisions... [ 42.875938] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:07:29 testing simple program... [ 42.918906] cgroup: Unknown subsys name 'net' [ 42.963999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000558d9312afa0 RCX=000000000000005f RDX=0000000000000014 RSI=0000558d9312c1e0 RDI=0000558d9312afd0 RBP=0000558d9312c1e0 RSP=00007ffdb16055f8 R8 =0000000000000000 R9 =000000000000001b R10=00007ffdb16053b7 R11=0000000000000000 R12=00007ffdb1605640 R13=0000558d93109ce0 R14=00007f862c9576f8 R15=0000558d9312c1e0 RIP=00007f862cea6314 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f862c957900 00000000 00000000 GS =0000 0000000000000000 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=00007f862cf0f0b0 CR3=000000000e0a2000 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=707465675f6c697475646f6d6d61705f XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000100 RBX=0000000000000000 RCX=0000000080000100 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffff8880164a55b4 RBP=0000000000000000 RSP=ffff88806cf09a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff88800cd67080 RIP=ffffffff814c0871 RFL=00000293 [--S-A-C] 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 00007fe84e965900 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=00007fe84dd99a10 CR3=000000000c538000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0fd712afd1bc078000000000000ae988 XMM05=fa6d9f4462ffa9b30000000000132e58 XMM06=4fda316b135da52b0000000000131c48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000