syzkaller login: [ 31.065683] BUG: Bad rss-counter state mm:000000000159d883 type:MM_FILEPAGES val:33 [ 31.067114] BUG: Bad rss-counter state mm:000000000159d883 type:MM_ANONPAGES val:22 [ 31.220839] ================================================================== [ 31.221934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.223070] Read of size 8 at addr ffff88800e60bdf0 by task sshd/221 [ 31.224183] [ 31.224452] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.225482] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.226611] Call Trace: [ 31.226952] [ 31.227257] dump_stack_lvl+0x91/0xf0 [ 31.227776] print_report+0xcc/0x620 [ 31.228299] ? __virt_addr_valid+0x102/0x340 [ 31.228887] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.229543] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.230197] kasan_report+0xbe/0xf0 [ 31.230709] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.231371] vma_interval_tree_remove+0xc75/0xec0 [ 31.232020] vma_prepare+0xc54/0x11a0 [ 31.232539] __split_vma+0x5af/0x950 [ 31.233049] ? __pfx___split_vma+0x10/0x10 [ 31.233627] ? find_held_lock+0x2c/0x110 [ 31.234193] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.234810] ? lock_is_held_type+0x9f/0x120 [ 31.235401] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.236078] ? mtree_range_walk+0x632/0x900 [ 31.236675] ? mas_walk+0x5c7/0x7c0 [ 31.237187] do_vmi_munmap+0x1f1/0x2b0 [ 31.237722] mmap_region+0x1f9/0x2660 [ 31.238248] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.238805] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.239584] ? __pfx_lock_acquire+0x10/0x10 [ 31.240170] ? __pfx_mmap_region+0x10/0x10 [ 31.240749] ? security_mmap_addr+0x7d/0xa0 [ 31.241329] ? get_unmapped_area+0x1f5/0x3f0 [ 31.241922] do_mmap+0x854/0xf00 [ 31.242403] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.242939] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.243554] ksys_mmap_pgoff+0x3af/0x500 [ 31.244120] do_syscall_64+0x3f/0x90 [ 31.244639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245338] RIP: 0033:0x7f324deaed82 [ 31.245827] 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 [ 31.248126] RSP: 002b:00007ffcd0e1f278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.249110] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f324deaed82 [ 31.250019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f324d2e8000 [ 31.250940] RBP: 00007f324d2e8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.251874] R10: 0000000000000812 R11: 0000000000000206 R12: 00005597727e9ec0 [ 31.252805] R13: 00007ffcd0e1f290 R14: 00007ffcd0e1f2c0 R15: 00007ffcd0e1f620 [ 31.253741] [ 31.254062] [ 31.254293] Allocated by task 214: [ 31.254756] kasan_save_stack+0x22/0x50 [ 31.255300] kasan_set_track+0x25/0x30 [ 31.255831] __kasan_slab_alloc+0x59/0x70 [ 31.256395] kmem_cache_alloc+0x16b/0x370 [ 31.256950] vm_area_dup+0x20/0x160 [ 31.257449] __split_vma+0x170/0x950 [ 31.257961] split_vma+0xc6/0x110 [ 31.258442] mprotect_fixup+0x8d2/0xb30 [ 31.258988] do_mprotect_pkey+0x87e/0xd40 [ 31.259554] __x64_sys_mprotect+0x78/0xc0 [ 31.260130] do_syscall_64+0x3f/0x90 [ 31.260642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.261333] [ 31.261560] Freed by task 214: [ 31.261987] kasan_save_stack+0x22/0x50 [ 31.262536] kasan_set_track+0x25/0x30 [ 31.263069] kasan_save_free_info+0x2b/0x50 [ 31.263649] __kasan_slab_free+0x10a/0x190 [ 31.264231] kmem_cache_free+0x10d/0x4d0 [ 31.264773] rcu_core+0x8c8/0x2860 [ 31.265356] __do_softirq+0x1b7/0x7d4 [ 31.265881] [ 31.266109] Last potentially related work creation: [ 31.266735] kasan_save_stack+0x22/0x50 [ 31.267276] __kasan_record_aux_stack+0x8e/0xa0 [ 31.267899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.268605] remove_vma+0x139/0x170 [ 31.269101] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.269698] do_vmi_munmap+0x1f1/0x2b0 [ 31.270217] __vm_munmap+0x138/0x3a0 [ 31.270721] __x64_sys_munmap+0x59/0x80 [ 31.271253] do_syscall_64+0x3f/0x90 [ 31.271758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272481] [ 31.272709] The buggy address belongs to the object at ffff88800e60bd98 [ 31.272709] which belongs to the cache vm_area_struct of size 168 [ 31.274302] The buggy address is located 88 bytes inside of [ 31.274302] freed 168-byte region [ffff88800e60bd98, ffff88800e60be40) [ 31.275792] [ 31.276030] The buggy address belongs to the physical page: [ 31.276740] page:00000000fadf35e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe60b [ 31.277883] memcg:ffff888016e6bb01 [ 31.278338] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.279021] page_type: 0xffffffff() [ 31.279501] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.280505] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e6bb01 [ 31.281473] page dumped because: kasan: bad access detected [ 31.282191] [ 31.282424] Memory state around the buggy address: [ 31.283043] ffff88800e60bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.283951] ffff88800e60bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.284877] >ffff88800e60bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.285800] ^ [ 31.286661] ffff88800e60be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.287588] ffff88800e60be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.288525] ================================================================== [ 31.289581] Disabling lock debugging due to kernel taint [ 33.669128] BUG: Bad rss-counter state mm:000000007ee0f02e type:MM_FILEPAGES val:33 [ 33.670124] BUG: Bad rss-counter state mm:000000007ee0f02e type:MM_ANONPAGES val:22 [ 34.169503] BUG: Bad rss-counter state mm:00000000d03a7af5 type:MM_FILEPAGES val:33 [ 34.170594] BUG: Bad rss-counter state mm:00000000d03a7af5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50427' (ECDSA) to the list of known hosts. 2023/06/20 22:06:34 fuzzer started 2023/06/20 22:06:34 dialing manager at localhost:36067 2023/06/20 22:06:34 checking machine... 2023/06/20 22:06:34 checking revisions... [ 34.890837] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:06:34 testing simple program... [ 34.929619] cgroup: Unknown subsys name 'net' [ 34.980186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:34 Registers: info registers vcpu 0 RAX=ffffffff813782f8 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e60 RDI=ffff88806ce09e60 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8613897a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09e68 R15=ffff88806ce09a98 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007fc3bbfa1900 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=00007fc3bb4bf000 CR3=000000000cb04000 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=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f73b0c791ef28c2300000000000ae988 XMM05=576d7c7b976da29f0000000000132cb0 XMM06=e4cb8bb95a7664b60000000000131b10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=8fd62d7b02a28700 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed1002d10f86 RSP=ffff888016887c20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806cf361a0 R13=ffffffff8183a42b R14=0000000000000cc0 R15=0000000000000001 RIP=ffffffff812d8a44 RFL=00000082 [--S----] 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 00007f37bbc7b900 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=00007fffc29b4000 CR3=0000000015b98000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000