syzkaller login: [ 28.710826] BUG: Bad rss-counter state mm:00000000dc7e4375 type:MM_FILEPAGES val:33 [ 28.711840] BUG: Bad rss-counter state mm:00000000dc7e4375 type:MM_ANONPAGES val:22 [ 28.877896] ================================================================== [ 28.878798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.879726] Read of size 8 at addr ffff888017ef7228 by task sshd/219 [ 28.880492] [ 28.880705] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.881674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.882664] Call Trace: [ 28.882981] [ 28.883260] dump_stack_lvl+0x91/0xf0 [ 28.883773] print_report+0xcc/0x620 [ 28.884263] ? __virt_addr_valid+0x102/0x340 [ 28.884815] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.885430] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886051] kasan_report+0xbe/0xf0 [ 28.886520] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887125] vma_interval_tree_remove+0xc75/0xec0 [ 28.887725] vma_prepare+0xc54/0x11a0 [ 28.888202] __split_vma+0x5af/0x950 [ 28.888665] ? __pfx___split_vma+0x10/0x10 [ 28.889189] ? find_held_lock+0x2c/0x110 [ 28.889713] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.890295] ? lock_is_held_type+0x9f/0x120 [ 28.890843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.891451] ? mtree_range_walk+0x632/0x900 [ 28.892006] ? mas_walk+0x5c7/0x7c0 [ 28.892486] do_vmi_munmap+0x1f1/0x2b0 [ 28.892979] mmap_region+0x1f9/0x2660 [ 28.893457] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.893970] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.894681] ? __pfx_lock_acquire+0x10/0x10 [ 28.895220] ? __pfx_mmap_region+0x10/0x10 [ 28.895747] ? security_mmap_addr+0x7d/0xa0 [ 28.896274] ? get_unmapped_area+0x1f5/0x3f0 [ 28.896823] do_mmap+0x854/0xf00 [ 28.897261] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.897786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.898396] ksys_mmap_pgoff+0x3af/0x500 [ 28.898916] do_syscall_64+0x3f/0x90 [ 28.899402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.900057] RIP: 0033:0x7f36d128cd82 [ 28.900516] 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 [ 28.902709] RSP: 002b:00007ffd8990a1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.903627] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36d128cd82 [ 28.904491] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36d06c6000 [ 28.905369] RBP: 00007f36d06c6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.906231] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdbeccbec0 [ 28.907102] R13: 00007ffd8990a1c0 R14: 00007ffd8990a1f0 R15: 00007ffd8990a550 [ 28.907979] [ 28.908270] [ 28.908487] Allocated by task 212: [ 28.908926] kasan_save_stack+0x22/0x50 [ 28.909438] kasan_set_track+0x25/0x30 [ 28.909961] __kasan_slab_alloc+0x59/0x70 [ 28.910489] kmem_cache_alloc+0x16b/0x370 [ 28.911019] vm_area_dup+0x20/0x160 [ 28.911474] __split_vma+0x170/0x950 [ 28.911953] split_vma+0xc6/0x110 [ 28.912398] mprotect_fixup+0x8d2/0xb30 [ 28.912910] do_mprotect_pkey+0x87e/0xd40 [ 28.913437] __x64_sys_mprotect+0x78/0xc0 [ 28.913975] do_syscall_64+0x3f/0x90 [ 28.914461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915120] [ 28.915335] Freed by task 209: [ 28.915735] kasan_save_stack+0x22/0x50 [ 28.916237] kasan_set_track+0x25/0x30 [ 28.916745] kasan_save_free_info+0x2b/0x50 [ 28.917275] __kasan_slab_free+0x10a/0x190 [ 28.917815] kmem_cache_free+0x10d/0x4d0 [ 28.918359] rcu_core+0x8c8/0x2860 [ 28.918828] __do_softirq+0x1b7/0x7d4 [ 28.919318] [ 28.919541] Last potentially related work creation: [ 28.920145] kasan_save_stack+0x22/0x50 [ 28.920654] __kasan_record_aux_stack+0x8e/0xa0 [ 28.921247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.921906] remove_vma+0x139/0x170 [ 28.922364] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.922928] do_vmi_munmap+0x1f1/0x2b0 [ 28.923412] __vm_munmap+0x138/0x3a0 [ 28.923886] __x64_sys_munmap+0x59/0x80 [ 28.924397] do_syscall_64+0x3f/0x90 [ 28.924885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.925535] [ 28.925755] The buggy address belongs to the object at ffff888017ef71d0 [ 28.925755] which belongs to the cache vm_area_struct of size 168 [ 28.927252] The buggy address is located 88 bytes inside of [ 28.927252] freed 168-byte region [ffff888017ef71d0, ffff888017ef7278) [ 28.928677] [ 28.928899] The buggy address belongs to the physical page: [ 28.929565] page:00000000ab69bdc2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ef7 [ 28.930693] memcg:ffff88800e8e9a01 [ 28.931126] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.931789] page_type: 0xffffffff() [ 28.932253] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.933189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8e9a01 [ 28.934127] page dumped because: kasan: bad access detected [ 28.934807] [ 28.935027] Memory state around the buggy address: [ 28.935607] ffff888017ef7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.936478] ffff888017ef7180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.937348] >ffff888017ef7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.938223] ^ [ 28.938787] ffff888017ef7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.939656] ffff888017ef7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.940522] ================================================================== [ 28.941541] Disabling lock debugging due to kernel taint [ 30.749791] BUG: Bad rss-counter state mm:00000000c161b930 type:MM_FILEPAGES val:33 [ 30.750568] BUG: Bad rss-counter state mm:00000000c161b930 type:MM_ANONPAGES val:22 [ 31.169292] BUG: Bad rss-counter state mm:000000009af73835 type:MM_FILEPAGES val:33 [ 31.170083] BUG: Bad rss-counter state mm:000000009af73835 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47214' (ECDSA) to the list of known hosts. 2023/06/20 23:31:23 fuzzer started 2023/06/20 23:31:23 dialing manager at localhost:36067 2023/06/20 23:31:23 checking machine... 2023/06/20 23:31:23 checking revisions... [ 31.823105] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:31:23 testing simple program... [ 31.859007] cgroup: Unknown subsys name 'net' [ 31.895925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:31:23 Registers: info registers vcpu 0 RAX=0000000000000078 RBX=0000000000000000 RCX=0000000001ba4080 RDX=0000000000000000 RSI=0000000000092cc0 RDI=0000000001ba4040 RBP=ffff88800ec479b8 RSP=ffff88800ec47970 R8 =ffff88800e6a5980 R9 =000000000003de00 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffffffff8184725c RIP=ffffffff81807fee 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 00007fb3de5d1900 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=00007fb3deb890b0 CR3=000000000df46000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff8562bc80 RCX=0000000000000000 RDX=1ffffffff0ac5790 RSI=ffffffff813c5c43 RDI=ffffffff87b6c480 RBP=ffffffff87b6c480 RSP=ffff88806cf09c90 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=ffffffff8562bcb0 R13=ffffffff87b6c510 R14=176a81f11e5a2e00 R15=ffffffff87b6c4a8 RIP=ffffffff813c5c58 RFL=00000016 [----AP-] 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 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=00007f15e873f450 CR3=000000000cb70000 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=5820f6e374ec6da1ab4fd3e9dfa7ffdb XMM02=000000000011d2b8ec2efd57dc4c00df XMM03=00000000001218e08a5e8be676cf4a31 XMM04=8b50ca4ffcf5e87e00000000000ae988 XMM05=c098262034afbfbe0000000000132560 XMM06=806171799158d9670000000000131600 XMM07=e042d86d42eb936e0000000000121b60 XMM08=8a5e8be676cf4a31000000000011d318 XMM09=00000000000000000000000000000000 XMM10=20200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000