syzkaller login: [ 31.760186] BUG: Bad rss-counter state mm:000000002bd2f42a type:MM_FILEPAGES val:33 [ 31.761706] BUG: Bad rss-counter state mm:000000002bd2f42a type:MM_ANONPAGES val:22 [ 31.911593] ================================================================== [ 31.912751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.913949] Read of size 8 at addr ffff888015f124e0 by task sshd/221 [ 31.915062] [ 31.915339] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.916436] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.917666] Call Trace: [ 31.918067] [ 31.918456] dump_stack_lvl+0x91/0xf0 [ 31.919066] print_report+0xcc/0x620 [ 31.919611] ? __virt_addr_valid+0x102/0x340 [ 31.920235] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.920938] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.921638] kasan_report+0xbe/0xf0 [ 31.922176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.922889] vma_interval_tree_remove+0xc75/0xec0 [ 31.923574] vma_prepare+0xc54/0x11a0 [ 31.924118] __split_vma+0x5af/0x950 [ 31.924654] ? __pfx___split_vma+0x10/0x10 [ 31.925256] ? find_held_lock+0x2c/0x110 [ 31.925847] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.926507] ? lock_is_held_type+0x9f/0x120 [ 31.927118] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.927804] ? mtree_range_walk+0x632/0x900 [ 31.928419] ? mas_walk+0x5c7/0x7c0 [ 31.928951] do_vmi_munmap+0x1f1/0x2b0 [ 31.929504] mmap_region+0x1f9/0x2660 [ 31.930050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.930630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.931428] ? __pfx_lock_acquire+0x10/0x10 [ 31.932023] ? __pfx_mmap_region+0x10/0x10 [ 31.932624] ? security_mmap_addr+0x7d/0xa0 [ 31.933223] ? get_unmapped_area+0x1f5/0x3f0 [ 31.933839] do_mmap+0x854/0xf00 [ 31.934341] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.934898] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.935534] ksys_mmap_pgoff+0x3af/0x500 [ 31.936096] do_syscall_64+0x3f/0x90 [ 31.936623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.937335] RIP: 0033:0x7fd65a871d82 [ 31.937839] 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 [ 31.940167] RSP: 002b:00007ffc1c6af898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.941146] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd65a871d82 [ 31.942060] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd659cab000 [ 31.942985] RBP: 00007fd659cab000 R08: 0000000000000009 R09: 0000000000001000 [ 31.943901] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e08d9ffec0 [ 31.944816] R13: 00007ffc1c6af8b0 R14: 00007ffc1c6af8e0 R15: 00007ffc1c6afc40 [ 31.945758] [ 31.946083] [ 31.946337] Allocated by task 214: [ 31.946805] kasan_save_stack+0x22/0x50 [ 31.947350] kasan_set_track+0x25/0x30 [ 31.947887] __kasan_slab_alloc+0x59/0x70 [ 31.948454] kmem_cache_alloc+0x16b/0x370 [ 31.949017] vm_area_dup+0x20/0x160 [ 31.949505] __split_vma+0x170/0x950 [ 31.950019] split_vma+0xc6/0x110 [ 31.950506] mprotect_fixup+0x8d2/0xb30 [ 31.951048] do_mprotect_pkey+0x87e/0xd40 [ 31.951627] __x64_sys_mprotect+0x78/0xc0 [ 31.952204] do_syscall_64+0x3f/0x90 [ 31.952715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.953406] [ 31.953637] Freed by task 214: [ 31.954064] kasan_save_stack+0x22/0x50 [ 31.954623] kasan_set_track+0x25/0x30 [ 31.955161] kasan_save_free_info+0x2b/0x50 [ 31.955731] __kasan_slab_free+0x10a/0x190 [ 31.956309] kmem_cache_free+0x10d/0x4d0 [ 31.956884] rcu_core+0x8c8/0x2860 [ 31.957361] __do_softirq+0x1b7/0x7d4 [ 31.957884] [ 31.958124] Last potentially related work creation: [ 31.958781] kasan_save_stack+0x22/0x50 [ 31.959339] __kasan_record_aux_stack+0x8e/0xa0 [ 31.959977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.960692] remove_vma+0x139/0x170 [ 31.961190] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.961791] do_vmi_munmap+0x1f1/0x2b0 [ 31.962321] __vm_munmap+0x138/0x3a0 [ 31.962827] __x64_sys_munmap+0x59/0x80 [ 31.963357] do_syscall_64+0x3f/0x90 [ 31.963866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.964556] [ 31.964788] The buggy address belongs to the object at ffff888015f12488 [ 31.964788] which belongs to the cache vm_area_struct of size 168 [ 31.966396] The buggy address is located 88 bytes inside of [ 31.966396] freed 168-byte region [ffff888015f12488, ffff888015f12530) [ 31.967899] [ 31.968135] The buggy address belongs to the physical page: [ 31.968837] page:000000006c2bc825 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f12 [ 31.970045] memcg:ffff888015d61101 [ 31.970529] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.971240] page_type: 0xffffffff() [ 31.971735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.972762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d61101 [ 31.973773] page dumped because: kasan: bad access detected [ 31.974529] [ 31.974763] Memory state around the buggy address: [ 31.975401] ffff888015f12380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.976344] ffff888015f12400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.977286] >ffff888015f12480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.978235] ^ [ 31.979070] ffff888015f12500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.980010] ffff888015f12580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.980943] ================================================================== [ 31.982277] Disabling lock debugging due to kernel taint [ 33.992233] BUG: Bad rss-counter state mm:00000000a3aa89aa type:MM_FILEPAGES val:33 [ 33.993234] BUG: Bad rss-counter state mm:00000000a3aa89aa type:MM_ANONPAGES val:22 [ 34.498352] BUG: Bad rss-counter state mm:00000000772edfdf type:MM_FILEPAGES val:33 [ 34.499445] BUG: Bad rss-counter state mm:00000000772edfdf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49634' (ECDSA) to the list of known hosts. 2023/06/19 22:40:13 fuzzer started 2023/06/19 22:40:13 dialing manager at localhost:44161 2023/06/19 22:40:13 checking machine... 2023/06/19 22:40:13 checking revisions... [ 35.267649] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:40:13 testing simple program... [ 35.313910] cgroup: Unknown subsys name 'net' [ 35.369336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:40:11 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11001da0ed5 RSP=ffff88800ed07698 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff856c1d40 R13=ffffffff81807d9f R14=ffff888018378580 R15=ffffffff818470dc RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007f4c39c14900 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=00007f4c3a1c9650 CR3=0000000019e62000 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=00010928e9b12aa5 RBX=b3285ca56c489dff RCX=000000000000acf8 RDX=000000000010d038 RSI=0000000000000000 RDI=000055aa4cb30290 RBP=0000000000000011 RSP=00007ffe24af5250 R8 =00007ffe24af5300 R9 =00007ffe24af5308 R10=00007f01212bda68 R11=000000000052545f R12=000055aa4ca02ba3 R13=b3285ca56c489dff R14=000055aa4cb30290 R15=00007ffe24af5300 RIP=00007f012124c176 RFL=00000206 [-----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 00007f01206c8900 00000000 00000000 GS =0000 0000000000000000 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=00007f011facadf0 CR3=000000000a09a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=44fa1921146bf3fb00000000000ae988 XMM05=5357740557d11d270000000000135b38 XMM06=e4cb8bb95a7664b600000000001349d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000