syzkaller login: [ 32.072379] BUG: Bad rss-counter state mm:00000000bd36c718 type:MM_FILEPAGES val:33 [ 32.073966] BUG: Bad rss-counter state mm:00000000bd36c718 type:MM_ANONPAGES val:22 [ 32.215798] ================================================================== [ 32.216497] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.217220] Read of size 8 at addr ffff888015a07c20 by task sshd/221 [ 32.217830] [ 32.217996] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.218801] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.219544] Call Trace: [ 32.219785] [ 32.220004] dump_stack_lvl+0x91/0xf0 [ 32.220383] print_report+0xcc/0x620 [ 32.220753] ? __virt_addr_valid+0x102/0x340 [ 32.221188] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.221659] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.222145] kasan_report+0xbe/0xf0 [ 32.222509] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.222984] vma_interval_tree_remove+0xc75/0xec0 [ 32.223443] vma_prepare+0xc54/0x11a0 [ 32.223812] __split_vma+0x5af/0x950 [ 32.224172] ? __pfx___split_vma+0x10/0x10 [ 32.224572] ? find_held_lock+0x2c/0x110 [ 32.224973] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.225405] ? lock_is_held_type+0x9f/0x120 [ 32.225836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.226302] ? mtree_range_walk+0x632/0x900 [ 32.226724] ? mas_walk+0x5c7/0x7c0 [ 32.227085] do_vmi_munmap+0x1f1/0x2b0 [ 32.227464] mmap_region+0x1f9/0x2660 [ 32.227832] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.228220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.228762] ? __pfx_lock_acquire+0x10/0x10 [ 32.229169] ? __pfx_mmap_region+0x10/0x10 [ 32.229576] ? security_mmap_addr+0x7d/0xa0 [ 32.229999] ? get_unmapped_area+0x1f5/0x3f0 [ 32.230420] do_mmap+0x854/0xf00 [ 32.230770] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.231067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.231409] ksys_mmap_pgoff+0x3af/0x500 [ 32.231724] do_syscall_64+0x3f/0x90 [ 32.232010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.232402] RIP: 0033:0x7f79999acd82 [ 32.232683] 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 [ 32.234019] RSP: 002b:00007ffe554366a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.234581] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79999acd82 [ 32.235106] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7998de6000 [ 32.235633] RBP: 00007f7998de6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.236163] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e01b0aeec0 [ 32.236690] R13: 00007ffe554366c0 R14: 00007ffe554366f0 R15: 00007ffe55436a50 [ 32.237222] [ 32.237401] [ 32.237529] Allocated by task 214: [ 32.237802] kasan_save_stack+0x22/0x50 [ 32.238102] kasan_set_track+0x25/0x30 [ 32.238401] __kasan_slab_alloc+0x59/0x70 [ 32.238722] kmem_cache_alloc+0x16b/0x370 [ 32.239039] vm_area_dup+0x20/0x160 [ 32.239315] __split_vma+0x170/0x950 [ 32.239602] split_vma+0xc6/0x110 [ 32.239869] mprotect_fixup+0x8d2/0xb30 [ 32.240174] do_mprotect_pkey+0x87e/0xd40 [ 32.240494] __x64_sys_mprotect+0x78/0xc0 [ 32.240814] do_syscall_64+0x3f/0x90 [ 32.241107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.241489] [ 32.241621] Freed by task 204: [ 32.241881] kasan_save_stack+0x22/0x50 [ 32.242182] kasan_set_track+0x25/0x30 [ 32.242485] kasan_save_free_info+0x2b/0x50 [ 32.242808] __kasan_slab_free+0x10a/0x190 [ 32.243132] kmem_cache_free+0x10d/0x4d0 [ 32.243442] rcu_core+0x8c8/0x2860 [ 32.243723] __do_softirq+0x1b7/0x7d4 [ 32.244019] [ 32.244150] Last potentially related work creation: [ 32.244511] kasan_save_stack+0x22/0x50 [ 32.244820] __kasan_record_aux_stack+0x8e/0xa0 [ 32.245175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.245566] remove_vma+0x139/0x170 [ 32.245843] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.246182] do_vmi_munmap+0x1f1/0x2b0 [ 32.246477] __vm_munmap+0x138/0x3a0 [ 32.246763] __x64_sys_munmap+0x59/0x80 [ 32.247072] do_syscall_64+0x3f/0x90 [ 32.247360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.247754] [ 32.247886] The buggy address belongs to the object at ffff888015a07bc8 [ 32.247886] which belongs to the cache vm_area_struct of size 168 [ 32.248795] The buggy address is located 88 bytes inside of [ 32.248795] freed 168-byte region [ffff888015a07bc8, ffff888015a07c70) [ 32.249664] [ 32.249805] The buggy address belongs to the physical page: [ 32.250214] page:000000007bb14621 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a07 [ 32.250888] memcg:ffff88800fde8801 [ 32.251151] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.251544] page_type: 0xffffffff() [ 32.251810] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.252370] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fde8801 [ 32.252932] page dumped because: kasan: bad access detected [ 32.253331] [ 32.253458] Memory state around the buggy address: [ 32.253825] ffff888015a07b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.254346] ffff888015a07b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.254876] >ffff888015a07c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.255409] ^ [ 32.255735] ffff888015a07c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.256265] ffff888015a07d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.256796] ================================================================== [ 32.257360] Disabling lock debugging due to kernel taint [ 34.090673] BUG: Bad rss-counter state mm:00000000eb875fab type:MM_FILEPAGES val:33 [ 34.092200] BUG: Bad rss-counter state mm:00000000eb875fab type:MM_ANONPAGES val:22 [ 34.622628] BUG: Bad rss-counter state mm:000000005ae41380 type:MM_FILEPAGES val:33 [ 34.623820] BUG: Bad rss-counter state mm:000000005ae41380 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39870' (ECDSA) to the list of known hosts. 2023/06/20 02:38:47 fuzzer started 2023/06/20 02:38:48 dialing manager at localhost:44161 2023/06/20 02:38:48 checking machine... 2023/06/20 02:38:48 checking revisions... [ 35.256270] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:38:48 testing simple program... [ 35.308982] cgroup: Unknown subsys name 'net' [ 35.357899] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:38:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11001b75e8b RSP=ffff88800dbaf448 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=00000000000000e8 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 00007fd106a54900 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=00007ffd65f16000 CR3=0000000009650000 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=00007fbcc4e9cb70 CR3=000000000e33c000 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=2037343a38333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a38333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000