syzkaller login: [ 31.142561] BUG: Bad rss-counter state mm:000000003432c830 type:MM_FILEPAGES val:33 [ 31.143740] BUG: Bad rss-counter state mm:000000003432c830 type:MM_ANONPAGES val:22 [ 31.257032] ================================================================== [ 31.257747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.258537] Read of size 8 at addr ffff888015dc8df0 by task sshd/220 [ 31.259160] [ 31.259327] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.260076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.260870] Call Trace: [ 31.261114] [ 31.261345] dump_stack_lvl+0x91/0xf0 [ 31.261782] print_report+0xcc/0x620 [ 31.262232] ? __virt_addr_valid+0x102/0x340 [ 31.262706] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263065] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263411] kasan_report+0xbe/0xf0 [ 31.263679] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.264031] vma_interval_tree_remove+0xc75/0xec0 [ 31.264396] vma_prepare+0xc54/0x11a0 [ 31.264719] __split_vma+0x5af/0x950 [ 31.264992] ? __pfx___split_vma+0x10/0x10 [ 31.265300] ? find_held_lock+0x2c/0x110 [ 31.265622] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.265966] ? lock_is_held_type+0x9f/0x120 [ 31.266312] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.266684] ? mtree_range_walk+0x632/0x900 [ 31.267019] ? mas_walk+0x5c7/0x7c0 [ 31.267309] do_vmi_munmap+0x1f1/0x2b0 [ 31.267635] mmap_region+0x1f9/0x2660 [ 31.267949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.268263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.268693] ? __pfx_lock_acquire+0x10/0x10 [ 31.269035] ? __pfx_mmap_region+0x10/0x10 [ 31.269400] ? security_mmap_addr+0x7d/0xa0 [ 31.269732] ? get_unmapped_area+0x1f5/0x3f0 [ 31.270075] do_mmap+0x854/0xf00 [ 31.270342] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.270669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.271020] ksys_mmap_pgoff+0x3af/0x500 [ 31.271325] do_syscall_64+0x3f/0x90 [ 31.271609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272025] RIP: 0033:0x7f4491f05d82 [ 31.272320] 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 [ 31.273678] RSP: 002b:00007ffeede62658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.274250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4491f05d82 [ 31.274789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f449133f000 [ 31.275332] RBP: 00007f449133f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.275849] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b75e1dec0 [ 31.276408] R13: 00007ffeede62670 R14: 00007ffeede626a0 R15: 00007ffeede62a00 [ 31.276927] [ 31.277105] [ 31.277234] Allocated by task 213: [ 31.277522] kasan_save_stack+0x22/0x50 [ 31.277845] kasan_set_track+0x25/0x30 [ 31.278148] __kasan_slab_alloc+0x59/0x70 [ 31.278466] kmem_cache_alloc+0x16b/0x370 [ 31.278792] vm_area_dup+0x20/0x160 [ 31.279108] __split_vma+0x170/0x950 [ 31.279388] split_vma+0xc6/0x110 [ 31.279661] mprotect_fixup+0x8d2/0xb30 [ 31.279967] do_mprotect_pkey+0x87e/0xd40 [ 31.280279] __x64_sys_mprotect+0x78/0xc0 [ 31.280628] do_syscall_64+0x3f/0x90 [ 31.280925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281308] [ 31.281452] Freed by task 213: [ 31.281696] kasan_save_stack+0x22/0x50 [ 31.282033] kasan_set_track+0x25/0x30 [ 31.282332] kasan_save_free_info+0x2b/0x50 [ 31.282651] __kasan_slab_free+0x10a/0x190 [ 31.282983] kmem_cache_free+0x10d/0x4d0 [ 31.283335] rcu_core+0x8c8/0x2860 [ 31.283604] __do_softirq+0x1b7/0x7d4 [ 31.283890] [ 31.284039] Last potentially related work creation: [ 31.284401] kasan_save_stack+0x22/0x50 [ 31.284739] __kasan_record_aux_stack+0x8e/0xa0 [ 31.285098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.285488] remove_vma+0x139/0x170 [ 31.285756] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.286129] do_vmi_munmap+0x1f1/0x2b0 [ 31.286445] __vm_munmap+0x138/0x3a0 [ 31.286723] __x64_sys_munmap+0x59/0x80 [ 31.287017] do_syscall_64+0x3f/0x90 [ 31.287328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287731] [ 31.287860] The buggy address belongs to the object at ffff888015dc8d98 [ 31.287860] which belongs to the cache vm_area_struct of size 168 [ 31.288782] The buggy address is located 88 bytes inside of [ 31.288782] freed 168-byte region [ffff888015dc8d98, ffff888015dc8e40) [ 31.289670] [ 31.289799] The buggy address belongs to the physical page: [ 31.290233] page:00000000e0a3197c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15dc8 [ 31.290903] memcg:ffff88800e073201 [ 31.291191] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.291657] page_type: 0xffffffff() [ 31.291977] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.292547] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e073201 [ 31.293110] page dumped because: kasan: bad access detected [ 31.293556] [ 31.293687] Memory state around the buggy address: [ 31.294054] ffff888015dc8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.294584] ffff888015dc8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.295139] >ffff888015dc8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.295659] ^ [ 31.296170] ffff888015dc8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.296703] ffff888015dc8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.297232] ================================================================== [ 31.297857] Disabling lock debugging due to kernel taint [ 33.339249] BUG: Bad rss-counter state mm:00000000c03bffe3 type:MM_FILEPAGES val:33 [ 33.340155] BUG: Bad rss-counter state mm:00000000c03bffe3 type:MM_ANONPAGES val:22 [ 33.872786] BUG: Bad rss-counter state mm:00000000a20f007e type:MM_FILEPAGES val:33 [ 33.873971] BUG: Bad rss-counter state mm:00000000a20f007e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57026' (ECDSA) to the list of known hosts. 2023/06/20 14:42:05 fuzzer started 2023/06/20 14:42:05 dialing manager at localhost:36067 2023/06/20 14:42:05 checking machine... 2023/06/20 14:42:05 checking revisions... [ 34.545324] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:42:06 testing simple program... [ 34.586492] cgroup: Unknown subsys name 'net' [ 34.657660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:42:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff8880102cf6a8 RSP=ffff8880102cf5e0 R8 =0000000000000001 R9 =ffffed1002059ec8 R10=ffff8880102cf647 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007fa4d94ac900 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=00007fa4d9a61650 CR3=000000000dcf4000 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=ffffffff86149139 RBX=0000000000000001 RCX=ffffffff86149134 RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85e08c8c RBP=ffff88800da7f508 RSP=ffff88800da7f440 R8 =ffffffff86149134 R9 =ffff88800da7f4f0 R10=0000000000038001 R11=00000000000238b2 R12=ffff88800da7f510 R13=ffff88800da7f4f8 R14=ffff88800da7f4f1 R15=ffff88800da7f4b0 RIP=ffffffff81130a7e 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe8f6548900 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=00007fe8f5a66000 CR3=000000000ca12000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=46d33d83d80eb14d00000000000ae988 XMM05=61a80f936ffb10440000000000132e58 XMM06=19e9129bd510f2350000000000131d10 XMM07=fb795ef6d65770560000000000121f30 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000