syzkaller login: [ 32.246591] BUG: Bad rss-counter state mm:00000000099ebe23 type:MM_FILEPAGES val:33 [ 32.247809] BUG: Bad rss-counter state mm:00000000099ebe23 type:MM_ANONPAGES val:22 [ 32.389114] ================================================================== [ 32.390059] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.391007] Read of size 8 at addr ffff88800de12310 by task sshd/221 [ 32.391781] [ 32.392066] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.392947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.393955] Call Trace: [ 32.394292] [ 32.394572] dump_stack_lvl+0x91/0xf0 [ 32.395060] print_report+0xcc/0x620 [ 32.395534] ? __virt_addr_valid+0x102/0x340 [ 32.396085] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.396688] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.397295] kasan_report+0xbe/0xf0 [ 32.397771] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.398408] vma_interval_tree_remove+0xc75/0xec0 [ 32.399010] vma_prepare+0xc54/0x11a0 [ 32.399485] __split_vma+0x5af/0x950 [ 32.399950] ? __pfx___split_vma+0x10/0x10 [ 32.400472] ? find_held_lock+0x2c/0x110 [ 32.400991] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.401546] ? lock_is_held_type+0x9f/0x120 [ 32.402084] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.402685] ? mtree_range_walk+0x632/0x900 [ 32.403230] ? mas_walk+0x5c7/0x7c0 [ 32.403699] do_vmi_munmap+0x1f1/0x2b0 [ 32.404183] mmap_region+0x1f9/0x2660 [ 32.404666] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.405176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.405902] ? __pfx_lock_acquire+0x10/0x10 [ 32.406428] ? __pfx_mmap_region+0x10/0x10 [ 32.406953] ? security_mmap_addr+0x7d/0xa0 [ 32.407487] ? get_unmapped_area+0x1f5/0x3f0 [ 32.408030] do_mmap+0x854/0xf00 [ 32.408468] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.408951] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.409510] ksys_mmap_pgoff+0x3af/0x500 [ 32.410016] do_syscall_64+0x3f/0x90 [ 32.410484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.411121] RIP: 0033:0x7ff8c28dfd82 [ 32.411567] 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 [ 32.413654] RSP: 002b:00007ffecb89cd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.414561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8c28dfd82 [ 32.415402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8c1d19000 [ 32.416233] RBP: 00007ff8c1d19000 R08: 0000000000000009 R09: 0000000000001000 [ 32.417074] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e535998ec0 [ 32.417921] R13: 00007ffecb89cd50 R14: 00007ffecb89cd80 R15: 00007ffecb89d0e0 [ 32.418765] [ 32.419051] [ 32.419262] Allocated by task 214: [ 32.419683] kasan_save_stack+0x22/0x50 [ 32.420181] kasan_set_track+0x25/0x30 [ 32.420667] __kasan_slab_alloc+0x59/0x70 [ 32.421184] kmem_cache_alloc+0x16b/0x370 [ 32.421695] vm_area_dup+0x20/0x160 [ 32.422150] __split_vma+0x170/0x950 [ 32.422609] split_vma+0xc6/0x110 [ 32.423050] mprotect_fixup+0x8d2/0xb30 [ 32.423544] do_mprotect_pkey+0x87e/0xd40 [ 32.424055] __x64_sys_mprotect+0x78/0xc0 [ 32.424572] do_syscall_64+0x3f/0x90 [ 32.425043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.425675] [ 32.425917] Freed by task 19: [ 32.426297] kasan_save_stack+0x22/0x50 [ 32.426795] kasan_set_track+0x25/0x30 [ 32.427284] kasan_save_free_info+0x2b/0x50 [ 32.427810] __kasan_slab_free+0x10a/0x190 [ 32.428334] kmem_cache_free+0x10d/0x4d0 [ 32.428837] rcu_core+0x8c8/0x2860 [ 32.429281] __do_softirq+0x1b7/0x7d4 [ 32.429749] [ 32.429971] Last potentially related work creation: [ 32.430552] kasan_save_stack+0x22/0x50 [ 32.431055] __kasan_record_aux_stack+0x8e/0xa0 [ 32.431628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.432257] remove_vma+0x139/0x170 [ 32.432705] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.433338] do_vmi_munmap+0x1f1/0x2b0 [ 32.433836] __vm_munmap+0x138/0x3a0 [ 32.434305] __x64_sys_munmap+0x59/0x80 [ 32.434794] do_syscall_64+0x3f/0x90 [ 32.435270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.435908] [ 32.436125] Second to last potentially related work creation: [ 32.436797] kasan_save_stack+0x22/0x50 [ 32.437296] __kasan_record_aux_stack+0x8e/0xa0 [ 32.437871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.438502] remove_vma+0x139/0x170 [ 32.438949] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.439507] do_vmi_munmap+0x1f1/0x2b0 [ 32.439986] __vm_munmap+0x138/0x3a0 [ 32.440450] __x64_sys_munmap+0x59/0x80 [ 32.440939] do_syscall_64+0x3f/0x90 [ 32.441406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.442060] [ 32.442276] The buggy address belongs to the object at ffff88800de122b8 [ 32.442276] which belongs to the cache vm_area_struct of size 168 [ 32.443725] The buggy address is located 88 bytes inside of [ 32.443725] freed 168-byte region [ffff88800de122b8, ffff88800de12360) [ 32.445111] [ 32.445328] The buggy address belongs to the physical page: [ 32.445987] page:00000000f07f1b38 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde12 [ 32.447051] memcg:ffff88800de38e01 [ 32.447478] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.448167] page_type: 0xffffffff() [ 32.448608] raw: 0100000000000200 ffff88800879fc80 ffffea000038e4c0 dead000000000007 [ 32.449520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de38e01 [ 32.450427] page dumped because: kasan: bad access detected [ 32.451079] [ 32.451292] Memory state around the buggy address: [ 32.451865] ffff88800de12200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.452705] ffff88800de12280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.453550] >ffff88800de12300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.454403] ^ [ 32.454863] ffff88800de12380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.455710] ffff88800de12400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.456547] ================================================================== [ 32.457704] Disabling lock debugging due to kernel taint [ 34.719380] BUG: Bad rss-counter state mm:000000009dfdd1da type:MM_FILEPAGES val:33 [ 34.720389] BUG: Bad rss-counter state mm:000000009dfdd1da type:MM_ANONPAGES val:22 [ 35.135874] BUG: Bad rss-counter state mm:0000000096824551 type:MM_FILEPAGES val:33 [ 35.137291] BUG: Bad rss-counter state mm:0000000096824551 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12017' (ECDSA) to the list of known hosts. 2023/06/20 10:29:28 fuzzer started 2023/06/20 10:29:28 dialing manager at localhost:44161 2023/06/20 10:29:28 checking machine... 2023/06/20 10:29:28 checking revisions... [ 35.793361] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:29:28 testing simple program... [ 35.830291] cgroup: Unknown subsys name 'net' [ 35.873405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:29:26 Registers: info registers vcpu 0 RAX=1ffff1100d9c6a00 RBX=0000000000000005 RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000006 RSP=ffff88806ce09e68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff888019a69150 RIP=ffffffff813788fe RFL=00000216 [----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 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=00007fc0cc49b618 CR3=000000000e84c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b196c RDX=ffff88806cf09ae0 RSI=1ffff1100d9e135e RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff863b1970 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a8e5 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888016917e80 R15=ffff88806cf09a98 RIP=ffffffff811310a7 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 00007fc0cbee4900 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=00007ffeb3bff000 CR3=000000000e84c000 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=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