syzkaller login: [ 31.376033] BUG: Bad rss-counter state mm:000000001ef63eea type:MM_FILEPAGES val:33 [ 31.377432] BUG: Bad rss-counter state mm:000000001ef63eea type:MM_ANONPAGES val:22 [ 31.418950] ================================================================== [ 31.419856] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.420801] Read of size 8 at addr ffff88800fde4140 by task sshd/220 [ 31.421566] [ 31.421957] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.422855] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.423840] Call Trace: [ 31.424176] [ 31.424458] dump_stack_lvl+0x91/0xf0 [ 31.424960] print_report+0xcc/0x620 [ 31.425449] ? __virt_addr_valid+0x102/0x340 [ 31.426006] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.426631] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.427257] kasan_report+0xbe/0xf0 [ 31.427739] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.428364] vma_interval_tree_remove+0xc75/0xec0 [ 31.428979] vma_prepare+0xc54/0x11a0 [ 31.429458] __split_vma+0x5af/0x950 [ 31.429936] ? __pfx___split_vma+0x10/0x10 [ 31.430477] ? find_held_lock+0x2c/0x110 [ 31.430995] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.431565] ? lock_is_held_type+0x9f/0x120 [ 31.432115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.432743] ? mtree_range_walk+0x632/0x900 [ 31.433319] ? mas_walk+0x5c7/0x7c0 [ 31.433805] do_vmi_munmap+0x1f1/0x2b0 [ 31.434297] mmap_region+0x1f9/0x2660 [ 31.434789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.435319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.436040] ? __pfx_lock_acquire+0x10/0x10 [ 31.436590] ? __pfx_mmap_region+0x10/0x10 [ 31.437141] ? security_mmap_addr+0x7d/0xa0 [ 31.437691] ? get_unmapped_area+0x1f5/0x3f0 [ 31.438267] do_mmap+0x854/0xf00 [ 31.438705] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.439203] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.439765] ksys_mmap_pgoff+0x3af/0x500 [ 31.440287] do_syscall_64+0x3f/0x90 [ 31.440794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.441441] RIP: 0033:0x7fec9e8d1d82 [ 31.441903] 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 [ 31.444070] RSP: 002b:00007ffd3a84e058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.445000] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec9e8d1d82 [ 31.445867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec9dd0b000 [ 31.446743] RBP: 00007fec9dd0b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.447608] R10: 0000000000000812 R11: 0000000000000206 R12: 000055716ad91ec0 [ 31.448470] R13: 00007ffd3a84e070 R14: 00007ffd3a84e0a0 R15: 00007ffd3a84e400 [ 31.449351] [ 31.449650] [ 31.449866] Allocated by task 213: [ 31.450307] kasan_save_stack+0x22/0x50 [ 31.450830] kasan_set_track+0x25/0x30 [ 31.451336] __kasan_slab_alloc+0x59/0x70 [ 31.451878] kmem_cache_alloc+0x16b/0x370 [ 31.452414] vm_area_dup+0x20/0x160 [ 31.452902] __split_vma+0x170/0x950 [ 31.453385] split_vma+0xc6/0x110 [ 31.453831] mprotect_fixup+0x8d2/0xb30 [ 31.454348] do_mprotect_pkey+0x87e/0xd40 [ 31.454876] __x64_sys_mprotect+0x78/0xc0 [ 31.455406] do_syscall_64+0x3f/0x90 [ 31.455891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.456536] [ 31.456758] Freed by task 213: [ 31.457151] kasan_save_stack+0x22/0x50 [ 31.457662] kasan_set_track+0x25/0x30 [ 31.458160] kasan_save_free_info+0x2b/0x50 [ 31.458696] __kasan_slab_free+0x10a/0x190 [ 31.459233] kmem_cache_free+0x10d/0x4d0 [ 31.459742] rcu_core+0x8c8/0x2860 [ 31.460189] __do_softirq+0x1b7/0x7d4 [ 31.460675] [ 31.460890] Last potentially related work creation: [ 31.461481] kasan_save_stack+0x22/0x50 [ 31.461987] __kasan_record_aux_stack+0x8e/0xa0 [ 31.462571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.463342] remove_vma+0x139/0x170 [ 31.463806] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.464386] do_vmi_munmap+0x1f1/0x2b0 [ 31.464887] __vm_munmap+0x138/0x3a0 [ 31.465361] __x64_sys_munmap+0x59/0x80 [ 31.465872] do_syscall_64+0x3f/0x90 [ 31.466362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.467008] [ 31.467232] The buggy address belongs to the object at ffff88800fde40e8 [ 31.467232] which belongs to the cache vm_area_struct of size 168 [ 31.468746] The buggy address is located 88 bytes inside of [ 31.468746] freed 168-byte region [ffff88800fde40e8, ffff88800fde4190) [ 31.470182] [ 31.470398] The buggy address belongs to the physical page: [ 31.471065] page:00000000876d242a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfde4 [ 31.472160] memcg:ffff88800969de01 [ 31.472590] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.473257] page_type: 0xffffffff() [ 31.473711] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.474641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800969de01 [ 31.475559] page dumped because: kasan: bad access detected [ 31.476230] [ 31.476448] Memory state around the buggy address: [ 31.477059] ffff88800fde4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.477928] ffff88800fde4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.478813] >ffff88800fde4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.479692] ^ [ 31.480354] ffff88800fde4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.481247] ffff88800fde4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.482128] ================================================================== [ 31.483065] Disabling lock debugging due to kernel taint [ 34.423033] BUG: Bad rss-counter state mm:0000000078d232f3 type:MM_FILEPAGES val:33 [ 34.424205] BUG: Bad rss-counter state mm:0000000078d232f3 type:MM_ANONPAGES val:22 [ 34.809204] BUG: Bad rss-counter state mm:00000000543e87e3 type:MM_FILEPAGES val:31 [ 34.810188] BUG: Bad rss-counter state mm:00000000543e87e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57688' (ECDSA) to the list of known hosts. 2023/06/19 21:15:21 fuzzer started 2023/06/19 21:15:21 dialing manager at localhost:44161 2023/06/19 21:15:21 checking machine... 2023/06/19 21:15:21 checking revisions... [ 35.544046] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:15:22 testing simple program... [ 35.599528] cgroup: Unknown subsys name 'net' [ 35.651861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:15:21 Registers: info registers vcpu 0 RAX=1ffff1100281591d RBX=ffff8880140ac8b8 RCX=1ffff1100277643a RDX=dffffc0000000000 RSI=ffff888014370800 RDI=ffff8880140ac8e8 RBP=ffff888013bb21a0 RSP=ffff888019e37c28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888014370000 R13=0000000000000000 R14=ffff888016a50048 R15=ffff888016a50000 RIP=ffffffff818474fe RFL=00000046 [---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 00007f80b1624900 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=00007f80b1bdb618 CR3=000000000fdf6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f5ea510eef0 CR3=0000000014150000 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=cd888eb8e9c34bbce745b95310bdc055 XMM02=00000000001200d0eff9b2d0a8fce9cb XMM03=00000000001201a02c67c8bc2e329bc3 XMM04=8ff65a3e09453bd000000000000ae988 XMM05=e4cb8bb95a7664b60000000000134500 XMM06=c291bd5c70af25b90000000000134388 XMM07=e042d86d42eb936e0000000000124a50 XMM08=af571c48f2a35f0600000000001201a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000