syzkaller login: [ 30.175188] BUG: Bad rss-counter state mm:00000000ffcc4c79 type:MM_FILEPAGES val:33 [ 30.176790] BUG: Bad rss-counter state mm:00000000ffcc4c79 type:MM_ANONPAGES val:22 [ 30.351706] ================================================================== [ 30.352787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.353993] Read of size 8 at addr ffff88800fd12df0 by task sshd/219 [ 30.354945] [ 30.355207] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.356220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.357287] Call Trace: [ 30.357616] [ 30.357910] dump_stack_lvl+0x91/0xf0 [ 30.358404] print_report+0xcc/0x620 [ 30.358896] ? __virt_addr_valid+0x102/0x340 [ 30.359459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360078] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.360693] kasan_report+0xbe/0xf0 [ 30.361168] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.361798] vma_interval_tree_remove+0xc75/0xec0 [ 30.362400] vma_prepare+0xc54/0x11a0 [ 30.362882] __split_vma+0x5af/0x950 [ 30.363353] ? __pfx___split_vma+0x10/0x10 [ 30.363890] ? find_held_lock+0x2c/0x110 [ 30.364413] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.364993] ? lock_is_held_type+0x9f/0x120 [ 30.365534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.366167] ? mtree_range_walk+0x632/0x900 [ 30.366724] ? mas_walk+0x5c7/0x7c0 [ 30.367202] do_vmi_munmap+0x1f1/0x2b0 [ 30.367697] mmap_region+0x1f9/0x2660 [ 30.368178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.368691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.369410] ? __pfx_lock_acquire+0x10/0x10 [ 30.369961] ? __pfx_mmap_region+0x10/0x10 [ 30.370497] ? security_mmap_addr+0x7d/0xa0 [ 30.371030] ? get_unmapped_area+0x1f5/0x3f0 [ 30.371580] do_mmap+0x854/0xf00 [ 30.372025] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.372523] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.373076] ksys_mmap_pgoff+0x3af/0x500 [ 30.373582] do_syscall_64+0x3f/0x90 [ 30.374073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.374717] RIP: 0033:0x7f8596761d82 [ 30.375169] 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 [ 30.377298] RSP: 002b:00007ffcd433a248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.378227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8596761d82 [ 30.379077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8595b9b000 [ 30.379931] RBP: 00007f8595b9b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.380771] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646af062ec0 [ 30.381628] R13: 00007ffcd433a260 R14: 00007ffcd433a290 R15: 00007ffcd433a5f0 [ 30.382498] [ 30.382787] [ 30.383005] Allocated by task 212: [ 30.383436] kasan_save_stack+0x22/0x50 [ 30.383935] kasan_set_track+0x25/0x30 [ 30.384426] __kasan_slab_alloc+0x59/0x70 [ 30.384958] kmem_cache_alloc+0x16b/0x370 [ 30.385474] vm_area_dup+0x20/0x160 [ 30.385957] __split_vma+0x170/0x950 [ 30.386424] split_vma+0xc6/0x110 [ 30.386862] mprotect_fixup+0x8d2/0xb30 [ 30.387373] do_mprotect_pkey+0x87e/0xd40 [ 30.387902] __x64_sys_mprotect+0x78/0xc0 [ 30.388424] do_syscall_64+0x3f/0x90 [ 30.388903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.389551] [ 30.389774] Freed by task 212: [ 30.390173] kasan_save_stack+0x22/0x50 [ 30.390680] kasan_set_track+0x25/0x30 [ 30.391178] kasan_save_free_info+0x2b/0x50 [ 30.391718] __kasan_slab_free+0x10a/0x190 [ 30.392253] kmem_cache_free+0x10d/0x4d0 [ 30.392758] rcu_core+0x8c8/0x2860 [ 30.393204] __do_softirq+0x1b7/0x7d4 [ 30.393683] [ 30.393908] Last potentially related work creation: [ 30.394496] kasan_save_stack+0x22/0x50 [ 30.395000] __kasan_record_aux_stack+0x8e/0xa0 [ 30.395653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.396300] remove_vma+0x139/0x170 [ 30.396750] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.397312] do_vmi_munmap+0x1f1/0x2b0 [ 30.397811] __vm_munmap+0x138/0x3a0 [ 30.398279] __x64_sys_munmap+0x59/0x80 [ 30.398774] do_syscall_64+0x3f/0x90 [ 30.399248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.399892] [ 30.400105] The buggy address belongs to the object at ffff88800fd12d98 [ 30.400105] which belongs to the cache vm_area_struct of size 168 [ 30.401592] The buggy address is located 88 bytes inside of [ 30.401592] freed 168-byte region [ffff88800fd12d98, ffff88800fd12e40) [ 30.403045] [ 30.403260] The buggy address belongs to the physical page: [ 30.403926] page:00000000fec8a4f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd12 [ 30.405009] memcg:ffff88800cb43f01 [ 30.405433] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.406154] page_type: 0xffffffff() [ 30.406604] raw: 0100000000000200 ffff8880087a0c80 ffffea000037b2c0 dead000000000005 [ 30.407542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb43f01 [ 30.408451] page dumped because: kasan: bad access detected [ 30.409123] [ 30.409341] Memory state around the buggy address: [ 30.409937] ffff88800fd12c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.410792] ffff88800fd12d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.411642] >ffff88800fd12d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.412492] ^ [ 30.413315] ffff88800fd12e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.414185] ffff88800fd12e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.415031] ================================================================== [ 30.415937] Disabling lock debugging due to kernel taint [ 32.325261] BUG: Bad rss-counter state mm:00000000cd2873ea type:MM_FILEPAGES val:33 [ 32.326803] BUG: Bad rss-counter state mm:00000000cd2873ea type:MM_ANONPAGES val:22 [ 32.793371] BUG: Bad rss-counter state mm:00000000433109f7 type:MM_FILEPAGES val:33 [ 32.794354] BUG: Bad rss-counter state mm:00000000433109f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16562' (ECDSA) to the list of known hosts. 2023/06/20 23:11:02 fuzzer started 2023/06/20 23:11:02 dialing manager at localhost:36067 2023/06/20 23:11:02 checking machine... 2023/06/20 23:11:02 checking revisions... [ 33.518873] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:11:02 testing simple program... [ 33.578765] cgroup: Unknown subsys name 'net' [ 33.616391] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:11:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f6df1787163 RCX=0000000000000000 RDX=ffff88800fb89b40 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f6df1787163 RSP=ffff88800f32f4c8 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f6df1787000 R11=00000000000b6a61 R12=ffff88800f32f5e8 R13=0000000000000000 R14=ffff88800fb89b40 R15=00000000000000a4 RIP=ffffffff811fc714 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 00007f6df1294900 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=00007f6df184b618 CR3=000000000d9b0000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007feb6aa2b000 CR3=000000000c6f4000 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=6215f7f326ffc5ac634db44c3ea87ec8 XMM02=ec2efd57dc4c00df000000000011bdc0 XMM03=6875c627939661b8000000000011be90 XMM04=d36e73dccfd1251a00000000000ae988 XMM05=dfcdbad4f1609c370000000000132a98 XMM06=4f4a53ad14050b6e0000000000131900 XMM07=e042d86d42eb936e0000000000122e90 XMM08=6875c627939661b8000000000011be90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000