syzkaller login: [ 31.267204] BUG: Bad rss-counter state mm:00000000cb73d413 type:MM_FILEPAGES val:33 [ 31.268442] BUG: Bad rss-counter state mm:00000000cb73d413 type:MM_ANONPAGES val:22 [ 31.307360] ================================================================== [ 31.308564] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.309679] Read of size 8 at addr ffff88801a02a6b0 by task sshd/219 [ 31.310471] [ 31.310695] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.311572] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.312597] Call Trace: [ 31.312925] [ 31.313212] dump_stack_lvl+0x91/0xf0 [ 31.313716] print_report+0xcc/0x620 [ 31.314214] ? __virt_addr_valid+0x102/0x340 [ 31.314777] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.315422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.316047] kasan_report+0xbe/0xf0 [ 31.316567] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.317205] vma_interval_tree_remove+0xc75/0xec0 [ 31.317828] vma_prepare+0xc54/0x11a0 [ 31.318336] __split_vma+0x5af/0x950 [ 31.318829] ? __pfx___split_vma+0x10/0x10 [ 31.319386] ? find_held_lock+0x2c/0x110 [ 31.319918] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.320546] ? lock_is_held_type+0x9f/0x120 [ 31.321098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.321730] ? mtree_range_walk+0x632/0x900 [ 31.322310] ? mas_walk+0x5c7/0x7c0 [ 31.322801] do_vmi_munmap+0x1f1/0x2b0 [ 31.323318] mmap_region+0x1f9/0x2660 [ 31.323807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.324359] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.325089] ? __pfx_lock_acquire+0x10/0x10 [ 31.325644] ? __pfx_mmap_region+0x10/0x10 [ 31.326185] ? security_mmap_addr+0x7d/0xa0 [ 31.326737] ? get_unmapped_area+0x1f5/0x3f0 [ 31.327309] do_mmap+0x854/0xf00 [ 31.327763] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.328308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.328900] ksys_mmap_pgoff+0x3af/0x500 [ 31.329429] do_syscall_64+0x3f/0x90 [ 31.329919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330586] RIP: 0033:0x7f0ad0b5bd82 [ 31.331055] 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 [ 31.333235] RSP: 002b:00007fff6286c728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.334171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ad0b5bd82 [ 31.335037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0acff95000 [ 31.335903] RBP: 00007f0acff95000 R08: 0000000000000009 R09: 0000000000001000 [ 31.336790] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611d96f4ec0 [ 31.337658] R13: 00007fff6286c740 R14: 00007fff6286c770 R15: 00007fff6286cad0 [ 31.338534] [ 31.338831] [ 31.339052] Allocated by task 212: [ 31.339489] kasan_save_stack+0x22/0x50 [ 31.340012] kasan_set_track+0x25/0x30 [ 31.340529] __kasan_slab_alloc+0x59/0x70 [ 31.341089] kmem_cache_alloc+0x16b/0x370 [ 31.341615] vm_area_dup+0x20/0x160 [ 31.342077] __split_vma+0x170/0x950 [ 31.342558] split_vma+0xc6/0x110 [ 31.343003] mprotect_fixup+0x8d2/0xb30 [ 31.343513] do_mprotect_pkey+0x87e/0xd40 [ 31.344040] __x64_sys_mprotect+0x78/0xc0 [ 31.344568] do_syscall_64+0x3f/0x90 [ 31.345047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.345706] [ 31.345926] Freed by task 212: [ 31.346326] kasan_save_stack+0x22/0x50 [ 31.346838] kasan_set_track+0x25/0x30 [ 31.347339] kasan_save_free_info+0x2b/0x50 [ 31.347880] __kasan_slab_free+0x10a/0x190 [ 31.348436] kmem_cache_free+0x10d/0x4d0 [ 31.348960] rcu_core+0x8c8/0x2860 [ 31.349414] __do_softirq+0x1b7/0x7d4 [ 31.349906] [ 31.350122] Last potentially related work creation: [ 31.350729] kasan_save_stack+0x22/0x50 [ 31.351243] __kasan_record_aux_stack+0x8e/0xa0 [ 31.351824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.352509] remove_vma+0x139/0x170 [ 31.352972] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.353533] do_vmi_munmap+0x1f1/0x2b0 [ 31.354029] __vm_munmap+0x138/0x3a0 [ 31.354508] __x64_sys_munmap+0x59/0x80 [ 31.355006] do_syscall_64+0x3f/0x90 [ 31.355497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.356146] [ 31.356377] The buggy address belongs to the object at ffff88801a02a658 [ 31.356377] which belongs to the cache vm_area_struct of size 168 [ 31.357892] The buggy address is located 88 bytes inside of [ 31.357892] freed 168-byte region [ffff88801a02a658, ffff88801a02a700) [ 31.359313] [ 31.359534] The buggy address belongs to the physical page: [ 31.360209] page:00000000720e13be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a02a [ 31.361331] memcg:ffff88800c4aef01 [ 31.361771] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.362426] page_type: 0xffffffff() [ 31.362883] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.363813] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4aef01 [ 31.364730] page dumped because: kasan: bad access detected [ 31.365405] [ 31.365623] Memory state around the buggy address: [ 31.366205] ffff88801a02a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.367061] ffff88801a02a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.367920] >ffff88801a02a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.368789] ^ [ 31.369378] ffff88801a02a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.370233] ffff88801a02a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.371090] ================================================================== [ 31.372157] Disabling lock debugging due to kernel taint [ 33.223656] BUG: Bad rss-counter state mm:000000000f6681f6 type:MM_FILEPAGES val:33 [ 33.224315] BUG: Bad rss-counter state mm:000000000f6681f6 type:MM_ANONPAGES val:22 [ 33.640395] BUG: Bad rss-counter state mm:000000009edc77f3 type:MM_FILEPAGES val:33 [ 33.641581] BUG: Bad rss-counter state mm:000000009edc77f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11431' (ECDSA) to the list of known hosts. 2023/06/19 21:53:22 fuzzer started 2023/06/19 21:53:23 dialing manager at localhost:44161 2023/06/19 21:53:23 checking machine... 2023/06/19 21:53:23 checking revisions... [ 34.372530] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:53:23 testing simple program... [ 34.422568] cgroup: Unknown subsys name 'net' [ 34.467593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:53:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff8880158d0000 RSI=ffffffff83ab3fa9 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88801be57508 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000009 R11=0000091900000919 R12=0000000000000000 R13=0000000000000009 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff83ab3fb1 RFL=00000293 [--S-A-C] 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 00007fd12a9e7900 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=00007fd12af9e618 CR3=000000000dbe6000 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=ffffffff8450d49f RCX=ffffffff864bb001 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff8450d49f RBP=ffffffff8450d49f RSP=ffff88806cf09a48 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=0000000000000001 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800c9ffd90 RIP=ffffffff811fc772 RFL=00000287 [--S--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 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=00007fe0965b7510 CR3=000000000cd38000 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=fb00c5dacdea71831b43bb3f37de8b41 XMM02=ec2efd57dc4c00df0000000000120090 XMM03=51196f1ffcbfaa120000000000120160 XMM04=ff31e7d0322733c100000000000ae988 XMM05=19e9129bd510f2350000000000134358 XMM06=864bebd4655e173400000000001331c0 XMM07=e042d86d42eb936e0000000000124a48 XMM08=51196f1ffcbfaa120000000000120160 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000