syzkaller login: [ 35.196505] BUG: Bad rss-counter state mm:00000000343b47c0 type:MM_FILEPAGES val:33 [ 35.197967] BUG: Bad rss-counter state mm:00000000343b47c0 type:MM_ANONPAGES val:22 [ 35.378526] ================================================================== [ 35.379695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.380873] Read of size 8 at addr ffff88800b9825c8 by task sshd/219 [ 35.381621] [ 35.381834] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.382730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.384060] Call Trace: [ 35.384503] [ 35.384915] dump_stack_lvl+0x91/0xf0 [ 35.385584] print_report+0xcc/0x620 [ 35.386242] ? __virt_addr_valid+0x102/0x340 [ 35.386973] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.387828] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.388650] kasan_report+0xbe/0xf0 [ 35.389301] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.390150] vma_interval_tree_remove+0xc75/0xec0 [ 35.390955] vma_prepare+0xc54/0x11a0 [ 35.391614] __split_vma+0x5af/0x950 [ 35.392237] ? __pfx___split_vma+0x10/0x10 [ 35.392958] ? find_held_lock+0x2c/0x110 [ 35.393626] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.394386] ? lock_is_held_type+0x9f/0x120 [ 35.395103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.395928] ? mtree_range_walk+0x632/0x900 [ 35.396698] ? mas_walk+0x5c7/0x7c0 [ 35.397325] do_vmi_munmap+0x1f1/0x2b0 [ 35.397997] mmap_region+0x1f9/0x2660 [ 35.398653] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.399331] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.400276] ? __pfx_lock_acquire+0x10/0x10 [ 35.401012] ? __pfx_mmap_region+0x10/0x10 [ 35.401722] ? security_mmap_addr+0x7d/0xa0 [ 35.402418] ? get_unmapped_area+0x1f5/0x3f0 [ 35.403123] do_mmap+0x854/0xf00 [ 35.403666] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.404146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.404705] ksys_mmap_pgoff+0x3af/0x500 [ 35.405193] do_syscall_64+0x3f/0x90 [ 35.405675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.406306] RIP: 0033:0x7f75eb973d82 [ 35.406765] 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 [ 35.408903] RSP: 002b:00007ffd58fc5be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.409810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75eb973d82 [ 35.410668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75eadad000 [ 35.411559] RBP: 00007f75eadad000 R08: 0000000000000009 R09: 0000000000001000 [ 35.412403] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4feed0ec0 [ 35.413251] R13: 00007ffd58fc5c00 R14: 00007ffd58fc5c30 R15: 00007ffd58fc5f90 [ 35.414131] [ 35.414441] [ 35.414655] Allocated by task 212: [ 35.415074] kasan_save_stack+0x22/0x50 [ 35.415633] kasan_set_track+0x25/0x30 [ 35.416113] __kasan_slab_alloc+0x59/0x70 [ 35.416648] kmem_cache_alloc+0x16b/0x370 [ 35.417152] vm_area_dup+0x20/0x160 [ 35.417616] __split_vma+0x170/0x950 [ 35.418078] split_vma+0xc6/0x110 [ 35.418526] mprotect_fixup+0x8d2/0xb30 [ 35.419020] do_mprotect_pkey+0x87e/0xd40 [ 35.419576] __x64_sys_mprotect+0x78/0xc0 [ 35.420090] do_syscall_64+0x3f/0x90 [ 35.420577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.421197] [ 35.421434] Freed by task 212: [ 35.421830] kasan_save_stack+0x22/0x50 [ 35.422335] kasan_set_track+0x25/0x30 [ 35.422835] kasan_save_free_info+0x2b/0x50 [ 35.423359] __kasan_slab_free+0x10a/0x190 [ 35.423939] kmem_cache_free+0x10d/0x4d0 [ 35.424459] rcu_core+0x8c8/0x2860 [ 35.424898] __do_softirq+0x1b7/0x7d4 [ 35.425378] [ 35.425589] Last potentially related work creation: [ 35.426158] kasan_save_stack+0x22/0x50 [ 35.426663] __kasan_record_aux_stack+0x8e/0xa0 [ 35.427234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.427923] remove_vma+0x139/0x170 [ 35.428378] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.428943] do_vmi_munmap+0x1f1/0x2b0 [ 35.429445] __vm_munmap+0x138/0x3a0 [ 35.429910] __x64_sys_munmap+0x59/0x80 [ 35.430506] do_syscall_64+0x3f/0x90 [ 35.431163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.432069] [ 35.432361] The buggy address belongs to the object at ffff88800b982570 [ 35.432361] which belongs to the cache vm_area_struct of size 168 [ 35.434027] The buggy address is located 88 bytes inside of [ 35.434027] freed 168-byte region [ffff88800b982570, ffff88800b982618) [ 35.435446] [ 35.435678] The buggy address belongs to the physical page: [ 35.436323] page:0000000050c198b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb982 [ 35.437413] memcg:ffff888015cb0301 [ 35.437833] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.438478] page_type: 0xffffffff() [ 35.438919] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.439868] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015cb0301 [ 35.440767] page dumped because: kasan: bad access detected [ 35.441438] [ 35.441655] Memory state around the buggy address: [ 35.442226] ffff88800b982480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.443076] ffff88800b982500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.443949] >ffff88800b982580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.444786] ^ [ 35.445448] ffff88800b982600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.446278] ffff88800b982680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.447121] ================================================================== [ 35.448165] Disabling lock debugging due to kernel taint [ 38.136747] BUG: Bad rss-counter state mm:00000000563ab6fd type:MM_FILEPAGES val:33 [ 38.138052] BUG: Bad rss-counter state mm:00000000563ab6fd type:MM_ANONPAGES val:22 [ 38.519936] BUG: Bad rss-counter state mm:00000000743dd6a3 type:MM_FILEPAGES val:33 [ 38.521104] BUG: Bad rss-counter state mm:00000000743dd6a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9331' (ECDSA) to the list of known hosts. 2023/06/19 13:09:38 fuzzer started 2023/06/19 13:09:38 dialing manager at localhost:44161 2023/06/19 13:09:38 checking machine... 2023/06/19 13:09:38 checking revisions... [ 39.246182] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:09:38 testing simple program... [ 39.298434] cgroup: Unknown subsys name 'net' [ 39.369507] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:09:33 Registers: info registers vcpu 0 RAX=ffff8880194b3e42 RBX=ffff888016047b8e RCX=1ffff11002c08f5e RDX=0000000000000005 RSI=ffff8880194b3e42 RDI=ffff888016047b8c RBP=0000000000000073 RSP=ffff88800f69f680 R8 =0000000000000001 R9 =ffff888016047b8c R10=ffff888016047b43 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888016047b9c R14=ffff888016047b8c R15=ffff888016047ab0 RIP=ffffffff844d2b5c RFL=00000283 [--S---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 00007ff9387d8900 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=00007ff938d8f618 CR3=0000000016cd2000 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=ffffffff818c7420 RBX=0000000000000023 RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888019009730 RBP=0000000000000024 RSP=ffff88806cf09e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff888019009730 RIP=ffffffff818c7424 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 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=00007f7d2357c000 CR3=000000000d52a000 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=0cde16309cc3f5827e43167e773cb677 XMM02=ec2efd57dc4c00df000000000011e0a8 XMM03=be0f87e319447f0a000000000011e178 XMM04=9d0f7c0029a146a400000000000ae988 XMM05=744769ac5b98d4a60000000000135768 XMM06=806171799158d9670000000000134808 XMM07=e042d86d42eb936e0000000000125000 XMM08=be0f87e319447f0a000000000011e178 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000