syzkaller login: [ 30.108429] BUG: Bad rss-counter state mm:000000005f43cc51 type:MM_FILEPAGES val:33 [ 30.110315] BUG: Bad rss-counter state mm:000000005f43cc51 type:MM_ANONPAGES val:22 [ 30.278447] ================================================================== [ 30.279364] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.280313] Read of size 8 at addr ffff88800e8ea798 by task sshd/220 [ 30.281081] [ 30.281298] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.282291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.283271] Call Trace: [ 30.283597] [ 30.283885] dump_stack_lvl+0x91/0xf0 [ 30.284380] print_report+0xcc/0x620 [ 30.284864] ? __virt_addr_valid+0x102/0x340 [ 30.285461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.286075] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.286709] kasan_report+0xbe/0xf0 [ 30.287192] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.287829] vma_interval_tree_remove+0xc75/0xec0 [ 30.288444] vma_prepare+0xc54/0x11a0 [ 30.288934] __split_vma+0x5af/0x950 [ 30.289425] ? __pfx___split_vma+0x10/0x10 [ 30.289972] ? find_held_lock+0x2c/0x110 [ 30.290509] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.291085] ? lock_is_held_type+0x9f/0x120 [ 30.291639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.292256] ? mtree_range_walk+0x632/0x900 [ 30.292824] ? mas_walk+0x5c7/0x7c0 [ 30.293311] do_vmi_munmap+0x1f1/0x2b0 [ 30.293823] mmap_region+0x1f9/0x2660 [ 30.294323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.294846] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.295570] ? __pfx_lock_acquire+0x10/0x10 [ 30.296111] ? __pfx_mmap_region+0x10/0x10 [ 30.296656] ? security_mmap_addr+0x7d/0xa0 [ 30.297207] ? get_unmapped_area+0x1f5/0x3f0 [ 30.297781] do_mmap+0x854/0xf00 [ 30.298234] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.298746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.299326] ksys_mmap_pgoff+0x3af/0x500 [ 30.299848] do_syscall_64+0x3f/0x90 [ 30.300346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.301013] RIP: 0033:0x7f125519ad82 [ 30.301499] 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 [ 30.303674] RSP: 002b:00007fff404b58a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.304615] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f125519ad82 [ 30.305506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12545d4000 [ 30.306380] RBP: 00007f12545d4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.307252] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb6491bec0 [ 30.308119] R13: 00007fff404b58c0 R14: 00007fff404b58f0 R15: 00007fff404b5c50 [ 30.309000] [ 30.309304] [ 30.309534] Allocated by task 213: [ 30.309977] kasan_save_stack+0x22/0x50 [ 30.310490] kasan_set_track+0x25/0x30 [ 30.310994] __kasan_slab_alloc+0x59/0x70 [ 30.311534] kmem_cache_alloc+0x16b/0x370 [ 30.312061] vm_area_dup+0x20/0x160 [ 30.312535] __split_vma+0x170/0x950 [ 30.313003] split_vma+0xc6/0x110 [ 30.313464] mprotect_fixup+0x8d2/0xb30 [ 30.313974] do_mprotect_pkey+0x87e/0xd40 [ 30.314506] __x64_sys_mprotect+0x78/0xc0 [ 30.315039] do_syscall_64+0x3f/0x90 [ 30.315527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.316181] [ 30.316398] Freed by task 213: [ 30.316793] kasan_save_stack+0x22/0x50 [ 30.317312] kasan_set_track+0x25/0x30 [ 30.317836] kasan_save_free_info+0x2b/0x50 [ 30.318380] __kasan_slab_free+0x10a/0x190 [ 30.318929] kmem_cache_free+0x10d/0x4d0 [ 30.319450] rcu_core+0x8c8/0x2860 [ 30.319908] __do_softirq+0x1b7/0x7d4 [ 30.320386] [ 30.320602] Last potentially related work creation: [ 30.321200] kasan_save_stack+0x22/0x50 [ 30.321717] __kasan_record_aux_stack+0x8e/0xa0 [ 30.322307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.322963] remove_vma+0x139/0x170 [ 30.323427] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.323994] do_vmi_munmap+0x1f1/0x2b0 [ 30.324486] __vm_munmap+0x138/0x3a0 [ 30.324960] __x64_sys_munmap+0x59/0x80 [ 30.325479] do_syscall_64+0x3f/0x90 [ 30.325960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.326610] [ 30.326826] The buggy address belongs to the object at ffff88800e8ea740 [ 30.326826] which belongs to the cache vm_area_struct of size 168 [ 30.328329] The buggy address is located 88 bytes inside of [ 30.328329] freed 168-byte region [ffff88800e8ea740, ffff88800e8ea7e8) [ 30.329784] [ 30.330005] The buggy address belongs to the physical page: [ 30.330672] page:000000004ee101e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8ea [ 30.331776] memcg:ffff88800f15f401 [ 30.332204] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.332867] page_type: 0xffffffff() [ 30.333326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.334270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f15f401 [ 30.335190] page dumped because: kasan: bad access detected [ 30.335872] [ 30.336085] Memory state around the buggy address: [ 30.336667] ffff88800e8ea680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.337528] ffff88800e8ea700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.338381] >ffff88800e8ea780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.339256] ^ [ 30.339771] ffff88800e8ea800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.340651] ffff88800e8ea880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.341532] ================================================================== [ 30.342522] Disabling lock debugging due to kernel taint [ 32.411774] BUG: Bad rss-counter state mm:00000000311f9e8f type:MM_FILEPAGES val:33 [ 32.412938] BUG: Bad rss-counter state mm:00000000311f9e8f type:MM_ANONPAGES val:22 [ 32.883403] BUG: Bad rss-counter state mm:00000000be879709 type:MM_FILEPAGES val:33 [ 32.884592] BUG: Bad rss-counter state mm:00000000be879709 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8112' (ECDSA) to the list of known hosts. 2023/06/20 11:07:33 fuzzer started 2023/06/20 11:07:33 dialing manager at localhost:36067 2023/06/20 11:07:33 checking machine... 2023/06/20 11:07:33 checking revisions... [ 33.515658] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:07:33 testing simple program... [ 33.566680] cgroup: Unknown subsys name 'net' [ 33.607140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:07:33 Registers: info registers vcpu 0 RAX=1ffffffff0b4c779 RBX=00000000fffffffe RCX=0000000000000000 RDX=ffff888019fd9b40 RSI=ffffffff81210f39 RDI=ffffffff85a63bc8 RBP=ffffffff85a63bc0 RSP=ffff88800fd6fc00 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffe R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=ffffffff85a63bc0 R15=0000000000000000 RIP=ffffffff81210f49 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 00007fd528ff2900 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=00007fd5295a9618 CR3=0000000009874000 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=563412feff00545000000000000080fe 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=ffff888008c04400 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=00007f8ad832c780 CR3=000000000c9b2000 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=e76035c0626b0ba1a04899522c6250db XMM02=000000000011d848ec2efd57dc4c00df XMM03=0000000000121f103ded6f948c5e4b44 XMM04=f7ec492e1b3d94c300000000000ae988 XMM05=1e46442606cbe5750000000000132b20 XMM06=4fda316b135da52b0000000000131bc0 XMM07=e042d86d42eb936e0000000000122190 XMM08=3ded6f948c5e4b44000000000011d8a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000