syzkaller login: [ 30.477082] BUG: Bad rss-counter state mm:00000000720cb8ae type:MM_FILEPAGES val:33 [ 30.478507] BUG: Bad rss-counter state mm:00000000720cb8ae type:MM_ANONPAGES val:22 [ 30.655366] ================================================================== [ 30.656291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.657228] Read of size 8 at addr ffff888017f37df0 by task sshd/221 [ 30.658133] [ 30.658359] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.659222] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.660245] Call Trace: [ 30.660570] [ 30.660859] dump_stack_lvl+0x91/0xf0 [ 30.661364] print_report+0xcc/0x620 [ 30.661875] ? __virt_addr_valid+0x102/0x340 [ 30.662438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663058] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663677] kasan_report+0xbe/0xf0 [ 30.664162] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664795] vma_interval_tree_remove+0xc75/0xec0 [ 30.665405] vma_prepare+0xc54/0x11a0 [ 30.665894] __split_vma+0x5af/0x950 [ 30.666372] ? __pfx___split_vma+0x10/0x10 [ 30.666916] ? find_held_lock+0x2c/0x110 [ 30.667461] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.668051] ? lock_is_held_type+0x9f/0x120 [ 30.668628] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.669267] ? mtree_range_walk+0x632/0x900 [ 30.669882] ? mas_walk+0x5c7/0x7c0 [ 30.670379] do_vmi_munmap+0x1f1/0x2b0 [ 30.670895] mmap_region+0x1f9/0x2660 [ 30.671407] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.671925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.672670] ? __pfx_lock_acquire+0x10/0x10 [ 30.673220] ? __pfx_mmap_region+0x10/0x10 [ 30.673787] ? security_mmap_addr+0x7d/0xa0 [ 30.674344] ? get_unmapped_area+0x1f5/0x3f0 [ 30.675012] do_mmap+0x854/0xf00 [ 30.675471] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.676003] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.676597] ksys_mmap_pgoff+0x3af/0x500 [ 30.677128] do_syscall_64+0x3f/0x90 [ 30.677652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678335] RIP: 0033:0x7f342cbe9d82 [ 30.678825] 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 [ 30.681107] RSP: 002b:00007ffd4eef3b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.682085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f342cbe9d82 [ 30.682987] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f342c023000 [ 30.683892] RBP: 00007f342c023000 R08: 0000000000000009 R09: 0000000000001000 [ 30.684801] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aef82f6ec0 [ 30.685709] R13: 00007ffd4eef3bb0 R14: 00007ffd4eef3be0 R15: 00007ffd4eef3f40 [ 30.686608] [ 30.686913] [ 30.687129] Allocated by task 214: [ 30.687567] kasan_save_stack+0x22/0x50 [ 30.688076] kasan_set_track+0x25/0x30 [ 30.688583] __kasan_slab_alloc+0x59/0x70 [ 30.689125] kmem_cache_alloc+0x16b/0x370 [ 30.689691] vm_area_dup+0x20/0x160 [ 30.690181] __split_vma+0x170/0x950 [ 30.690669] split_vma+0xc6/0x110 [ 30.691129] mprotect_fixup+0x8d2/0xb30 [ 30.691659] do_mprotect_pkey+0x87e/0xd40 [ 30.692209] __x64_sys_mprotect+0x78/0xc0 [ 30.692759] do_syscall_64+0x3f/0x90 [ 30.693259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693924] [ 30.694149] Freed by task 214: [ 30.694558] kasan_save_stack+0x22/0x50 [ 30.695075] kasan_set_track+0x25/0x30 [ 30.695571] kasan_save_free_info+0x2b/0x50 [ 30.696106] __kasan_slab_free+0x10a/0x190 [ 30.696637] kmem_cache_free+0x10d/0x4d0 [ 30.697149] rcu_core+0x8c8/0x2860 [ 30.697617] __do_softirq+0x1b7/0x7d4 [ 30.698102] [ 30.698319] Last potentially related work creation: [ 30.698910] kasan_save_stack+0x22/0x50 [ 30.699413] __kasan_record_aux_stack+0x8e/0xa0 [ 30.699991] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.700638] remove_vma+0x139/0x170 [ 30.701093] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.701664] do_vmi_munmap+0x1f1/0x2b0 [ 30.702155] __vm_munmap+0x138/0x3a0 [ 30.702625] __x64_sys_munmap+0x59/0x80 [ 30.703127] do_syscall_64+0x3f/0x90 [ 30.703616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.704263] [ 30.704477] The buggy address belongs to the object at ffff888017f37d98 [ 30.704477] which belongs to the cache vm_area_struct of size 168 [ 30.705971] The buggy address is located 88 bytes inside of [ 30.705971] freed 168-byte region [ffff888017f37d98, ffff888017f37e40) [ 30.707514] [ 30.707764] The buggy address belongs to the physical page: [ 30.708541] page:00000000d6305c21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f37 [ 30.709840] memcg:ffff88800e760101 [ 30.710330] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.711076] page_type: 0xffffffff() [ 30.711604] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.712674] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e760101 [ 30.713735] page dumped because: kasan: bad access detected [ 30.714505] [ 30.714752] Memory state around the buggy address: [ 30.715423] ffff888017f37c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.716302] ffff888017f37d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.717181] >ffff888017f37d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.718052] ^ [ 30.718881] ffff888017f37e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.719757] ffff888017f37e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.720625] ================================================================== [ 30.721678] Disabling lock debugging due to kernel taint [ 33.077218] BUG: Bad rss-counter state mm:00000000d9c2ec15 type:MM_FILEPAGES val:33 [ 33.078373] BUG: Bad rss-counter state mm:00000000d9c2ec15 type:MM_ANONPAGES val:22 [ 33.652601] BUG: Bad rss-counter state mm:000000006c3c50fc type:MM_FILEPAGES val:33 [ 33.653778] BUG: Bad rss-counter state mm:000000006c3c50fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40985' (ECDSA) to the list of known hosts. 2023/06/20 20:36:54 fuzzer started 2023/06/20 20:36:55 dialing manager at localhost:36067 2023/06/20 20:36:55 checking machine... 2023/06/20 20:36:55 checking revisions... [ 34.286728] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:36:55 testing simple program... [ 34.330038] cgroup: Unknown subsys name 'net' [ 34.379501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:36:54 Registers: info registers vcpu 0 RAX=1ffff110034494d1 RBX=ffff88801a24a658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801a24a688 RBP=ffff88801a257000 RSP=ffff888008d9fcb8 R8 =0000000000000001 R9 =ffffed10011b3f8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88801a23da10 R14=ffffffff813782f8 R15=ffff88801a23da10 RIP=ffffffff818464ec 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 0000000000000000 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=00007f2bb62ab0b0 CR3=000000000eda2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e37958 RCX=ffffffff860a1201 RDX=1ffff110011c6f36 RSI=0000000000000000 RDI=ffffffff8121b48b RBP=ffff888008e379b0 RSP=ffff888008e37940 R8 =ffffffff860a12fa R9 =ffff888008e37998 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e37a20 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88800d9de900 RIP=ffffffff811303b2 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=00007feb4f2f3cb0 CR3=0000000009446000 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=25252525252525252525252525252525 XMM01=0000000000000000ff00ff0000000000 XMM02=0000000000000000ff00000000000000 XMM03=00746f6f72207265737520726f662064 XMM04=6029c17b8886c41b00000000000ae988 XMM05=dd82191f8b1c1a0f0000000000132838 XMM06=c291bd5c70af25b90000000000131628 XMM07=00000000000000000000000000000000 XMM08=676e6979727465520075253d4449555f XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000