syzkaller login: [ 30.703921] BUG: Bad rss-counter state mm:000000000ab111c6 type:MM_FILEPAGES val:33 [ 30.705927] BUG: Bad rss-counter state mm:000000000ab111c6 type:MM_ANONPAGES val:22 [ 30.879387] ================================================================== [ 30.880396] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.881406] Read of size 8 at addr ffff8880198266b0 by task sshd/220 [ 30.882356] [ 30.882595] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.883556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.884621] Call Trace: [ 30.884972] [ 30.885279] dump_stack_lvl+0x91/0xf0 [ 30.885809] print_report+0xcc/0x620 [ 30.886334] ? __virt_addr_valid+0x102/0x340 [ 30.886932] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.887604] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.888260] kasan_report+0xbe/0xf0 [ 30.888765] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889428] vma_interval_tree_remove+0xc75/0xec0 [ 30.890077] vma_prepare+0xc54/0x11a0 [ 30.890592] __split_vma+0x5af/0x950 [ 30.891105] ? __pfx___split_vma+0x10/0x10 [ 30.891669] ? find_held_lock+0x2c/0x110 [ 30.892229] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.892838] ? lock_is_held_type+0x9f/0x120 [ 30.893420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.894075] ? mtree_range_walk+0x632/0x900 [ 30.894666] ? mas_walk+0x5c7/0x7c0 [ 30.895196] do_vmi_munmap+0x1f1/0x2b0 [ 30.895720] mmap_region+0x1f9/0x2660 [ 30.896233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.896782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.897540] ? __pfx_lock_acquire+0x10/0x10 [ 30.898111] ? __pfx_mmap_region+0x10/0x10 [ 30.898682] ? security_mmap_addr+0x7d/0xa0 [ 30.899252] ? get_unmapped_area+0x1f5/0x3f0 [ 30.899848] do_mmap+0x854/0xf00 [ 30.900313] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.900846] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.901443] ksys_mmap_pgoff+0x3af/0x500 [ 30.901985] do_syscall_64+0x3f/0x90 [ 30.902494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.903213] RIP: 0033:0x7f65ad5f6d82 [ 30.903705] 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 [ 30.906010] RSP: 002b:00007fffde579358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.906984] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65ad5f6d82 [ 30.907883] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65aca30000 [ 30.908788] RBP: 00007f65aca30000 R08: 0000000000000009 R09: 0000000000001000 [ 30.909690] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aecb12cf70 [ 30.910589] R13: 00007fffde579370 R14: 00007fffde5793a0 R15: 00007fffde579700 [ 30.911501] [ 30.911820] [ 30.912051] Allocated by task 213: [ 30.912507] kasan_save_stack+0x22/0x50 [ 30.913048] kasan_set_track+0x25/0x30 [ 30.913567] __kasan_slab_alloc+0x59/0x70 [ 30.914127] kmem_cache_alloc+0x16b/0x370 [ 30.914674] vm_area_dup+0x20/0x160 [ 30.915179] __split_vma+0x170/0x950 [ 30.915680] split_vma+0xc6/0x110 [ 30.916158] mprotect_fixup+0x8d2/0xb30 [ 30.916691] do_mprotect_pkey+0x87e/0xd40 [ 30.917256] __x64_sys_mprotect+0x78/0xc0 [ 30.917816] do_syscall_64+0x3f/0x90 [ 30.918326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919020] [ 30.919256] Freed by task 213: [ 30.919671] kasan_save_stack+0x22/0x50 [ 30.920217] kasan_set_track+0x25/0x30 [ 30.920750] kasan_save_free_info+0x2b/0x50 [ 30.921328] __kasan_slab_free+0x10a/0x190 [ 30.921905] kmem_cache_free+0x10d/0x4d0 [ 30.922455] rcu_core+0x8c8/0x2860 [ 30.922956] __do_softirq+0x1b7/0x7d4 [ 30.923471] [ 30.923701] Last potentially related work creation: [ 30.924332] kasan_save_stack+0x22/0x50 [ 30.924875] __kasan_record_aux_stack+0x8e/0xa0 [ 30.925493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.926182] remove_vma+0x139/0x170 [ 30.926663] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.927270] do_vmi_munmap+0x1f1/0x2b0 [ 30.927796] __vm_munmap+0x138/0x3a0 [ 30.928301] __x64_sys_munmap+0x59/0x80 [ 30.928836] do_syscall_64+0x3f/0x90 [ 30.929343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.930036] [ 30.930269] The buggy address belongs to the object at ffff888019826658 [ 30.930269] which belongs to the cache vm_area_struct of size 168 [ 30.931856] The buggy address is located 88 bytes inside of [ 30.931856] freed 168-byte region [ffff888019826658, ffff888019826700) [ 30.933359] [ 30.933594] The buggy address belongs to the physical page: [ 30.934307] page:0000000039559643 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19826 [ 30.935756] memcg:ffff88800dcc0001 [ 30.936342] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.937225] page_type: 0xffffffff() [ 30.937813] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.938971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcc0001 [ 30.940003] page dumped because: kasan: bad access detected [ 30.940659] [ 30.940876] Memory state around the buggy address: [ 30.941468] ffff888019826580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.942330] ffff888019826600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.943198] >ffff888019826680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.944046] ^ [ 30.944627] ffff888019826700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.945478] ffff888019826780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.946334] ================================================================== [ 30.947443] Disabling lock debugging due to kernel taint [ 33.298507] BUG: Bad rss-counter state mm:00000000994f8013 type:MM_FILEPAGES val:33 [ 33.299537] BUG: Bad rss-counter state mm:00000000994f8013 type:MM_ANONPAGES val:22 [ 33.841064] BUG: Bad rss-counter state mm:0000000005ead9c7 type:MM_FILEPAGES val:33 [ 33.842237] BUG: Bad rss-counter state mm:0000000005ead9c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1295' (ECDSA) to the list of known hosts. 2023/06/21 05:55:26 fuzzer started 2023/06/21 05:55:26 dialing manager at localhost:36067 2023/06/21 05:55:26 checking machine... 2023/06/21 05:55:26 checking revisions... [ 34.506831] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:55:26 testing simple program... [ 34.554474] cgroup: Unknown subsys name 'net' [ 34.597609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:55:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888013f91900 RCX=ffff88800844f780 RDX=ffffea0000252040 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff888014367600 R8 =ffff888009481130 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff888014367640 R14=ffff88800844f780 R15=ffff88800b3cd850 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007fe39a848900 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=000055cccc710748 CR3=000000000f380000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=46b106e80c90417900000000000ae988 XMM05=b614aa3a4b71965c0000000000132420 XMM06=4fda316b135da52b00000000001314c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0938901 RBX=0000000000000016 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81f2c266 RDI=ffffffff849c4808 RBP=0000000000000001 RSP=ffff88800cbefaa8 R8 =0000000000000005 R9 =0000000000000044 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800cbefb40 R13=dffffc0000000000 R14=0000000000000010 R15=ffff88800d653780 RIP=ffffffff81f2c27a RFL=00000212 [----A--] 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 00007f22741e3900 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=00007f227479a618 CR3=0000000013b50000 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=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