syzkaller login: [ 33.121318] BUG: Bad rss-counter state mm:00000000363c6217 type:MM_FILEPAGES val:33 [ 33.122975] BUG: Bad rss-counter state mm:00000000363c6217 type:MM_ANONPAGES val:22 [ 33.280450] ================================================================== [ 33.281954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.283383] Read of size 8 at addr ffff888015b17228 by task sshd/220 [ 33.284483] [ 33.284777] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.285915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.287209] Call Trace: [ 33.287632] [ 33.288011] dump_stack_lvl+0x91/0xf0 [ 33.288667] print_report+0xcc/0x620 [ 33.289322] ? __virt_addr_valid+0x102/0x340 [ 33.290100] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.290964] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.291662] kasan_report+0xbe/0xf0 [ 33.292161] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.292812] vma_interval_tree_remove+0xc75/0xec0 [ 33.293449] vma_prepare+0xc54/0x11a0 [ 33.293964] __split_vma+0x5af/0x950 [ 33.294461] ? __pfx___split_vma+0x10/0x10 [ 33.295020] ? find_held_lock+0x2c/0x110 [ 33.295757] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.296511] ? lock_is_held_type+0x9f/0x120 [ 33.297183] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.297961] ? mtree_range_walk+0x632/0x900 [ 33.298660] ? mas_walk+0x5c7/0x7c0 [ 33.299281] do_vmi_munmap+0x1f1/0x2b0 [ 33.299901] mmap_region+0x1f9/0x2660 [ 33.300538] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.301175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.302085] ? __pfx_lock_acquire+0x10/0x10 [ 33.302777] ? __pfx_mmap_region+0x10/0x10 [ 33.303490] ? security_mmap_addr+0x7d/0xa0 [ 33.304152] ? get_unmapped_area+0x1f5/0x3f0 [ 33.304817] do_mmap+0x854/0xf00 [ 33.305352] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.305926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.306588] ksys_mmap_pgoff+0x3af/0x500 [ 33.307192] do_syscall_64+0x3f/0x90 [ 33.307760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.308551] RIP: 0033:0x7fa803e31d82 [ 33.309080] 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 [ 33.311609] RSP: 002b:00007ffcd9d3cb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.312674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa803e31d82 [ 33.313675] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa80326b000 [ 33.314682] RBP: 00007fa80326b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.315683] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a83748db20 [ 33.316655] R13: 00007ffcd9d3cb90 R14: 00007ffcd9d3cbc0 R15: 00007ffcd9d3cf20 [ 33.317659] [ 33.317987] [ 33.318228] Allocated by task 213: [ 33.318719] kasan_save_stack+0x22/0x50 [ 33.319316] kasan_set_track+0x25/0x30 [ 33.319872] __kasan_slab_alloc+0x59/0x70 [ 33.320486] kmem_cache_alloc+0x16b/0x370 [ 33.321061] vm_area_dup+0x20/0x160 [ 33.321687] __split_vma+0x170/0x950 [ 33.322478] split_vma+0xc6/0x110 [ 33.323073] mprotect_fixup+0x8d2/0xb30 [ 33.323744] do_mprotect_pkey+0x87e/0xd40 [ 33.324415] __x64_sys_mprotect+0x78/0xc0 [ 33.325095] do_syscall_64+0x3f/0x90 [ 33.325711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.326544] [ 33.326835] Freed by task 213: [ 33.327362] kasan_save_stack+0x22/0x50 [ 33.328037] kasan_set_track+0x25/0x30 [ 33.328691] kasan_save_free_info+0x2b/0x50 [ 33.329384] __kasan_slab_free+0x10a/0x190 [ 33.330084] kmem_cache_free+0x10d/0x4d0 [ 33.330761] rcu_core+0x8c8/0x2860 [ 33.331371] __do_softirq+0x1b7/0x7d4 [ 33.332012] [ 33.332294] Last potentially related work creation: [ 33.333065] kasan_save_stack+0x22/0x50 [ 33.333739] __kasan_record_aux_stack+0x8e/0xa0 [ 33.334476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.335339] remove_vma+0x139/0x170 [ 33.335942] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.336683] do_vmi_munmap+0x1f1/0x2b0 [ 33.337332] __vm_munmap+0x138/0x3a0 [ 33.337957] __x64_sys_munmap+0x59/0x80 [ 33.338619] do_syscall_64+0x3f/0x90 [ 33.339260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.340114] [ 33.340401] The buggy address belongs to the object at ffff888015b171d0 [ 33.340401] which belongs to the cache vm_area_struct of size 168 [ 33.342256] The buggy address is located 88 bytes inside of [ 33.342256] freed 168-byte region [ffff888015b171d0, ffff888015b17278) [ 33.343947] [ 33.344191] The buggy address belongs to the physical page: [ 33.344952] page:00000000307192ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b17 [ 33.346230] memcg:ffff888019dd5201 [ 33.346728] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.347485] page_type: 0xffffffff() [ 33.348006] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.349054] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dd5201 [ 33.350118] page dumped because: kasan: bad access detected [ 33.350905] [ 33.351184] Memory state around the buggy address: [ 33.351884] ffff888015b17100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.352994] ffff888015b17180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.354152] >ffff888015b17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.355308] ^ [ 33.356049] ffff888015b17280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.357208] ffff888015b17300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.358351] ================================================================== [ 33.359716] Disabling lock debugging due to kernel taint [ 35.225414] BUG: Bad rss-counter state mm:00000000bdd82f37 type:MM_FILEPAGES val:33 [ 35.226386] BUG: Bad rss-counter state mm:00000000bdd82f37 type:MM_ANONPAGES val:22 [ 35.805276] BUG: Bad rss-counter state mm:00000000786ec602 type:MM_FILEPAGES val:33 [ 35.806633] BUG: Bad rss-counter state mm:00000000786ec602 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43836' (ECDSA) to the list of known hosts. 2023/06/19 16:42:10 fuzzer started 2023/06/19 16:42:10 dialing manager at localhost:44161 2023/06/19 16:42:10 checking machine... 2023/06/19 16:42:10 checking revisions... [ 36.497429] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:42:10 testing simple program... [ 36.546311] cgroup: Unknown subsys name 'net' [ 36.607794] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:42:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffd1ffff829d3 RSI=ffffffff81454ba7 RDI=ffffe8ffffc14e98 RBP=ffffe8ffffc14e90 RSP=ffff888016d7fcc8 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000000 R11=0000000000000000 R12=ffff888019e6e000 R13=00000000000f4240 R14=ffff888019e6e000 R15=dffffc0000000000 RIP=ffffffff81454bc6 RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f310dc06700 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=00007fb508560040 CR3=000000000c696000 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=32343a3631203931206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38353238332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383532 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf8d4 RBX=ffffffff85dfc6a4 RCX=ffffffff81809910 RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a4 RSP=ffff88806cf099b8 R8 =ffffffff86137004 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f6fcdc76900 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=00007ffca1f82000 CR3=000000000dbb4000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000