syzkaller login: [ 28.845874] BUG: Bad rss-counter state mm:00000000b2728217 type:MM_FILEPAGES val:33 [ 28.847009] BUG: Bad rss-counter state mm:00000000b2728217 type:MM_ANONPAGES val:22 [ 28.889583] ================================================================== [ 28.890845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.892129] Read of size 8 at addr ffff8880184735c8 by task sshd/219 [ 28.893121] [ 28.893442] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.894494] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.895734] Call Trace: [ 28.896054] [ 28.896337] dump_stack_lvl+0x91/0xf0 [ 28.896823] print_report+0xcc/0x620 [ 28.897310] ? __virt_addr_valid+0x102/0x340 [ 28.897860] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.898495] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.899116] kasan_report+0xbe/0xf0 [ 28.899593] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.900215] vma_interval_tree_remove+0xc75/0xec0 [ 28.900819] vma_prepare+0xc54/0x11a0 [ 28.901300] __split_vma+0x5af/0x950 [ 28.901805] ? __pfx___split_vma+0x10/0x10 [ 28.902505] ? find_held_lock+0x2c/0x110 [ 28.903111] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.903680] ? lock_is_held_type+0x9f/0x120 [ 28.904235] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.904863] ? mtree_range_walk+0x632/0x900 [ 28.905428] ? mas_walk+0x5c7/0x7c0 [ 28.905931] do_vmi_munmap+0x1f1/0x2b0 [ 28.906426] mmap_region+0x1f9/0x2660 [ 28.906938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.907450] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.908162] ? __pfx_lock_acquire+0x10/0x10 [ 28.908696] ? __pfx_mmap_region+0x10/0x10 [ 28.909228] ? security_mmap_addr+0x7d/0xa0 [ 28.909763] ? get_unmapped_area+0x1f5/0x3f0 [ 28.910319] do_mmap+0x854/0xf00 [ 28.910762] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.911263] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.911824] ksys_mmap_pgoff+0x3af/0x500 [ 28.912337] do_syscall_64+0x3f/0x90 [ 28.912818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913467] RIP: 0033:0x7f734a985d82 [ 28.913920] 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 [ 28.916068] RSP: 002b:00007ffdd5e62158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.916965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f734a985d82 [ 28.917809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7349dbf000 [ 28.918667] RBP: 00007f7349dbf000 R08: 0000000000000009 R09: 0000000000001000 [ 28.919520] R10: 0000000000000812 R11: 0000000000000206 R12: 000056274acebf70 [ 28.920363] R13: 00007ffdd5e62170 R14: 00007ffdd5e621a0 R15: 00007ffdd5e62500 [ 28.921225] [ 28.921521] [ 28.921734] Allocated by task 212: [ 28.922162] kasan_save_stack+0x22/0x50 [ 28.922682] kasan_set_track+0x25/0x30 [ 28.923179] __kasan_slab_alloc+0x59/0x70 [ 28.923712] kmem_cache_alloc+0x16b/0x370 [ 28.924226] vm_area_dup+0x20/0x160 [ 28.924683] __split_vma+0x170/0x950 [ 28.925152] split_vma+0xc6/0x110 [ 28.925585] mprotect_fixup+0x8d2/0xb30 [ 28.926089] do_mprotect_pkey+0x87e/0xd40 [ 28.926631] __x64_sys_mprotect+0x78/0xc0 [ 28.927155] do_syscall_64+0x3f/0x90 [ 28.927626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.928271] [ 28.928489] Freed by task 49: [ 28.928874] kasan_save_stack+0x22/0x50 [ 28.929384] kasan_set_track+0x25/0x30 [ 28.929881] kasan_save_free_info+0x2b/0x50 [ 28.930414] __kasan_slab_free+0x10a/0x190 [ 28.930956] kmem_cache_free+0x10d/0x4d0 [ 28.931457] rcu_core+0x8c8/0x2860 [ 28.931898] __do_softirq+0x1b7/0x7d4 [ 28.932378] [ 28.932603] Last potentially related work creation: [ 28.933189] kasan_save_stack+0x22/0x50 [ 28.933705] __kasan_record_aux_stack+0x8e/0xa0 [ 28.934284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.935007] remove_vma+0x139/0x170 [ 28.935453] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.936009] do_vmi_munmap+0x1f1/0x2b0 [ 28.936500] __vm_munmap+0x138/0x3a0 [ 28.936972] __x64_sys_munmap+0x59/0x80 [ 28.937470] do_syscall_64+0x3f/0x90 [ 28.937945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.938593] [ 28.938810] The buggy address belongs to the object at ffff888018473570 [ 28.938810] which belongs to the cache vm_area_struct of size 168 [ 28.940316] The buggy address is located 88 bytes inside of [ 28.940316] freed 168-byte region [ffff888018473570, ffff888018473618) [ 28.941710] [ 28.941926] The buggy address belongs to the physical page: [ 28.942607] page:00000000ea685eb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18473 [ 28.943700] memcg:ffff88801401f801 [ 28.944125] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.944815] page_type: 0xffffffff() [ 28.945266] raw: 0100000000000200 ffff8880087a0c80 ffffea000039a540 dead000000000007 [ 28.946182] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801401f801 [ 28.947084] page dumped because: kasan: bad access detected [ 28.947737] [ 28.947954] Memory state around the buggy address: [ 28.948550] ffff888018473480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.949415] ffff888018473500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 28.950282] >ffff888018473580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.951128] ^ [ 28.951798] ffff888018473600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 28.952654] ffff888018473680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.953507] ================================================================== [ 28.954485] Disabling lock debugging due to kernel taint [ 30.905756] BUG: Bad rss-counter state mm:00000000e76c18fe type:MM_FILEPAGES val:33 [ 30.906779] BUG: Bad rss-counter state mm:00000000e76c18fe type:MM_ANONPAGES val:22 [ 31.431724] BUG: Bad rss-counter state mm:00000000b9672b70 type:MM_FILEPAGES val:33 [ 31.433163] BUG: Bad rss-counter state mm:00000000b9672b70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28379' (ECDSA) to the list of known hosts. 2023/06/21 03:26:48 fuzzer started 2023/06/21 03:26:49 dialing manager at localhost:36067 2023/06/21 03:26:49 checking machine... 2023/06/21 03:26:49 checking revisions... [ 32.069432] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:26:49 testing simple program... [ 32.117783] cgroup: Unknown subsys name 'net' [ 32.155746] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:26:48 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f72bb588c70 CR3=0000000006888000 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=2038343a36323a3330203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383035373420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36323a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363b61c RBX=0000000000000008 RCX=0000000000000001 RDX=0000000000000dc0 RSI=000000000000000c RDI=ffff88801cdc7ab0 RBP=dffffc0000000000 RSP=ffff88801cdc79e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000c R13=0000000000000dc0 R14=ffff88801cdc7a70 R15=0000000000000dc0 RIP=ffffffff813ad649 RFL=00000287 [--S--PC] 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 00007ff65c309900 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=00007ff65c8c0618 CR3=000000000ecd8000 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