syzkaller login: [ 30.200454] BUG: Bad rss-counter state mm:000000004b4eae20 type:MM_FILEPAGES val:33 [ 30.201693] BUG: Bad rss-counter state mm:000000004b4eae20 type:MM_ANONPAGES val:22 [ 30.243927] ================================================================== [ 30.245033] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.245935] Read of size 8 at addr ffff88800e253c20 by task sshd/220 [ 30.246688] [ 30.246902] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.247745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.248881] Call Trace: [ 30.249193] [ 30.249469] dump_stack_lvl+0x91/0xf0 [ 30.250007] print_report+0xcc/0x620 [ 30.250622] ? __virt_addr_valid+0x102/0x340 [ 30.251216] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251802] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.252470] kasan_report+0xbe/0xf0 [ 30.252968] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.253572] vma_interval_tree_remove+0xc75/0xec0 [ 30.254262] vma_prepare+0xc54/0x11a0 [ 30.254816] __split_vma+0x5af/0x950 [ 30.255384] ? __pfx___split_vma+0x10/0x10 [ 30.255918] ? find_held_lock+0x2c/0x110 [ 30.256442] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.257009] ? lock_is_held_type+0x9f/0x120 [ 30.257546] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.258153] ? mtree_range_walk+0x632/0x900 [ 30.258711] ? mas_walk+0x5c7/0x7c0 [ 30.259190] do_vmi_munmap+0x1f1/0x2b0 [ 30.259686] mmap_region+0x1f9/0x2660 [ 30.260159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.260668] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.261381] ? __pfx_lock_acquire+0x10/0x10 [ 30.261916] ? __pfx_mmap_region+0x10/0x10 [ 30.262441] ? security_mmap_addr+0x7d/0xa0 [ 30.262964] ? get_unmapped_area+0x1f5/0x3f0 [ 30.263516] do_mmap+0x854/0xf00 [ 30.263949] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.264445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.265006] ksys_mmap_pgoff+0x3af/0x500 [ 30.265501] do_syscall_64+0x3f/0x90 [ 30.265984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.266615] RIP: 0033:0x7f554d43dd82 [ 30.267059] 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 [ 30.269170] RSP: 002b:00007ffc3fe6c3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.270061] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f554d43dd82 [ 30.270889] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f554c877000 [ 30.271975] RBP: 00007f554c877000 R08: 0000000000000009 R09: 0000000000001000 [ 30.272835] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9630f5b20 [ 30.273662] R13: 00007ffc3fe6c3f0 R14: 00007ffc3fe6c420 R15: 00007ffc3fe6c780 [ 30.274524] [ 30.274818] [ 30.275031] Allocated by task 213: [ 30.275449] kasan_save_stack+0x22/0x50 [ 30.275951] kasan_set_track+0x25/0x30 [ 30.276434] __kasan_slab_alloc+0x59/0x70 [ 30.276955] kmem_cache_alloc+0x16b/0x370 [ 30.277456] vm_area_dup+0x20/0x160 [ 30.277904] __split_vma+0x170/0x950 [ 30.278354] split_vma+0xc6/0x110 [ 30.278787] mprotect_fixup+0x8d2/0xb30 [ 30.279275] do_mprotect_pkey+0x87e/0xd40 [ 30.279804] __x64_sys_mprotect+0x78/0xc0 [ 30.280316] do_syscall_64+0x3f/0x90 [ 30.280785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.281421] [ 30.281634] Freed by task 13: [ 30.282007] kasan_save_stack+0x22/0x50 [ 30.282502] kasan_set_track+0x25/0x30 [ 30.282985] kasan_save_free_info+0x2b/0x50 [ 30.283507] __kasan_slab_free+0x10a/0x190 [ 30.284035] kmem_cache_free+0x10d/0x4d0 [ 30.284534] rcu_core+0x8c8/0x2860 [ 30.284982] __do_softirq+0x1b7/0x7d4 [ 30.285449] [ 30.285660] Last potentially related work creation: [ 30.286240] kasan_save_stack+0x22/0x50 [ 30.286736] __kasan_record_aux_stack+0x8e/0xa0 [ 30.287290] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.287922] remove_vma+0x139/0x170 [ 30.288363] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.288925] do_vmi_munmap+0x1f1/0x2b0 [ 30.289401] __vm_munmap+0x138/0x3a0 [ 30.289862] __x64_sys_munmap+0x59/0x80 [ 30.290359] do_syscall_64+0x3f/0x90 [ 30.290837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.291460] [ 30.291669] The buggy address belongs to the object at ffff88800e253bc8 [ 30.291669] which belongs to the cache vm_area_struct of size 168 [ 30.293145] The buggy address is located 88 bytes inside of [ 30.293145] freed 168-byte region [ffff88800e253bc8, ffff88800e253c70) [ 30.294537] [ 30.294743] The buggy address belongs to the physical page: [ 30.295360] page:0000000043b03dcb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe253 [ 30.296373] memcg:ffff888013e21701 [ 30.296779] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.297395] page_type: 0xffffffff() [ 30.297820] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.298706] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013e21701 [ 30.299581] page dumped because: kasan: bad access detected [ 30.300223] [ 30.300434] Memory state around the buggy address: [ 30.301030] ffff88800e253b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.301836] ffff88800e253b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.302678] >ffff88800e253c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.303532] ^ [ 30.304064] ffff88800e253c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.304920] ffff88800e253d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.305822] ================================================================== [ 30.306828] Disabling lock debugging due to kernel taint [ 32.136000] BUG: Bad rss-counter state mm:0000000063e86109 type:MM_FILEPAGES val:33 [ 32.137352] BUG: Bad rss-counter state mm:0000000063e86109 type:MM_ANONPAGES val:22 [ 32.607167] BUG: Bad rss-counter state mm:00000000d5b55c24 type:MM_FILEPAGES val:33 [ 32.608106] BUG: Bad rss-counter state mm:00000000d5b55c24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9670' (ECDSA) to the list of known hosts. 2023/06/20 12:26:53 fuzzer started 2023/06/20 12:26:53 dialing manager at localhost:36067 2023/06/20 12:26:53 checking machine... 2023/06/20 12:26:53 checking revisions... [ 33.326885] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:26:53 testing simple program... [ 33.383776] cgroup: Unknown subsys name 'net' [ 33.427282] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:26:52 Registers: info registers vcpu 0 RAX=00000000000247f6 RBX=0000000000000001 RCX=ffffffff818e31f6 RDX=0000000000024802 RSI=0000000000008e31 RDI=ffffffff8614ed14 RBP=ffff888016bc7ad8 RSP=ffff888016bc7a10 R8 =ffffffff8614eccc R9 =ffff888016bc7ac0 R10=0000000000038001 R11=00000000000247f6 R12=ffff888016bc7ae0 R13=ffff888016bc7ac8 R14=ffff888016bc7ac1 R15=ffff888016bc7a80 RIP=ffffffff81130868 RFL=00000293 [--S-A-C] 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 00007f662c290900 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=00007f662c8480b0 CR3=000000000cad2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801463f570 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff81b4c8bf RDI=ffff88801463f57c RBP=000000000000000b RSP=ffff88801463f488 R8 =0000000000000001 R9 =ffff88801463f4e8 R10=0000000000038001 R11=00000000000246e9 R12=ffff88801463f570 R13=0000000000000000 R14=ffff888014593680 R15=0000000000000000 RIP=ffffffff813ad506 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9de03aa900 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=00007f9ddf7d27c0 CR3=000000000f5cc000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ed3633947a2f378800000000000ae988 XMM05=68d1a4195b359aae0000000000132a48 XMM06=4fda316b135da52b0000000000131838 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000