syzkaller login: [ 30.565750] BUG: Bad rss-counter state mm:00000000f9e4fc33 type:MM_FILEPAGES val:33 [ 30.567021] BUG: Bad rss-counter state mm:00000000f9e4fc33 type:MM_ANONPAGES val:22 [ 30.735471] ================================================================== [ 30.736414] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.737402] Read of size 8 at addr ffff88800db5a058 by task sshd/221 [ 30.738377] [ 30.738614] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.739577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.740626] Call Trace: [ 30.740966] <TASK> [ 30.741265] dump_stack_lvl+0x91/0xf0 [ 30.741787] print_report+0xcc/0x620 [ 30.742291] ? __virt_addr_valid+0x102/0x340 [ 30.742869] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743534] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744187] kasan_report+0xbe/0xf0 [ 30.744684] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.745338] vma_interval_tree_remove+0xc75/0xec0 [ 30.745971] vma_prepare+0xc54/0x11a0 [ 30.746487] __split_vma+0x5af/0x950 [ 30.747010] ? __pfx___split_vma+0x10/0x10 [ 30.747579] ? find_held_lock+0x2c/0x110 [ 30.748145] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.748753] ? lock_is_held_type+0x9f/0x120 [ 30.749331] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.749984] ? mtree_range_walk+0x632/0x900 [ 30.750576] ? mas_walk+0x5c7/0x7c0 [ 30.751103] do_vmi_munmap+0x1f1/0x2b0 [ 30.751631] mmap_region+0x1f9/0x2660 [ 30.752152] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.752701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.753471] ? __pfx_lock_acquire+0x10/0x10 [ 30.754048] ? __pfx_mmap_region+0x10/0x10 [ 30.754617] ? security_mmap_addr+0x7d/0xa0 [ 30.755198] ? get_unmapped_area+0x1f5/0x3f0 [ 30.755790] do_mmap+0x854/0xf00 [ 30.756256] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.756777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.757368] ksys_mmap_pgoff+0x3af/0x500 [ 30.757899] do_syscall_64+0x3f/0x90 [ 30.758407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.759123] RIP: 0033:0x7f7c1c43ad82 [ 30.759616] 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 [ 30.761923] RSP: 002b:00007ffd30e354d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.762903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c1c43ad82 [ 30.763814] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c1b874000 [ 30.764699] RBP: 00007f7c1b874000 R08: 0000000000000009 R09: 0000000000001000 [ 30.765591] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f5deffec0 [ 30.766500] R13: 00007ffd30e354f0 R14: 00007ffd30e35520 R15: 00007ffd30e35880 [ 30.767399] </TASK> [ 30.767704] [ 30.767930] Allocated by task 214: [ 30.768380] kasan_save_stack+0x22/0x50 [ 30.768924] kasan_set_track+0x25/0x30 [ 30.769457] __kasan_slab_alloc+0x59/0x70 [ 30.770021] kmem_cache_alloc+0x16b/0x370 [ 30.770573] vm_area_dup+0x20/0x160 [ 30.771079] __split_vma+0x170/0x950 [ 30.771568] split_vma+0xc6/0x110 [ 30.772032] mprotect_fixup+0x8d2/0xb30 [ 30.772568] do_mprotect_pkey+0x87e/0xd40 [ 30.773135] __x64_sys_mprotect+0x78/0xc0 [ 30.773695] do_syscall_64+0x3f/0x90 [ 30.774209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.774905] [ 30.775139] Freed by task 214: [ 30.775564] kasan_save_stack+0x22/0x50 [ 30.776109] kasan_set_track+0x25/0x30 [ 30.776640] kasan_save_free_info+0x2b/0x50 [ 30.777217] __kasan_slab_free+0x10a/0x190 [ 30.777791] kmem_cache_free+0x10d/0x4d0 [ 30.778341] rcu_core+0x8c8/0x2860 [ 30.778822] __do_softirq+0x1b7/0x7d4 [ 30.779339] [ 30.779565] Last potentially related work creation: [ 30.780179] kasan_save_stack+0x22/0x50 [ 30.780707] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.781985] remove_vma+0x139/0x170 [ 30.782461] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783062] do_vmi_munmap+0x1f1/0x2b0 [ 30.783580] __vm_munmap+0x138/0x3a0 [ 30.784074] __x64_sys_munmap+0x59/0x80 [ 30.784596] do_syscall_64+0x3f/0x90 [ 30.785094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785771] [ 30.785997] The buggy address belongs to the object at ffff88800db5a000 [ 30.785997] which belongs to the cache vm_area_struct of size 168 [ 30.787534] The buggy address is located 88 bytes inside of [ 30.787534] freed 168-byte region [ffff88800db5a000, ffff88800db5a0a8) [ 30.788998] [ 30.789226] The buggy address belongs to the physical page: [ 30.789913] page:00000000d9773f63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb5a [ 30.791057] memcg:ffff888017e50501 [ 30.791503] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.792177] page_type: 0xffffffff() [ 30.792655] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.793619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017e50501 [ 30.794595] page dumped because: kasan: bad access detected [ 30.795322] [ 30.795557] Memory state around the buggy address: [ 30.796193] ffff88800db59f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.797119] ffff88800db59f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.798052] >ffff88800db5a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.798987] ^ [ 30.799753] ffff88800db5a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.800653] ffff88800db5a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.801548] ================================================================== [ 30.802637] Disabling lock debugging due to kernel taint [ 32.699753] BUG: Bad rss-counter state mm:00000000f1b32a6b type:MM_FILEPAGES val:33 [ 32.701406] BUG: Bad rss-counter state mm:00000000f1b32a6b type:MM_ANONPAGES val:22 [ 33.208140] BUG: Bad rss-counter state mm:0000000069323b2e type:MM_FILEPAGES val:33 [ 33.209647] BUG: Bad rss-counter state mm:0000000069323b2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14323' (ECDSA) to the list of known hosts. 2023/06/21 04:37:09 fuzzer started 2023/06/21 04:37:09 dialing manager at localhost:36067 2023/06/21 04:37:09 checking machine... 2023/06/21 04:37:09 checking revisions... [ 33.939184] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:37:09 testing simple program... [ 33.993324] cgroup: Unknown subsys name 'net' [ 34.046383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:37:08 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81809adc RDX=0000000000000003 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffff888014767a30 RSP=ffff888014767938 R8 =ffffffff86138976 R9 =ffff888014767a18 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcc0 R13=ffff888014767a20 R14=ffff888014767a19 R15=ffff8880147679d8 RIP=ffffffff8112fc20 RFL=00000216 [----AP-] 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 00007f909d09f900 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=00007f909c491b00 CR3=000000000c948000 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=cfdb2e0b2a5f237500000000000ae988 XMM05=def59683ca5ea5f10000000000133248 XMM06=c291bd5c70af25b90000000000132038 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000092cc0 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=ffffffff81807f1f RDI=ffffffff856c1fc0 RBP=ffff888016773680 RSP=ffff888015dffa10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000cc0 R15=ffffffff8184725c RIP=ffffffff81787b51 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 00007fbb4ecbc900 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=00007ffd270e1000 CR3=000000000f614000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000