[ 23.784198] BUG: Bad rss-counter state mm:0000000087e8aabd type:MM_FILEPAGES val:33 [ 23.785210] BUG: Bad rss-counter state mm:0000000087e8aabd type:MM_ANONPAGES val:22 [ 23.943564] ================================================================== [ 23.944476] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.945427] Read of size 8 at addr ffff88800ddab140 by task sshd/220 [ 23.946226] [ 23.946446] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.947496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.948480] Call Trace: [ 23.948810] [ 23.949107] dump_stack_lvl+0x91/0xf0 [ 23.949632] print_report+0xcc/0x620 [ 23.950134] ? __virt_addr_valid+0x102/0x340 [ 23.950698] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.951318] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.951971] kasan_report+0xbe/0xf0 [ 23.952452] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.953063] vma_interval_tree_remove+0xc75/0xec0 [ 23.953681] vma_prepare+0xc54/0x11a0 [ 23.954165] __split_vma+0x5af/0x950 [ 23.954638] ? __pfx___split_vma+0x10/0x10 [ 23.955167] ? find_held_lock+0x2c/0x110 [ 23.955686] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.956248] ? lock_is_held_type+0x9f/0x120 [ 23.956798] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.957405] ? mtree_range_walk+0x632/0x900 [ 23.957981] ? mas_walk+0x5c7/0x7c0 [ 23.958460] do_vmi_munmap+0x1f1/0x2b0 [ 23.958950] mmap_region+0x1f9/0x2660 [ 23.959449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.959958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.960664] ? __pfx_lock_acquire+0x10/0x10 [ 23.961193] ? __pfx_mmap_region+0x10/0x10 [ 23.961728] ? security_mmap_addr+0x7d/0xa0 [ 23.962263] ? get_unmapped_area+0x1f5/0x3f0 [ 23.962814] do_mmap+0x854/0xf00 [ 23.963254] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.963750] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.964319] ksys_mmap_pgoff+0x3af/0x500 [ 23.964832] do_syscall_64+0x3f/0x90 [ 23.965311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.965967] RIP: 0033:0x7fae7e300d82 [ 23.966428] 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 [ 23.968548] RSP: 002b:00007ffc4bf60b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.969449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae7e300d82 [ 23.970314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae7d73a000 [ 23.971149] RBP: 00007fae7d73a000 R08: 0000000000000009 R09: 0000000000001000 [ 23.971984] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b89b930d90 [ 23.972817] R13: 00007ffc4bf60ba0 R14: 00007ffc4bf60bd0 R15: 00007ffc4bf60f30 [ 23.973675] [ 23.973961] [ 23.974176] Allocated by task 213: [ 23.974599] kasan_save_stack+0x22/0x50 [ 23.975104] kasan_set_track+0x25/0x30 [ 23.975591] __kasan_slab_alloc+0x59/0x70 [ 23.976110] kmem_cache_alloc+0x16b/0x370 [ 23.976622] vm_area_dup+0x20/0x160 [ 23.977073] __split_vma+0x170/0x950 [ 23.977548] split_vma+0xc6/0x110 [ 23.977983] mprotect_fixup+0x8d2/0xb30 [ 23.978482] do_mprotect_pkey+0x87e/0xd40 [ 23.978998] __x64_sys_mprotect+0x78/0xc0 [ 23.979521] do_syscall_64+0x3f/0x90 [ 23.980004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.980652] [ 23.980866] Freed by task 211: [ 23.981259] kasan_save_stack+0x22/0x50 [ 23.981781] kasan_set_track+0x25/0x30 [ 23.982275] kasan_save_free_info+0x2b/0x50 [ 23.982806] __kasan_slab_free+0x10a/0x190 [ 23.983336] kmem_cache_free+0x10d/0x4d0 [ 23.983842] rcu_core+0x8c8/0x2860 [ 23.984281] __do_softirq+0x1b7/0x7d4 [ 23.984763] [ 23.984978] Last potentially related work creation: [ 23.985584] kasan_save_stack+0x22/0x50 [ 23.986101] __kasan_record_aux_stack+0x8e/0xa0 [ 23.986672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.987312] remove_vma+0x139/0x170 [ 23.987818] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.988370] do_vmi_munmap+0x1f1/0x2b0 [ 23.988858] __vm_munmap+0x138/0x3a0 [ 23.989320] __x64_sys_munmap+0x59/0x80 [ 23.989883] do_syscall_64+0x3f/0x90 [ 23.990354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.990993] [ 23.991212] The buggy address belongs to the object at ffff88800ddab0e8 [ 23.991212] which belongs to the cache vm_area_struct of size 168 [ 23.992660] The buggy address is located 88 bytes inside of [ 23.992660] freed 168-byte region [ffff88800ddab0e8, ffff88800ddab190) [ 23.994070] [ 23.994287] The buggy address belongs to the physical page: [ 23.994949] page:00000000af24f00d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddab [ 23.996019] memcg:ffff88801007ea01 [ 23.996440] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.997076] page_type: 0xffffffff() [ 23.997533] raw: 0100000000000200 ffff8880087a0c80 ffffea000036a840 dead000000000002 [ 23.998450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801007ea01 [ 23.999343] page dumped because: kasan: bad access detected [ 23.999997] [ 24.000212] Memory state around the buggy address: [ 24.000785] ffff88800ddab000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.001643] ffff88800ddab080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 24.002501] >ffff88800ddab100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.003343] ^ [ 24.003977] ffff88800ddab180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.004826] ffff88800ddab200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.005675] ================================================================== [ 24.006701] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.839932] BUG: Bad rss-counter state mm:000000009c0332ff type:MM_FILEPAGES val:33 [ 26.840887] BUG: Bad rss-counter state mm:000000009c0332ff type:MM_ANONPAGES val:22 [ 27.399237] BUG: Bad rss-counter state mm:00000000a89e66e6 type:MM_FILEPAGES val:33 [ 27.400420] BUG: Bad rss-counter state mm:00000000a89e66e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55508' (ECDSA) to the list of known hosts. 2023/06/21 00:52:05 fuzzer started 2023/06/21 00:52:05 dialing manager at localhost:36067 2023/06/21 00:52:05 checking machine... 2023/06/21 00:52:05 checking revisions... [ 28.036116] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:52:05 testing simple program... [ 28.090888] cgroup: Unknown subsys name 'net' [ 28.184789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:52:05 Registers: info registers vcpu 0 RAX=1ffffffff0c0abfb RBX=ffffffff86055fdc RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864bcdf6 RDI=ffffffff86055fb8 RBP=ffffffff86055fd8 RSP=ffff88806ce099e0 R8 =ffffffff864bcdf6 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffffffff86055fe0 R13=ffffffff86055fb8 R14=ffffffff86055fd4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007f410ff60900 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=00007f410f47f000 CR3=000000000cace000 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=00000000000000000000000000000000 XMM01=3e4b3b5e70fa5a936841cf91acb7fa66 XMM02=2c67c8bc2e329bc30000000000120270 XMM03=fb795ef6d657705600000000001228e0 XMM04=0302a11630a1a9de00000000000ae988 XMM05=19e9129bd510f23500000000001326b8 XMM06=4574116590978e3d0000000000131890 XMM07=e042d86d42eb936e0000000000122bb8 XMM08=0fafe864d263cd4a00000000001202d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880165cb8b8 RBX=dffffc0000000000 RCX=ffffffff812e0135 RDX=1ffff11002cb9717 RSI=ffffffff87b89f80 RDI=ffff8880146019f0 RBP=ffff888019f829e8 RSP=ffff888008e37c78 R8 =0000000000000001 R9 =ffffed10011c6f87 R10=0000000000000003 R11=0000000000000128 R12=ffff8880146019e8 R13=fffffbfff0f713f0 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d24cf RFL=00000046 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007ffe16705000 CR3=000000001aae6000 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=563412feff00545000000000000080fe 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