[ 39.481039] BUG: Bad rss-counter state mm:00000000f8112813 type:MM_FILEPAGES val:33 [ 39.482485] BUG: Bad rss-counter state mm:00000000f8112813 type:MM_ANONPAGES val:22 [ 39.631828] ================================================================== [ 39.632797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.633794] Read of size 8 at addr ffff88800e39e140 by task sshd/219 [ 39.634605] [ 39.634823] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.635794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.636843] Call Trace: [ 39.637175] [ 39.637460] dump_stack_lvl+0x91/0xf0 [ 39.637967] print_report+0xcc/0x620 [ 39.638471] ? __virt_addr_valid+0x102/0x340 [ 39.639045] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.639691] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.640343] kasan_report+0xbe/0xf0 [ 39.640830] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.641460] vma_interval_tree_remove+0xc75/0xec0 [ 39.642071] vma_prepare+0xc54/0x11a0 [ 39.642551] __split_vma+0x5af/0x950 [ 39.643021] ? __pfx___split_vma+0x10/0x10 [ 39.643545] ? find_held_lock+0x2c/0x110 [ 39.644064] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.644659] ? lock_is_held_type+0x9f/0x120 [ 39.645199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.645802] ? mtree_range_walk+0x632/0x900 [ 39.646370] ? mas_walk+0x5c7/0x7c0 [ 39.646873] do_vmi_munmap+0x1f1/0x2b0 [ 39.647377] mmap_region+0x1f9/0x2660 [ 39.647864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.648404] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.649151] ? __pfx_lock_acquire+0x10/0x10 [ 39.649707] ? __pfx_mmap_region+0x10/0x10 [ 39.650235] ? security_mmap_addr+0x7d/0xa0 [ 39.650767] ? get_unmapped_area+0x1f5/0x3f0 [ 39.651314] do_mmap+0x854/0xf00 [ 39.651779] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.652308] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.652869] ksys_mmap_pgoff+0x3af/0x500 [ 39.653376] do_syscall_64+0x3f/0x90 [ 39.653853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.654508] RIP: 0033:0x7f777c21fd82 [ 39.654966] 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 [ 39.657101] RSP: 002b:00007ffc631bd178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.658017] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f777c21fd82 [ 39.658871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f777b659000 [ 39.659724] RBP: 00007f777b659000 R08: 0000000000000009 R09: 0000000000001000 [ 39.660580] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579c00e5b20 [ 39.661431] R13: 00007ffc631bd190 R14: 00007ffc631bd1c0 R15: 00007ffc631bd520 [ 39.662283] [ 39.662578] [ 39.662792] Allocated by task 212: [ 39.663220] kasan_save_stack+0x22/0x50 [ 39.663723] kasan_set_track+0x25/0x30 [ 39.664233] __kasan_slab_alloc+0x59/0x70 [ 39.664758] kmem_cache_alloc+0x16b/0x370 [ 39.665277] vm_area_dup+0x20/0x160 [ 39.665739] __split_vma+0x170/0x950 [ 39.666223] split_vma+0xc6/0x110 [ 39.666678] mprotect_fixup+0x8d2/0xb30 [ 39.667201] do_mprotect_pkey+0x87e/0xd40 [ 39.667729] __x64_sys_mprotect+0x78/0xc0 [ 39.668291] do_syscall_64+0x3f/0x90 [ 39.668775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.669422] [ 39.669637] Freed by task 212: [ 39.670044] kasan_save_stack+0x22/0x50 [ 39.670562] kasan_set_track+0x25/0x30 [ 39.671065] kasan_save_free_info+0x2b/0x50 [ 39.671608] __kasan_slab_free+0x10a/0x190 [ 39.672171] kmem_cache_free+0x10d/0x4d0 [ 39.672699] rcu_core+0x8c8/0x2860 [ 39.673151] __do_softirq+0x1b7/0x7d4 [ 39.673645] [ 39.673871] Last potentially related work creation: [ 39.674480] kasan_save_stack+0x22/0x50 [ 39.674984] __kasan_record_aux_stack+0x8e/0xa0 [ 39.675559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.676218] remove_vma+0x139/0x170 [ 39.676692] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.677264] do_vmi_munmap+0x1f1/0x2b0 [ 39.677755] __vm_munmap+0x138/0x3a0 [ 39.678230] __x64_sys_munmap+0x59/0x80 [ 39.678727] do_syscall_64+0x3f/0x90 [ 39.679199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.679846] [ 39.680068] Second to last potentially related work creation: [ 39.680767] kasan_save_stack+0x22/0x50 [ 39.681280] __kasan_record_aux_stack+0x8e/0xa0 [ 39.681852] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.682503] remove_vma+0x139/0x170 [ 39.682961] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.683525] do_vmi_munmap+0x1f1/0x2b0 [ 39.684009] mmap_region+0x1f9/0x2660 [ 39.684505] do_mmap+0x854/0xf00 [ 39.684936] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.685423] ksys_mmap_pgoff+0x3af/0x500 [ 39.685935] do_syscall_64+0x3f/0x90 [ 39.686430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.687105] [ 39.687331] The buggy address belongs to the object at ffff88800e39e0e8 [ 39.687331] which belongs to the cache vm_area_struct of size 168 [ 39.688853] The buggy address is located 88 bytes inside of [ 39.688853] freed 168-byte region [ffff88800e39e0e8, ffff88800e39e190) [ 39.690280] [ 39.690502] The buggy address belongs to the physical page: [ 39.691173] page:00000000fd845b37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe39e [ 39.692278] memcg:ffff88800963dc01 [ 39.692713] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.693413] page_type: 0xffffffff() [ 39.693866] raw: 0100000000000200 ffff88800879fc80 ffffea0000404500 dead000000000003 [ 39.694791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800963dc01 [ 39.695717] page dumped because: kasan: bad access detected [ 39.696384] [ 39.696598] Memory state around the buggy address: [ 39.697185] ffff88800e39e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.698078] ffff88800e39e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.698961] >ffff88800e39e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.699852] ^ [ 39.700542] ffff88800e39e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.701434] ffff88800e39e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.702327] ================================================================== [ 39.703280] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.667380] BUG: Bad rss-counter state mm:00000000c191642e type:MM_FILEPAGES val:33 [ 41.668582] BUG: Bad rss-counter state mm:00000000c191642e type:MM_ANONPAGES val:22 [ 42.126288] BUG: Bad rss-counter state mm:00000000f72751d6 type:MM_FILEPAGES val:33 [ 42.127463] BUG: Bad rss-counter state mm:00000000f72751d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42132' (ECDSA) to the list of known hosts. 2023/06/19 23:46:38 fuzzer started 2023/06/19 23:46:38 dialing manager at localhost:44161 2023/06/19 23:46:38 checking machine... 2023/06/19 23:46:38 checking revisions... [ 42.725331] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:46:38 testing simple program... [ 42.773137] cgroup: Unknown subsys name 'net' [ 42.804034] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:46:29 Registers: info registers vcpu 0 RAX=000000000000000a RBX=ffff88806ce3a2c0 RCX=0000000000000007 RDX=dffffc0000000000 RSI=1ffff1100d9c747e RDI=ffff88806ce3a3b0 RBP=0000000000000200 RSP=ffff88806ce09e68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=0000000000000000 R13=ffff88806ce09ee8 R14=0000000000000200 R15=ffff88806ce3a360 RIP=ffffffff81377feb RFL=00000006 [-----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 00007fc5259be900 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=00007ffc83d93000 CR3=000000000c526000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fafc9c217a0 CR3=000000000cfe0000 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=2037333a36343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000