[ 23.694746] BUG: Bad rss-counter state mm:00000000d6cbacd3 type:MM_FILEPAGES val:33 [ 23.696583] BUG: Bad rss-counter state mm:00000000d6cbacd3 type:MM_ANONPAGES val:22 [ 23.857710] ================================================================== [ 23.858625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.859578] Read of size 8 at addr ffff8880146fb798 by task sshd/219 [ 23.860338] [ 23.860556] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.861495] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.862469] Call Trace: [ 23.862853] [ 23.863164] dump_stack_lvl+0x91/0xf0 [ 23.863674] print_report+0xcc/0x620 [ 23.864160] ? __virt_addr_valid+0x102/0x340 [ 23.864717] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.865345] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.865982] kasan_report+0xbe/0xf0 [ 23.866465] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.867103] vma_interval_tree_remove+0xc75/0xec0 [ 23.867758] vma_prepare+0xc54/0x11a0 [ 23.868241] __split_vma+0x5af/0x950 [ 23.868730] ? __pfx___split_vma+0x10/0x10 [ 23.869266] ? find_held_lock+0x2c/0x110 [ 23.869798] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.870369] ? lock_is_held_type+0x9f/0x120 [ 23.870924] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.871540] ? mtree_range_walk+0x632/0x900 [ 23.872104] ? mas_walk+0x5c7/0x7c0 [ 23.872593] do_vmi_munmap+0x1f1/0x2b0 [ 23.873099] mmap_region+0x1f9/0x2660 [ 23.873596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.874113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.874843] ? __pfx_lock_acquire+0x10/0x10 [ 23.875389] ? __pfx_mmap_region+0x10/0x10 [ 23.875938] ? security_mmap_addr+0x7d/0xa0 [ 23.876484] ? get_unmapped_area+0x1f5/0x3f0 [ 23.877041] do_mmap+0x854/0xf00 [ 23.877489] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.878000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.878590] ksys_mmap_pgoff+0x3af/0x500 [ 23.879150] do_syscall_64+0x3f/0x90 [ 23.879653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.880343] RIP: 0033:0x7fa94d855d82 [ 23.880827] 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 [ 23.883089] RSP: 002b:00007ffe19ab1438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.884046] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa94d855d82 [ 23.884940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa94cc8f000 [ 23.885837] RBP: 00007fa94cc8f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.886726] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d1647bf70 [ 23.887621] R13: 00007ffe19ab1450 R14: 00007ffe19ab1480 R15: 00007ffe19ab17e0 [ 23.888518] [ 23.888827] [ 23.889051] Allocated by task 212: [ 23.889499] kasan_save_stack+0x22/0x50 [ 23.890027] kasan_set_track+0x25/0x30 [ 23.890545] __kasan_slab_alloc+0x59/0x70 [ 23.891096] kmem_cache_alloc+0x16b/0x370 [ 23.891665] vm_area_dup+0x20/0x160 [ 23.892138] __split_vma+0x170/0x950 [ 23.892622] split_vma+0xc6/0x110 [ 23.893077] mprotect_fixup+0x8d2/0xb30 [ 23.893598] do_mprotect_pkey+0x87e/0xd40 [ 23.894149] __x64_sys_mprotect+0x78/0xc0 [ 23.894693] do_syscall_64+0x3f/0x90 [ 23.895205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.895879] [ 23.896111] Freed by task 212: [ 23.896523] kasan_save_stack+0x22/0x50 [ 23.897056] kasan_set_track+0x25/0x30 [ 23.897571] kasan_save_free_info+0x2b/0x50 [ 23.898127] __kasan_slab_free+0x10a/0x190 [ 23.898690] kmem_cache_free+0x10d/0x4d0 [ 23.899235] rcu_core+0x8c8/0x2860 [ 23.899697] __do_softirq+0x1b7/0x7d4 [ 23.900200] [ 23.900420] Last potentially related work creation: [ 23.901033] kasan_save_stack+0x22/0x50 [ 23.901554] __kasan_record_aux_stack+0x8e/0xa0 [ 23.902157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.902849] remove_vma+0x139/0x170 [ 23.903344] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.903927] do_vmi_munmap+0x1f1/0x2b0 [ 23.904437] __vm_munmap+0x138/0x3a0 [ 23.904930] __x64_sys_munmap+0x59/0x80 [ 23.905451] do_syscall_64+0x3f/0x90 [ 23.905949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.906624] [ 23.906855] The buggy address belongs to the object at ffff8880146fb740 [ 23.906855] which belongs to the cache vm_area_struct of size 168 [ 23.908425] The buggy address is located 88 bytes inside of [ 23.908425] freed 168-byte region [ffff8880146fb740, ffff8880146fb7e8) [ 23.909898] [ 23.910127] The buggy address belongs to the physical page: [ 23.910822] page:00000000b634d463 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146fb [ 23.911988] memcg:ffff888010248901 [ 23.912435] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.913124] page_type: 0xffffffff() [ 23.913589] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.914558] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010248901 [ 23.915527] page dumped because: kasan: bad access detected [ 23.916217] [ 23.916444] Memory state around the buggy address: [ 23.917056] ffff8880146fb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.917954] ffff8880146fb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.918861] >ffff8880146fb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.919753] ^ [ 23.920280] ffff8880146fb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.921181] ffff8880146fb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.922086] ================================================================== [ 23.923180] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.906655] BUG: Bad rss-counter state mm:0000000095aed338 type:MM_FILEPAGES val:33 [ 25.907754] BUG: Bad rss-counter state mm:0000000095aed338 type:MM_ANONPAGES val:22 [ 26.359712] BUG: Bad rss-counter state mm:00000000c3f85f98 type:MM_FILEPAGES val:33 [ 26.360685] BUG: Bad rss-counter state mm:00000000c3f85f98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54347' (ECDSA) to the list of known hosts. 2023/06/20 22:11:47 fuzzer started 2023/06/20 22:11:47 dialing manager at localhost:36067 2023/06/20 22:11:47 checking machine... 2023/06/20 22:11:47 checking revisions... [ 27.068671] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:11:47 testing simple program... [ 27.119371] cgroup: Unknown subsys name 'net' [ 27.160415] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:11:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff888016d83680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888019fbf948 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff8880161d5140 RIP=ffffffff814c0408 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbc4e972900 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=00007ffebcd0b000 CR3=000000000edb8000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f8c1b999590 CR3=000000000d98c000 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=2036343a31313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31313a3232203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000