[ 55.397821] BUG: Bad rss-counter state mm:00000000994f1865 type:MM_FILEPAGES val:33 [ 55.398998] BUG: Bad rss-counter state mm:00000000994f1865 type:MM_ANONPAGES val:22 [ 55.552574] ================================================================== [ 55.553632] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.554869] Read of size 8 at addr ffff88800f2a7b38 by task sshd/225 [ 55.555826] [ 55.556054] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 55.556942] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.557925] Call Trace: [ 55.558258] [ 55.558547] dump_stack_lvl+0x91/0xf0 [ 55.559049] print_report+0xcc/0x620 [ 55.559542] ? __virt_addr_valid+0x102/0x340 [ 55.560100] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.560728] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.561355] kasan_report+0xbe/0xf0 [ 55.561840] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.562483] vma_interval_tree_remove+0xc75/0xec0 [ 55.563096] vma_prepare+0xc54/0x11a0 [ 55.563584] __split_vma+0x5af/0x950 [ 55.564061] ? __pfx___split_vma+0x10/0x10 [ 55.564593] ? find_held_lock+0x2c/0x110 [ 55.565129] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.565696] ? lock_is_held_type+0x9f/0x120 [ 55.566249] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.566876] ? mtree_range_walk+0x632/0x900 [ 55.567453] ? mas_walk+0x5c7/0x7c0 [ 55.567945] do_vmi_munmap+0x1f1/0x2b0 [ 55.568443] mmap_region+0x1f9/0x2660 [ 55.568934] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.569457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.570206] ? __pfx_lock_acquire+0x10/0x10 [ 55.570771] ? __pfx_mmap_region+0x10/0x10 [ 55.571343] ? security_mmap_addr+0x7d/0xa0 [ 55.571898] ? get_unmapped_area+0x1f5/0x3f0 [ 55.572473] do_mmap+0x854/0xf00 [ 55.572925] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.573453] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.574039] ksys_mmap_pgoff+0x3af/0x500 [ 55.574568] do_syscall_64+0x3f/0x90 [ 55.575074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.575785] RIP: 0033:0x7f7175426d82 [ 55.576265] 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 [ 55.578589] RSP: 002b:00007fff7e20e768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.579521] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7175426d82 [ 55.580379] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7174860000 [ 55.581229] RBP: 00007f7174860000 R08: 0000000000000009 R09: 0000000000001000 [ 55.582081] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610c7556ec0 [ 55.582929] R13: 00007fff7e20e780 R14: 00007fff7e20e7b0 R15: 00007fff7e20eb10 [ 55.583798] [ 55.584092] [ 55.584308] Allocated by task 213: [ 55.584740] kasan_save_stack+0x22/0x50 [ 55.585246] kasan_set_track+0x25/0x30 [ 55.585744] __kasan_slab_alloc+0x59/0x70 [ 55.586300] kmem_cache_alloc+0x16b/0x370 [ 55.586846] vm_area_dup+0x20/0x160 [ 55.587348] __split_vma+0x170/0x950 [ 55.587840] split_vma+0xc6/0x110 [ 55.588305] mprotect_fixup+0x8d2/0xb30 [ 55.588836] do_mprotect_pkey+0x87e/0xd40 [ 55.589402] __x64_sys_mprotect+0x78/0xc0 [ 55.589956] do_syscall_64+0x3f/0x90 [ 55.590461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.591140] [ 55.591376] Freed by task 213: [ 55.591794] kasan_save_stack+0x22/0x50 [ 55.592326] kasan_set_track+0x25/0x30 [ 55.592852] kasan_save_free_info+0x2b/0x50 [ 55.593427] __kasan_slab_free+0x10a/0x190 [ 55.593996] kmem_cache_free+0x10d/0x4d0 [ 55.594530] rcu_core+0x8c8/0x2860 [ 55.595007] __do_softirq+0x1b7/0x7d4 [ 55.595569] [ 55.595800] Last potentially related work creation: [ 55.596429] kasan_save_stack+0x22/0x50 [ 55.596958] __kasan_record_aux_stack+0x8e/0xa0 [ 55.597571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.598250] remove_vma+0x139/0x170 [ 55.598732] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.599341] do_vmi_munmap+0x1f1/0x2b0 [ 55.599865] __vm_munmap+0x138/0x3a0 [ 55.600376] __x64_sys_munmap+0x59/0x80 [ 55.600908] do_syscall_64+0x3f/0x90 [ 55.601408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.602097] [ 55.602325] The buggy address belongs to the object at ffff88800f2a7ae0 [ 55.602325] which belongs to the cache vm_area_struct of size 168 [ 55.603923] The buggy address is located 88 bytes inside of [ 55.603923] freed 168-byte region [ffff88800f2a7ae0, ffff88800f2a7b88) [ 55.605430] [ 55.605656] The buggy address belongs to the physical page: [ 55.606361] page:00000000d281831d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2a7 [ 55.607535] memcg:ffff88801680ec01 [ 55.607983] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.608671] page_type: 0xffffffff() [ 55.609153] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 55.610133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801680ec01 [ 55.611120] page dumped because: kasan: bad access detected [ 55.611826] [ 55.612051] Memory state around the buggy address: [ 55.612677] ffff88800f2a7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.613605] ffff88800f2a7a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 55.614522] >ffff88800f2a7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.615456] ^ [ 55.616113] ffff88800f2a7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 55.617029] ffff88800f2a7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 55.617948] ================================================================== [ 55.618943] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 58.130086] BUG: Bad rss-counter state mm:00000000594278b8 type:MM_FILEPAGES val:33 [ 58.131030] BUG: Bad rss-counter state mm:00000000594278b8 type:MM_ANONPAGES val:22 [ 58.692873] BUG: Bad rss-counter state mm:00000000012dde03 type:MM_FILEPAGES val:33 [ 58.694155] BUG: Bad rss-counter state mm:00000000012dde03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63002' (ECDSA) to the list of known hosts. 2023/06/21 05:24:24 fuzzer started 2023/06/21 05:24:24 dialing manager at localhost:36067 2023/06/21 05:24:24 checking machine... 2023/06/21 05:24:24 checking revisions... [ 59.355081] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:24:24 testing simple program... [ 59.405679] cgroup: Unknown subsys name 'net' [ 59.442861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:24:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff888016bff6a8 RSP=ffff888016bff5e0 R8 =0000000000000001 R9 =ffffed1002d7fec8 R10=ffff888016bff647 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f1b545db900 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=00007f1b54b90650 CR3=000000000edfa000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007f5e77f9a220 CR3=000000000d5d6000 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=e472b3860852098d304a5d45f0c88725 XMM02=000000000011b398eff9b2d0a8fce9cb XMM03=000000000011b4682c67c8bc2e329bc3 XMM04=72423b73f2e3634000000000000ae988 XMM05=7b77525fcad843160000000000132b10 XMM06=ae9b264101391a5b0000000000131840 XMM07=e042d86d42eb936e0000000000122080 XMM08=2079909e3a2f3f6a000000000011b468 XMM09=00000000000000000000000000000000 XMM10=00000000002000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000