[ 25.843791] BUG: Bad rss-counter state mm:00000000d75dfe6a type:MM_FILEPAGES val:33 [ 25.844995] BUG: Bad rss-counter state mm:00000000d75dfe6a type:MM_ANONPAGES val:22 [ 25.996987] ================================================================== [ 25.997885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.998830] Read of size 8 at addr ffff88800dd556b0 by task sshd/219 [ 25.999606] [ 25.999824] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.000875] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.001882] Call Trace: [ 26.002209] <TASK> [ 26.002521] dump_stack_lvl+0x91/0xf0 [ 26.003030] print_report+0xcc/0x620 [ 26.003539] ? __virt_addr_valid+0x102/0x340 [ 26.004110] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.004750] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.005369] kasan_report+0xbe/0xf0 [ 26.005847] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.006479] vma_interval_tree_remove+0xc75/0xec0 [ 26.007096] vma_prepare+0xc54/0x11a0 [ 26.007583] __split_vma+0x5af/0x950 [ 26.008056] ? __pfx___split_vma+0x10/0x10 [ 26.008583] ? find_held_lock+0x2c/0x110 [ 26.009110] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.009692] ? lock_is_held_type+0x9f/0x120 [ 26.010232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.010838] ? mtree_range_walk+0x632/0x900 [ 26.011409] ? mas_walk+0x5c7/0x7c0 [ 26.011887] do_vmi_munmap+0x1f1/0x2b0 [ 26.012376] mmap_region+0x1f9/0x2660 [ 26.012851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.013358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.014080] ? __pfx_lock_acquire+0x10/0x10 [ 26.014612] ? __pfx_mmap_region+0x10/0x10 [ 26.015147] ? security_mmap_addr+0x7d/0xa0 [ 26.015682] ? get_unmapped_area+0x1f5/0x3f0 [ 26.016232] do_mmap+0x854/0xf00 [ 26.016672] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.017164] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.017719] ksys_mmap_pgoff+0x3af/0x500 [ 26.018221] do_syscall_64+0x3f/0x90 [ 26.018692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.019342] RIP: 0033:0x7f4393946d82 [ 26.019809] 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 [ 26.021931] RSP: 002b:00007ffdce86f258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.022823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4393946d82 [ 26.023680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4392d80000 [ 26.024522] RBP: 00007f4392d80000 R08: 0000000000000009 R09: 0000000000001000 [ 26.025364] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556920969ec0 [ 26.026208] R13: 00007ffdce86f270 R14: 00007ffdce86f2a0 R15: 00007ffdce86f600 [ 26.027098] </TASK> [ 26.027389] [ 26.027613] Allocated by task 212: [ 26.028050] kasan_save_stack+0x22/0x50 [ 26.028553] kasan_set_track+0x25/0x30 [ 26.029049] __kasan_slab_alloc+0x59/0x70 [ 26.029568] kmem_cache_alloc+0x16b/0x370 [ 26.030097] vm_area_dup+0x20/0x160 [ 26.030546] __split_vma+0x170/0x950 [ 26.031017] split_vma+0xc6/0x110 [ 26.031467] mprotect_fixup+0x8d2/0xb30 [ 26.031981] do_mprotect_pkey+0x87e/0xd40 [ 26.032500] __x64_sys_mprotect+0x78/0xc0 [ 26.033024] do_syscall_64+0x3f/0x90 [ 26.033496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.034162] [ 26.034387] Freed by task 212: [ 26.034789] kasan_save_stack+0x22/0x50 [ 26.035318] kasan_set_track+0x25/0x30 [ 26.035838] kasan_save_free_info+0x2b/0x50 [ 26.036374] __kasan_slab_free+0x10a/0x190 [ 26.036904] kmem_cache_free+0x10d/0x4d0 [ 26.037405] rcu_core+0x8c8/0x2860 [ 26.037855] __do_softirq+0x1b7/0x7d4 [ 26.038330] [ 26.038544] Last potentially related work creation: [ 26.039148] kasan_save_stack+0x22/0x50 [ 26.039657] __kasan_record_aux_stack+0x8e/0xa0 [ 26.040238] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.040891] remove_vma+0x139/0x170 [ 26.041439] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.042012] do_vmi_munmap+0x1f1/0x2b0 [ 26.042500] __vm_munmap+0x138/0x3a0 [ 26.042964] __x64_sys_munmap+0x59/0x80 [ 26.043486] do_syscall_64+0x3f/0x90 [ 26.043969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.044602] [ 26.044820] The buggy address belongs to the object at ffff88800dd55658 [ 26.044820] which belongs to the cache vm_area_struct of size 168 [ 26.046315] The buggy address is located 88 bytes inside of [ 26.046315] freed 168-byte region [ffff88800dd55658, ffff88800dd55700) [ 26.047733] [ 26.047948] The buggy address belongs to the physical page: [ 26.048613] page:000000001728c63a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd55 [ 26.049687] memcg:ffff88800df66101 [ 26.050112] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.050759] page_type: 0xffffffff() [ 26.051217] raw: 0100000000000200 ffff88800879fc80 ffffea000035d540 dead000000000004 [ 26.052139] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df66101 [ 26.053038] page dumped because: kasan: bad access detected [ 26.053693] [ 26.053914] Memory state around the buggy address: [ 26.054487] ffff88800dd55580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.055358] ffff88800dd55600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 26.056205] >ffff88800dd55680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.057049] ^ [ 26.057633] ffff88800dd55700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 26.058478] ffff88800dd55780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 26.059339] ================================================================== [ 26.060284] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.776160] BUG: Bad rss-counter state mm:00000000a5012588 type:MM_FILEPAGES val:33 [ 28.777757] BUG: Bad rss-counter state mm:00000000a5012588 type:MM_ANONPAGES val:22 [ 29.319975] BUG: Bad rss-counter state mm:00000000b6ef36e0 type:MM_FILEPAGES val:33 [ 29.320987] BUG: Bad rss-counter state mm:00000000b6ef36e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21441' (ECDSA) to the list of known hosts. 2023/06/19 17:29:46 fuzzer started 2023/06/19 17:29:46 dialing manager at localhost:44161 2023/06/19 17:29:46 checking machine... 2023/06/19 17:29:46 checking revisions... [ 30.107375] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:29:46 testing simple program... [ 30.149150] cgroup: Unknown subsys name 'net' [ 30.187377] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:29:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880162c8c98 RCX=0000000000000000 RDX=ffff888016bc51c0 RSI=ffffffff818e3688 RDI=0000000000000005 RBP=ffff888015c57a80 RSP=ffff888015c57a48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=2f6e6962732f7273 R12=0000000000000000 R13=ffff88800f2ee680 R14=ffff88800f2ee680 R15=ffff888008ec0320 RIP=ffffffff814c081b 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 00007f577a749900 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=00007f577ad010b0 CR3=0000000019e6a000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=ffff888008c58400 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=00007fb625aec9b0 CR3=000000000c6cc000 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=318db2e892df24bb024ebaf50916ba74 XMM02=000000000011cd80eff9b2d0a8fce9cb XMM03=000000000011ce502c67c8bc2e329bc3 XMM04=3085191a73318dd400000000000ae988 XMM05=dfcdbad4f1609c370000000000133330 XMM06=535cb5cd642ef6f00000000000131da0 XMM07=e042d86d42eb936e0000000000123b10 XMM08=deaeca7bdf8b91da000000000011ce50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000