[ 33.839213] BUG: Bad rss-counter state mm:000000007c259549 type:MM_FILEPAGES val:33 [ 33.840429] BUG: Bad rss-counter state mm:000000007c259549 type:MM_ANONPAGES val:22 [ 33.972465] ================================================================== [ 33.973191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.973935] Read of size 8 at addr ffff88800f065df0 by task sshd/219 [ 33.974523] [ 33.974689] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.975347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.976085] Call Trace: [ 33.976463] [ 33.976680] dump_stack_lvl+0x91/0xf0 [ 33.977045] print_report+0xcc/0x620 [ 33.977418] ? __virt_addr_valid+0x102/0x340 [ 33.977867] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.978305] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.978659] kasan_report+0xbe/0xf0 [ 33.978925] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.979271] vma_interval_tree_remove+0xc75/0xec0 [ 33.979605] vma_prepare+0xc54/0x11a0 [ 33.979869] __split_vma+0x5af/0x950 [ 33.980131] ? __pfx___split_vma+0x10/0x10 [ 33.980431] ? find_held_lock+0x2c/0x110 [ 33.980724] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.981035] ? lock_is_held_type+0x9f/0x120 [ 33.981330] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.981672] ? mtree_range_walk+0x632/0x900 [ 33.981979] ? mas_walk+0x5c7/0x7c0 [ 33.982244] do_vmi_munmap+0x1f1/0x2b0 [ 33.982532] mmap_region+0x1f9/0x2660 [ 33.982821] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.983119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.983545] ? __pfx_lock_acquire+0x10/0x10 [ 33.983861] ? __pfx_mmap_region+0x10/0x10 [ 33.984174] ? security_mmap_addr+0x7d/0xa0 [ 33.984486] ? get_unmapped_area+0x1f5/0x3f0 [ 33.984809] do_mmap+0x854/0xf00 [ 33.985058] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.985347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.985678] ksys_mmap_pgoff+0x3af/0x500 [ 33.985973] do_syscall_64+0x3f/0x90 [ 33.986253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.986630] RIP: 0033:0x7f49ef34bd82 [ 33.986894] 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 [ 33.988159] RSP: 002b:00007ffc27bea088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.988702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49ef34bd82 [ 33.989199] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49ee785000 [ 33.989727] RBP: 00007f49ee785000 R08: 0000000000000009 R09: 0000000000001000 [ 33.990216] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fad91bec0 [ 33.990716] R13: 00007ffc27bea0a0 R14: 00007ffc27bea0d0 R15: 00007ffc27bea430 [ 33.991215] [ 33.991382] [ 33.991507] Allocated by task 212: [ 33.991751] kasan_save_stack+0x22/0x50 [ 33.992041] kasan_set_track+0x25/0x30 [ 33.992330] __kasan_slab_alloc+0x59/0x70 [ 33.992637] kmem_cache_alloc+0x16b/0x370 [ 33.992945] vm_area_dup+0x20/0x160 [ 33.993216] __split_vma+0x170/0x950 [ 33.993486] split_vma+0xc6/0x110 [ 33.993749] mprotect_fixup+0x8d2/0xb30 [ 33.994035] do_mprotect_pkey+0x87e/0xd40 [ 33.994334] __x64_sys_mprotect+0x78/0xc0 [ 33.994638] do_syscall_64+0x3f/0x90 [ 33.994912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.995280] [ 33.995404] Freed by task 212: [ 33.995641] kasan_save_stack+0x22/0x50 [ 33.995936] kasan_set_track+0x25/0x30 [ 33.996219] kasan_save_free_info+0x2b/0x50 [ 33.996526] __kasan_slab_free+0x10a/0x190 [ 33.996840] kmem_cache_free+0x10d/0x4d0 [ 33.997137] rcu_core+0x8c8/0x2860 [ 33.997397] __do_softirq+0x1b7/0x7d4 [ 33.997684] [ 33.997803] Last potentially related work creation: [ 33.998138] kasan_save_stack+0x22/0x50 [ 33.998431] __kasan_record_aux_stack+0x8e/0xa0 [ 33.998763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.999137] remove_vma+0x139/0x170 [ 33.999402] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.999733] do_vmi_munmap+0x1f1/0x2b0 [ 34.000013] __vm_munmap+0x138/0x3a0 [ 34.000281] __x64_sys_munmap+0x59/0x80 [ 34.000569] do_syscall_64+0x3f/0x90 [ 34.000852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.001227] [ 34.001352] Second to last potentially related work creation: [ 34.001754] kasan_save_stack+0x22/0x50 [ 34.002035] __kasan_record_aux_stack+0x8e/0xa0 [ 34.002366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.002739] remove_vma+0x139/0x170 [ 34.002999] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.003326] do_vmi_munmap+0x1f1/0x2b0 [ 34.003606] mmap_region+0x1f9/0x2660 [ 34.003883] do_mmap+0x854/0xf00 [ 34.004130] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.004417] ksys_mmap_pgoff+0x3af/0x500 [ 34.004717] do_syscall_64+0x3f/0x90 [ 34.004986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.005370] [ 34.005491] The buggy address belongs to the object at ffff88800f065d98 [ 34.005491] which belongs to the cache vm_area_struct of size 168 [ 34.006355] The buggy address is located 88 bytes inside of [ 34.006355] freed 168-byte region [ffff88800f065d98, ffff88800f065e40) [ 34.007178] [ 34.007306] The buggy address belongs to the physical page: [ 34.007695] page:0000000095a146fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf065 [ 34.008320] memcg:ffff88801419bf01 [ 34.008572] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.008981] page_type: 0xffffffff() [ 34.009241] raw: 0100000000000200 ffff88800879fc80 ffffea000038fc00 dead000000000009 [ 34.009778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801419bf01 [ 34.010304] page dumped because: kasan: bad access detected [ 34.010694] [ 34.010821] Memory state around the buggy address: [ 34.011153] ffff88800f065c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.011670] ffff88800f065d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.012165] >ffff88800f065d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.012667] ^ [ 34.013132] ffff88800f065e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.013639] ffff88800f065e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.014154] ================================================================== [ 34.014681] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.907295] BUG: Bad rss-counter state mm:00000000ec416126 type:MM_FILEPAGES val:33 [ 36.908309] BUG: Bad rss-counter state mm:00000000ec416126 type:MM_ANONPAGES val:22 [ 37.369725] BUG: Bad rss-counter state mm:00000000e2f09011 type:MM_FILEPAGES val:33 [ 37.370818] BUG: Bad rss-counter state mm:00000000e2f09011 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15519' (ECDSA) to the list of known hosts. 2023/06/19 14:48:00 fuzzer started 2023/06/19 14:48:01 dialing manager at localhost:44161 2023/06/19 14:48:01 checking machine... 2023/06/19 14:48:01 checking revisions... [ 38.110352] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:48:01 testing simple program... [ 38.169507] cgroup: Unknown subsys name 'net' [ 38.228273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:47:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88807ffdc000 RCX=0000000000000000 RDX=1ffff11002cf2173 RSI=0000000000000008 RDI=ffff888016790b98 RBP=ffff888016790000 RSP=ffff888008d7fc68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000006 R13=00000000ffffee48 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8182e096 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 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=00007fa8e34878d0 CR3=000000000d622000 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=2030303a38343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a38343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=00007fffc48006a0 RCX=00007f0403813500 RDX=0000000100000000 RSI=00007fffc4800540 RDI=0000000000000009 RBP=00007fffc48007d0 RSP=00007fffc4800540 R8 =0000000000000000 R9 =00007fffc48006d0 R10=000000000000002c R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000002c R15=0000000000000000 RIP=00007f0403c2ca82 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f04030a1900 00000000 00000000 GS =0000 0000000000000000 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=00005620f4cb4a1c CR3=000000000c99a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000