[ 63.823816] BUG: Bad rss-counter state mm:00000000c0d5b754 type:MM_FILEPAGES val:33 [ 63.825043] BUG: Bad rss-counter state mm:00000000c0d5b754 type:MM_ANONPAGES val:22 [ 63.986049] ================================================================== [ 63.987165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.988313] Read of size 8 at addr ffff88801a195140 by task sshd/225 [ 63.989276] [ 63.989640] CPU: 1 PID: 225 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.990923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.992160] Call Trace: [ 63.992575] [ 63.992929] dump_stack_lvl+0x91/0xf0 [ 63.993528] print_report+0xcc/0x620 [ 63.994110] ? __virt_addr_valid+0x102/0x340 [ 63.994807] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.995580] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.996326] kasan_report+0xbe/0xf0 [ 63.996904] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.997678] vma_interval_tree_remove+0xc75/0xec0 [ 63.998429] vma_prepare+0xc54/0x11a0 [ 63.999011] __split_vma+0x5af/0x950 [ 63.999592] ? __pfx___split_vma+0x10/0x10 [ 64.000242] ? find_held_lock+0x2c/0x110 [ 64.000890] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.001593] ? lock_is_held_type+0x9f/0x120 [ 64.002264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.003034] ? mtree_range_walk+0x632/0x900 [ 64.003715] ? mas_walk+0x5c7/0x7c0 [ 64.004294] do_vmi_munmap+0x1f1/0x2b0 [ 64.004907] mmap_region+0x1f9/0x2660 [ 64.005500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.006131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.007015] ? __pfx_lock_acquire+0x10/0x10 [ 64.007690] ? __pfx_mmap_region+0x10/0x10 [ 64.008342] ? security_mmap_addr+0x7d/0xa0 [ 64.009011] ? get_unmapped_area+0x1f5/0x3f0 [ 64.009707] do_mmap+0x854/0xf00 [ 64.010239] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.010840] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.011486] ksys_mmap_pgoff+0x3af/0x500 [ 64.011974] do_syscall_64+0x3f/0x90 [ 64.012428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.013043] RIP: 0033:0x7f59f8606d82 [ 64.013478] 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 [ 64.015462] RSP: 002b:00007ffd4ecaa018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.016305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59f8606d82 [ 64.017105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59f7a40000 [ 64.017897] RBP: 00007f59f7a40000 R08: 0000000000000009 R09: 0000000000001000 [ 64.018688] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea2eeebb20 [ 64.019479] R13: 00007ffd4ecaa030 R14: 00007ffd4ecaa060 R15: 00007ffd4ecaa3c0 [ 64.020285] [ 64.020573] [ 64.020779] Allocated by task 218: [ 64.021181] kasan_save_stack+0x22/0x50 [ 64.021663] kasan_set_track+0x25/0x30 [ 64.022157] __kasan_slab_alloc+0x59/0x70 [ 64.022668] kmem_cache_alloc+0x16b/0x370 [ 64.023177] vm_area_dup+0x20/0x160 [ 64.023636] __split_vma+0x170/0x950 [ 64.024090] split_vma+0xc6/0x110 [ 64.024526] mprotect_fixup+0x8d2/0xb30 [ 64.025029] do_mprotect_pkey+0x87e/0xd40 [ 64.025542] __x64_sys_mprotect+0x78/0xc0 [ 64.026062] do_syscall_64+0x3f/0x90 [ 64.026523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.027144] [ 64.027351] Freed by task 19: [ 64.027723] kasan_save_stack+0x22/0x50 [ 64.028216] kasan_set_track+0x25/0x30 [ 64.028709] kasan_save_free_info+0x2b/0x50 [ 64.029235] __kasan_slab_free+0x10a/0x190 [ 64.029741] kmem_cache_free+0x10d/0x4d0 [ 64.030227] rcu_core+0x8c8/0x2860 [ 64.030649] __do_softirq+0x1b7/0x7d4 [ 64.031192] [ 64.031397] Last potentially related work creation: [ 64.031945] kasan_save_stack+0x22/0x50 [ 64.032419] __kasan_record_aux_stack+0x8e/0xa0 [ 64.032966] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.033571] remove_vma+0x139/0x170 [ 64.033998] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.034528] do_vmi_munmap+0x1f1/0x2b0 [ 64.034987] __vm_munmap+0x138/0x3a0 [ 64.035433] __x64_sys_munmap+0x59/0x80 [ 64.035902] do_syscall_64+0x3f/0x90 [ 64.036347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.036964] [ 64.037169] The buggy address belongs to the object at ffff88801a1950e8 [ 64.037169] which belongs to the cache vm_area_struct of size 168 [ 64.038545] The buggy address is located 88 bytes inside of [ 64.038545] freed 168-byte region [ffff88801a1950e8, ffff88801a195190) [ 64.039869] [ 64.040076] The buggy address belongs to the physical page: [ 64.040731] page:000000007eaf82f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a195 [ 64.041805] memcg:ffff8880158d9f01 [ 64.042218] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.042855] page_type: 0xffffffff() [ 64.043302] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 64.044212] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158d9f01 [ 64.045110] page dumped because: kasan: bad access detected [ 64.045754] [ 64.045973] Memory state around the buggy address: [ 64.046547] ffff88801a195000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.047396] ffff88801a195080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 64.048242] >ffff88801a195100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.049098] ^ [ 64.049725] ffff88801a195180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 64.050571] ffff88801a195200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 64.051404] ================================================================== [ 64.052337] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 65.960143] BUG: Bad rss-counter state mm:00000000ea4b0b6d type:MM_FILEPAGES val:33 [ 65.961139] BUG: Bad rss-counter state mm:00000000ea4b0b6d type:MM_ANONPAGES val:22 [ 66.446624] BUG: Bad rss-counter state mm:000000009e12829c type:MM_FILEPAGES val:32 [ 66.447634] BUG: Bad rss-counter state mm:000000009e12829c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47233' (ECDSA) to the list of known hosts. 2023/06/19 21:06:53 fuzzer started 2023/06/19 21:06:53 dialing manager at localhost:44161 2023/06/19 21:06:53 checking machine... 2023/06/19 21:06:53 checking revisions... [ 67.167675] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:06:54 testing simple program... [ 67.224600] cgroup: Unknown subsys name 'net' [ 67.282048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:06:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d3d010 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=00000000fffc6d78 RDI=ffffffff8542aab4 RBP=ffff88806ce3a2d8 RSP=ffff88806ce09c40 R8 =00000000fffe07a0 R9 =fffffbfff0ba77da R10=0000000000007a35 R11=0000001687443488 R12=ffffffff85d3bf9c R13=ffff88806ce3a2c0 R14=1ffff1100d9c139c R15=0000000000000000 RIP=ffffffff8450bdc0 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=00007fb479a8c610 CR3=0000000010270000 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=2033353a36303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a36303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00003c0740 RBX=ffff88800f01d280 RCX=ffff888008ebc500 RDX=ffff88808f01d280 RSI=ffff88800c688000 RDI=ffff888008ebc780 RBP=0000000000000000 RSP=ffff88801cc97988 R8 =ffff88800f01d280 R9 =0000000000000000 R10=ffffea000031a200 R11=0000000080150013 R12=dffffc0000000000 R13=ffff88801cc979c8 R14=0000000000000000 R15=ffff88800c688000 RIP=ffffffff81810213 RFL=00000282 [--S----] 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 00007ff04ea23900 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=00007ffdc7bd4000 CR3=000000000ca98000 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=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