[ 24.079598] BUG: Bad rss-counter state mm:000000002a5a6fce type:MM_FILEPAGES val:33 [ 24.081574] BUG: Bad rss-counter state mm:000000002a5a6fce type:MM_ANONPAGES val:22 [ 24.238306] ================================================================== [ 24.239240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.240212] Read of size 8 at addr ffff888016ec34e0 by task sshd/219 [ 24.240985] [ 24.241209] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.242192] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.243173] Call Trace: [ 24.243493] [ 24.243804] dump_stack_lvl+0x91/0xf0 [ 24.244297] print_report+0xcc/0x620 [ 24.244773] ? __virt_addr_valid+0x102/0x340 [ 24.245331] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.245946] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.246562] kasan_report+0xbe/0xf0 [ 24.247036] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.247660] vma_interval_tree_remove+0xc75/0xec0 [ 24.248267] vma_prepare+0xc54/0x11a0 [ 24.248753] __split_vma+0x5af/0x950 [ 24.249233] ? __pfx___split_vma+0x10/0x10 [ 24.249773] ? find_held_lock+0x2c/0x110 [ 24.250294] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.250861] ? lock_is_held_type+0x9f/0x120 [ 24.251397] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.252014] ? mtree_range_walk+0x632/0x900 [ 24.252567] ? mas_walk+0x5c7/0x7c0 [ 24.253039] do_vmi_munmap+0x1f1/0x2b0 [ 24.253538] mmap_region+0x1f9/0x2660 [ 24.254026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.254540] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.255251] ? __pfx_lock_acquire+0x10/0x10 [ 24.255802] ? __pfx_mmap_region+0x10/0x10 [ 24.256334] ? security_mmap_addr+0x7d/0xa0 [ 24.256865] ? get_unmapped_area+0x1f5/0x3f0 [ 24.257415] do_mmap+0x854/0xf00 [ 24.257852] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.258357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.258916] ksys_mmap_pgoff+0x3af/0x500 [ 24.259422] do_syscall_64+0x3f/0x90 [ 24.259911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.260566] RIP: 0033:0x7fe37c986d82 [ 24.261031] 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 [ 24.263163] RSP: 002b:00007ffef2ccb5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.264088] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe37c986d82 [ 24.264938] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe37bdc0000 [ 24.265787] RBP: 00007fe37bdc0000 R08: 0000000000000009 R09: 0000000000001000 [ 24.266635] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558bb1ac0ec0 [ 24.267482] R13: 00007ffef2ccb5e0 R14: 00007ffef2ccb610 R15: 00007ffef2ccb970 [ 24.268381] [ 24.268678] [ 24.268894] Allocated by task 212: [ 24.269324] kasan_save_stack+0x22/0x50 [ 24.269831] kasan_set_track+0x25/0x30 [ 24.270346] __kasan_slab_alloc+0x59/0x70 [ 24.270874] kmem_cache_alloc+0x16b/0x370 [ 24.271393] vm_area_dup+0x20/0x160 [ 24.271856] __split_vma+0x170/0x950 [ 24.272337] split_vma+0xc6/0x110 [ 24.272787] mprotect_fixup+0x8d2/0xb30 [ 24.273294] do_mprotect_pkey+0x87e/0xd40 [ 24.273883] __x64_sys_mprotect+0x78/0xc0 [ 24.274394] do_syscall_64+0x3f/0x90 [ 24.274854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.275474] [ 24.275690] Freed by task 212: [ 24.276073] kasan_save_stack+0x22/0x50 [ 24.276579] kasan_set_track+0x25/0x30 [ 24.277065] kasan_save_free_info+0x2b/0x50 [ 24.277584] __kasan_slab_free+0x10a/0x190 [ 24.278102] kmem_cache_free+0x10d/0x4d0 [ 24.278635] rcu_core+0x8c8/0x2860 [ 24.279090] __do_softirq+0x1b7/0x7d4 [ 24.279587] [ 24.279827] Last potentially related work creation: [ 24.280420] kasan_save_stack+0x22/0x50 [ 24.280918] __kasan_record_aux_stack+0x8e/0xa0 [ 24.281493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.282139] remove_vma+0x139/0x170 [ 24.282576] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.283123] do_vmi_munmap+0x1f1/0x2b0 [ 24.283598] __vm_munmap+0x138/0x3a0 [ 24.284066] __x64_sys_munmap+0x59/0x80 [ 24.284551] do_syscall_64+0x3f/0x90 [ 24.285018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.285647] [ 24.285859] The buggy address belongs to the object at ffff888016ec3488 [ 24.285859] which belongs to the cache vm_area_struct of size 168 [ 24.287307] The buggy address is located 88 bytes inside of [ 24.287307] freed 168-byte region [ffff888016ec3488, ffff888016ec3530) [ 24.288693] [ 24.288903] The buggy address belongs to the physical page: [ 24.289549] page:00000000d383d9c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ec3 [ 24.290615] memcg:ffff88800fc2ed01 [ 24.291040] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.291690] page_type: 0xffffffff() [ 24.292132] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.293026] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc2ed01 [ 24.293905] page dumped because: kasan: bad access detected [ 24.294555] [ 24.294767] Memory state around the buggy address: [ 24.295336] ffff888016ec3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.296171] ffff888016ec3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.297013] >ffff888016ec3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.297842] ^ [ 24.298572] ffff888016ec3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.299411] ffff888016ec3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.300265] ================================================================== [ 24.301374] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.254563] BUG: Bad rss-counter state mm:00000000c212dc97 type:MM_FILEPAGES val:33 [ 26.255821] BUG: Bad rss-counter state mm:00000000c212dc97 type:MM_ANONPAGES val:22 [ 26.699554] BUG: Bad rss-counter state mm:000000008aea37af type:MM_FILEPAGES val:33 [ 26.701277] BUG: Bad rss-counter state mm:000000008aea37af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28040' (ECDSA) to the list of known hosts. 2023/06/20 03:28:56 fuzzer started 2023/06/20 03:28:57 dialing manager at localhost:44161 2023/06/20 03:28:57 checking machine... 2023/06/20 03:28:57 checking revisions... [ 27.462488] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:28:57 testing simple program... [ 27.528811] cgroup: Unknown subsys name 'net' [ 27.588611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:28:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015bb7f58 RCX=0000000000000001 RDX=1ffff11002b76f30 RSI=ffff888015bb7f48 RDI=ffff888015bb7980 RBP=0000000000000000 RSP=ffff888015bb7908 R8 =0000000000000001 R9 =ffff888015bb79b8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888015bb79d8 R13=ffff888015bb79c0 R14=ffff888015bb7f48 R15=ffff888015bb7978 RIP=ffffffff81131c83 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 00007f1b32a68900 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=00007ffefd878000 CR3=000000000eaf0000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007fd5f6ad9580 CR3=000000000e75a000 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=2036353a38323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a38323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000