[ 33.404232] BUG: Bad rss-counter state mm:00000000a5e20155 type:MM_FILEPAGES val:33 [ 33.404750] BUG: Bad rss-counter state mm:00000000a5e20155 type:MM_ANONPAGES val:22 [ 33.518918] ================================================================== [ 33.519650] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.520374] Read of size 8 at addr ffff888019bb3968 by task sshd/219 [ 33.520963] [ 33.521134] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.521804] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.522557] Call Trace: [ 33.522910] [ 33.523129] dump_stack_lvl+0x91/0xf0 [ 33.523508] print_report+0xcc/0x620 [ 33.523881] ? __virt_addr_valid+0x102/0x340 [ 33.524317] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.524792] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.525295] kasan_report+0xbe/0xf0 [ 33.525623] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.525966] vma_interval_tree_remove+0xc75/0xec0 [ 33.526295] vma_prepare+0xc54/0x11a0 [ 33.526563] __split_vma+0x5af/0x950 [ 33.526820] ? __pfx___split_vma+0x10/0x10 [ 33.527110] ? find_held_lock+0x2c/0x110 [ 33.527400] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.527708] ? lock_is_held_type+0x9f/0x120 [ 33.528004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.528337] ? mtree_range_walk+0x632/0x900 [ 33.528647] ? mas_walk+0x5c7/0x7c0 [ 33.528905] do_vmi_munmap+0x1f1/0x2b0 [ 33.529172] mmap_region+0x1f9/0x2660 [ 33.529442] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.529731] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.530122] ? __pfx_lock_acquire+0x10/0x10 [ 33.530414] ? __pfx_mmap_region+0x10/0x10 [ 33.530703] ? security_mmap_addr+0x7d/0xa0 [ 33.530996] ? get_unmapped_area+0x1f5/0x3f0 [ 33.531294] do_mmap+0x854/0xf00 [ 33.531532] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.531801] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.532109] ksys_mmap_pgoff+0x3af/0x500 [ 33.532385] do_syscall_64+0x3f/0x90 [ 33.532648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.532999] RIP: 0033:0x7f6997dc3d82 [ 33.533249] 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 [ 33.534427] RSP: 002b:00007ffc2cd3bdc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.534926] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6997dc3d82 [ 33.535387] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69971fd000 [ 33.535852] RBP: 00007f69971fd000 R08: 0000000000000009 R09: 0000000000001000 [ 33.536314] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8f8141ec0 [ 33.536777] R13: 00007ffc2cd3bde0 R14: 00007ffc2cd3be10 R15: 00007ffc2cd3c170 [ 33.537243] [ 33.537407] [ 33.537525] Allocated by task 208: [ 33.537763] kasan_save_stack+0x22/0x50 [ 33.538041] kasan_set_track+0x25/0x30 [ 33.538308] __kasan_slab_alloc+0x59/0x70 [ 33.538597] kmem_cache_alloc+0x16b/0x370 [ 33.538876] vm_area_dup+0x20/0x160 [ 33.539127] __split_vma+0x170/0x950 [ 33.539379] split_vma+0xc6/0x110 [ 33.539620] mprotect_fixup+0x8d2/0xb30 [ 33.539895] do_mprotect_pkey+0x87e/0xd40 [ 33.540181] __x64_sys_mprotect+0x78/0xc0 [ 33.540465] do_syscall_64+0x3f/0x90 [ 33.540721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.541069] [ 33.541187] Freed by task 203: [ 33.541411] kasan_save_stack+0x22/0x50 [ 33.541687] kasan_set_track+0x25/0x30 [ 33.541957] kasan_save_free_info+0x2b/0x50 [ 33.542245] __kasan_slab_free+0x10a/0x190 [ 33.542536] kmem_cache_free+0x10d/0x4d0 [ 33.542816] rcu_core+0x8c8/0x2860 [ 33.543061] __do_softirq+0x1b7/0x7d4 [ 33.543319] [ 33.543437] Last potentially related work creation: [ 33.543760] kasan_save_stack+0x22/0x50 [ 33.544034] __kasan_record_aux_stack+0x8e/0xa0 [ 33.544347] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.544700] remove_vma+0x139/0x170 [ 33.544945] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.545247] do_vmi_munmap+0x1f1/0x2b0 [ 33.545519] __vm_munmap+0x138/0x3a0 [ 33.545773] __x64_sys_munmap+0x59/0x80 [ 33.546042] do_syscall_64+0x3f/0x90 [ 33.546300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.546650] [ 33.546766] The buggy address belongs to the object at ffff888019bb3910 [ 33.546766] which belongs to the cache vm_area_struct of size 168 [ 33.547564] The buggy address is located 88 bytes inside of [ 33.547564] freed 168-byte region [ffff888019bb3910, ffff888019bb39b8) [ 33.548329] [ 33.548449] The buggy address belongs to the physical page: [ 33.548806] page:00000000d760f03a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bb3 [ 33.549404] memcg:ffff888019b5d701 [ 33.549635] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.549985] page_type: 0xffffffff() [ 33.550230] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.550727] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b5d701 [ 33.551212] page dumped because: kasan: bad access detected [ 33.551575] [ 33.551692] Memory state around the buggy address: [ 33.552006] ffff888019bb3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.552467] ffff888019bb3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.552927] >ffff888019bb3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.553401] ^ [ 33.553826] ffff888019bb3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.554290] ffff888019bb3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.554750] ================================================================== [ 33.555272] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.419386] BUG: Bad rss-counter state mm:00000000e032f420 type:MM_FILEPAGES val:33 [ 35.420514] BUG: Bad rss-counter state mm:00000000e032f420 type:MM_ANONPAGES val:22 [ 35.926745] BUG: Bad rss-counter state mm:000000002d2f6771 type:MM_FILEPAGES val:33 [ 35.927915] BUG: Bad rss-counter state mm:000000002d2f6771 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15752' (ECDSA) to the list of known hosts. 2023/06/19 14:41:13 fuzzer started 2023/06/19 14:41:14 dialing manager at localhost:44161 2023/06/19 14:41:14 checking machine... 2023/06/19 14:41:14 checking revisions... [ 36.620598] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:41:14 testing simple program... [ 36.665579] cgroup: Unknown subsys name 'net' [ 36.706636] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:41:11 Registers: info registers vcpu 0 RAX=0000000004dd0134 RBX=ffff88800ded5480 RCX=ffff88800ded5000 RDX=0000000000000080 RSI=ffff88800ded5390 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888008d7fc80 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=ffff88800844f780 R13=ffffea0000371180 R14=ffffffff8186b9c5 R15=ffff888018981400 RIP=ffffffff8180ee70 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 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=00007fc972be6650 CR3=000000000d7b8000 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=31343a3431203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033313a3134 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303434 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001ed92f7 RBX=ffff88800f6c9788 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f6c97b8 RBP=ffff888015ab6a10 RSP=ffff88806cf09da8 R8 =0000000000000001 R9 =ffffed100d9e13a9 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888015ad3680 R14=ffffffff8117fdd9 R15=ffff888018981400 RIP=ffffffff81846362 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 00007fadfb321900 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=00007fadfa841018 CR3=00000000094a2000 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=d4000555a74e8e8bcd4137b1591f8fc2 XMM02=000000000011d2d8eff9b2d0a8fce9cb XMM03=000000000011d3a82c67c8bc2e329bc3 XMM04=2bb2a4ec3e62a0d800000000000ae988 XMM05=dca4e77aa72a5c300000000000134da0 XMM06=806171799158d9670000000000133820 XMM07=fb795ef6d65770560000000000123408 XMM08=2c67c8bc2e329bc3000000000011d348 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000