[ 42.918606] BUG: Bad rss-counter state mm:00000000ec7c3745 type:MM_FILEPAGES val:33 [ 42.920714] BUG: Bad rss-counter state mm:00000000ec7c3745 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.083987] ================================================================== [ 43.084917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.085846] Read of size 8 at addr ffff88800dfed5c8 by task sshd/218 [ 43.086648] [ 43.086864] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.087887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.088855] Call Trace: [ 43.089173] [ 43.089463] dump_stack_lvl+0x91/0xf0 [ 43.089967] print_report+0xcc/0x620 [ 43.090457] ? __virt_addr_valid+0x102/0x340 [ 43.091005] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.091624] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.092240] kasan_report+0xbe/0xf0 [ 43.092727] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.093363] vma_interval_tree_remove+0xc75/0xec0 [ 43.094011] vma_prepare+0xc54/0x11a0 [ 43.094517] __split_vma+0x5af/0x950 [ 43.095011] ? __pfx___split_vma+0x10/0x10 [ 43.095558] ? find_held_lock+0x2c/0x110 [ 43.096094] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.096672] ? lock_is_held_type+0x9f/0x120 [ 43.097231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.097857] ? mtree_range_walk+0x632/0x900 [ 43.098442] ? mas_walk+0x5c7/0x7c0 [ 43.098940] do_vmi_munmap+0x1f1/0x2b0 [ 43.099453] mmap_region+0x1f9/0x2660 [ 43.099950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.100484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.101259] ? __pfx_lock_acquire+0x10/0x10 [ 43.101815] ? __pfx_mmap_region+0x10/0x10 [ 43.102387] ? security_mmap_addr+0x7d/0xa0 [ 43.102921] ? get_unmapped_area+0x1f5/0x3f0 [ 43.103470] do_mmap+0x854/0xf00 [ 43.103905] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.104394] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.104949] ksys_mmap_pgoff+0x3af/0x500 [ 43.105451] do_syscall_64+0x3f/0x90 [ 43.105945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.106587] RIP: 0033:0x7f8a32c77d82 [ 43.107042] 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 [ 43.109142] RSP: 002b:00007fff8d3816c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.110055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a32c77d82 [ 43.110894] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a320b1000 [ 43.111735] RBP: 00007f8a320b1000 R08: 0000000000000009 R09: 0000000000001000 [ 43.112577] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb88c7fec0 [ 43.113425] R13: 00007fff8d3816e0 R14: 00007fff8d381710 R15: 00007fff8d381a70 [ 43.114297] [ 43.114591] [ 43.114803] Allocated by task 211: [ 43.115230] kasan_save_stack+0x22/0x50 [ 43.115732] kasan_set_track+0x25/0x30 [ 43.116227] __kasan_slab_alloc+0x59/0x70 [ 43.116749] kmem_cache_alloc+0x16b/0x370 [ 43.117264] vm_area_dup+0x20/0x160 [ 43.117716] __split_vma+0x170/0x950 [ 43.118192] split_vma+0xc6/0x110 [ 43.118630] mprotect_fixup+0x8d2/0xb30 [ 43.119131] do_mprotect_pkey+0x87e/0xd40 [ 43.119647] __x64_sys_mprotect+0x78/0xc0 [ 43.120165] do_syscall_64+0x3f/0x90 [ 43.120634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.121275] [ 43.121487] Freed by task 211: [ 43.121891] kasan_save_stack+0x22/0x50 [ 43.122389] kasan_set_track+0x25/0x30 [ 43.122878] kasan_save_free_info+0x2b/0x50 [ 43.123409] __kasan_slab_free+0x10a/0x190 [ 43.123941] kmem_cache_free+0x10d/0x4d0 [ 43.124445] rcu_core+0x8c8/0x2860 [ 43.124884] __do_softirq+0x1b7/0x7d4 [ 43.125357] [ 43.125572] Last potentially related work creation: [ 43.126167] kasan_save_stack+0x22/0x50 [ 43.126669] __kasan_record_aux_stack+0x8e/0xa0 [ 43.127234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.127874] remove_vma+0x139/0x170 [ 43.128326] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.128880] do_vmi_munmap+0x1f1/0x2b0 [ 43.129415] __vm_munmap+0x138/0x3a0 [ 43.129899] __x64_sys_munmap+0x59/0x80 [ 43.130397] do_syscall_64+0x3f/0x90 [ 43.130865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.131521] [ 43.131744] The buggy address belongs to the object at ffff88800dfed570 [ 43.131744] which belongs to the cache vm_area_struct of size 168 [ 43.133244] The buggy address is located 88 bytes inside of [ 43.133244] freed 168-byte region [ffff88800dfed570, ffff88800dfed618) [ 43.134671] [ 43.134885] The buggy address belongs to the physical page: [ 43.135545] page:00000000903dbda3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfed [ 43.136622] memcg:ffff88800d9e9301 [ 43.137047] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.137746] page_type: 0xffffffff() [ 43.138203] raw: 0100000000000200 ffff88800879fc80 ffffea000036ad40 dead000000000003 [ 43.139121] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9e9301 [ 43.140023] page dumped because: kasan: bad access detected [ 43.140677] [ 43.140893] Memory state around the buggy address: [ 43.141470] ffff88800dfed480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.142338] ffff88800dfed500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 43.143185] >ffff88800dfed580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.144025] ^ [ 43.144688] ffff88800dfed600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 43.145545] ffff88800dfed680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.146407] ================================================================== [ 43.147434] Disabling lock debugging due to kernel taint [ 44.878027] BUG: Bad rss-counter state mm:0000000068251a86 type:MM_FILEPAGES val:33 [ 44.879271] BUG: Bad rss-counter state mm:0000000068251a86 type:MM_ANONPAGES val:22 [ 45.276567] BUG: Bad rss-counter state mm:00000000603ee1d4 type:MM_FILEPAGES val:33 [ 45.277971] BUG: Bad rss-counter state mm:00000000603ee1d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43106' (ECDSA) to the list of known hosts. 2023/06/19 22:18:54 fuzzer started 2023/06/19 22:18:55 dialing manager at localhost:44161 2023/06/19 22:18:55 checking machine... 2023/06/19 22:18:55 checking revisions... [ 45.984662] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:18:55 testing simple program... [ 46.042387] cgroup: Unknown subsys name 'net' [ 46.107251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:18:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff12033ab8 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f7ed96075100000556a8d753790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff83639aca RCX=0000000000000001 RDX=1ffff11002861e38 RSI=ffff88801430fb10 RDI=ffffffff83639aca RBP=ffffffff83639aca RSP=ffff88801430f118 R8 =0000000000000001 R9 =ffff88801430f1a8 R10=0000000000038001 R11=000000000008a899 R12=0000000000000001 R13=0000000000000000 R14=ffff88800caa3680 R15=0000000000092cc0 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f5a1216b900 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=00007fb500608650 CR3=000000000ca12000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d8ad9f3cb61ed5f700000000000ae988 XMM05=6184df570b7a029300000000001348c8 XMM06=806171799158d9670000000000133348 XMM07=fb795ef6d657705600000000001238b0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000