[ 24.146176] BUG: Bad rss-counter state mm:000000005dcd8e05 type:MM_FILEPAGES val:33 [ 24.147381] BUG: Bad rss-counter state mm:000000005dcd8e05 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.203426] ================================================================== [ 24.204339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.205289] Read of size 8 at addr ffff88800e181310 by task sshd/218 [ 24.206234] [ 24.206455] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.207358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.208405] Call Trace: [ 24.208729] <TASK> [ 24.209033] dump_stack_lvl+0x91/0xf0 [ 24.209545] print_report+0xcc/0x620 [ 24.210048] ? __virt_addr_valid+0x102/0x340 [ 24.210627] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.211311] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.211938] kasan_report+0xbe/0xf0 [ 24.212443] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.213106] vma_interval_tree_remove+0xc75/0xec0 [ 24.213726] vma_prepare+0xc54/0x11a0 [ 24.214236] __split_vma+0x5af/0x950 [ 24.214736] ? __pfx___split_vma+0x10/0x10 [ 24.215300] ? find_held_lock+0x2c/0x110 [ 24.215835] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.216434] ? lock_is_held_type+0x9f/0x120 [ 24.216999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.217641] ? mtree_range_walk+0x632/0x900 [ 24.218213] ? mas_walk+0x5c7/0x7c0 [ 24.218720] do_vmi_munmap+0x1f1/0x2b0 [ 24.219247] mmap_region+0x1f9/0x2660 [ 24.219746] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.220281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.221030] ? __pfx_lock_acquire+0x10/0x10 [ 24.221578] ? __pfx_mmap_region+0x10/0x10 [ 24.222126] ? security_mmap_addr+0x7d/0xa0 [ 24.222727] ? get_unmapped_area+0x1f5/0x3f0 [ 24.223309] do_mmap+0x854/0xf00 [ 24.223761] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.224285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.224879] ksys_mmap_pgoff+0x3af/0x500 [ 24.225425] do_syscall_64+0x3f/0x90 [ 24.225935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.226601] RIP: 0033:0x7f501f7b5d82 [ 24.227091] 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 [ 24.229305] RSP: 002b:00007fff7dc58708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.230241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f501f7b5d82 [ 24.231137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f501ebef000 [ 24.232041] RBP: 00007f501ebef000 R08: 0000000000000009 R09: 0000000000001000 [ 24.232913] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614ee80aec0 [ 24.233780] R13: 00007fff7dc58720 R14: 00007fff7dc58750 R15: 00007fff7dc58ab0 [ 24.234658] </TASK> [ 24.234978] [ 24.235196] Allocated by task 211: [ 24.235643] kasan_save_stack+0x22/0x50 [ 24.236157] kasan_set_track+0x25/0x30 [ 24.236672] __kasan_slab_alloc+0x59/0x70 [ 24.237199] kmem_cache_alloc+0x16b/0x370 [ 24.237729] vm_area_dup+0x20/0x160 [ 24.238186] __split_vma+0x170/0x950 [ 24.238679] split_vma+0xc6/0x110 [ 24.239125] mprotect_fixup+0x8d2/0xb30 [ 24.239646] do_mprotect_pkey+0x87e/0xd40 [ 24.240172] __x64_sys_mprotect+0x78/0xc0 [ 24.240717] do_syscall_64+0x3f/0x90 [ 24.241216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.241883] [ 24.242102] Freed by task 209: [ 24.242505] kasan_save_stack+0x22/0x50 [ 24.243052] kasan_set_track+0x25/0x30 [ 24.243550] kasan_save_free_info+0x2b/0x50 [ 24.244098] __kasan_slab_free+0x10a/0x190 [ 24.244632] kmem_cache_free+0x10d/0x4d0 [ 24.245157] rcu_core+0x8c8/0x2860 [ 24.245606] __do_softirq+0x1b7/0x7d4 [ 24.246101] [ 24.246316] Last potentially related work creation: [ 24.246987] kasan_save_stack+0x22/0x50 [ 24.247545] __kasan_record_aux_stack+0x8e/0xa0 [ 24.248163] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.248851] remove_vma+0x139/0x170 [ 24.249300] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.249872] do_vmi_munmap+0x1f1/0x2b0 [ 24.250361] __vm_munmap+0x138/0x3a0 [ 24.250847] __x64_sys_munmap+0x59/0x80 [ 24.251354] do_syscall_64+0x3f/0x90 [ 24.251827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.252496] [ 24.252713] The buggy address belongs to the object at ffff88800e1812b8 [ 24.252713] which belongs to the cache vm_area_struct of size 168 [ 24.254215] The buggy address is located 88 bytes inside of [ 24.254215] freed 168-byte region [ffff88800e1812b8, ffff88800e181360) [ 24.255704] [ 24.255931] The buggy address belongs to the physical page: [ 24.256631] page:0000000006d11fbe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe181 [ 24.257790] memcg:ffff88800dc34e01 [ 24.258258] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.258931] page_type: 0xffffffff() [ 24.259417] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c940 dead000000000008 [ 24.260409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc34e01 [ 24.261375] page dumped because: kasan: bad access detected [ 24.262070] [ 24.262307] Memory state around the buggy address: [ 24.262928] ffff88800e181200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.263854] ffff88800e181280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.264780] >ffff88800e181300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.265712] ^ [ 24.266175] ffff88800e181380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.267077] ffff88800e181400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.267936] ================================================================== [ 24.268850] Disabling lock debugging due to kernel taint [ 26.374270] BUG: Bad rss-counter state mm:00000000881de1dc type:MM_FILEPAGES val:32 [ 26.375257] BUG: Bad rss-counter state mm:00000000881de1dc type:MM_ANONPAGES val:22 [ 26.889175] BUG: Bad rss-counter state mm:00000000541c236f type:MM_FILEPAGES val:33 [ 26.890489] BUG: Bad rss-counter state mm:00000000541c236f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10186' (ECDSA) to the list of known hosts. 2023/06/21 01:46:59 fuzzer started 2023/06/21 01:46:59 dialing manager at localhost:36067 2023/06/21 01:46:59 checking machine... 2023/06/21 01:46:59 checking revisions... [ 27.660425] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:46:59 testing simple program... [ 27.715764] cgroup: Unknown subsys name 'net' [ 27.771731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:46:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc130035e8 CR3=000000000f52e000 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=2039353a36343a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a36343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f27d1c0 RSI=ffff888013ef7e18 RDI=0000000000000003 RBP=1ffff110027defbf RSP=ffff888013ef7df0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=00007ffcf94cb7a0 R13=0000000000000003 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8187bac4 RFL=00000293 [--S-A-C] 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 00007f024291b900 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=00007f0242ed0650 CR3=000000000f1ba000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000