[ 34.362521] BUG: Bad rss-counter state mm:00000000f41d24aa type:MM_FILEPAGES val:33 [ 34.363702] BUG: Bad rss-counter state mm:00000000f41d24aa type:MM_ANONPAGES val:22 [ 34.438848] ================================================================== [ 34.439814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.440845] Read of size 8 at addr ffff88800d7793f8 by task sshd/219 [ 34.441656] [ 34.441885] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.442783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.443821] Call Trace: [ 34.444156] [ 34.444448] dump_stack_lvl+0x91/0xf0 [ 34.444990] print_report+0xcc/0x620 [ 34.445494] ? __virt_addr_valid+0x102/0x340 [ 34.446100] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.446760] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.447401] kasan_report+0xbe/0xf0 [ 34.447916] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.448585] vma_interval_tree_remove+0xc75/0xec0 [ 34.449238] vma_prepare+0xc54/0x11a0 [ 34.449763] __split_vma+0x5af/0x950 [ 34.450251] ? __pfx___split_vma+0x10/0x10 [ 34.450810] ? find_held_lock+0x2c/0x110 [ 34.451361] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.451960] ? lock_is_held_type+0x9f/0x120 [ 34.452527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.453209] ? mtree_range_walk+0x632/0x900 [ 34.453801] ? mas_walk+0x5c7/0x7c0 [ 34.454304] do_vmi_munmap+0x1f1/0x2b0 [ 34.454828] mmap_region+0x1f9/0x2660 [ 34.455336] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.455877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.456646] ? __pfx_lock_acquire+0x10/0x10 [ 34.457233] ? __pfx_mmap_region+0x10/0x10 [ 34.457807] ? security_mmap_addr+0x7d/0xa0 [ 34.458379] ? get_unmapped_area+0x1f5/0x3f0 [ 34.458961] do_mmap+0x854/0xf00 [ 34.459416] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.459940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.460513] ksys_mmap_pgoff+0x3af/0x500 [ 34.461056] do_syscall_64+0x3f/0x90 [ 34.461560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.462262] RIP: 0033:0x7f54dcd2ad82 [ 34.462743] 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 [ 34.464987] RSP: 002b:00007fffa024cee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.465957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54dcd2ad82 [ 34.466842] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54dc164000 [ 34.467725] RBP: 00007f54dc164000 R08: 0000000000000009 R09: 0000000000001000 [ 34.468625] R10: 0000000000000812 R11: 0000000000000206 R12: 000056417e00cf70 [ 34.469517] R13: 00007fffa024cf00 R14: 00007fffa024cf30 R15: 00007fffa024d290 [ 34.470440] [ 34.470752] [ 34.470968] Allocated by task 212: [ 34.471413] kasan_save_stack+0x22/0x50 [ 34.471932] kasan_set_track+0x25/0x30 [ 34.472429] __kasan_slab_alloc+0x59/0x70 [ 34.473000] kmem_cache_alloc+0x16b/0x370 [ 34.473542] vm_area_dup+0x20/0x160 [ 34.474019] __split_vma+0x170/0x950 [ 34.474509] split_vma+0xc6/0x110 [ 34.474973] mprotect_fixup+0x8d2/0xb30 [ 34.475496] do_mprotect_pkey+0x87e/0xd40 [ 34.476037] __x64_sys_mprotect+0x78/0xc0 [ 34.476590] do_syscall_64+0x3f/0x90 [ 34.477102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.477784] [ 34.478006] Freed by task 212: [ 34.478407] kasan_save_stack+0x22/0x50 [ 34.478953] kasan_set_track+0x25/0x30 [ 34.479478] kasan_save_free_info+0x2b/0x50 [ 34.480050] __kasan_slab_free+0x10a/0x190 [ 34.480621] kmem_cache_free+0x10d/0x4d0 [ 34.481160] rcu_core+0x8c8/0x2860 [ 34.481644] __do_softirq+0x1b7/0x7d4 [ 34.482139] [ 34.482354] Last potentially related work creation: [ 34.482976] kasan_save_stack+0x22/0x50 [ 34.483497] __kasan_record_aux_stack+0x8e/0xa0 [ 34.484108] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.484768] remove_vma+0x139/0x170 [ 34.485261] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.485858] do_vmi_munmap+0x1f1/0x2b0 [ 34.486366] __vm_munmap+0x138/0x3a0 [ 34.486876] __x64_sys_munmap+0x59/0x80 [ 34.487387] do_syscall_64+0x3f/0x90 [ 34.487879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.488527] [ 34.488758] Second to last potentially related work creation: [ 34.489452] kasan_save_stack+0x22/0x50 [ 34.489978] __kasan_record_aux_stack+0x8e/0xa0 [ 34.490574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.491231] remove_vma+0x139/0x170 [ 34.491708] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.492293] do_vmi_munmap+0x1f1/0x2b0 [ 34.492819] mmap_region+0x1f9/0x2660 [ 34.493319] do_mmap+0x854/0xf00 [ 34.493779] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.494292] ksys_mmap_pgoff+0x3af/0x500 [ 34.494849] do_syscall_64+0x3f/0x90 [ 34.495340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.496016] [ 34.496294] The buggy address belongs to the object at ffff88800d7793a0 [ 34.496294] which belongs to the cache vm_area_struct of size 168 [ 34.498215] The buggy address is located 88 bytes inside of [ 34.498215] freed 168-byte region [ffff88800d7793a0, ffff88800d779448) [ 34.500035] [ 34.500308] The buggy address belongs to the physical page: [ 34.501187] page:0000000091f7c5d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd779 [ 34.502641] memcg:ffff88800dbeb301 [ 34.503203] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.504064] page_type: 0xffffffff() [ 34.504673] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.505918] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbeb301 [ 34.507129] page dumped because: kasan: bad access detected [ 34.508020] [ 34.508301] Memory state around the buggy address: [ 34.509101] ffff88800d779280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.510174] ffff88800d779300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.511129] >ffff88800d779380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.512254] ^ [ 34.513428] ffff88800d779400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.514577] ffff88800d779480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.515704] ================================================================== [ 34.517070] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.421427] BUG: Bad rss-counter state mm:000000007a16a997 type:MM_FILEPAGES val:33 [ 36.423588] BUG: Bad rss-counter state mm:000000007a16a997 type:MM_ANONPAGES val:22 [ 36.980270] BUG: Bad rss-counter state mm:00000000ad83d445 type:MM_FILEPAGES val:33 [ 36.981281] BUG: Bad rss-counter state mm:00000000ad83d445 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10773' (ECDSA) to the list of known hosts. 2023/06/19 14:39:13 fuzzer started 2023/06/19 14:39:13 dialing manager at localhost:44161 2023/06/19 14:39:13 checking machine... 2023/06/19 14:39:13 checking revisions... [ 37.694566] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:39:13 testing simple program... [ 37.737735] cgroup: Unknown subsys name 'net' [ 37.828137] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:39:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8207beda RDX=ffff888016448000 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000000004 RSP=ffff88800ec2fd40 R8 =0000000000000005 R9 =0000000000000001 R10=00000000ffffffff R11=0000000000000000 R12=00000000ffffffff R13=00007fd1080341d0 R14=1ffff11001d85fb2 R15=ffff88800ec2fec8 RIP=ffffffff814c0388 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 00007fd112132700 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=00007ffe6b8e4e18 CR3=000000000eb4a000 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=2032313a39333a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a39333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e7c4ec0 RCX=0000000000000000 RDX=ffff888019fc3680 RSI=ffffffff837982a0 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff8880144d7800 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000001 R14=ffff88800f712000 R15=0000000000000000 RIP=ffffffff837982dd 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 00007f23af896900 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=00007f23afe4d618 CR3=000000001a2ee000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000