[ 31.114668] BUG: Bad rss-counter state mm:000000003d1ef558 type:MM_FILEPAGES val:33 [ 31.115864] BUG: Bad rss-counter state mm:000000003d1ef558 type:MM_ANONPAGES val:22 [ 31.279975] ================================================================== [ 31.280944] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.281911] Read of size 8 at addr ffff8880095d5b38 by task sshd/227 [ 31.282691] [ 31.282919] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.283911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.284922] Call Trace: [ 31.285256] [ 31.285541] dump_stack_lvl+0x91/0xf0 [ 31.286037] print_report+0xcc/0x620 [ 31.286536] ? __virt_addr_valid+0x102/0x340 [ 31.287089] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288351] kasan_report+0xbe/0xf0 [ 31.288852] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.289484] vma_interval_tree_remove+0xc75/0xec0 [ 31.290094] vma_prepare+0xc54/0x11a0 [ 31.290582] __split_vma+0x5af/0x950 [ 31.291069] ? __pfx___split_vma+0x10/0x10 [ 31.291601] ? find_held_lock+0x2c/0x110 [ 31.292130] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.292735] ? lock_is_held_type+0x9f/0x120 [ 31.293275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.293895] ? mtree_range_walk+0x632/0x900 [ 31.294458] ? mas_walk+0x5c7/0x7c0 [ 31.294942] do_vmi_munmap+0x1f1/0x2b0 [ 31.295439] mmap_region+0x1f9/0x2660 [ 31.295933] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.296457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.297180] ? __pfx_lock_acquire+0x10/0x10 [ 31.297716] ? __pfx_mmap_region+0x10/0x10 [ 31.298250] ? security_mmap_addr+0x7d/0xa0 [ 31.298780] ? get_unmapped_area+0x1f5/0x3f0 [ 31.299334] do_mmap+0x854/0xf00 [ 31.299779] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.300285] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.300854] ksys_mmap_pgoff+0x3af/0x500 [ 31.301367] do_syscall_64+0x3f/0x90 [ 31.301851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.302499] RIP: 0033:0x7fec663edd82 [ 31.302959] 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 [ 31.305116] RSP: 002b:00007fff7e91fcc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.306037] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec663edd82 [ 31.306898] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec65827000 [ 31.307753] RBP: 00007fec65827000 R08: 0000000000000009 R09: 0000000000001000 [ 31.308620] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2102b7f70 [ 31.309477] R13: 00007fff7e91fce0 R14: 00007fff7e91fd10 R15: 00007fff7e920070 [ 31.310339] [ 31.310641] [ 31.310859] Allocated by task 213: [ 31.311292] kasan_save_stack+0x22/0x50 [ 31.311807] kasan_set_track+0x25/0x30 [ 31.312320] __kasan_slab_alloc+0x59/0x70 [ 31.312855] kmem_cache_alloc+0x16b/0x370 [ 31.313377] vm_area_dup+0x20/0x160 [ 31.313835] __split_vma+0x170/0x950 [ 31.314310] split_vma+0xc6/0x110 [ 31.314758] mprotect_fixup+0x8d2/0xb30 [ 31.315260] do_mprotect_pkey+0x87e/0xd40 [ 31.315794] __x64_sys_mprotect+0x78/0xc0 [ 31.316346] do_syscall_64+0x3f/0x90 [ 31.316827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317470] [ 31.317686] Freed by task 213: [ 31.318086] kasan_save_stack+0x22/0x50 [ 31.318591] kasan_set_track+0x25/0x30 [ 31.319089] kasan_save_free_info+0x2b/0x50 [ 31.319623] __kasan_slab_free+0x10a/0x190 [ 31.320162] kmem_cache_free+0x10d/0x4d0 [ 31.320679] rcu_core+0x8c8/0x2860 [ 31.321128] __do_softirq+0x1b7/0x7d4 [ 31.321618] [ 31.321837] Last potentially related work creation: [ 31.322432] kasan_save_stack+0x22/0x50 [ 31.322945] __kasan_record_aux_stack+0x8e/0xa0 [ 31.323523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.324184] remove_vma+0x139/0x170 [ 31.324635] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.325196] do_vmi_munmap+0x1f1/0x2b0 [ 31.325689] __vm_munmap+0x138/0x3a0 [ 31.326163] __x64_sys_munmap+0x59/0x80 [ 31.326667] do_syscall_64+0x3f/0x90 [ 31.327150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327812] [ 31.328030] The buggy address belongs to the object at ffff8880095d5ae0 [ 31.328030] which belongs to the cache vm_area_struct of size 168 [ 31.329524] The buggy address is located 88 bytes inside of [ 31.329524] freed 168-byte region [ffff8880095d5ae0, ffff8880095d5b88) [ 31.330946] [ 31.331164] The buggy address belongs to the physical page: [ 31.331840] page:00000000e25e9bcd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95d5 [ 31.332943] memcg:ffff88800df9fc01 [ 31.333373] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.334084] page_type: 0xffffffff() [ 31.334540] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.335472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df9fc01 [ 31.336405] page dumped because: kasan: bad access detected [ 31.337072] [ 31.337292] Memory state around the buggy address: [ 31.337877] ffff8880095d5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.338745] ffff8880095d5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.339605] >ffff8880095d5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.340462] ^ [ 31.341075] ffff8880095d5b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.341944] ffff8880095d5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.342799] ================================================================== [ 31.343822] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.294676] BUG: Bad rss-counter state mm:0000000065191083 type:MM_FILEPAGES val:33 [ 33.296240] BUG: Bad rss-counter state mm:0000000065191083 type:MM_ANONPAGES val:22 [ 33.770806] BUG: Bad rss-counter state mm:00000000952b5933 type:MM_FILEPAGES val:33 [ 33.771882] BUG: Bad rss-counter state mm:00000000952b5933 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8357' (ECDSA) to the list of known hosts. 2023/06/21 01:03:41 fuzzer started 2023/06/21 01:03:42 dialing manager at localhost:36067 2023/06/21 01:03:42 checking machine... 2023/06/21 01:03:42 checking revisions... [ 34.455860] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:03:42 testing simple program... [ 34.487847] cgroup: Unknown subsys name 'net' [ 34.518900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:03:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=ffff8880145c51c0 RSI=ffffffff814d447a RDI=0000000000000010 RBP=0000000000000000 RSP=ffff88800da07de0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000002 R11=0000000000000000 R12=0000000000000010 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0864 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 00007f4dcca9e900 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=00007f4dcbf20260 CR3=000000000cbfc000 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=4ff14460a6126f9b2d465a3bc9a83e09 XMM02=000000000011b5d8eff9b2d0a8fce9cb XMM03=000000000011b6a82c67c8bc2e329bc3 XMM04=036ab6e433185a0d00000000000ae988 XMM05=959e28d3d1bced6e0000000000132608 XMM06=52d8a3181339b2ab0000000000131340 XMM07=fb795ef6d65770560000000000121850 XMM08=2c67c8bc2e329bc3000000000011b648 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888014648001 RBX=ffff8880146475b8 RCX=ffffffff86138e01 RDX=ffff8880146475c0 RSI=0000000000000000 RDI=ffff888014647268 RBP=ffff888014640000 RSP=ffff8880146471e8 R8 =ffffffff86138eb4 R9 =ffff888014647298 R10=0000000000038001 R11=0000000000020d9c R12=ffff8880146472b8 R13=ffff8880146472a0 R14=ffff8880146475b8 R15=ffff888014647258 RIP=ffffffff81131cd2 RFL=00000283 [--S---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 00007fd137c25900 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=00007fd1381dc618 CR3=000000001a1c8000 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