syzkaller login: [ 33.138960] BUG: Bad rss-counter state mm:000000006f89de4a type:MM_FILEPAGES val:33 [ 33.139931] BUG: Bad rss-counter state mm:000000006f89de4a type:MM_ANONPAGES val:22 [ 33.313345] ================================================================== [ 33.314263] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.315211] Read of size 8 at addr ffff88800d601140 by task sshd/219 [ 33.316097] [ 33.316323] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.317192] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.318219] Call Trace: [ 33.318539] [ 33.318834] dump_stack_lvl+0x91/0xf0 [ 33.319335] print_report+0xcc/0x620 [ 33.319824] ? __virt_addr_valid+0x102/0x340 [ 33.320379] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.321002] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.321629] kasan_report+0xbe/0xf0 [ 33.322108] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.322745] vma_interval_tree_remove+0xc75/0xec0 [ 33.323380] vma_prepare+0xc54/0x11a0 [ 33.323875] __split_vma+0x5af/0x950 [ 33.324368] ? __pfx___split_vma+0x10/0x10 [ 33.324899] ? find_held_lock+0x2c/0x110 [ 33.325435] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.325997] ? lock_is_held_type+0x9f/0x120 [ 33.326534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.327153] ? mtree_range_walk+0x632/0x900 [ 33.327729] ? mas_walk+0x5c7/0x7c0 [ 33.328216] do_vmi_munmap+0x1f1/0x2b0 [ 33.328718] mmap_region+0x1f9/0x2660 [ 33.329206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.329722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.330443] ? __pfx_lock_acquire+0x10/0x10 [ 33.330984] ? __pfx_mmap_region+0x10/0x10 [ 33.331531] ? security_mmap_addr+0x7d/0xa0 [ 33.332073] ? get_unmapped_area+0x1f5/0x3f0 [ 33.332629] do_mmap+0x854/0xf00 [ 33.333069] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.333570] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.334144] ksys_mmap_pgoff+0x3af/0x500 [ 33.334656] do_syscall_64+0x3f/0x90 [ 33.335142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.335821] RIP: 0033:0x7f9ed4d09d82 [ 33.336283] 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 [ 33.338416] RSP: 002b:00007ffd07804cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.339333] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ed4d09d82 [ 33.340196] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ed4143000 [ 33.341041] RBP: 00007f9ed4143000 R08: 0000000000000009 R09: 0000000000001000 [ 33.341900] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9c325fec0 [ 33.342759] R13: 00007ffd07804cf0 R14: 00007ffd07804d20 R15: 00007ffd07805080 [ 33.343631] [ 33.343926] [ 33.344140] Allocated by task 212: [ 33.344575] kasan_save_stack+0x22/0x50 [ 33.345085] kasan_set_track+0x25/0x30 [ 33.345579] __kasan_slab_alloc+0x59/0x70 [ 33.346105] kmem_cache_alloc+0x16b/0x370 [ 33.346620] vm_area_dup+0x20/0x160 [ 33.347076] __split_vma+0x170/0x950 [ 33.347571] split_vma+0xc6/0x110 [ 33.348015] mprotect_fixup+0x8d2/0xb30 [ 33.348527] do_mprotect_pkey+0x87e/0xd40 [ 33.349050] __x64_sys_mprotect+0x78/0xc0 [ 33.349583] do_syscall_64+0x3f/0x90 [ 33.350071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.350723] [ 33.350940] Freed by task 212: [ 33.351346] kasan_save_stack+0x22/0x50 [ 33.351866] kasan_set_track+0x25/0x30 [ 33.352364] kasan_save_free_info+0x2b/0x50 [ 33.352908] __kasan_slab_free+0x10a/0x190 [ 33.353442] kmem_cache_free+0x10d/0x4d0 [ 33.353957] rcu_core+0x8c8/0x2860 [ 33.354412] __do_softirq+0x1b7/0x7d4 [ 33.354895] [ 33.355121] Last potentially related work creation: [ 33.355729] kasan_save_stack+0x22/0x50 [ 33.356242] __kasan_record_aux_stack+0x8e/0xa0 [ 33.356824] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.357470] remove_vma+0x139/0x170 [ 33.357932] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.358484] do_vmi_munmap+0x1f1/0x2b0 [ 33.358977] __vm_munmap+0x138/0x3a0 [ 33.359474] __x64_sys_munmap+0x59/0x80 [ 33.359972] do_syscall_64+0x3f/0x90 [ 33.360464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.361113] [ 33.361327] Second to last potentially related work creation: [ 33.362010] kasan_save_stack+0x22/0x50 [ 33.362521] __kasan_record_aux_stack+0x8e/0xa0 [ 33.363106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.363761] remove_vma+0x139/0x170 [ 33.364217] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.364774] do_vmi_munmap+0x1f1/0x2b0 [ 33.365271] __vm_munmap+0x138/0x3a0 [ 33.365742] elf_map+0x26f/0x310 [ 33.366198] load_elf_binary+0xd82/0x5030 [ 33.366729] bprm_execve+0x803/0x1940 [ 33.367204] do_execveat_common+0x734/0x8e0 [ 33.367762] __x64_sys_execve+0x93/0xc0 [ 33.368265] do_syscall_64+0x3f/0x90 [ 33.368748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.369393] [ 33.369608] The buggy address belongs to the object at ffff88800d6010e8 [ 33.369608] which belongs to the cache vm_area_struct of size 168 [ 33.371088] The buggy address is located 88 bytes inside of [ 33.371088] freed 168-byte region [ffff88800d6010e8, ffff88800d601190) [ 33.372506] [ 33.372730] The buggy address belongs to the physical page: [ 33.373407] page:0000000059989e88 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd601 [ 33.374497] memcg:ffff88800e2e7201 [ 33.374927] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.375594] page_type: 0xffffffff() [ 33.376045] raw: 0100000000000200 ffff88800879fc80 ffffea0000368240 dead000000000004 [ 33.376970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2e7201 [ 33.377892] page dumped because: kasan: bad access detected [ 33.378555] [ 33.378773] Memory state around the buggy address: [ 33.379372] ffff88800d601000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.380237] ffff88800d601080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.381090] >ffff88800d601100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.381948] ^ [ 33.382593] ffff88800d601180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 33.383481] ffff88800d601200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.384334] ================================================================== [ 33.385305] Disabling lock debugging due to kernel taint [ 35.330334] BUG: Bad rss-counter state mm:00000000d3cbb279 type:MM_FILEPAGES val:33 [ 35.331394] BUG: Bad rss-counter state mm:00000000d3cbb279 type:MM_ANONPAGES val:22 [ 35.880148] BUG: Bad rss-counter state mm:00000000451afeb5 type:MM_FILEPAGES val:33 [ 35.881330] BUG: Bad rss-counter state mm:00000000451afeb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22714' (ECDSA) to the list of known hosts. 2023/06/19 11:41:02 fuzzer started 2023/06/19 11:41:02 dialing manager at localhost:44161 2023/06/19 11:41:02 checking machine... 2023/06/19 11:41:02 checking revisions... [ 36.529654] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:41:02 testing simple program... [ 36.575871] cgroup: Unknown subsys name 'net' [ 36.620346] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:59 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000008 RSI=ffff888016f27888 RDI=ffff888016f277e8 RBP=ffff888016f27840 RSP=ffff888016f27728 R8 =ffffffff86088c1e R9 =ffff888016f27828 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016f27848 R13=ffff888016f27830 R14=ffff888016f27890 R15=ffff888016f277e8 RIP=ffffffff81131014 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 00007f1056c12900 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=00007ffc41c4d000 CR3=0000000009514000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f8df736edc0 CR3=000000000ca6c000 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=e779b434a7d1e4aefa48d196a26cca00 XMM02=ec2efd57dc4c00df000000000011cae8 XMM03=84909182722f569d000000000011cbb8 XMM04=6e00da5127885a2a00000000000ae988 XMM05=dfcdbad4f1609c3700000000001348e8 XMM06=b8dd7ba3d384cb600000000000133ac0 XMM07=e042d86d42eb936e0000000000123b80 XMM08=84909182722f569d000000000011cbb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000