syzkaller login: [ 32.708068] BUG: Bad rss-counter state mm:00000000acd3898a type:MM_FILEPAGES val:33 [ 32.709266] BUG: Bad rss-counter state mm:00000000acd3898a type:MM_ANONPAGES val:22 [ 32.746178] ================================================================== [ 32.747030] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.748033] Read of size 8 at addr ffff888019ece310 by task sshd/220 [ 32.748785] [ 32.748994] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.749835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.750771] Call Trace: [ 32.751075] [ 32.751349] dump_stack_lvl+0x91/0xf0 [ 32.751834] print_report+0xcc/0x620 [ 32.752324] ? __virt_addr_valid+0x102/0x340 [ 32.752936] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.753561] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.754206] kasan_report+0xbe/0xf0 [ 32.754693] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.755319] vma_interval_tree_remove+0xc75/0xec0 [ 32.755932] vma_prepare+0xc54/0x11a0 [ 32.756430] __split_vma+0x5af/0x950 [ 32.756914] ? __pfx___split_vma+0x10/0x10 [ 32.757442] ? find_held_lock+0x2c/0x110 [ 32.757991] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.758564] ? lock_is_held_type+0x9f/0x120 [ 32.759119] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.759742] ? mtree_range_walk+0x632/0x900 [ 32.760318] ? mas_walk+0x5c7/0x7c0 [ 32.760860] do_vmi_munmap+0x1f1/0x2b0 [ 32.761360] mmap_region+0x1f9/0x2660 [ 32.761866] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.762380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.763112] ? __pfx_lock_acquire+0x10/0x10 [ 32.763658] ? __pfx_mmap_region+0x10/0x10 [ 32.764210] ? security_mmap_addr+0x7d/0xa0 [ 32.764766] ? get_unmapped_area+0x1f5/0x3f0 [ 32.765332] do_mmap+0x854/0xf00 [ 32.765806] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.766312] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.766886] ksys_mmap_pgoff+0x3af/0x500 [ 32.767413] do_syscall_64+0x3f/0x90 [ 32.767911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.768579] RIP: 0033:0x7fbb820a4d82 [ 32.769095] 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 [ 32.771291] RSP: 002b:00007ffdd03840e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.772278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb820a4d82 [ 32.773194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb814de000 [ 32.774129] RBP: 00007fbb814de000 R08: 0000000000000009 R09: 0000000000001000 [ 32.774987] R10: 0000000000000812 R11: 0000000000000206 R12: 00005645c7477f70 [ 32.775829] R13: 00007ffdd0384100 R14: 00007ffdd0384130 R15: 00007ffdd0384490 [ 32.776702] [ 32.776994] [ 32.777208] Allocated by task 213: [ 32.777631] kasan_save_stack+0x22/0x50 [ 32.778135] kasan_set_track+0x25/0x30 [ 32.778638] __kasan_slab_alloc+0x59/0x70 [ 32.779160] kmem_cache_alloc+0x16b/0x370 [ 32.779676] vm_area_dup+0x20/0x160 [ 32.780125] __split_vma+0x170/0x950 [ 32.780610] split_vma+0xc6/0x110 [ 32.781069] mprotect_fixup+0x8d2/0xb30 [ 32.781599] do_mprotect_pkey+0x87e/0xd40 [ 32.782147] __x64_sys_mprotect+0x78/0xc0 [ 32.782688] do_syscall_64+0x3f/0x90 [ 32.783186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.783863] [ 32.784089] Freed by task 213: [ 32.784506] kasan_save_stack+0x22/0x50 [ 32.785030] kasan_set_track+0x25/0x30 [ 32.785549] kasan_save_free_info+0x2b/0x50 [ 32.786111] __kasan_slab_free+0x10a/0x190 [ 32.786674] kmem_cache_free+0x10d/0x4d0 [ 32.787210] rcu_core+0x8c8/0x2860 [ 32.787684] __do_softirq+0x1b7/0x7d4 [ 32.788178] [ 32.788409] Last potentially related work creation: [ 32.789059] kasan_save_stack+0x22/0x50 [ 32.789590] __kasan_record_aux_stack+0x8e/0xa0 [ 32.790190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.790885] remove_vma+0x139/0x170 [ 32.791358] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.791944] do_vmi_munmap+0x1f1/0x2b0 [ 32.792474] __vm_munmap+0x138/0x3a0 [ 32.792960] __x64_sys_munmap+0x59/0x80 [ 32.793483] do_syscall_64+0x3f/0x90 [ 32.793985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.794657] [ 32.794883] Second to last potentially related work creation: [ 32.795605] kasan_save_stack+0x22/0x50 [ 32.796124] __kasan_record_aux_stack+0x8e/0xa0 [ 32.796740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.797412] remove_vma+0x139/0x170 [ 32.797881] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.798464] do_vmi_munmap+0x1f1/0x2b0 [ 32.798974] __vm_munmap+0x138/0x3a0 [ 32.799470] elf_map+0x26f/0x310 [ 32.799941] load_elf_binary+0xd82/0x5030 [ 32.800509] bprm_execve+0x803/0x1940 [ 32.801001] do_execveat_common+0x734/0x8e0 [ 32.801550] __x64_sys_execve+0x93/0xc0 [ 32.802063] do_syscall_64+0x3f/0x90 [ 32.802563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.803232] [ 32.803461] The buggy address belongs to the object at ffff888019ece2b8 [ 32.803461] which belongs to the cache vm_area_struct of size 168 [ 32.805035] The buggy address is located 88 bytes inside of [ 32.805035] freed 168-byte region [ffff888019ece2b8, ffff888019ece360) [ 32.806526] [ 32.806756] The buggy address belongs to the physical page: [ 32.807446] page:00000000fb01cf94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ece [ 32.808620] memcg:ffff888019ec6101 [ 32.809098] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.809834] page_type: 0xffffffff() [ 32.810314] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.811265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ec6101 [ 32.812236] page dumped because: kasan: bad access detected [ 32.812936] [ 32.813165] Memory state around the buggy address: [ 32.813774] ffff888019ece200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.814672] ffff888019ece280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.815577] >ffff888019ece300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.816510] ^ [ 32.817011] ffff888019ece380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.817911] ffff888019ece400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.818824] ================================================================== [ 32.820140] Disabling lock debugging due to kernel taint [ 34.769895] BUG: Bad rss-counter state mm:000000008cbc9848 type:MM_FILEPAGES val:33 [ 34.770880] BUG: Bad rss-counter state mm:000000008cbc9848 type:MM_ANONPAGES val:22 [ 35.340236] BUG: Bad rss-counter state mm:0000000023a28926 type:MM_FILEPAGES val:33 [ 35.341419] BUG: Bad rss-counter state mm:0000000023a28926 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3876' (ECDSA) to the list of known hosts. 2023/06/19 13:03:33 fuzzer started 2023/06/19 13:03:33 dialing manager at localhost:44161 2023/06/19 13:03:33 checking machine... 2023/06/19 13:03:33 checking revisions... [ 35.902256] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:03:33 testing simple program... [ 35.939288] cgroup: Unknown subsys name 'net' [ 35.974653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:03:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83ab4217 RDX=ffff888015ed51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801a5af500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000a0b00000a0b R12=0000000000000000 R13=0000000000000063 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c0245 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 00007f50696c1900 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=00007ffc87930000 CR3=000000000f5aa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 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=ffff888008c58400 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=00007fcaa8f706a0 CR3=000000000955a000 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=a323ec4b6af500972b41035a8ad1c2cd XMM02=ec2efd57dc4c00df000000000011dcd8 XMM03=765100cd26d42ac8000000000011dda8 XMM04=b6bc6ff1d3abb05200000000000ae988 XMM05=19e9129bd510f2350000000000135cf8 XMM06=7a104266e882ea0c0000000000134b60 XMM07=e042d86d42eb936e0000000000124cd0 XMM08=765100cd26d42ac8000000000011dda8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000