syzkaller login: [ 43.860901] BUG: Bad rss-counter state mm:000000008c327311 type:MM_FILEPAGES val:33 [ 43.861940] BUG: Bad rss-counter state mm:000000008c327311 type:MM_ANONPAGES val:22 [ 44.040610] ================================================================== [ 44.041788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.043116] Read of size 8 at addr ffff88800e544880 by task sshd/220 [ 44.044121] [ 44.044392] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.045505] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.046779] Call Trace: [ 44.047198] [ 44.047562] dump_stack_lvl+0x91/0xf0 [ 44.048184] print_report+0xcc/0x620 [ 44.048797] ? __virt_addr_valid+0x102/0x340 [ 44.049520] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.050308] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.051100] kasan_report+0xbe/0xf0 [ 44.051705] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.052494] vma_interval_tree_remove+0xc75/0xec0 [ 44.053267] vma_prepare+0xc54/0x11a0 [ 44.053891] __split_vma+0x5af/0x950 [ 44.054484] ? __pfx___split_vma+0x10/0x10 [ 44.055146] ? find_held_lock+0x2c/0x110 [ 44.055803] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.056514] ? lock_is_held_type+0x9f/0x120 [ 44.057191] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.057986] ? mtree_range_walk+0x632/0x900 [ 44.058684] ? mas_walk+0x5c7/0x7c0 [ 44.059275] do_vmi_munmap+0x1f1/0x2b0 [ 44.059900] mmap_region+0x1f9/0x2660 [ 44.060520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.061168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.062102] ? __pfx_lock_acquire+0x10/0x10 [ 44.062781] ? __pfx_mmap_region+0x10/0x10 [ 44.063455] ? security_mmap_addr+0x7d/0xa0 [ 44.064128] ? get_unmapped_area+0x1f5/0x3f0 [ 44.064834] do_mmap+0x854/0xf00 [ 44.065395] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.066035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.066745] ksys_mmap_pgoff+0x3af/0x500 [ 44.067393] do_syscall_64+0x3f/0x90 [ 44.067993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.068821] RIP: 0033:0x7f8e6f676d82 [ 44.069410] 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 [ 44.072147] RSP: 002b:00007ffe5e194bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.073307] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e6f676d82 [ 44.074402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e6eab0000 [ 44.075490] RBP: 00007f8e6eab0000 R08: 0000000000000009 R09: 0000000000001000 [ 44.076568] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646fb464b20 [ 44.077657] R13: 00007ffe5e194c10 R14: 00007ffe5e194c40 R15: 00007ffe5e194fa0 [ 44.078744] [ 44.079113] [ 44.079384] Allocated by task 213: [ 44.079929] kasan_save_stack+0x22/0x50 [ 44.080654] kasan_set_track+0x25/0x30 [ 44.081290] __kasan_slab_alloc+0x59/0x70 [ 44.081961] kmem_cache_alloc+0x16b/0x370 [ 44.082614] vm_area_dup+0x20/0x160 [ 44.083173] __split_vma+0x170/0x950 [ 44.083655] split_vma+0xc6/0x110 [ 44.084108] mprotect_fixup+0x8d2/0xb30 [ 44.084640] do_mprotect_pkey+0x87e/0xd40 [ 44.085167] __x64_sys_mprotect+0x78/0xc0 [ 44.085712] do_syscall_64+0x3f/0x90 [ 44.086189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.086835] [ 44.087056] Freed by task 213: [ 44.087452] kasan_save_stack+0x22/0x50 [ 44.087958] kasan_set_track+0x25/0x30 [ 44.088456] kasan_save_free_info+0x2b/0x50 [ 44.088991] __kasan_slab_free+0x10a/0x190 [ 44.089541] kmem_cache_free+0x10d/0x4d0 [ 44.090054] rcu_core+0x8c8/0x2860 [ 44.090505] __do_softirq+0x1b7/0x7d4 [ 44.090989] [ 44.091210] Last potentially related work creation: [ 44.091801] kasan_save_stack+0x22/0x50 [ 44.092315] __kasan_record_aux_stack+0x8e/0xa0 [ 44.092892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.093543] remove_vma+0x139/0x170 [ 44.094016] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.094610] do_vmi_munmap+0x1f1/0x2b0 [ 44.095114] __vm_munmap+0x138/0x3a0 [ 44.095612] __x64_sys_munmap+0x59/0x80 [ 44.096130] do_syscall_64+0x3f/0x90 [ 44.096631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.097305] [ 44.097543] The buggy address belongs to the object at ffff88800e544828 [ 44.097543] which belongs to the cache vm_area_struct of size 168 [ 44.099089] The buggy address is located 88 bytes inside of [ 44.099089] freed 168-byte region [ffff88800e544828, ffff88800e5448d0) [ 44.100590] [ 44.100817] The buggy address belongs to the physical page: [ 44.101531] page:00000000e64c43b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe544 [ 44.102674] memcg:ffff88800e34b001 [ 44.103120] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.103789] page_type: 0xffffffff() [ 44.104262] raw: 0100000000000200 ffff88800879fc80 ffffea00005752c0 dead000000000004 [ 44.105230] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e34b001 [ 44.106184] page dumped because: kasan: bad access detected [ 44.106889] [ 44.107114] Memory state around the buggy address: [ 44.107724] ffff88800e544780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 44.108625] ffff88800e544800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 44.109539] >ffff88800e544880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 44.110436] ^ [ 44.110867] ffff88800e544900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.111764] ffff88800e544980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 44.112661] ================================================================== [ 44.114194] Disabling lock debugging due to kernel taint [ 46.592756] BUG: Bad rss-counter state mm:00000000deb35361 type:MM_FILEPAGES val:33 [ 46.593850] BUG: Bad rss-counter state mm:00000000deb35361 type:MM_ANONPAGES val:22 [ 47.177658] BUG: Bad rss-counter state mm:0000000084313d41 type:MM_FILEPAGES val:33 [ 47.178828] BUG: Bad rss-counter state mm:0000000084313d41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44576' (ECDSA) to the list of known hosts. 2023/06/20 06:04:24 fuzzer started 2023/06/20 06:04:24 dialing manager at localhost:44161 2023/06/20 06:04:24 checking machine... 2023/06/20 06:04:24 checking revisions... [ 47.848033] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:04:24 testing simple program... [ 47.898801] cgroup: Unknown subsys name 'net' [ 47.965144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:04:11 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff856529e0 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c83f1 RDI=ffff888009ab55b4 RBP=00007fb2e6ce0477 RSP=ffff88800d9c7a38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007fb2e6ce0477 R13=0000000000000000 R14=ffff888009ab51c0 R15=ffff88800d631d10 RIP=ffffffff814c07f1 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 00007fb2e67ed900 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=00007fb2e6da4618 CR3=0000000018242000 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=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 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=00007fd7f8164730 CR3=000000000c7e8000 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=fd5fdd6cf52c7a981949e61d888d5d9e XMM02=2c67c8bc2e329bc3000000000011d328 XMM03=fb795ef6d657705600000000001240b8 XMM04=fe9a472dccb8bbc500000000000ae988 XMM05=290067bb4a2738ca00000000001349d0 XMM06=4fda316b135da52b0000000000133df8 XMM07=e042d86d42eb936e0000000000124338 XMM08=406e84a4d8a97329000000000011d388 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000