syzkaller login: [ 30.284336] BUG: Bad rss-counter state mm:000000009dfbc2a2 type:MM_FILEPAGES val:33 [ 30.287355] BUG: Bad rss-counter state mm:000000009dfbc2a2 type:MM_ANONPAGES val:22 [ 30.429156] ================================================================== [ 30.430103] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.431048] Read of size 8 at addr ffff888018db16b0 by task sshd/219 [ 30.431828] [ 30.432051] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.433106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.434112] Call Trace: [ 30.434443] [ 30.434752] dump_stack_lvl+0x91/0xf0 [ 30.435271] print_report+0xcc/0x620 [ 30.435759] ? __virt_addr_valid+0x102/0x340 [ 30.436318] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.436942] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.437570] kasan_report+0xbe/0xf0 [ 30.438061] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.438691] vma_interval_tree_remove+0xc75/0xec0 [ 30.439305] vma_prepare+0xc54/0x11a0 [ 30.439801] __split_vma+0x5af/0x950 [ 30.440297] ? __pfx___split_vma+0x10/0x10 [ 30.440839] ? find_held_lock+0x2c/0x110 [ 30.441375] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.441971] ? lock_is_held_type+0x9f/0x120 [ 30.442521] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.443133] ? mtree_range_walk+0x632/0x900 [ 30.443694] ? mas_walk+0x5c7/0x7c0 [ 30.444173] do_vmi_munmap+0x1f1/0x2b0 [ 30.444677] mmap_region+0x1f9/0x2660 [ 30.445166] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.445687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.446414] ? __pfx_lock_acquire+0x10/0x10 [ 30.446947] ? __pfx_mmap_region+0x10/0x10 [ 30.447482] ? security_mmap_addr+0x7d/0xa0 [ 30.448017] ? get_unmapped_area+0x1f5/0x3f0 [ 30.448571] do_mmap+0x854/0xf00 [ 30.449009] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.449511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.450079] ksys_mmap_pgoff+0x3af/0x500 [ 30.450593] do_syscall_64+0x3f/0x90 [ 30.451073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.451731] RIP: 0033:0x7f8bf393ed82 [ 30.452188] 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 [ 30.454360] RSP: 002b:00007fff4a7c56d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.455284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8bf393ed82 [ 30.456139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8bf2d78000 [ 30.457027] RBP: 00007f8bf2d78000 R08: 0000000000000009 R09: 0000000000001000 [ 30.457863] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582b6c9aec0 [ 30.458677] R13: 00007fff4a7c56f0 R14: 00007fff4a7c5720 R15: 00007fff4a7c5a80 [ 30.459488] [ 30.459770] [ 30.459978] Allocated by task 212: [ 30.460386] kasan_save_stack+0x22/0x50 [ 30.460868] kasan_set_track+0x25/0x30 [ 30.461335] __kasan_slab_alloc+0x59/0x70 [ 30.461828] kmem_cache_alloc+0x16b/0x370 [ 30.462348] vm_area_dup+0x20/0x160 [ 30.462783] __split_vma+0x170/0x950 [ 30.463221] split_vma+0xc6/0x110 [ 30.463637] mprotect_fixup+0x8d2/0xb30 [ 30.464111] do_mprotect_pkey+0x87e/0xd40 [ 30.464614] __x64_sys_mprotect+0x78/0xc0 [ 30.465108] do_syscall_64+0x3f/0x90 [ 30.465564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.466202] [ 30.466455] Freed by task 212: [ 30.466915] kasan_save_stack+0x22/0x50 [ 30.467506] kasan_set_track+0x25/0x30 [ 30.468087] kasan_save_free_info+0x2b/0x50 [ 30.468716] __kasan_slab_free+0x10a/0x190 [ 30.469344] kmem_cache_free+0x10d/0x4d0 [ 30.469954] rcu_core+0x8c8/0x2860 [ 30.470472] __do_softirq+0x1b7/0x7d4 [ 30.471031] [ 30.471284] Last potentially related work creation: [ 30.471977] kasan_save_stack+0x22/0x50 [ 30.472572] __kasan_record_aux_stack+0x8e/0xa0 [ 30.473247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.474020] remove_vma+0x139/0x170 [ 30.474550] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.475282] do_vmi_munmap+0x1f1/0x2b0 [ 30.475852] __vm_munmap+0x138/0x3a0 [ 30.476397] __x64_sys_munmap+0x59/0x80 [ 30.476983] do_syscall_64+0x3f/0x90 [ 30.477543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.478308] [ 30.478558] The buggy address belongs to the object at ffff888018db1658 [ 30.478558] which belongs to the cache vm_area_struct of size 168 [ 30.480295] The buggy address is located 88 bytes inside of [ 30.480295] freed 168-byte region [ffff888018db1658, ffff888018db1700) [ 30.481973] [ 30.482283] The buggy address belongs to the physical page: [ 30.483197] page:00000000cee52749 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18db1 [ 30.484719] memcg:ffff888015924c01 [ 30.485312] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.486206] page_type: 0xffffffff() [ 30.486829] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.488124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015924c01 [ 30.489394] page dumped because: kasan: bad access detected [ 30.490337] [ 30.490629] Memory state around the buggy address: [ 30.491411] ffff888018db1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.492581] ffff888018db1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.493771] >ffff888018db1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.494873] ^ [ 30.495582] ffff888018db1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.496633] ffff888018db1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.497675] ================================================================== [ 30.498941] Disabling lock debugging due to kernel taint [ 32.371966] BUG: Bad rss-counter state mm:0000000049146a70 type:MM_FILEPAGES val:33 [ 32.372764] BUG: Bad rss-counter state mm:0000000049146a70 type:MM_ANONPAGES val:22 [ 32.895635] BUG: Bad rss-counter state mm:00000000808c58d9 type:MM_FILEPAGES val:33 [ 32.896688] BUG: Bad rss-counter state mm:00000000808c58d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5382' (ECDSA) to the list of known hosts. 2023/06/20 22:12:02 fuzzer started 2023/06/20 22:12:03 dialing manager at localhost:36067 2023/06/20 22:12:03 checking machine... 2023/06/20 22:12:03 checking revisions... [ 33.528954] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:12:03 testing simple program... [ 33.568090] cgroup: Unknown subsys name 'net' [ 33.609054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:12:02 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d86ea RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88801a09fa98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff838cc5a9 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180f0a8 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 00007ff3f4243900 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=00007ff3f47fa618 CR3=0000000019e0a000 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=563412feff00545000000000000080fe 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f600aabb000 CR3=000000001005c000 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=2032303a32313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a32313a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000