syzkaller login: [ 31.400728] BUG: Bad rss-counter state mm:00000000c2e1516a type:MM_FILEPAGES val:33 [ 31.401981] BUG: Bad rss-counter state mm:00000000c2e1516a type:MM_ANONPAGES val:22 [ 31.437042] ================================================================== [ 31.438148] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.439180] Read of size 8 at addr ffff88801a051df0 by task sshd/220 [ 31.439985] [ 31.440204] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.441073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.442192] Call Trace: [ 31.442530] [ 31.442831] dump_stack_lvl+0x91/0xf0 [ 31.443353] print_report+0xcc/0x620 [ 31.443858] ? __virt_addr_valid+0x102/0x340 [ 31.444416] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.445033] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.445659] kasan_report+0xbe/0xf0 [ 31.446155] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.446799] vma_interval_tree_remove+0xc75/0xec0 [ 31.447391] vma_prepare+0xc54/0x11a0 [ 31.447905] __split_vma+0x5af/0x950 [ 31.448395] ? __pfx___split_vma+0x10/0x10 [ 31.448921] ? find_held_lock+0x2c/0x110 [ 31.449439] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.450005] ? lock_is_held_type+0x9f/0x120 [ 31.450551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.451143] ? mtree_range_walk+0x632/0x900 [ 31.451664] ? mas_walk+0x5c7/0x7c0 [ 31.452137] do_vmi_munmap+0x1f1/0x2b0 [ 31.452621] mmap_region+0x1f9/0x2660 [ 31.453087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.453576] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.454256] ? __pfx_lock_acquire+0x10/0x10 [ 31.454759] ? __pfx_mmap_region+0x10/0x10 [ 31.455268] ? security_mmap_addr+0x7d/0xa0 [ 31.455782] ? get_unmapped_area+0x1f5/0x3f0 [ 31.456303] do_mmap+0x854/0xf00 [ 31.456723] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.457191] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.457723] ksys_mmap_pgoff+0x3af/0x500 [ 31.458204] do_syscall_64+0x3f/0x90 [ 31.458655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.459274] RIP: 0033:0x7feb6eaf6d82 [ 31.459705] 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 [ 31.461826] RSP: 002b:00007ffe0a7c12c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.462719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb6eaf6d82 [ 31.463567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb6df30000 [ 31.464441] RBP: 00007feb6df30000 R08: 0000000000000009 R09: 0000000000001000 [ 31.465291] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3c2026ec0 [ 31.466144] R13: 00007ffe0a7c12e0 R14: 00007ffe0a7c1310 R15: 00007ffe0a7c1670 [ 31.467004] [ 31.467292] [ 31.467502] Allocated by task 213: [ 31.467936] kasan_save_stack+0x22/0x50 [ 31.468441] kasan_set_track+0x25/0x30 [ 31.468933] __kasan_slab_alloc+0x59/0x70 [ 31.469450] kmem_cache_alloc+0x16b/0x370 [ 31.469964] vm_area_dup+0x20/0x160 [ 31.470414] __split_vma+0x170/0x950 [ 31.470872] split_vma+0xc6/0x110 [ 31.471318] mprotect_fixup+0x8d2/0xb30 [ 31.471824] do_mprotect_pkey+0x87e/0xd40 [ 31.472340] __x64_sys_mprotect+0x78/0xc0 [ 31.472860] do_syscall_64+0x3f/0x90 [ 31.473341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.473980] [ 31.474192] Freed by task 213: [ 31.474593] kasan_save_stack+0x22/0x50 [ 31.475087] kasan_set_track+0x25/0x30 [ 31.475575] kasan_save_free_info+0x2b/0x50 [ 31.476117] __kasan_slab_free+0x10a/0x190 [ 31.476647] kmem_cache_free+0x10d/0x4d0 [ 31.477147] rcu_core+0x8c8/0x2860 [ 31.477594] __do_softirq+0x1b7/0x7d4 [ 31.478063] [ 31.478273] Last potentially related work creation: [ 31.478860] kasan_save_stack+0x22/0x50 [ 31.479366] __kasan_record_aux_stack+0x8e/0xa0 [ 31.479945] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.480584] remove_vma+0x139/0x170 [ 31.481044] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.481596] do_vmi_munmap+0x1f1/0x2b0 [ 31.482075] __vm_munmap+0x138/0x3a0 [ 31.482539] __x64_sys_munmap+0x59/0x80 [ 31.483028] do_syscall_64+0x3f/0x90 [ 31.483501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.484147] [ 31.484366] The buggy address belongs to the object at ffff88801a051d98 [ 31.484366] which belongs to the cache vm_area_struct of size 168 [ 31.485826] The buggy address is located 88 bytes inside of [ 31.485826] freed 168-byte region [ffff88801a051d98, ffff88801a051e40) [ 31.487219] [ 31.487431] The buggy address belongs to the physical page: [ 31.488104] page:00000000689f2866 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a051 [ 31.489180] memcg:ffff88801a39be01 [ 31.489600] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.490240] page_type: 0xffffffff() [ 31.490706] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.491624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a39be01 [ 31.492542] page dumped because: kasan: bad access detected [ 31.493203] [ 31.493425] Memory state around the buggy address: [ 31.494005] ffff88801a051c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.494862] ffff88801a051d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.495720] >ffff88801a051d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.496593] ^ [ 31.497401] ffff88801a051e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.498255] ffff88801a051e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.499104] ================================================================== [ 31.500184] Disabling lock debugging due to kernel taint [ 33.442526] BUG: Bad rss-counter state mm:000000002510353e type:MM_FILEPAGES val:33 [ 33.444185] BUG: Bad rss-counter state mm:000000002510353e type:MM_ANONPAGES val:22 [ 33.902790] BUG: Bad rss-counter state mm:000000004d426833 type:MM_FILEPAGES val:33 [ 33.903980] BUG: Bad rss-counter state mm:000000004d426833 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50753' (ECDSA) to the list of known hosts. 2023/06/20 14:00:39 fuzzer started 2023/06/20 14:00:40 dialing manager at localhost:36067 2023/06/20 14:00:40 checking machine... 2023/06/20 14:00:40 checking revisions... [ 34.729812] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:00:40 testing simple program... [ 34.782302] cgroup: Unknown subsys name 'net' [ 34.822076] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:00:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888016501b40 RSI=ffff88801472fc38 RDI=ffff888010160808 RBP=ffff88801472fc38 RSP=ffff88801472fa50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88801472fc3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f73e94 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 00007ff79218d900 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=00007ff7927450b0 CR3=000000000ed42000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007ffd49aae478 CR3=000000000d8e2000 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=2039333a30303a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a30303a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000