syzkaller login: [ 38.278886] BUG: Bad rss-counter state mm:00000000c4aff391 type:MM_FILEPAGES val:33 [ 38.279946] BUG: Bad rss-counter state mm:00000000c4aff391 type:MM_ANONPAGES val:22 [ 38.415972] ================================================================== [ 38.417084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.418203] Read of size 8 at addr ffff88800ca7ea50 by task sshd/221 [ 38.419049] [ 38.419284] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.420190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.421237] Call Trace: [ 38.421581] [ 38.421883] dump_stack_lvl+0x91/0xf0 [ 38.422395] print_report+0xcc/0x620 [ 38.422910] ? __virt_addr_valid+0x102/0x340 [ 38.423495] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.424157] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.424809] kasan_report+0xbe/0xf0 [ 38.425343] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.426022] vma_interval_tree_remove+0xc75/0xec0 [ 38.426667] vma_prepare+0xc54/0x11a0 [ 38.427180] __split_vma+0x5af/0x950 [ 38.427689] ? __pfx___split_vma+0x10/0x10 [ 38.428262] ? find_held_lock+0x2c/0x110 [ 38.428825] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.429451] ? lock_is_held_type+0x9f/0x120 [ 38.430031] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.430695] ? mtree_range_walk+0x632/0x900 [ 38.431295] ? mas_walk+0x5c7/0x7c0 [ 38.431807] do_vmi_munmap+0x1f1/0x2b0 [ 38.432339] mmap_region+0x1f9/0x2660 [ 38.432861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.433419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.434199] ? __pfx_lock_acquire+0x10/0x10 [ 38.434784] ? __pfx_mmap_region+0x10/0x10 [ 38.435347] ? security_mmap_addr+0x7d/0xa0 [ 38.435923] ? get_unmapped_area+0x1f5/0x3f0 [ 38.436507] do_mmap+0x854/0xf00 [ 38.436989] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.437519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.438127] ksys_mmap_pgoff+0x3af/0x500 [ 38.438672] do_syscall_64+0x3f/0x90 [ 38.439182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.439891] RIP: 0033:0x7fce549f2d82 [ 38.440391] 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 [ 38.442766] RSP: 002b:00007ffe5f030ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.443764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce549f2d82 [ 38.444697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce53e2c000 [ 38.445647] RBP: 00007fce53e2c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.446572] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559174da7f70 [ 38.447473] R13: 00007ffe5f030d00 R14: 00007ffe5f030d30 R15: 00007ffe5f031090 [ 38.448381] [ 38.448692] [ 38.448926] Allocated by task 214: [ 38.449391] kasan_save_stack+0x22/0x50 [ 38.449948] kasan_set_track+0x25/0x30 [ 38.450487] __kasan_slab_alloc+0x59/0x70 [ 38.451061] kmem_cache_alloc+0x16b/0x370 [ 38.451621] vm_area_dup+0x20/0x160 [ 38.452096] __split_vma+0x170/0x950 [ 38.452597] split_vma+0xc6/0x110 [ 38.453101] mprotect_fixup+0x8d2/0xb30 [ 38.453639] do_mprotect_pkey+0x87e/0xd40 [ 38.454209] __x64_sys_mprotect+0x78/0xc0 [ 38.454778] do_syscall_64+0x3f/0x90 [ 38.455283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.455964] [ 38.456192] Freed by task 204: [ 38.456622] kasan_save_stack+0x22/0x50 [ 38.457164] kasan_set_track+0x25/0x30 [ 38.457691] kasan_save_free_info+0x2b/0x50 [ 38.458256] __kasan_slab_free+0x10a/0x190 [ 38.458814] kmem_cache_free+0x10d/0x4d0 [ 38.459431] rcu_core+0x8c8/0x2860 [ 38.459903] __do_softirq+0x1b7/0x7d4 [ 38.460404] [ 38.460630] Last potentially related work creation: [ 38.461265] kasan_save_stack+0x22/0x50 [ 38.461816] __kasan_record_aux_stack+0x8e/0xa0 [ 38.462447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.463152] remove_vma+0x139/0x170 [ 38.463646] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.464254] do_vmi_munmap+0x1f1/0x2b0 [ 38.464784] __vm_munmap+0x138/0x3a0 [ 38.465304] __x64_sys_munmap+0x59/0x80 [ 38.465839] do_syscall_64+0x3f/0x90 [ 38.466356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.467058] [ 38.467289] Second to last potentially related work creation: [ 38.468033] kasan_save_stack+0x22/0x50 [ 38.468581] __kasan_record_aux_stack+0x8e/0xa0 [ 38.469217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.469916] remove_vma+0x139/0x170 [ 38.470409] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.471015] do_vmi_munmap+0x1f1/0x2b0 [ 38.471543] mmap_region+0x1f9/0x2660 [ 38.472067] do_mmap+0x854/0xf00 [ 38.472538] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.473076] ksys_mmap_pgoff+0x3af/0x500 [ 38.473629] do_syscall_64+0x3f/0x90 [ 38.474147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.474855] [ 38.475089] The buggy address belongs to the object at ffff88800ca7e9f8 [ 38.475089] which belongs to the cache vm_area_struct of size 168 [ 38.476686] The buggy address is located 88 bytes inside of [ 38.476686] freed 168-byte region [ffff88800ca7e9f8, ffff88800ca7eaa0) [ 38.478225] [ 38.478461] The buggy address belongs to the physical page: [ 38.479184] page:00000000b87d0fa2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca7e [ 38.480368] memcg:ffff888008e89601 [ 38.480844] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.481548] page_type: 0xffffffff() [ 38.482044] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 38.483050] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008e89601 [ 38.484044] page dumped because: kasan: bad access detected [ 38.484764] [ 38.485015] Memory state around the buggy address: [ 38.485659] ffff88800ca7e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.486596] ffff88800ca7e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.487534] >ffff88800ca7ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.488464] ^ [ 38.489235] ffff88800ca7ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.490171] ffff88800ca7eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.491100] ================================================================== [ 38.492123] Disabling lock debugging due to kernel taint [ 40.189657] BUG: Bad rss-counter state mm:0000000089706539 type:MM_FILEPAGES val:33 [ 40.190554] BUG: Bad rss-counter state mm:0000000089706539 type:MM_ANONPAGES val:22 [ 40.634609] BUG: Bad rss-counter state mm:0000000065e9be52 type:MM_FILEPAGES val:33 [ 40.635530] BUG: Bad rss-counter state mm:0000000065e9be52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28004' (ECDSA) to the list of known hosts. 2023/06/19 13:01:55 fuzzer started 2023/06/19 13:01:55 dialing manager at localhost:44161 2023/06/19 13:01:55 checking machine... 2023/06/19 13:01:55 checking revisions... [ 41.268228] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:01:55 testing simple program... [ 41.311314] cgroup: Unknown subsys name 'net' [ 41.350835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:01:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff86137d01 RDX=ffff88801666f940 RSI=0000000000000000 RDI=ffff88801666f5d8 RBP=ffff88801666f660 RSP=ffff88801666f5c8 R8 =ffffffff86137dd6 R9 =ffff88801666f608 R10=0000000000038001 R11=0000000000020f00 R12=ffff88801666f690 R13=0000000000000000 R14=ffff888015e1d1c0 R15=0000000000000000 RIP=ffffffff810bd057 RFL=00000296 [--S-AP-] 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 00007f31cffff700 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=00007f3459674260 CR3=000000000f23e000 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=2035353a31303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a31303a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888009cb1000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff87f93be0 RBP=0000000000000010 RSP=ffff888016607d00 R8 =0000000000000002 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888009cb1130 R13=ffff888009cb10b0 R14=ffff888009cb1010 R15=0000000000000000 RIP=ffffffff8364839f 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 00007f29b015c900 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=00007ffed25d0000 CR3=000000000e314000 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=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