syzkaller login: [ 33.116092] BUG: Bad rss-counter state mm:000000004d181298 type:MM_FILEPAGES val:33 [ 33.117482] BUG: Bad rss-counter state mm:000000004d181298 type:MM_ANONPAGES val:22 [ 33.285414] ================================================================== [ 33.286419] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.287433] Read of size 8 at addr ffff8880164073f8 by task sshd/220 [ 33.288293] [ 33.288512] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.289369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.290357] Call Trace: [ 33.290676] [ 33.290957] dump_stack_lvl+0x91/0xf0 [ 33.291443] print_report+0xcc/0x620 [ 33.291925] ? __virt_addr_valid+0x102/0x340 [ 33.292473] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.293092] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.293724] kasan_report+0xbe/0xf0 [ 33.294195] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.294804] vma_interval_tree_remove+0xc75/0xec0 [ 33.295404] vma_prepare+0xc54/0x11a0 [ 33.295876] __split_vma+0x5af/0x950 [ 33.296345] ? __pfx___split_vma+0x10/0x10 [ 33.296863] ? find_held_lock+0x2c/0x110 [ 33.297386] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.297951] ? lock_is_held_type+0x9f/0x120 [ 33.298482] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.299085] ? mtree_range_walk+0x632/0x900 [ 33.299631] ? mas_walk+0x5c7/0x7c0 [ 33.300102] do_vmi_munmap+0x1f1/0x2b0 [ 33.300585] mmap_region+0x1f9/0x2660 [ 33.301061] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.301573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.302285] ? __pfx_lock_acquire+0x10/0x10 [ 33.302810] ? __pfx_mmap_region+0x10/0x10 [ 33.303347] ? security_mmap_addr+0x7d/0xa0 [ 33.303877] ? get_unmapped_area+0x1f5/0x3f0 [ 33.304425] do_mmap+0x854/0xf00 [ 33.304860] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.305356] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.305946] ksys_mmap_pgoff+0x3af/0x500 [ 33.306445] do_syscall_64+0x3f/0x90 [ 33.306913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.307550] RIP: 0033:0x7f1fe7723d82 [ 33.308003] 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 [ 33.310113] RSP: 002b:00007ffd33c38cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.311007] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fe7723d82 [ 33.311844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1fe6b5d000 [ 33.312677] RBP: 00007f1fe6b5d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.313533] R10: 0000000000000812 R11: 0000000000000206 R12: 000056127c563980 [ 33.314367] R13: 00007ffd33c38cf0 R14: 00007ffd33c38d20 R15: 00007ffd33c39080 [ 33.315214] [ 33.315507] [ 33.315719] Allocated by task 213: [ 33.316140] kasan_save_stack+0x22/0x50 [ 33.316640] kasan_set_track+0x25/0x30 [ 33.317127] __kasan_slab_alloc+0x59/0x70 [ 33.317661] kmem_cache_alloc+0x16b/0x370 [ 33.318184] vm_area_dup+0x20/0x160 [ 33.318639] __split_vma+0x170/0x950 [ 33.319104] split_vma+0xc6/0x110 [ 33.319544] mprotect_fixup+0x8d2/0xb30 [ 33.320042] do_mprotect_pkey+0x87e/0xd40 [ 33.320555] __x64_sys_mprotect+0x78/0xc0 [ 33.321069] do_syscall_64+0x3f/0x90 [ 33.321541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.322175] [ 33.322387] Freed by task 203: [ 33.322779] kasan_save_stack+0x22/0x50 [ 33.323283] kasan_set_track+0x25/0x30 [ 33.323774] kasan_save_free_info+0x2b/0x50 [ 33.324305] __kasan_slab_free+0x10a/0x190 [ 33.324837] kmem_cache_free+0x10d/0x4d0 [ 33.325338] rcu_core+0x8c8/0x2860 [ 33.325792] __do_softirq+0x1b7/0x7d4 [ 33.326270] [ 33.326482] Last potentially related work creation: [ 33.327060] kasan_save_stack+0x22/0x50 [ 33.327559] __kasan_record_aux_stack+0x8e/0xa0 [ 33.328129] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.328765] remove_vma+0x139/0x170 [ 33.329210] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.329776] do_vmi_munmap+0x1f1/0x2b0 [ 33.330256] __vm_munmap+0x138/0x3a0 [ 33.330722] __x64_sys_munmap+0x59/0x80 [ 33.331214] do_syscall_64+0x3f/0x90 [ 33.331681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.332309] [ 33.332521] The buggy address belongs to the object at ffff8880164073a0 [ 33.332521] which belongs to the cache vm_area_struct of size 168 [ 33.333996] The buggy address is located 88 bytes inside of [ 33.333996] freed 168-byte region [ffff8880164073a0, ffff888016407448) [ 33.335378] [ 33.335591] The buggy address belongs to the physical page: [ 33.336241] page:0000000027c45065 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16407 [ 33.337325] memcg:ffff888017fe5701 [ 33.337762] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.338401] page_type: 0xffffffff() [ 33.338849] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.339758] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017fe5701 [ 33.340653] page dumped because: kasan: bad access detected [ 33.341300] [ 33.341523] Memory state around the buggy address: [ 33.342102] ffff888016407280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.342956] ffff888016407300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.343802] >ffff888016407380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.344657] ^ [ 33.345517] ffff888016407400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.346370] ffff888016407480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.347207] ================================================================== [ 33.348207] Disabling lock debugging due to kernel taint [ 35.556168] BUG: Bad rss-counter state mm:00000000e9e076cf type:MM_FILEPAGES val:33 [ 35.557238] BUG: Bad rss-counter state mm:00000000e9e076cf type:MM_ANONPAGES val:22 [ 35.974027] BUG: Bad rss-counter state mm:00000000c523160d type:MM_FILEPAGES val:33 [ 35.975083] BUG: Bad rss-counter state mm:00000000c523160d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29641' (ECDSA) to the list of known hosts. 2023/06/20 00:14:22 fuzzer started 2023/06/20 00:14:23 dialing manager at localhost:44161 2023/06/20 00:14:23 checking machine... 2023/06/20 00:14:23 checking revisions... [ 36.748571] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:14:23 testing simple program... [ 36.799572] cgroup: Unknown subsys name 'net' [ 36.837483] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:14:20 Registers: info registers vcpu 0 RAX=ffffffff84d65320 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffffff0ba7c60 RSI=ffffffff8363c1c2 RDI=ffff888014324ac4 RBP=0000000000000010 RSP=ffff888018eefe20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000003 R13=0000000000000009 R14=ffff888014324ac0 R15=0000000000000010 RIP=ffffffff8363c227 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 00007f7b26bbb900 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=00007f7b271730b0 CR3=000000000cade000 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=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=00007f69d97192a0 CR3=0000000012f98000 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=2c9606463ce78885dd454699c0738b1e XMM02=000000000011cac8eff9b2d0a8fce9cb XMM03=000000000011cb982c67c8bc2e329bc3 XMM04=eb4967d54fa07a7000000000000ae988 XMM05=19e9129bd510f2350000000000133c60 XMM06=30e25317675e0bea0000000000132ac8 XMM07=e042d86d42eb936e0000000000124330 XMM08=bb611f82b68fdf4a000000000011cb98 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000