syzkaller login: [ 31.824364] BUG: Bad rss-counter state mm:00000000cabc930d type:MM_FILEPAGES val:33 [ 31.825537] BUG: Bad rss-counter state mm:00000000cabc930d type:MM_ANONPAGES val:22 [ 31.866036] ================================================================== [ 31.866921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.867843] Read of size 8 at addr ffff888016f35968 by task sshd/221 [ 31.868610] [ 31.868826] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.869676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.870625] Call Trace: [ 31.870953] [ 31.871236] dump_stack_lvl+0x91/0xf0 [ 31.871715] print_report+0xcc/0x620 [ 31.872200] ? __virt_addr_valid+0x102/0x340 [ 31.872776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873385] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.873998] kasan_report+0xbe/0xf0 [ 31.874461] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875066] vma_interval_tree_remove+0xc75/0xec0 [ 31.875665] vma_prepare+0xc54/0x11a0 [ 31.876131] __split_vma+0x5af/0x950 [ 31.876597] ? __pfx___split_vma+0x10/0x10 [ 31.877123] ? find_held_lock+0x2c/0x110 [ 31.877638] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.878189] ? lock_is_held_type+0x9f/0x120 [ 31.878722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.879322] ? mtree_range_walk+0x632/0x900 [ 31.879917] ? mas_walk+0x5c7/0x7c0 [ 31.880444] do_vmi_munmap+0x1f1/0x2b0 [ 31.880939] mmap_region+0x1f9/0x2660 [ 31.881412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.881909] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.882613] ? __pfx_lock_acquire+0x10/0x10 [ 31.883132] ? __pfx_mmap_region+0x10/0x10 [ 31.883650] ? security_mmap_addr+0x7d/0xa0 [ 31.884166] ? get_unmapped_area+0x1f5/0x3f0 [ 31.884705] do_mmap+0x854/0xf00 [ 31.885133] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.885623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.886178] ksys_mmap_pgoff+0x3af/0x500 [ 31.886675] do_syscall_64+0x3f/0x90 [ 31.887145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.887782] RIP: 0033:0x7fc033689d82 [ 31.888228] 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 [ 31.890336] RSP: 002b:00007ffc78f243e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.891218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc033689d82 [ 31.892048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc032ac3000 [ 31.892906] RBP: 00007fc032ac3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.893750] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f3de1e7f70 [ 31.894567] R13: 00007ffc78f24400 R14: 00007ffc78f24430 R15: 00007ffc78f24790 [ 31.895419] [ 31.895708] [ 31.895917] Allocated by task 214: [ 31.896339] kasan_save_stack+0x22/0x50 [ 31.896829] kasan_set_track+0x25/0x30 [ 31.897311] __kasan_slab_alloc+0x59/0x70 [ 31.897825] kmem_cache_alloc+0x16b/0x370 [ 31.898335] vm_area_dup+0x20/0x160 [ 31.898788] __split_vma+0x170/0x950 [ 31.899248] split_vma+0xc6/0x110 [ 31.899684] mprotect_fixup+0x8d2/0xb30 [ 31.900174] do_mprotect_pkey+0x87e/0xd40 [ 31.900699] __x64_sys_mprotect+0x78/0xc0 [ 31.901219] do_syscall_64+0x3f/0x90 [ 31.901682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902314] [ 31.902529] Freed by task 214: [ 31.902912] kasan_save_stack+0x22/0x50 [ 31.903409] kasan_set_track+0x25/0x30 [ 31.903898] kasan_save_free_info+0x2b/0x50 [ 31.904434] __kasan_slab_free+0x10a/0x190 [ 31.904973] kmem_cache_free+0x10d/0x4d0 [ 31.905478] rcu_core+0x8c8/0x2860 [ 31.905917] __do_softirq+0x1b7/0x7d4 [ 31.906384] [ 31.906596] Last potentially related work creation: [ 31.907175] kasan_save_stack+0x22/0x50 [ 31.907669] __kasan_record_aux_stack+0x8e/0xa0 [ 31.908226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.908870] remove_vma+0x139/0x170 [ 31.909317] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.909861] do_vmi_munmap+0x1f1/0x2b0 [ 31.910338] __vm_munmap+0x138/0x3a0 [ 31.910800] __x64_sys_munmap+0x59/0x80 [ 31.911285] do_syscall_64+0x3f/0x90 [ 31.911744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.912377] [ 31.912592] The buggy address belongs to the object at ffff888016f35910 [ 31.912592] which belongs to the cache vm_area_struct of size 168 [ 31.914021] The buggy address is located 88 bytes inside of [ 31.914021] freed 168-byte region [ffff888016f35910, ffff888016f359b8) [ 31.915530] [ 31.915745] The buggy address belongs to the physical page: [ 31.916418] page:00000000474fcdc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f35 [ 31.917514] memcg:ffff88800daac501 [ 31.917940] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.918597] page_type: 0xffffffff() [ 31.919049] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.919972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daac501 [ 31.920892] page dumped because: kasan: bad access detected [ 31.921564] [ 31.921781] Memory state around the buggy address: [ 31.922353] ffff888016f35800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.923218] ffff888016f35880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.924083] >ffff888016f35900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.924959] ^ [ 31.925742] ffff888016f35980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.926595] ffff888016f35a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.927447] ================================================================== [ 31.928778] Disabling lock debugging due to kernel taint [ 33.913256] BUG: Bad rss-counter state mm:00000000df67d6b7 type:MM_FILEPAGES val:33 [ 33.914724] BUG: Bad rss-counter state mm:00000000df67d6b7 type:MM_ANONPAGES val:22 [ 34.390231] BUG: Bad rss-counter state mm:000000000f6e0f3e type:MM_FILEPAGES val:33 [ 34.391381] BUG: Bad rss-counter state mm:000000000f6e0f3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19756' (ECDSA) to the list of known hosts. 2023/06/19 17:08:27 fuzzer started 2023/06/19 17:08:28 dialing manager at localhost:44161 2023/06/19 17:08:28 checking machine... 2023/06/19 17:08:28 checking revisions... [ 35.110581] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:08:28 testing simple program... [ 35.159479] cgroup: Unknown subsys name 'net' [ 35.207456] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 0000000000000000 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=00007ff3dc80a000 CR3=000000000cfe0000 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=8090133b33b8f8a9404f02d5a3720297 XMM02=000000000011f980eff9b2d0a8fce9cb XMM03=000000000011fa502c67c8bc2e329bc3 XMM04=324fbdaee84a287900000000000ae988 XMM05=2b3ae380c4028d120000000000134d60 XMM06=c291bd5c70af25b90000000000133b50 XMM07=fb795ef6d657705600000000001240b8 XMM08=2c67c8bc2e329bc3000000000011f9f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000e RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000d40 RSI=000000000000000e RDI=ffff88800e9d7ab0 RBP=ffff8880087b0500 RSP=ffff88800e9d7aa8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000d40 R13=0000000000000d40 R14=0000000000000001 R15=0000000000000d40 RIP=ffffffff82270df4 RFL=00000287 [--S--PC] 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 00007f3b2f61c900 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=00007f3b2fbd3618 CR3=000000000d104000 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=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