syzkaller login: [ 30.661435] BUG: Bad rss-counter state mm:00000000f90022ca type:MM_FILEPAGES val:33 [ 30.662895] BUG: Bad rss-counter state mm:00000000f90022ca type:MM_ANONPAGES val:22 [ 30.845495] ================================================================== [ 30.846460] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.847434] Read of size 8 at addr ffff88801a086228 by task sshd/220 [ 30.848240] [ 30.848487] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.849518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.850576] Call Trace: [ 30.850928] [ 30.851226] dump_stack_lvl+0x91/0xf0 [ 30.851756] print_report+0xcc/0x620 [ 30.852269] ? __virt_addr_valid+0x102/0x340 [ 30.852876] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853538] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854178] kasan_report+0xbe/0xf0 [ 30.854679] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855352] vma_interval_tree_remove+0xc75/0xec0 [ 30.855991] vma_prepare+0xc54/0x11a0 [ 30.856491] __split_vma+0x5af/0x950 [ 30.856987] ? __pfx___split_vma+0x10/0x10 [ 30.857557] ? find_held_lock+0x2c/0x110 [ 30.858090] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.858705] ? lock_is_held_type+0x9f/0x120 [ 30.859284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.859939] ? mtree_range_walk+0x632/0x900 [ 30.860538] ? mas_walk+0x5c7/0x7c0 [ 30.861053] do_vmi_munmap+0x1f1/0x2b0 [ 30.861598] mmap_region+0x1f9/0x2660 [ 30.862108] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.862675] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.863472] ? __pfx_lock_acquire+0x10/0x10 [ 30.864036] ? __pfx_mmap_region+0x10/0x10 [ 30.864620] ? security_mmap_addr+0x7d/0xa0 [ 30.865225] ? get_unmapped_area+0x1f5/0x3f0 [ 30.865826] do_mmap+0x854/0xf00 [ 30.866312] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.866847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.867449] ksys_mmap_pgoff+0x3af/0x500 [ 30.867990] do_syscall_64+0x3f/0x90 [ 30.868501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869211] RIP: 0033:0x7fdb5457ed82 [ 30.869727] 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 [ 30.871994] RSP: 002b:00007ffdccb35bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.872974] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb5457ed82 [ 30.873857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb539b8000 [ 30.874734] RBP: 00007fdb539b8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.875654] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a00723ec0 [ 30.876561] R13: 00007ffdccb35bd0 R14: 00007ffdccb35c00 R15: 00007ffdccb35f60 [ 30.877504] [ 30.877806] [ 30.878032] Allocated by task 213: [ 30.878503] kasan_save_stack+0x22/0x50 [ 30.879039] kasan_set_track+0x25/0x30 [ 30.879573] __kasan_slab_alloc+0x59/0x70 [ 30.880109] kmem_cache_alloc+0x16b/0x370 [ 30.880667] vm_area_dup+0x20/0x160 [ 30.881164] __split_vma+0x170/0x950 [ 30.881658] split_vma+0xc6/0x110 [ 30.882113] mprotect_fixup+0x8d2/0xb30 [ 30.882648] do_mprotect_pkey+0x87e/0xd40 [ 30.883193] __x64_sys_mprotect+0x78/0xc0 [ 30.883743] do_syscall_64+0x3f/0x90 [ 30.884240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884926] [ 30.885143] Freed by task 213: [ 30.885576] kasan_save_stack+0x22/0x50 [ 30.886081] kasan_set_track+0x25/0x30 [ 30.886602] kasan_save_free_info+0x2b/0x50 [ 30.887145] __kasan_slab_free+0x10a/0x190 [ 30.887704] kmem_cache_free+0x10d/0x4d0 [ 30.888219] rcu_core+0x8c8/0x2860 [ 30.888675] __do_softirq+0x1b7/0x7d4 [ 30.889195] [ 30.889435] Last potentially related work creation: [ 30.890078] kasan_save_stack+0x22/0x50 [ 30.890590] __kasan_record_aux_stack+0x8e/0xa0 [ 30.891172] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.891843] remove_vma+0x139/0x170 [ 30.892316] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.892909] do_vmi_munmap+0x1f1/0x2b0 [ 30.893435] __vm_munmap+0x138/0x3a0 [ 30.893909] __x64_sys_munmap+0x59/0x80 [ 30.894431] do_syscall_64+0x3f/0x90 [ 30.894913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895582] [ 30.895801] The buggy address belongs to the object at ffff88801a0861d0 [ 30.895801] which belongs to the cache vm_area_struct of size 168 [ 30.897370] The buggy address is located 88 bytes inside of [ 30.897370] freed 168-byte region [ffff88801a0861d0, ffff88801a086278) [ 30.899074] [ 30.899312] The buggy address belongs to the physical page: [ 30.899971] page:00000000ed1720c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a086 [ 30.901112] memcg:ffff88800ff53c01 [ 30.901577] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.902259] page_type: 0xffffffff() [ 30.902720] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.903678] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff53c01 [ 30.904614] page dumped because: kasan: bad access detected [ 30.905325] [ 30.905554] Memory state around the buggy address: [ 30.906151] ffff88801a086100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.907041] ffff88801a086180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.907940] >ffff88801a086200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.908848] ^ [ 30.909453] ffff88801a086280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.910392] ffff88801a086300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.911330] ================================================================== [ 30.912363] Disabling lock debugging due to kernel taint [ 32.867405] BUG: Bad rss-counter state mm:00000000c04bcd22 type:MM_FILEPAGES val:33 [ 32.868393] BUG: Bad rss-counter state mm:00000000c04bcd22 type:MM_ANONPAGES val:22 [ 33.420244] BUG: Bad rss-counter state mm:0000000091445362 type:MM_FILEPAGES val:33 [ 33.421409] BUG: Bad rss-counter state mm:0000000091445362 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17462' (ECDSA) to the list of known hosts. 2023/06/21 00:42:14 fuzzer started 2023/06/21 00:42:15 dialing manager at localhost:36067 2023/06/21 00:42:15 checking machine... 2023/06/21 00:42:15 checking revisions... [ 34.026687] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:42:15 testing simple program... [ 34.072380] cgroup: Unknown subsys name 'net' [ 34.111580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018dbff01 RSI=ffff888018dbff48 RDI=ffff888018dbff48 RBP=ffff888018dbf248 RSP=ffff888018dbf180 R8 =0000000000000001 R9 =ffff888018dbf230 R10=0000000000038001 R11=00000000000b5080 R12=ffff888018dbf250 R13=ffff888018dbf238 R14=ffff888018dbff48 R15=ffff888018dbf1f0 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fe9ff113900 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=00007fe9ff6ca618 CR3=00000000147e4000 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=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=00007f291b1f8cd0 CR3=000000000c56c000 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=28a7704ffc1f20b1ce48da027da1c655 XMM02=000000000011a880eff9b2d0a8fce9cb XMM03=000000000011a9502c67c8bc2e329bc3 XMM04=dd9ec0c115f6c71400000000000ae988 XMM05=19e9129bd510f2350000000000131bc0 XMM06=0c01a1cc0d38d99f0000000000130a28 XMM07=e042d86d42eb936e0000000000121fd8 XMM08=3d0ade900963c43d000000000011a950 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000