syzkaller login: [ 31.209385] BUG: Bad rss-counter state mm:00000000816746fb type:MM_FILEPAGES val:33 [ 31.211156] BUG: Bad rss-counter state mm:00000000816746fb type:MM_ANONPAGES val:22 [ 31.371406] ================================================================== [ 31.372258] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.373138] Read of size 8 at addr ffff888019c3cb38 by task sshd/219 [ 31.373983] [ 31.374251] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.375299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.376524] Call Trace: [ 31.376925] [ 31.377268] dump_stack_lvl+0x91/0xf0 [ 31.377865] print_report+0xcc/0x620 [ 31.378462] ? __virt_addr_valid+0x102/0x340 [ 31.379135] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379875] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.380634] kasan_report+0xbe/0xf0 [ 31.381330] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.382103] vma_interval_tree_remove+0xc75/0xec0 [ 31.382833] vma_prepare+0xc54/0x11a0 [ 31.383412] __split_vma+0x5af/0x950 [ 31.383979] ? __pfx___split_vma+0x10/0x10 [ 31.384629] ? find_held_lock+0x2c/0x110 [ 31.385249] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.385924] ? lock_is_held_type+0x9f/0x120 [ 31.386579] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.387308] ? mtree_range_walk+0x632/0x900 [ 31.387978] ? mas_walk+0x5c7/0x7c0 [ 31.388548] do_vmi_munmap+0x1f1/0x2b0 [ 31.389142] mmap_region+0x1f9/0x2660 [ 31.389723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.390361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.391213] ? __pfx_lock_acquire+0x10/0x10 [ 31.391866] ? __pfx_mmap_region+0x10/0x10 [ 31.392494] ? security_mmap_addr+0x7d/0xa0 [ 31.393130] ? get_unmapped_area+0x1f5/0x3f0 [ 31.393796] do_mmap+0x854/0xf00 [ 31.394327] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.394921] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.395590] ksys_mmap_pgoff+0x3af/0x500 [ 31.396195] do_syscall_64+0x3f/0x90 [ 31.396780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397551] RIP: 0033:0x7fddeb129d82 [ 31.398106] 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 [ 31.400679] RSP: 002b:00007ffc1af17848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.401786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddeb129d82 [ 31.402839] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddea563000 [ 31.403867] RBP: 00007fddea563000 R08: 0000000000000009 R09: 0000000000001000 [ 31.404891] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a50ced980 [ 31.405917] R13: 00007ffc1af17860 R14: 00007ffc1af17890 R15: 00007ffc1af17bf0 [ 31.406973] [ 31.407330] [ 31.407594] Allocated by task 212: [ 31.408117] kasan_save_stack+0x22/0x50 [ 31.408735] kasan_set_track+0x25/0x30 [ 31.409330] __kasan_slab_alloc+0x59/0x70 [ 31.409958] kmem_cache_alloc+0x16b/0x370 [ 31.410696] vm_area_dup+0x20/0x160 [ 31.411278] __split_vma+0x170/0x950 [ 31.411876] split_vma+0xc6/0x110 [ 31.412431] mprotect_fixup+0x8d2/0xb30 [ 31.413075] do_mprotect_pkey+0x87e/0xd40 [ 31.413749] __x64_sys_mprotect+0x78/0xc0 [ 31.414421] do_syscall_64+0x3f/0x90 [ 31.415032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415851] [ 31.416121] Freed by task 212: [ 31.416627] kasan_save_stack+0x22/0x50 [ 31.417250] kasan_set_track+0x25/0x30 [ 31.417887] kasan_save_free_info+0x2b/0x50 [ 31.418606] __kasan_slab_free+0x10a/0x190 [ 31.419190] kmem_cache_free+0x10d/0x4d0 [ 31.419711] rcu_core+0x8c8/0x2860 [ 31.420155] __do_softirq+0x1b7/0x7d4 [ 31.420637] [ 31.420851] Last potentially related work creation: [ 31.421425] kasan_save_stack+0x22/0x50 [ 31.421952] __kasan_record_aux_stack+0x8e/0xa0 [ 31.422537] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.423182] remove_vma+0x139/0x170 [ 31.423634] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.424188] do_vmi_munmap+0x1f1/0x2b0 [ 31.424680] __vm_munmap+0x138/0x3a0 [ 31.425141] __x64_sys_munmap+0x59/0x80 [ 31.425655] do_syscall_64+0x3f/0x90 [ 31.426139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.426788] [ 31.426996] The buggy address belongs to the object at ffff888019c3cae0 [ 31.426996] which belongs to the cache vm_area_struct of size 168 [ 31.428475] The buggy address is located 88 bytes inside of [ 31.428475] freed 168-byte region [ffff888019c3cae0, ffff888019c3cb88) [ 31.429903] [ 31.430141] The buggy address belongs to the physical page: [ 31.430804] page:00000000e607274b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c3c [ 31.431894] memcg:ffff88800caf7301 [ 31.432302] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.432956] page_type: 0xffffffff() [ 31.433398] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.434359] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caf7301 [ 31.435260] page dumped because: kasan: bad access detected [ 31.435919] [ 31.436126] Memory state around the buggy address: [ 31.436712] ffff888019c3ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.437559] ffff888019c3ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.438413] >ffff888019c3cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.439276] ^ [ 31.439887] ffff888019c3cb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.440734] ffff888019c3cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.441613] ================================================================== [ 31.442609] Disabling lock debugging due to kernel taint [ 33.651263] BUG: Bad rss-counter state mm:0000000037412b91 type:MM_FILEPAGES val:33 [ 33.652253] BUG: Bad rss-counter state mm:0000000037412b91 type:MM_ANONPAGES val:22 [ 34.189246] BUG: Bad rss-counter state mm:000000007adc9597 type:MM_FILEPAGES val:33 [ 34.190430] BUG: Bad rss-counter state mm:000000007adc9597 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6464' (ECDSA) to the list of known hosts. 2023/06/20 12:15:24 fuzzer started 2023/06/20 12:15:25 dialing manager at localhost:36067 2023/06/20 12:15:25 checking machine... 2023/06/20 12:15:25 checking revisions... [ 34.836369] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:15:25 testing simple program... [ 34.891398] cgroup: Unknown subsys name 'net' [ 34.931608] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:15:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ebfa4c0 RCX=ffff88800844f780 RDX=ffffea00003afe80 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88801469fc78 R8 =ffff88800ebfad10 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88801469fcb8 R14=ffff88800844f780 R15=ffff88800ebfa260 RIP=ffffffff81810316 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 00007f6937177900 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=00007f69365f9230 CR3=000000000c804000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=eb5bdab92ae65e3000000000000ae988 XMM05=ba57159b4e1d22490000000000132f10 XMM06=806171799158d9670000000000131c40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff1100d9e1329 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806cf09938 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-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 00007fc6e3c07900 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=00007fc6e41be618 CR3=000000001a116000 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