syzkaller login: [ 48.883559] BUG: Bad rss-counter state mm:000000001f505240 type:MM_FILEPAGES val:33 [ 48.885040] BUG: Bad rss-counter state mm:000000001f505240 type:MM_ANONPAGES val:22 [ 49.051330] ================================================================== [ 49.052265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.053227] Read of size 8 at addr ffff88800e423d08 by task sshd/219 [ 49.054096] [ 49.054322] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.055216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.056212] Call Trace: [ 49.056531] [ 49.056827] dump_stack_lvl+0x91/0xf0 [ 49.057317] print_report+0xcc/0x620 [ 49.057805] ? __virt_addr_valid+0x102/0x340 [ 49.058357] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.059003] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.059629] kasan_report+0xbe/0xf0 [ 49.060108] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.060734] vma_interval_tree_remove+0xc75/0xec0 [ 49.061335] vma_prepare+0xc54/0x11a0 [ 49.061813] __split_vma+0x5af/0x950 [ 49.062287] ? __pfx___split_vma+0x10/0x10 [ 49.062848] ? find_held_lock+0x2c/0x110 [ 49.063376] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.063939] ? lock_is_held_type+0x9f/0x120 [ 49.064475] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.065077] ? mtree_range_walk+0x632/0x900 [ 49.065628] ? mas_walk+0x5c7/0x7c0 [ 49.066105] do_vmi_munmap+0x1f1/0x2b0 [ 49.066610] mmap_region+0x1f9/0x2660 [ 49.067100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.067608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.068328] ? __pfx_lock_acquire+0x10/0x10 [ 49.068874] ? __pfx_mmap_region+0x10/0x10 [ 49.069420] ? security_mmap_addr+0x7d/0xa0 [ 49.069962] ? get_unmapped_area+0x1f5/0x3f0 [ 49.070532] do_mmap+0x854/0xf00 [ 49.070985] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.071489] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.072073] ksys_mmap_pgoff+0x3af/0x500 [ 49.072582] do_syscall_64+0x3f/0x90 [ 49.073081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.073734] RIP: 0033:0x7f7c50aa4d82 [ 49.074194] 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 [ 49.076387] RSP: 002b:00007ffcebcd0f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.077310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c50aa4d82 [ 49.078213] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c4fede000 [ 49.079134] RBP: 00007f7c4fede000 R08: 0000000000000009 R09: 0000000000001000 [ 49.080028] R10: 0000000000000812 R11: 0000000000000206 R12: 000056405d717ec0 [ 49.080919] R13: 00007ffcebcd0f50 R14: 00007ffcebcd0f80 R15: 00007ffcebcd12e0 [ 49.081839] [ 49.082149] [ 49.082374] Allocated by task 212: [ 49.082849] kasan_save_stack+0x22/0x50 [ 49.083392] kasan_set_track+0x25/0x30 [ 49.083913] __kasan_slab_alloc+0x59/0x70 [ 49.084468] kmem_cache_alloc+0x16b/0x370 [ 49.085012] vm_area_dup+0x20/0x160 [ 49.085491] __split_vma+0x170/0x950 [ 49.085988] split_vma+0xc6/0x110 [ 49.086444] mprotect_fixup+0x8d2/0xb30 [ 49.086978] do_mprotect_pkey+0x87e/0xd40 [ 49.087526] __x64_sys_mprotect+0x78/0xc0 [ 49.088074] do_syscall_64+0x3f/0x90 [ 49.088577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.089250] [ 49.089480] Freed by task 203: [ 49.089894] kasan_save_stack+0x22/0x50 [ 49.090436] kasan_set_track+0x25/0x30 [ 49.090970] kasan_save_free_info+0x2b/0x50 [ 49.091536] __kasan_slab_free+0x10a/0x190 [ 49.092096] kmem_cache_free+0x10d/0x4d0 [ 49.092626] rcu_core+0x8c8/0x2860 [ 49.093099] __do_softirq+0x1b7/0x7d4 [ 49.093602] [ 49.093833] Last potentially related work creation: [ 49.094458] kasan_save_stack+0x22/0x50 [ 49.095010] __kasan_record_aux_stack+0x8e/0xa0 [ 49.095603] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.096288] remove_vma+0x139/0x170 [ 49.096775] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.097371] do_vmi_munmap+0x1f1/0x2b0 [ 49.097882] __vm_munmap+0x138/0x3a0 [ 49.098377] __x64_sys_munmap+0x59/0x80 [ 49.098919] do_syscall_64+0x3f/0x90 [ 49.099418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.100101] [ 49.100324] Second to last potentially related work creation: [ 49.101049] kasan_save_stack+0x22/0x50 [ 49.101594] __kasan_record_aux_stack+0x8e/0xa0 [ 49.102205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.102912] remove_vma+0x139/0x170 [ 49.103391] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.103990] do_vmi_munmap+0x1f1/0x2b0 [ 49.104508] mmap_region+0x1f9/0x2660 [ 49.105025] do_mmap+0x854/0xf00 [ 49.105486] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.105999] ksys_mmap_pgoff+0x3af/0x500 [ 49.106536] do_syscall_64+0x3f/0x90 [ 49.107053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.107740] [ 49.107966] The buggy address belongs to the object at ffff88800e423cb0 [ 49.107966] which belongs to the cache vm_area_struct of size 168 [ 49.109526] The buggy address is located 88 bytes inside of [ 49.109526] freed 168-byte region [ffff88800e423cb0, ffff88800e423d58) [ 49.111033] [ 49.111259] The buggy address belongs to the physical page: [ 49.111963] page:00000000681085a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe423 [ 49.113107] memcg:ffff888019f4e301 [ 49.113568] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 49.114304] page_type: 0xffffffff() [ 49.114793] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 49.115773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f4e301 [ 49.116738] page dumped because: kasan: bad access detected [ 49.117434] [ 49.117660] Memory state around the buggy address: [ 49.118274] ffff88800e423c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 49.119192] ffff88800e423c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 49.120105] >ffff88800e423d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 49.121010] ^ [ 49.121479] ffff88800e423d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 49.122389] ffff88800e423e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 49.123309] ================================================================== [ 49.124403] Disabling lock debugging due to kernel taint [ 51.224653] BUG: Bad rss-counter state mm:000000004ea88545 type:MM_FILEPAGES val:33 [ 51.225591] BUG: Bad rss-counter state mm:000000004ea88545 type:MM_ANONPAGES val:22 [ 51.699913] BUG: Bad rss-counter state mm:00000000ba97adbf type:MM_FILEPAGES val:33 [ 51.701138] BUG: Bad rss-counter state mm:00000000ba97adbf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38525' (ECDSA) to the list of known hosts. 2023/06/20 00:37:44 fuzzer started 2023/06/20 00:37:44 dialing manager at localhost:44161 2023/06/20 00:37:44 checking machine... 2023/06/20 00:37:44 checking revisions... [ 52.416630] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:37:44 testing simple program... [ 52.468980] cgroup: Unknown subsys name 'net' [ 52.510648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:37:34 Registers: info registers vcpu 0 RAX=fffffffffb5f144a RBX=ffffffff85dbc1e4 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1cc RSP=ffff888017cff9e8 R8 =ffffffff860d68c0 R9 =ffff888017cffae0 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1cc R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f73966e5900 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=00007ffcda150000 CR3=000000000eb3a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f0851d98400 CR3=000000000d872000 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=a296e8e6a8f68f86be4868e2cc8c9400 XMM02=000000000011d7b0ec2efd57dc4c00df XMM03=0000000000124150e1143348311fc146 XMM04=a117b8a9bccddfad00000000000ae988 XMM05=dfcdbad4f1609c370000000000134d60 XMM06=a92645ac8ab0c2750000000000133f38 XMM07=e042d86d42eb936e00000000001243d0 XMM08=e1143348311fc146000000000011d810 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000