syzkaller login: [ 33.063788] BUG: Bad rss-counter state mm:000000007ee815d1 type:MM_FILEPAGES val:33 [ 33.064891] BUG: Bad rss-counter state mm:000000007ee815d1 type:MM_ANONPAGES val:22 [ 33.179471] ================================================================== [ 33.180087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.180725] Read of size 8 at addr ffff88800ec18ed8 by task sshd/219 [ 33.181252] [ 33.181404] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.182006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.182656] Call Trace: [ 33.182873] [ 33.183070] dump_stack_lvl+0x91/0xf0 [ 33.183406] print_report+0xcc/0x620 [ 33.183739] ? __virt_addr_valid+0x102/0x340 [ 33.184119] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.184715] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.185180] kasan_report+0xbe/0xf0 [ 33.185520] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.185946] vma_interval_tree_remove+0xc75/0xec0 [ 33.186356] vma_prepare+0xc54/0x11a0 [ 33.186678] __split_vma+0x5af/0x950 [ 33.186999] ? __pfx___split_vma+0x10/0x10 [ 33.187367] ? find_held_lock+0x2c/0x110 [ 33.187729] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.188119] ? lock_is_held_type+0x9f/0x120 [ 33.188494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.188914] ? mtree_range_walk+0x632/0x900 [ 33.189293] ? mas_walk+0x5c7/0x7c0 [ 33.189633] do_vmi_munmap+0x1f1/0x2b0 [ 33.189974] mmap_region+0x1f9/0x2660 [ 33.190304] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.190649] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.191136] ? __pfx_lock_acquire+0x10/0x10 [ 33.191497] ? __pfx_mmap_region+0x10/0x10 [ 33.191861] ? security_mmap_addr+0x7d/0xa0 [ 33.192223] ? get_unmapped_area+0x1f5/0x3f0 [ 33.192594] do_mmap+0x854/0xf00 [ 33.192893] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.193234] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.193619] ksys_mmap_pgoff+0x3af/0x500 [ 33.193965] do_syscall_64+0x3f/0x90 [ 33.194292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.194730] RIP: 0033:0x7f5eb201ed82 [ 33.195044] 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 [ 33.196503] RSP: 002b:00007ffd7c95ff18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.197126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5eb201ed82 [ 33.197719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5eb1458000 [ 33.198299] RBP: 00007f5eb1458000 R08: 0000000000000009 R09: 0000000000001000 [ 33.198867] R10: 0000000000000812 R11: 0000000000000206 R12: 000055efcfebcec0 [ 33.199439] R13: 00007ffd7c95ff30 R14: 00007ffd7c95ff60 R15: 00007ffd7c9602c0 [ 33.200020] [ 33.200216] [ 33.200359] Allocated by task 212: [ 33.200647] kasan_save_stack+0x22/0x50 [ 33.200985] kasan_set_track+0x25/0x30 [ 33.201319] __kasan_slab_alloc+0x59/0x70 [ 33.201682] kmem_cache_alloc+0x16b/0x370 [ 33.202032] vm_area_dup+0x20/0x160 [ 33.202336] __split_vma+0x170/0x950 [ 33.202653] split_vma+0xc6/0x110 [ 33.202949] mprotect_fixup+0x8d2/0xb30 [ 33.203291] do_mprotect_pkey+0x87e/0xd40 [ 33.203648] __x64_sys_mprotect+0x78/0xc0 [ 33.204001] do_syscall_64+0x3f/0x90 [ 33.204321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.204758] [ 33.204902] Freed by task 202: [ 33.205166] kasan_save_stack+0x22/0x50 [ 33.205515] kasan_set_track+0x25/0x30 [ 33.205853] kasan_save_free_info+0x2b/0x50 [ 33.206208] __kasan_slab_free+0x10a/0x190 [ 33.206572] kmem_cache_free+0x10d/0x4d0 [ 33.206924] rcu_core+0x8c8/0x2860 [ 33.207225] __do_softirq+0x1b7/0x7d4 [ 33.207545] [ 33.207693] Last potentially related work creation: [ 33.208085] kasan_save_stack+0x22/0x50 [ 33.208426] __kasan_record_aux_stack+0x8e/0xa0 [ 33.208815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.209247] remove_vma+0x139/0x170 [ 33.209564] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.209949] do_vmi_munmap+0x1f1/0x2b0 [ 33.210283] __vm_munmap+0x138/0x3a0 [ 33.210599] __x64_sys_munmap+0x59/0x80 [ 33.210932] do_syscall_64+0x3f/0x90 [ 33.211253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.211683] [ 33.211832] Second to last potentially related work creation: [ 33.212293] kasan_save_stack+0x22/0x50 [ 33.212632] __kasan_record_aux_stack+0x8e/0xa0 [ 33.213031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.213472] remove_vma+0x139/0x170 [ 33.213784] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.214167] do_vmi_munmap+0x1f1/0x2b0 [ 33.214493] mmap_region+0x1f9/0x2660 [ 33.214818] do_mmap+0x854/0xf00 [ 33.215107] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.215436] ksys_mmap_pgoff+0x3af/0x500 [ 33.215773] do_syscall_64+0x3f/0x90 [ 33.216097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.216530] [ 33.216676] The buggy address belongs to the object at ffff88800ec18e80 [ 33.216676] which belongs to the cache vm_area_struct of size 168 [ 33.217681] The buggy address is located 88 bytes inside of [ 33.217681] freed 168-byte region [ffff88800ec18e80, ffff88800ec18f28) [ 33.218636] [ 33.218788] The buggy address belongs to the physical page: [ 33.219237] page:00000000295c9cb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec18 [ 33.219975] memcg:ffff88800f203901 [ 33.220263] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.220702] page_type: 0xffffffff() [ 33.221011] raw: 0100000000000200 ffff88800879fc80 ffffea00003a8540 dead000000000002 [ 33.221653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f203901 [ 33.222268] page dumped because: kasan: bad access detected [ 33.222718] [ 33.222868] Memory state around the buggy address: [ 33.223257] ffff88800ec18d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.223843] ffff88800ec18e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.224427] >ffff88800ec18e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.225006] ^ [ 33.225510] ffff88800ec18f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.226097] ffff88800ec18f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.226788] ================================================================== [ 33.227448] Disabling lock debugging due to kernel taint [ 35.183624] BUG: Bad rss-counter state mm:00000000da90864f type:MM_FILEPAGES val:33 [ 35.184619] BUG: Bad rss-counter state mm:00000000da90864f type:MM_ANONPAGES val:22 [ 35.722749] BUG: Bad rss-counter state mm:000000003d1edcfa type:MM_FILEPAGES val:33 [ 35.723920] BUG: Bad rss-counter state mm:000000003d1edcfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18811' (ECDSA) to the list of known hosts. 2023/06/20 01:15:30 fuzzer started 2023/06/20 01:15:30 dialing manager at localhost:44161 2023/06/20 01:15:30 checking machine... 2023/06/20 01:15:30 checking revisions... [ 36.403829] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:15:30 testing simple program... [ 36.470434] cgroup: Unknown subsys name 'net' [ 36.516976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:15:28 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=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 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=00007f6d28fe1670 CR3=0000000015bd2000 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=2030333a35313a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a35313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880164e3680 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffff8880164e3a74 RBP=ffff8880183a7d90 RSP=ffff8880183a7d18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=0000000000000000 R11=0000000000000001 R12=ffff888008f76a00 R13=ffff88801687c680 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff8135bd1b RFL=00000217 [----APC] 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 00007f1135d8a900 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=00007f1136341618 CR3=000000000e5e2000 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