syzkaller login: [ 30.749318] BUG: Bad rss-counter state mm:000000008285356c type:MM_FILEPAGES val:33 [ 30.750512] BUG: Bad rss-counter state mm:000000008285356c type:MM_ANONPAGES val:22 [ 30.795353] ================================================================== [ 30.796363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.797328] Read of size 8 at addr ffff88800b8afdf0 by task sshd/220 [ 30.798090] [ 30.798304] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.799161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.800151] Call Trace: [ 30.800475] [ 30.800764] dump_stack_lvl+0x91/0xf0 [ 30.801276] print_report+0xcc/0x620 [ 30.801781] ? __virt_addr_valid+0x102/0x340 [ 30.802353] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.802989] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.803637] kasan_report+0xbe/0xf0 [ 30.804128] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.804773] vma_interval_tree_remove+0xc75/0xec0 [ 30.805401] vma_prepare+0xc54/0x11a0 [ 30.805899] __split_vma+0x5af/0x950 [ 30.806374] ? __pfx___split_vma+0x10/0x10 [ 30.806913] ? find_held_lock+0x2c/0x110 [ 30.807455] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.808068] ? lock_is_held_type+0x9f/0x120 [ 30.808627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.809249] ? mtree_range_walk+0x632/0x900 [ 30.809833] ? mas_walk+0x5c7/0x7c0 [ 30.810335] do_vmi_munmap+0x1f1/0x2b0 [ 30.810846] mmap_region+0x1f9/0x2660 [ 30.811346] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.811897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.812641] ? __pfx_lock_acquire+0x10/0x10 [ 30.813187] ? __pfx_mmap_region+0x10/0x10 [ 30.813735] ? security_mmap_addr+0x7d/0xa0 [ 30.814287] ? get_unmapped_area+0x1f5/0x3f0 [ 30.814865] do_mmap+0x854/0xf00 [ 30.815317] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.815842] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.816426] ksys_mmap_pgoff+0x3af/0x500 [ 30.816958] do_syscall_64+0x3f/0x90 [ 30.817480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.818181] RIP: 0033:0x7f8d233b2d82 [ 30.818674] 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 [ 30.820960] RSP: 002b:00007ffcae03b618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.821920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d233b2d82 [ 30.822943] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d227ec000 [ 30.823858] RBP: 00007f8d227ec000 R08: 0000000000000009 R09: 0000000000001000 [ 30.824737] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5f7d10980 [ 30.825602] R13: 00007ffcae03b630 R14: 00007ffcae03b660 R15: 00007ffcae03b9c0 [ 30.826456] [ 30.826754] [ 30.826971] Allocated by task 213: [ 30.827398] kasan_save_stack+0x22/0x50 [ 30.827922] kasan_set_track+0x25/0x30 [ 30.828417] __kasan_slab_alloc+0x59/0x70 [ 30.828942] kmem_cache_alloc+0x16b/0x370 [ 30.829473] vm_area_dup+0x20/0x160 [ 30.829937] __split_vma+0x170/0x950 [ 30.830412] split_vma+0xc6/0x110 [ 30.830860] mprotect_fixup+0x8d2/0xb30 [ 30.831363] do_mprotect_pkey+0x87e/0xd40 [ 30.831900] __x64_sys_mprotect+0x78/0xc0 [ 30.832426] do_syscall_64+0x3f/0x90 [ 30.832913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833567] [ 30.833786] Freed by task 213: [ 30.834178] kasan_save_stack+0x22/0x50 [ 30.834684] kasan_set_track+0x25/0x30 [ 30.835175] kasan_save_free_info+0x2b/0x50 [ 30.835726] __kasan_slab_free+0x10a/0x190 [ 30.836252] kmem_cache_free+0x10d/0x4d0 [ 30.836754] rcu_core+0x8c8/0x2860 [ 30.837196] __do_softirq+0x1b7/0x7d4 [ 30.837676] [ 30.837889] Last potentially related work creation: [ 30.838467] kasan_save_stack+0x22/0x50 [ 30.838968] __kasan_record_aux_stack+0x8e/0xa0 [ 30.839544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.840178] remove_vma+0x139/0x170 [ 30.840624] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.841180] do_vmi_munmap+0x1f1/0x2b0 [ 30.841665] __vm_munmap+0x138/0x3a0 [ 30.842125] __x64_sys_munmap+0x59/0x80 [ 30.842619] do_syscall_64+0x3f/0x90 [ 30.843092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.843745] [ 30.843958] The buggy address belongs to the object at ffff88800b8afd98 [ 30.843958] which belongs to the cache vm_area_struct of size 168 [ 30.845416] The buggy address is located 88 bytes inside of [ 30.845416] freed 168-byte region [ffff88800b8afd98, ffff88800b8afe40) [ 30.846813] [ 30.847027] The buggy address belongs to the physical page: [ 30.847696] page:000000000b57d395 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb8af [ 30.848770] memcg:ffff88800fcc0001 [ 30.849191] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.849838] page_type: 0xffffffff() [ 30.850286] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.851190] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcc0001 [ 30.852102] page dumped because: kasan: bad access detected [ 30.852769] [ 30.852983] Memory state around the buggy address: [ 30.853562] ffff88800b8afc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.854408] ffff88800b8afd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.855251] >ffff88800b8afd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.856109] ^ [ 30.856912] ffff88800b8afe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.857759] ffff88800b8afe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.858600] ================================================================== [ 30.860016] Disabling lock debugging due to kernel taint [ 32.736454] BUG: Bad rss-counter state mm:0000000065c10e6c type:MM_FILEPAGES val:33 [ 32.737434] BUG: Bad rss-counter state mm:0000000065c10e6c type:MM_ANONPAGES val:22 [ 33.192854] BUG: Bad rss-counter state mm:00000000399bc067 type:MM_FILEPAGES val:33 [ 33.193840] BUG: Bad rss-counter state mm:00000000399bc067 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40465' (ECDSA) to the list of known hosts. 2023/06/20 21:14:27 fuzzer started 2023/06/20 21:14:27 dialing manager at localhost:36067 2023/06/20 21:14:27 checking machine... 2023/06/20 21:14:27 checking revisions... [ 33.864636] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:14:27 testing simple program... [ 33.915203] cgroup: Unknown subsys name 'net' [ 33.945691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:14:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe27a3ec28 CR3=0000000015f90000 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=2036323a34313a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34313a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad6a8 RBX=ffffffff85dbd7f8 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7fc RSP=ffff88806cf099b8 R8 =ffffffff860d8256 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007fa23f5fa900 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=00007ffe4828d000 CR3=000000000d828000 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=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