syzkaller login: [ 31.237035] BUG: Bad rss-counter state mm:000000005d173ece type:MM_FILEPAGES val:33 [ 31.238241] BUG: Bad rss-counter state mm:000000005d173ece type:MM_ANONPAGES val:22 [ 31.279060] ================================================================== [ 31.279963] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.280935] Read of size 8 at addr ffff888018e08798 by task sshd/219 [ 31.281709] [ 31.281929] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.282806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.283803] Call Trace: [ 31.284122] [ 31.284406] dump_stack_lvl+0x91/0xf0 [ 31.284895] print_report+0xcc/0x620 [ 31.285384] ? __virt_addr_valid+0x102/0x340 [ 31.285940] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286566] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.287191] kasan_report+0xbe/0xf0 [ 31.287673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.288301] vma_interval_tree_remove+0xc75/0xec0 [ 31.288926] vma_prepare+0xc54/0x11a0 [ 31.289414] __split_vma+0x5af/0x950 [ 31.289891] ? __pfx___split_vma+0x10/0x10 [ 31.290439] ? find_held_lock+0x2c/0x110 [ 31.290984] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.291563] ? lock_is_held_type+0x9f/0x120 [ 31.292118] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.292743] ? mtree_range_walk+0x632/0x900 [ 31.293307] ? mas_walk+0x5c7/0x7c0 [ 31.293789] do_vmi_munmap+0x1f1/0x2b0 [ 31.294297] mmap_region+0x1f9/0x2660 [ 31.294784] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.295326] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.296048] ? __pfx_lock_acquire+0x10/0x10 [ 31.296599] ? __pfx_mmap_region+0x10/0x10 [ 31.297144] ? security_mmap_addr+0x7d/0xa0 [ 31.297677] ? get_unmapped_area+0x1f5/0x3f0 [ 31.298247] do_mmap+0x854/0xf00 [ 31.298702] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.299226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.299806] ksys_mmap_pgoff+0x3af/0x500 [ 31.300324] do_syscall_64+0x3f/0x90 [ 31.300803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301470] RIP: 0033:0x7ff199084d82 [ 31.301935] 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 [ 31.304157] RSP: 002b:00007ffd3e79f1d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.305188] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff199084d82 [ 31.306061] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1984be000 [ 31.306935] RBP: 00007ff1984be000 R08: 0000000000000009 R09: 0000000000001000 [ 31.307793] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfd5581ec0 [ 31.308655] R13: 00007ffd3e79f1f0 R14: 00007ffd3e79f220 R15: 00007ffd3e79f580 [ 31.309525] [ 31.309819] [ 31.310036] Allocated by task 212: [ 31.310475] kasan_save_stack+0x22/0x50 [ 31.311002] kasan_set_track+0x25/0x30 [ 31.311516] __kasan_slab_alloc+0x59/0x70 [ 31.312047] kmem_cache_alloc+0x16b/0x370 [ 31.312571] vm_area_dup+0x20/0x160 [ 31.313034] __split_vma+0x170/0x950 [ 31.313508] split_vma+0xc6/0x110 [ 31.313951] mprotect_fixup+0x8d2/0xb30 [ 31.314463] do_mprotect_pkey+0x87e/0xd40 [ 31.315015] __x64_sys_mprotect+0x78/0xc0 [ 31.315554] do_syscall_64+0x3f/0x90 [ 31.316037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.316700] [ 31.316918] Freed by task 212: [ 31.317318] kasan_save_stack+0x22/0x50 [ 31.317825] kasan_set_track+0x25/0x30 [ 31.318337] kasan_save_free_info+0x2b/0x50 [ 31.318874] __kasan_slab_free+0x10a/0x190 [ 31.319435] kmem_cache_free+0x10d/0x4d0 [ 31.319959] rcu_core+0x8c8/0x2860 [ 31.320413] __do_softirq+0x1b7/0x7d4 [ 31.320898] [ 31.321121] Last potentially related work creation: [ 31.321721] kasan_save_stack+0x22/0x50 [ 31.322237] __kasan_record_aux_stack+0x8e/0xa0 [ 31.322826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.323503] remove_vma+0x139/0x170 [ 31.323959] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.324532] do_vmi_munmap+0x1f1/0x2b0 [ 31.325031] __vm_munmap+0x138/0x3a0 [ 31.325510] __x64_sys_munmap+0x59/0x80 [ 31.326016] do_syscall_64+0x3f/0x90 [ 31.326493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.327146] [ 31.327363] The buggy address belongs to the object at ffff888018e08740 [ 31.327363] which belongs to the cache vm_area_struct of size 168 [ 31.328847] The buggy address is located 88 bytes inside of [ 31.328847] freed 168-byte region [ffff888018e08740, ffff888018e087e8) [ 31.330277] [ 31.330496] The buggy address belongs to the physical page: [ 31.331184] page:000000001b31b17d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e08 [ 31.332289] memcg:ffff8880143e7901 [ 31.332720] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.333368] page_type: 0xffffffff() [ 31.333821] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.334747] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880143e7901 [ 31.335667] page dumped because: kasan: bad access detected [ 31.336340] [ 31.336557] Memory state around the buggy address: [ 31.337143] ffff888018e08680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.338012] ffff888018e08700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.338874] >ffff888018e08780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.339761] ^ [ 31.340258] ffff888018e08800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.341139] ffff888018e08880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.342010] ================================================================== [ 31.343244] Disabling lock debugging due to kernel taint [ 33.239918] BUG: Bad rss-counter state mm:00000000ab78d4c1 type:MM_FILEPAGES val:33 [ 33.241541] BUG: Bad rss-counter state mm:00000000ab78d4c1 type:MM_ANONPAGES val:22 [ 33.707411] BUG: Bad rss-counter state mm:00000000c9ec27dd type:MM_FILEPAGES val:33 [ 33.708442] BUG: Bad rss-counter state mm:00000000c9ec27dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20322' (ECDSA) to the list of known hosts. 2023/06/19 15:59:13 fuzzer started 2023/06/19 15:59:13 dialing manager at localhost:44161 2023/06/19 15:59:13 checking machine... 2023/06/19 15:59:13 checking revisions... [ 34.495814] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:59:14 testing simple program... [ 34.545375] cgroup: Unknown subsys name 'net' [ 34.604129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:59:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861371f0 RDX=0000000000000008 RSI=ffff88801591f910 RDI=ffff88801591f520 RBP=ffff88801591f578 RSP=ffff88801591f4a8 R8 =0000000000000001 R9 =ffff88801591f560 R10=0000000000038001 R11=0000000000020d06 R12=ffff88801591f580 R13=ffff88801591f568 R14=ffff88801591f910 R15=ffff88801591f520 RIP=ffffffff811303fa RFL=00000283 [--S---C] 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 00007f3bd17c9700 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=00007ff3b67c4618 CR3=0000000015b26000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033313a3935 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c58400 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=00007fde9eae3320 CR3=000000000d568000 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=947b10fa05a32ca3b14ac0b675b5e3f1 XMM02=000000000011ba58ec2efd57dc4c00df XMM03=0000000000123288ecabd7c6d07de181 XMM04=f3dd7992592ed27800000000000ae988 XMM05=b7b7cacc5d736b8a0000000000133078 XMM06=806171799158d9670000000000132d00 XMM07=e042d86d42eb936e0000000000123508 XMM08=ecabd7c6d07de181000000000011bab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000