syzkaller login: [ 32.021812] BUG: Bad rss-counter state mm:000000005029753d type:MM_FILEPAGES val:33 [ 32.023942] BUG: Bad rss-counter state mm:000000005029753d type:MM_ANONPAGES val:22 [ 32.197367] ================================================================== [ 32.198289] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.199305] Read of size 8 at addr ffff88800fd34798 by task sshd/220 [ 32.200280] [ 32.200523] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.201517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.202527] Call Trace: [ 32.202892] [ 32.203218] dump_stack_lvl+0x91/0xf0 [ 32.203802] print_report+0xcc/0x620 [ 32.204381] ? __virt_addr_valid+0x102/0x340 [ 32.205013] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.205718] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.206432] kasan_report+0xbe/0xf0 [ 32.206983] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.207686] vma_interval_tree_remove+0xc75/0xec0 [ 32.208306] vma_prepare+0xc54/0x11a0 [ 32.208844] __split_vma+0x5af/0x950 [ 32.209383] ? __pfx___split_vma+0x10/0x10 [ 32.209992] ? find_held_lock+0x2c/0x110 [ 32.210585] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.211182] ? lock_is_held_type+0x9f/0x120 [ 32.211803] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.212486] ? mtree_range_walk+0x632/0x900 [ 32.213121] ? mas_walk+0x5c7/0x7c0 [ 32.213667] do_vmi_munmap+0x1f1/0x2b0 [ 32.214227] mmap_region+0x1f9/0x2660 [ 32.214782] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.215366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.216202] ? __pfx_lock_acquire+0x10/0x10 [ 32.216811] ? __pfx_mmap_region+0x10/0x10 [ 32.217428] ? security_mmap_addr+0x7d/0xa0 [ 32.217974] ? get_unmapped_area+0x1f5/0x3f0 [ 32.218533] do_mmap+0x854/0xf00 [ 32.219032] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.219607] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.220272] ksys_mmap_pgoff+0x3af/0x500 [ 32.220861] do_syscall_64+0x3f/0x90 [ 32.221413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.222068] RIP: 0033:0x7f76c596cd82 [ 32.222528] 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 [ 32.225012] RSP: 002b:00007ffed4e65c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.226062] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76c596cd82 [ 32.226982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76c4da6000 [ 32.227846] RBP: 00007f76c4da6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.228700] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e12bf6cec0 [ 32.229557] R13: 00007ffed4e65c90 R14: 00007ffed4e65cc0 R15: 00007ffed4e66020 [ 32.230427] [ 32.230727] [ 32.230948] Allocated by task 213: [ 32.231374] kasan_save_stack+0x22/0x50 [ 32.231884] kasan_set_track+0x25/0x30 [ 32.232384] __kasan_slab_alloc+0x59/0x70 [ 32.232916] kmem_cache_alloc+0x16b/0x370 [ 32.233435] vm_area_dup+0x20/0x160 [ 32.233907] __split_vma+0x170/0x950 [ 32.234381] split_vma+0xc6/0x110 [ 32.234829] mprotect_fixup+0x8d2/0xb30 [ 32.235338] do_mprotect_pkey+0x87e/0xd40 [ 32.235875] __x64_sys_mprotect+0x78/0xc0 [ 32.236398] do_syscall_64+0x3f/0x90 [ 32.236876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.237524] [ 32.237741] Freed by task 13: [ 32.238124] kasan_save_stack+0x22/0x50 [ 32.238647] kasan_set_track+0x25/0x30 [ 32.239141] kasan_save_free_info+0x2b/0x50 [ 32.239689] __kasan_slab_free+0x10a/0x190 [ 32.240232] kmem_cache_free+0x10d/0x4d0 [ 32.240752] rcu_core+0x8c8/0x2860 [ 32.241206] __do_softirq+0x1b7/0x7d4 [ 32.241705] [ 32.241922] Last potentially related work creation: [ 32.242507] kasan_save_stack+0x22/0x50 [ 32.243027] __kasan_record_aux_stack+0x8e/0xa0 [ 32.243609] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.244276] remove_vma+0x139/0x170 [ 32.244738] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.245310] do_vmi_munmap+0x1f1/0x2b0 [ 32.245819] __vm_munmap+0x138/0x3a0 [ 32.246290] __x64_sys_munmap+0x59/0x80 [ 32.246810] do_syscall_64+0x3f/0x90 [ 32.247291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.247965] [ 32.248185] The buggy address belongs to the object at ffff88800fd34740 [ 32.248185] which belongs to the cache vm_area_struct of size 168 [ 32.249699] The buggy address is located 88 bytes inside of [ 32.249699] freed 168-byte region [ffff88800fd34740, ffff88800fd347e8) [ 32.251142] [ 32.251358] The buggy address belongs to the physical page: [ 32.252050] page:000000008c2cb810 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd34 [ 32.253163] memcg:ffff888017f41501 [ 32.253614] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.254268] page_type: 0xffffffff() [ 32.254736] raw: 0100000000000200 ffff88800879fc80 ffffea0000690fc0 dead000000000006 [ 32.255699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f41501 [ 32.256642] page dumped because: kasan: bad access detected [ 32.257326] [ 32.257554] Memory state around the buggy address: [ 32.258140] ffff88800fd34680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.259024] ffff88800fd34700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.259925] >ffff88800fd34780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.260824] ^ [ 32.261345] ffff88800fd34800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.262226] ffff88800fd34880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.263103] ================================================================== [ 32.264116] Disabling lock debugging due to kernel taint [ 34.220870] BUG: Bad rss-counter state mm:00000000be3797af type:MM_FILEPAGES val:33 [ 34.222500] BUG: Bad rss-counter state mm:00000000be3797af type:MM_ANONPAGES val:22 [ 34.662252] BUG: Bad rss-counter state mm:00000000b38339e0 type:MM_FILEPAGES val:33 [ 34.663894] BUG: Bad rss-counter state mm:00000000b38339e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38168' (ECDSA) to the list of known hosts. 2023/06/19 12:56:36 fuzzer started 2023/06/19 12:56:36 dialing manager at localhost:44161 2023/06/19 12:56:36 checking machine... 2023/06/19 12:56:36 checking revisions... [ 35.350248] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:56:36 testing simple program... [ 35.404605] cgroup: Unknown subsys name 'net' [ 35.458311] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:56:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ef055f0 RCX=ffff88800844f780 RDX=ffffea00003bc140 RSI=ffff88800ef05130 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800da37600 R8 =ffff88800ef054c0 R9 =0000000000000000 R10=ffffea00003bc140 R11=00000000800d000b R12=dffffc0000000000 R13=ffff88800da37640 R14=ffff88800844f780 R15=ffff88800ef05130 RIP=ffffffff81810196 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 00007f3d39bb5900 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=0000564c93db1768 CR3=000000000f2aa000 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=d4b9560fc24cb1c100000000000ae988 XMM05=2f5545ef653536960000000000134be8 XMM06=4fda316b135da52b0000000000133c88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800ff20000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab3fa9 RDI=ffff88800ff203f4 RBP=ffff88800ff20000 RSP=ffff8880164a74f0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000049 R11=00000a6400000a64 R12=0000000000000000 R13=0000000000000049 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8135bd9a 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 00007f1178e26900 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=00007f11793dd618 CR3=000000000eca2000 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