syzkaller login: [ 31.016594] BUG: Bad rss-counter state mm:000000005d2f1cce type:MM_FILEPAGES val:33 [ 31.017693] BUG: Bad rss-counter state mm:000000005d2f1cce type:MM_ANONPAGES val:22 [ 31.201043] ================================================================== [ 31.202244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.203310] Read of size 8 at addr ffff888016dc2a50 by task sshd/219 [ 31.204256] [ 31.204498] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.205453] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.206552] Call Trace: [ 31.206905] [ 31.207219] dump_stack_lvl+0x91/0xf0 [ 31.207765] print_report+0xcc/0x620 [ 31.208298] ? __virt_addr_valid+0x102/0x340 [ 31.208908] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.209587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210287] kasan_report+0xbe/0xf0 [ 31.210815] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211503] vma_interval_tree_remove+0xc75/0xec0 [ 31.212169] vma_prepare+0xc54/0x11a0 [ 31.212705] __split_vma+0x5af/0x950 [ 31.213230] ? __pfx___split_vma+0x10/0x10 [ 31.213818] ? find_held_lock+0x2c/0x110 [ 31.214418] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.215055] ? lock_is_held_type+0x9f/0x120 [ 31.215646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.216327] ? mtree_range_walk+0x632/0x900 [ 31.216938] ? mas_walk+0x5c7/0x7c0 [ 31.217462] do_vmi_munmap+0x1f1/0x2b0 [ 31.218004] mmap_region+0x1f9/0x2660 [ 31.218552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.219120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.219914] ? __pfx_lock_acquire+0x10/0x10 [ 31.220506] ? __pfx_mmap_region+0x10/0x10 [ 31.221094] ? security_mmap_addr+0x7d/0xa0 [ 31.221676] ? get_unmapped_area+0x1f5/0x3f0 [ 31.222312] do_mmap+0x854/0xf00 [ 31.222805] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.223352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.223974] ksys_mmap_pgoff+0x3af/0x500 [ 31.224540] do_syscall_64+0x3f/0x90 [ 31.225068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225775] RIP: 0033:0x7f7ca0d52d82 [ 31.226275] 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 [ 31.228583] RSP: 002b:00007ffc96bc2198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.229553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ca0d52d82 [ 31.230466] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ca018c000 [ 31.231375] RBP: 00007f7ca018c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.232275] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584c77afec0 [ 31.233182] R13: 00007ffc96bc21b0 R14: 00007ffc96bc21e0 R15: 00007ffc96bc2540 [ 31.234105] [ 31.234429] [ 31.234658] Allocated by task 212: [ 31.235125] kasan_save_stack+0x22/0x50 [ 31.235663] kasan_set_track+0x25/0x30 [ 31.236212] __kasan_slab_alloc+0x59/0x70 [ 31.236788] kmem_cache_alloc+0x16b/0x370 [ 31.237359] vm_area_dup+0x20/0x160 [ 31.237866] __split_vma+0x170/0x950 [ 31.238393] split_vma+0xc6/0x110 [ 31.238884] mprotect_fixup+0x8d2/0xb30 [ 31.239438] do_mprotect_pkey+0x87e/0xd40 [ 31.240028] __x64_sys_mprotect+0x78/0xc0 [ 31.240600] do_syscall_64+0x3f/0x90 [ 31.241125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241844] [ 31.242084] Freed by task 212: [ 31.242543] kasan_save_stack+0x22/0x50 [ 31.243101] kasan_set_track+0x25/0x30 [ 31.243648] kasan_save_free_info+0x2b/0x50 [ 31.244239] __kasan_slab_free+0x10a/0x190 [ 31.244838] kmem_cache_free+0x10d/0x4d0 [ 31.245398] rcu_core+0x8c8/0x2860 [ 31.245886] __do_softirq+0x1b7/0x7d4 [ 31.246424] [ 31.246664] Last potentially related work creation: [ 31.247310] kasan_save_stack+0x22/0x50 [ 31.247866] __kasan_record_aux_stack+0x8e/0xa0 [ 31.248504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.249216] remove_vma+0x139/0x170 [ 31.249725] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.250355] do_vmi_munmap+0x1f1/0x2b0 [ 31.250891] __vm_munmap+0x138/0x3a0 [ 31.251411] __x64_sys_munmap+0x59/0x80 [ 31.251965] do_syscall_64+0x3f/0x90 [ 31.252490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253207] [ 31.253448] The buggy address belongs to the object at ffff888016dc29f8 [ 31.253448] which belongs to the cache vm_area_struct of size 168 [ 31.255071] The buggy address is located 88 bytes inside of [ 31.255071] freed 168-byte region [ffff888016dc29f8, ffff888016dc2aa0) [ 31.256574] [ 31.256805] The buggy address belongs to the physical page: [ 31.257504] page:000000003d9f3560 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16dc2 [ 31.258676] memcg:ffff88800efc9b01 [ 31.259129] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.259811] page_type: 0xffffffff() [ 31.260292] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.261275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efc9b01 [ 31.262256] page dumped because: kasan: bad access detected [ 31.262964] [ 31.263195] Memory state around the buggy address: [ 31.263816] ffff888016dc2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.264741] ffff888016dc2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.265679] >ffff888016dc2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.266598] ^ [ 31.267356] ffff888016dc2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.268269] ffff888016dc2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.269182] ================================================================== [ 31.270273] Disabling lock debugging due to kernel taint [ 33.227564] BUG: Bad rss-counter state mm:0000000031c3058d type:MM_FILEPAGES val:33 [ 33.228756] BUG: Bad rss-counter state mm:0000000031c3058d type:MM_ANONPAGES val:22 [ 33.734031] BUG: Bad rss-counter state mm:00000000090ad78d type:MM_FILEPAGES val:33 [ 33.735289] BUG: Bad rss-counter state mm:00000000090ad78d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20860' (ECDSA) to the list of known hosts. 2023/06/19 20:44:42 fuzzer started 2023/06/19 20:44:42 dialing manager at localhost:44161 2023/06/19 20:44:42 checking machine... 2023/06/19 20:44:42 checking revisions... [ 34.489319] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:44:42 testing simple program... [ 34.550763] cgroup: Unknown subsys name 'net' [ 34.585295] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:44:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000366d80 RCX=0000000000000100 RDX=ffff88800879f500 RSI=ffffffff811431c2 RDI=0000777f80000000 RBP=0000000000000000 RSP=ffff88806ce09db0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6c88 R12=ffffffff81212ff0 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800d18ef00 RIP=ffffffff8180c49b RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f614f005900 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=00007f614f5bc618 CR3=00000000198aa000 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=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 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=00007f75c9f7f000 CR3=000000000c764000 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=340bb9b77a2877ad32438eeaf9726a8e XMM02=000000000011f0f8eff9b2d0a8fce9cb XMM03=000000000011f1c82c67c8bc2e329bc3 XMM04=119c53b13b724c8700000000000ae988 XMM05=24f4606b518ce57400000000001368f0 XMM06=806171799158d9670000000000135990 XMM07=e042d86d42eb936e0000000000126220 XMM08=5b5afc207e2f5466000000000011f1c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000