syzkaller login: [ 30.704944] BUG: Bad rss-counter state mm:000000003d462849 type:MM_FILEPAGES val:33 [ 30.706715] BUG: Bad rss-counter state mm:000000003d462849 type:MM_ANONPAGES val:22 [ 30.865329] ================================================================== [ 30.866251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.867202] Read of size 8 at addr ffff888018fdfa50 by task sshd/220 [ 30.868167] [ 30.868404] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.869266] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.870231] Call Trace: [ 30.870548] [ 30.870828] dump_stack_lvl+0x91/0xf0 [ 30.871326] print_report+0xcc/0x620 [ 30.871835] ? __virt_addr_valid+0x102/0x340 [ 30.872387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873003] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.873618] kasan_report+0xbe/0xf0 [ 30.874096] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874721] vma_interval_tree_remove+0xc75/0xec0 [ 30.875330] vma_prepare+0xc54/0x11a0 [ 30.875821] __split_vma+0x5af/0x950 [ 30.876295] ? __pfx___split_vma+0x10/0x10 [ 30.876820] ? find_held_lock+0x2c/0x110 [ 30.877344] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.877915] ? lock_is_held_type+0x9f/0x120 [ 30.878455] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.879062] ? mtree_range_walk+0x632/0x900 [ 30.879627] ? mas_walk+0x5c7/0x7c0 [ 30.880104] do_vmi_munmap+0x1f1/0x2b0 [ 30.880591] mmap_region+0x1f9/0x2660 [ 30.881077] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.881588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.882303] ? __pfx_lock_acquire+0x10/0x10 [ 30.882838] ? __pfx_mmap_region+0x10/0x10 [ 30.883370] ? security_mmap_addr+0x7d/0xa0 [ 30.883908] ? get_unmapped_area+0x1f5/0x3f0 [ 30.884458] do_mmap+0x854/0xf00 [ 30.884903] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.885401] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.885962] ksys_mmap_pgoff+0x3af/0x500 [ 30.886467] do_syscall_64+0x3f/0x90 [ 30.886955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887620] RIP: 0033:0x7f444e025d82 [ 30.888076] 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 [ 30.890208] RSP: 002b:00007ffdb6051ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.891110] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f444e025d82 [ 30.891975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f444d45f000 [ 30.892828] RBP: 00007f444d45f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.893682] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578d101d980 [ 30.894533] R13: 00007ffdb6051b00 R14: 00007ffdb6051b30 R15: 00007ffdb6051e90 [ 30.895395] [ 30.895704] [ 30.895924] Allocated by task 213: [ 30.896364] kasan_save_stack+0x22/0x50 [ 30.896883] kasan_set_track+0x25/0x30 [ 30.897378] __kasan_slab_alloc+0x59/0x70 [ 30.897904] kmem_cache_alloc+0x16b/0x370 [ 30.898421] vm_area_dup+0x20/0x160 [ 30.898881] __split_vma+0x170/0x950 [ 30.899355] split_vma+0xc6/0x110 [ 30.899808] mprotect_fixup+0x8d2/0xb30 [ 30.900310] do_mprotect_pkey+0x87e/0xd40 [ 30.900835] __x64_sys_mprotect+0x78/0xc0 [ 30.901360] do_syscall_64+0x3f/0x90 [ 30.901832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902478] [ 30.902691] Freed by task 213: [ 30.903087] kasan_save_stack+0x22/0x50 [ 30.903611] kasan_set_track+0x25/0x30 [ 30.904108] kasan_save_free_info+0x2b/0x50 [ 30.904643] __kasan_slab_free+0x10a/0x190 [ 30.905170] kmem_cache_free+0x10d/0x4d0 [ 30.905683] rcu_core+0x8c8/0x2860 [ 30.906127] __do_softirq+0x1b7/0x7d4 [ 30.906605] [ 30.906822] Last potentially related work creation: [ 30.907404] kasan_save_stack+0x22/0x50 [ 30.907922] __kasan_record_aux_stack+0x8e/0xa0 [ 30.908515] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.909248] remove_vma+0x139/0x170 [ 30.909701] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.910265] do_vmi_munmap+0x1f1/0x2b0 [ 30.910748] __vm_munmap+0x138/0x3a0 [ 30.911217] __x64_sys_munmap+0x59/0x80 [ 30.911733] do_syscall_64+0x3f/0x90 [ 30.912207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.912864] [ 30.913080] The buggy address belongs to the object at ffff888018fdf9f8 [ 30.913080] which belongs to the cache vm_area_struct of size 168 [ 30.914538] The buggy address is located 88 bytes inside of [ 30.914538] freed 168-byte region [ffff888018fdf9f8, ffff888018fdfaa0) [ 30.915945] [ 30.916162] The buggy address belongs to the physical page: [ 30.916818] page:00000000e0258c71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fdf [ 30.917912] memcg:ffff88800dbe6001 [ 30.918340] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.918987] page_type: 0xffffffff() [ 30.919435] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.920358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbe6001 [ 30.921259] page dumped because: kasan: bad access detected [ 30.921924] [ 30.922140] Memory state around the buggy address: [ 30.922717] ffff888018fdf900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.923589] ffff888018fdf980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.924445] >ffff888018fdfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.925299] ^ [ 30.925999] ffff888018fdfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.926852] ffff888018fdfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.927716] ================================================================== [ 30.928663] Disabling lock debugging due to kernel taint [ 32.866974] BUG: Bad rss-counter state mm:00000000f89ae82e type:MM_FILEPAGES val:33 [ 32.867732] BUG: Bad rss-counter state mm:00000000f89ae82e type:MM_ANONPAGES val:22 [ 33.324484] BUG: Bad rss-counter state mm:00000000da648b5c type:MM_FILEPAGES val:33 [ 33.326045] BUG: Bad rss-counter state mm:00000000da648b5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4213' (ECDSA) to the list of known hosts. 2023/06/20 22:42:51 fuzzer started 2023/06/20 22:42:52 dialing manager at localhost:36067 2023/06/20 22:42:52 checking machine... 2023/06/20 22:42:52 checking revisions... [ 34.102902] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:42:52 testing simple program... [ 34.145438] cgroup: Unknown subsys name 'net' [ 34.196112] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:42:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000004b RCX=ffffffff83723e1a RDX=ffff888016f551c0 RSI=0000000000000000 RDI=0000000000000004 RBP=000000000000004c RSP=ffff88801987f7b8 R8 =0000000000000004 R9 =000000000000000a R10=000000000000004b R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99d38 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c086b RFL=00000293 [--S-A-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 00007f82423e8900 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=00007f824299f618 CR3=0000000014758000 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=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88800d83f868 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d7d R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007fa87a2b2900 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=00007fa8797c0038 CR3=000000000d594000 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=b3285ca56c489dff0000000000109b48 XMM01=f1a91af78ac9ee9f234a97b6195139aa XMM02=ec2efd57dc4c00df000000000011cbe8 XMM03=fc28b82f882f7aca000000000011ccb8 XMM04=d8fe9fcbe66e245c00000000000ae988 XMM05=19e9129bd510f23500000000001314f8 XMM06=17bcc40d66d3194a0000000000130360 XMM07=e042d86d42eb936e0000000000121900 XMM08=fc28b82f882f7aca000000000011ccb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000