syzkaller login: [ 59.753622] BUG: Bad rss-counter state mm:000000007b590b20 type:MM_FILEPAGES val:33 [ 59.754617] BUG: Bad rss-counter state mm:000000007b590b20 type:MM_ANONPAGES val:22 [ 59.914299] ================================================================== [ 59.915401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.916583] Read of size 8 at addr ffff88800e7e76b0 by task sshd/219 [ 59.917523] [ 59.917963] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 59.919212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.920663] Call Trace: [ 59.921123] [ 59.921526] dump_stack_lvl+0x91/0xf0 [ 59.922226] print_report+0xcc/0x620 [ 59.922917] ? __virt_addr_valid+0x102/0x340 [ 59.923721] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.924641] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.925381] kasan_report+0xbe/0xf0 [ 59.925953] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.926696] vma_interval_tree_remove+0xc75/0xec0 [ 59.927418] vma_prepare+0xc54/0x11a0 [ 59.928003] __split_vma+0x5af/0x950 [ 59.928578] ? __pfx___split_vma+0x10/0x10 [ 59.929174] ? find_held_lock+0x2c/0x110 [ 59.929670] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.930228] ? lock_is_held_type+0x9f/0x120 [ 59.930740] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.931317] ? mtree_range_walk+0x632/0x900 [ 59.931842] ? mas_walk+0x5c7/0x7c0 [ 59.932299] do_vmi_munmap+0x1f1/0x2b0 [ 59.932771] mmap_region+0x1f9/0x2660 [ 59.933232] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.933717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.934401] ? __pfx_lock_acquire+0x10/0x10 [ 59.934902] ? __pfx_mmap_region+0x10/0x10 [ 59.935406] ? security_mmap_addr+0x7d/0xa0 [ 59.935909] ? get_unmapped_area+0x1f5/0x3f0 [ 59.936448] do_mmap+0x854/0xf00 [ 59.936866] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.937335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.937866] ksys_mmap_pgoff+0x3af/0x500 [ 59.938345] do_syscall_64+0x3f/0x90 [ 59.938810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.939419] RIP: 0033:0x7fc809226d82 [ 59.939861] 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 [ 59.941976] RSP: 002b:00007ffe08953d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.942871] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc809226d82 [ 59.943700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc808660000 [ 59.944546] RBP: 00007fc808660000 R08: 0000000000000009 R09: 0000000000001000 [ 59.945382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558489cebec0 [ 59.946212] R13: 00007ffe08953d20 R14: 00007ffe08953d50 R15: 00007ffe089540b0 [ 59.947065] [ 59.947350] [ 59.947555] Allocated by task 212: [ 59.947979] kasan_save_stack+0x22/0x50 [ 59.948481] kasan_set_track+0x25/0x30 [ 59.948947] __kasan_slab_alloc+0x59/0x70 [ 59.949460] kmem_cache_alloc+0x16b/0x370 [ 59.949967] vm_area_dup+0x20/0x160 [ 59.950423] __split_vma+0x170/0x950 [ 59.950879] split_vma+0xc6/0x110 [ 59.951310] mprotect_fixup+0x8d2/0xb30 [ 59.951803] do_mprotect_pkey+0x87e/0xd40 [ 59.952322] __x64_sys_mprotect+0x78/0xc0 [ 59.952836] do_syscall_64+0x3f/0x90 [ 59.953312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.953944] [ 59.954151] Freed by task 212: [ 59.954532] kasan_save_stack+0x22/0x50 [ 59.955024] kasan_set_track+0x25/0x30 [ 59.955505] kasan_save_free_info+0x2b/0x50 [ 59.956028] __kasan_slab_free+0x10a/0x190 [ 59.956575] kmem_cache_free+0x10d/0x4d0 [ 59.957083] rcu_core+0x8c8/0x2860 [ 59.957518] __do_softirq+0x1b7/0x7d4 [ 59.957993] [ 59.958200] Last potentially related work creation: [ 59.958775] kasan_save_stack+0x22/0x50 [ 59.959304] __kasan_record_aux_stack+0x8e/0xa0 [ 59.959869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.960514] remove_vma+0x139/0x170 [ 59.960957] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.961497] do_vmi_munmap+0x1f1/0x2b0 [ 59.961968] __vm_munmap+0x138/0x3a0 [ 59.962426] __x64_sys_munmap+0x59/0x80 [ 59.962918] do_syscall_64+0x3f/0x90 [ 59.963396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.964012] [ 59.964217] The buggy address belongs to the object at ffff88800e7e7658 [ 59.964217] which belongs to the cache vm_area_struct of size 168 [ 59.965611] The buggy address is located 88 bytes inside of [ 59.965611] freed 168-byte region [ffff88800e7e7658, ffff88800e7e7700) [ 59.966927] [ 59.967138] The buggy address belongs to the physical page: [ 59.967751] page:00000000cbc3fc5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7e7 [ 59.968774] memcg:ffff88800e88a401 [ 59.969175] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.969779] page_type: 0xffffffff() [ 59.970205] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 59.971065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e88a401 [ 59.971909] page dumped because: kasan: bad access detected [ 59.972533] [ 59.972739] Memory state around the buggy address: [ 59.973281] ffff88800e7e7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.974099] ffff88800e7e7600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 59.974917] >ffff88800e7e7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.975741] ^ [ 59.976328] ffff88800e7e7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 59.977162] ffff88800e7e7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 59.977976] ================================================================== [ 59.978944] Disabling lock debugging due to kernel taint [ 62.438774] BUG: Bad rss-counter state mm:00000000802f68d9 type:MM_FILEPAGES val:33 [ 62.440099] BUG: Bad rss-counter state mm:00000000802f68d9 type:MM_ANONPAGES val:22 [ 62.927966] BUG: Bad rss-counter state mm:000000002f8d970a type:MM_FILEPAGES val:33 [ 62.929344] BUG: Bad rss-counter state mm:000000002f8d970a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39032' (ECDSA) to the list of known hosts. 2023/06/20 22:22:03 fuzzer started 2023/06/20 22:22:03 dialing manager at localhost:36067 2023/06/20 22:22:03 checking machine... 2023/06/20 22:22:03 checking revisions... [ 63.603814] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:22:03 testing simple program... [ 63.661826] cgroup: Unknown subsys name 'net' [ 63.700132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:22:03 Registers: info registers vcpu 0 RAX=ffffffff810bd033 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016cc7a01 RSI=ffff888016cc7a90 RDI=ffff888016cc7a90 RBP=ffff888016cc7af0 RSP=ffff888016cc79d0 R8 =ffffffff86098096 R9 =ffff888016cc7ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff888016cc7af8 R13=ffff888016cc7ae0 R14=ffff888016cc7a98 R15=ffff888016cc7a98 RIP=ffffffff8112fbf3 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 00007fbd75a58900 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=00007fbd760100b0 CR3=00000000169d4000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f3dd8b6bee0 CR3=000000000cb74000 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=ed6771d8dbc422aa0144e437d59d8029 XMM02=2c67c8bc2e329bc3000000000011abd0 XMM03=fb795ef6d65770560000000000122440 XMM04=7e424196403b020100000000000ae988 XMM05=dfcdbad4f1609c3700000000001322a8 XMM06=66b77d03435dfdee0000000000131110 XMM07=e042d86d42eb936e00000000001226c0 XMM08=56d585ba0f48a304000000000011ac30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000