syzkaller login: [ 41.752475] BUG: Bad rss-counter state mm:00000000dca83a82 type:MM_FILEPAGES val:33 [ 41.753581] BUG: Bad rss-counter state mm:00000000dca83a82 type:MM_ANONPAGES val:22 [ 41.854306] ================================================================== [ 41.854890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.855490] Read of size 8 at addr ffff88801aa15ed8 by task sshd/220 [ 41.855982] [ 41.856119] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.856676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.857298] Call Trace: [ 41.857504] [ 41.857699] dump_stack_lvl+0x91/0xf0 [ 41.858014] print_report+0xcc/0x620 [ 41.858325] ? __virt_addr_valid+0x102/0x340 [ 41.858677] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.859066] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.859561] kasan_report+0xbe/0xf0 [ 41.859863] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.860255] vma_interval_tree_remove+0xc75/0xec0 [ 41.860645] vma_prepare+0xc54/0x11a0 [ 41.860950] __split_vma+0x5af/0x950 [ 41.861248] ? __pfx___split_vma+0x10/0x10 [ 41.861602] ? find_held_lock+0x2c/0x110 [ 41.861940] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.862296] ? lock_is_held_type+0x9f/0x120 [ 41.862635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.863021] ? mtree_range_walk+0x632/0x900 [ 41.863371] ? mas_walk+0x5c7/0x7c0 [ 41.863676] do_vmi_munmap+0x1f1/0x2b0 [ 41.863994] mmap_region+0x1f9/0x2660 [ 41.864311] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.864643] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.865105] ? __pfx_lock_acquire+0x10/0x10 [ 41.865454] ? __pfx_mmap_region+0x10/0x10 [ 41.865791] ? security_mmap_addr+0x7d/0xa0 [ 41.866135] ? get_unmapped_area+0x1f5/0x3f0 [ 41.866488] do_mmap+0x854/0xf00 [ 41.866771] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.867085] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.867448] ksys_mmap_pgoff+0x3af/0x500 [ 41.867777] do_syscall_64+0x3f/0x90 [ 41.868087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.868498] RIP: 0033:0x7fdd8cfc4d82 [ 41.868795] 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 [ 41.870200] RSP: 002b:00007ffd9c5c8378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.870789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdd8cfc4d82 [ 41.871339] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdd8c3fe000 [ 41.871888] RBP: 00007fdd8c3fe000 R08: 0000000000000009 R09: 0000000000001000 [ 41.872443] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3de8eff70 [ 41.872994] R13: 00007ffd9c5c8390 R14: 00007ffd9c5c83c0 R15: 00007ffd9c5c8720 [ 41.873556] [ 41.873749] [ 41.873890] Allocated by task 213: [ 41.874173] kasan_save_stack+0x22/0x50 [ 41.874509] kasan_set_track+0x25/0x30 [ 41.874824] __kasan_slab_alloc+0x59/0x70 [ 41.875162] kmem_cache_alloc+0x16b/0x370 [ 41.875496] vm_area_dup+0x20/0x160 [ 41.875792] __split_vma+0x170/0x950 [ 41.876098] split_vma+0xc6/0x110 [ 41.876387] mprotect_fixup+0x8d2/0xb30 [ 41.876715] do_mprotect_pkey+0x87e/0xd40 [ 41.877051] __x64_sys_mprotect+0x78/0xc0 [ 41.877389] do_syscall_64+0x3f/0x90 [ 41.877695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.878106] [ 41.878243] Freed by task 213: [ 41.878493] kasan_save_stack+0x22/0x50 [ 41.878826] kasan_set_track+0x25/0x30 [ 41.879146] kasan_save_free_info+0x2b/0x50 [ 41.879492] __kasan_slab_free+0x10a/0x190 [ 41.879835] kmem_cache_free+0x10d/0x4d0 [ 41.880160] rcu_core+0x8c8/0x2860 [ 41.880449] __do_softirq+0x1b7/0x7d4 [ 41.880752] [ 41.880889] Last potentially related work creation: [ 41.881271] kasan_save_stack+0x22/0x50 [ 41.881589] __kasan_record_aux_stack+0x8e/0xa0 [ 41.881976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.882398] remove_vma+0x139/0x170 [ 41.882689] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.883053] do_vmi_munmap+0x1f1/0x2b0 [ 41.883368] __vm_munmap+0x138/0x3a0 [ 41.883670] __x64_sys_munmap+0x59/0x80 [ 41.883988] do_syscall_64+0x3f/0x90 [ 41.884293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.884703] [ 41.884847] The buggy address belongs to the object at ffff88801aa15e80 [ 41.884847] which belongs to the cache vm_area_struct of size 168 [ 41.885807] The buggy address is located 88 bytes inside of [ 41.885807] freed 168-byte region [ffff88801aa15e80, ffff88801aa15f28) [ 41.886726] [ 41.886868] The buggy address belongs to the physical page: [ 41.887298] page:0000000057e4bb92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa15 [ 41.888011] memcg:ffff88800e8b5201 [ 41.888288] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.888706] page_type: 0xffffffff() [ 41.888996] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.889591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8b5201 [ 41.890188] page dumped because: kasan: bad access detected [ 41.890614] [ 41.890761] Memory state around the buggy address: [ 41.891139] ffff88801aa15d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.891698] ffff88801aa15e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.892252] >ffff88801aa15e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.892807] ^ [ 41.893281] ffff88801aa15f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.893839] ffff88801aa15f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.894398] ================================================================== [ 41.895066] Disabling lock debugging due to kernel taint [ 43.804799] BUG: Bad rss-counter state mm:000000002410c3fe type:MM_FILEPAGES val:33 [ 43.805974] BUG: Bad rss-counter state mm:000000002410c3fe type:MM_ANONPAGES val:22 [ 44.281884] BUG: Bad rss-counter state mm:00000000291e341f type:MM_FILEPAGES val:33 [ 44.282878] BUG: Bad rss-counter state mm:00000000291e341f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33554' (ECDSA) to the list of known hosts. 2023/06/20 03:36:25 fuzzer started 2023/06/20 03:36:25 dialing manager at localhost:44161 2023/06/20 03:36:25 checking machine... 2023/06/20 03:36:25 checking revisions... [ 44.916037] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:36:25 testing simple program... [ 44.967037] cgroup: Unknown subsys name 'net' [ 45.016188] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:36:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09928 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 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=00007ffe4fd252f8 CR3=0000000005482000 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=00007ff6551ad510000055bdc59a7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc075e RBX=ffffffff85e03af4 RCX=ffffffff8186cb43 RDX=0000000000000000 RSI=ffffffff86141e76 RDI=ffffffff85e03af0 RBP=ffffffff85e03af0 RSP=ffff88801436f530 R8 =ffffffff86141e76 R9 =ffff88801436f628 R10=0000000000038001 R11=00000000000229c7 R12=ffffffff85e03af8 R13=ffffffff85e03af0 R14=ffffffff85e03af0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007fbb70a03900 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=00007fb646722650 CR3=000000000c554000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=979a50581c4f95d700000000000ae988 XMM05=459bbc4f218d27040000000000136730 XMM06=19e9129bd510f23500000000001355c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000