syzkaller login: [ 38.534419] BUG: Bad rss-counter state mm:0000000049737973 type:MM_FILEPAGES val:33 [ 38.535730] BUG: Bad rss-counter state mm:0000000049737973 type:MM_ANONPAGES val:22 [ 38.694595] ================================================================== [ 38.695493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.696437] Read of size 8 at addr ffff8880164c8968 by task sshd/219 [ 38.697273] [ 38.697515] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.698369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.699342] Call Trace: [ 38.699674] [ 38.699959] dump_stack_lvl+0x91/0xf0 [ 38.700450] print_report+0xcc/0x620 [ 38.700929] ? __virt_addr_valid+0x102/0x340 [ 38.701478] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.702080] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.702694] kasan_report+0xbe/0xf0 [ 38.703164] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.703807] vma_interval_tree_remove+0xc75/0xec0 [ 38.704414] vma_prepare+0xc54/0x11a0 [ 38.704888] __split_vma+0x5af/0x950 [ 38.705355] ? __pfx___split_vma+0x10/0x10 [ 38.705881] ? find_held_lock+0x2c/0x110 [ 38.706393] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.706947] ? lock_is_held_type+0x9f/0x120 [ 38.707492] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.708104] ? mtree_range_walk+0x632/0x900 [ 38.708652] ? mas_walk+0x5c7/0x7c0 [ 38.709124] do_vmi_munmap+0x1f1/0x2b0 [ 38.709609] mmap_region+0x1f9/0x2660 [ 38.710084] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.710589] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.711296] ? __pfx_lock_acquire+0x10/0x10 [ 38.711837] ? __pfx_mmap_region+0x10/0x10 [ 38.712365] ? security_mmap_addr+0x7d/0xa0 [ 38.712887] ? get_unmapped_area+0x1f5/0x3f0 [ 38.713426] do_mmap+0x854/0xf00 [ 38.713864] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.714356] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.714919] ksys_mmap_pgoff+0x3af/0x500 [ 38.715416] do_syscall_64+0x3f/0x90 [ 38.715912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.716553] RIP: 0033:0x7fcb42748d82 [ 38.717009] 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 [ 38.719096] RSP: 002b:00007ffc00d58f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.720009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb42748d82 [ 38.720843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb41b82000 [ 38.721673] RBP: 00007fcb41b82000 R08: 0000000000000009 R09: 0000000000001000 [ 38.722508] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636c39b4980 [ 38.723342] R13: 00007ffc00d58f70 R14: 00007ffc00d58fa0 R15: 00007ffc00d59300 [ 38.724193] [ 38.724483] [ 38.724695] Allocated by task 212: [ 38.725115] kasan_save_stack+0x22/0x50 [ 38.725622] kasan_set_track+0x25/0x30 [ 38.726110] __kasan_slab_alloc+0x59/0x70 [ 38.726627] kmem_cache_alloc+0x16b/0x370 [ 38.727137] vm_area_dup+0x20/0x160 [ 38.727586] __split_vma+0x170/0x950 [ 38.728070] split_vma+0xc6/0x110 [ 38.728507] mprotect_fixup+0x8d2/0xb30 [ 38.729002] do_mprotect_pkey+0x87e/0xd40 [ 38.729513] __x64_sys_mprotect+0x78/0xc0 [ 38.730026] do_syscall_64+0x3f/0x90 [ 38.730499] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.731132] [ 38.731344] Freed by task 19: [ 38.731731] kasan_save_stack+0x22/0x50 [ 38.732229] kasan_set_track+0x25/0x30 [ 38.732714] kasan_save_free_info+0x2b/0x50 [ 38.733235] __kasan_slab_free+0x10a/0x190 [ 38.733770] kmem_cache_free+0x10d/0x4d0 [ 38.734267] rcu_core+0x8c8/0x2860 [ 38.734710] __do_softirq+0x1b7/0x7d4 [ 38.735181] [ 38.735392] Last potentially related work creation: [ 38.735984] kasan_save_stack+0x22/0x50 [ 38.736482] __kasan_record_aux_stack+0x8e/0xa0 [ 38.737056] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.737697] remove_vma+0x139/0x170 [ 38.738143] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.738690] do_vmi_munmap+0x1f1/0x2b0 [ 38.739167] __vm_munmap+0x138/0x3a0 [ 38.739642] __x64_sys_munmap+0x59/0x80 [ 38.740133] do_syscall_64+0x3f/0x90 [ 38.740602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.741236] [ 38.741449] The buggy address belongs to the object at ffff8880164c8910 [ 38.741449] which belongs to the cache vm_area_struct of size 168 [ 38.742907] The buggy address is located 88 bytes inside of [ 38.742907] freed 168-byte region [ffff8880164c8910, ffff8880164c89b8) [ 38.744310] [ 38.744523] The buggy address belongs to the physical page: [ 38.745167] page:00000000aae41776 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164c8 [ 38.746247] memcg:ffff88800fe49401 [ 38.746665] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.747348] page_type: 0xffffffff() [ 38.747799] raw: 0100000000000200 ffff8880087a0c80 ffffea0000362640 dead000000000003 [ 38.748707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe49401 [ 38.749596] page dumped because: kasan: bad access detected [ 38.750242] [ 38.750454] Memory state around the buggy address: [ 38.751027] ffff8880164c8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.751892] ffff8880164c8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.752742] >ffff8880164c8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.753578] ^ [ 38.754344] ffff8880164c8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.755190] ffff8880164c8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.756041] ================================================================== [ 38.757075] Disabling lock debugging due to kernel taint [ 40.575700] BUG: Bad rss-counter state mm:00000000b11bd091 type:MM_FILEPAGES val:33 [ 40.576429] BUG: Bad rss-counter state mm:00000000b11bd091 type:MM_ANONPAGES val:22 [ 41.081620] BUG: Bad rss-counter state mm:00000000513aeea8 type:MM_FILEPAGES val:33 [ 41.082775] BUG: Bad rss-counter state mm:00000000513aeea8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29821' (ECDSA) to the list of known hosts. 2023/06/20 19:54:39 fuzzer started 2023/06/20 19:54:39 dialing manager at localhost:36067 2023/06/20 19:54:39 checking machine... 2023/06/20 19:54:39 checking revisions... [ 41.736522] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:54:39 testing simple program... [ 41.784765] cgroup: Unknown subsys name 'net' [ 41.824750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:54:39 Registers: info registers vcpu 0 RAX=ffffffff8387423d RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b60e36 RSI=ffffffff8387423d RDI=ffff888015b07220 RBP=ffff888015b071f0 RSP=ffff888015b07150 R8 =0000000000000001 R9 =ffff888015b07198 R10=0000000000038001 R11=000000000008de00 R12=ffff888015b07220 R13=0000000000000000 R14=ffff888015aab680 R15=0000000000092cc0 RIP=ffffffff84538440 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe9ac1c9900 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=00007fffe638f000 CR3=000000000f50e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fd7776832a0 CR3=00000000169c0000 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=34353a3931203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303432 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000