syzkaller login: [ 38.885227] BUG: Bad rss-counter state mm:00000000227ca545 type:MM_FILEPAGES val:33 [ 38.886236] BUG: Bad rss-counter state mm:00000000227ca545 type:MM_ANONPAGES val:22 [ 39.053416] ================================================================== [ 39.054510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.055570] Read of size 8 at addr ffff888019f7f880 by task sshd/220 [ 39.056430] [ 39.056650] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.057518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.058550] Call Trace: [ 39.058868] [ 39.059150] dump_stack_lvl+0x91/0xf0 [ 39.059639] print_report+0xcc/0x620 [ 39.060128] ? __virt_addr_valid+0x102/0x340 [ 39.060673] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.061296] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.061906] kasan_report+0xbe/0xf0 [ 39.062392] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.063015] vma_interval_tree_remove+0xc75/0xec0 [ 39.063627] vma_prepare+0xc54/0x11a0 [ 39.064110] __split_vma+0x5af/0x950 [ 39.064588] ? __pfx___split_vma+0x10/0x10 [ 39.065119] ? find_held_lock+0x2c/0x110 [ 39.065636] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.066232] ? lock_is_held_type+0x9f/0x120 [ 39.066779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.067389] ? mtree_range_walk+0x632/0x900 [ 39.067936] ? mas_walk+0x5c7/0x7c0 [ 39.068408] do_vmi_munmap+0x1f1/0x2b0 [ 39.068911] mmap_region+0x1f9/0x2660 [ 39.069395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.069905] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.070615] ? __pfx_lock_acquire+0x10/0x10 [ 39.071145] ? __pfx_mmap_region+0x10/0x10 [ 39.071676] ? security_mmap_addr+0x7d/0xa0 [ 39.072203] ? get_unmapped_area+0x1f5/0x3f0 [ 39.072746] do_mmap+0x854/0xf00 [ 39.073180] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.073678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.074259] ksys_mmap_pgoff+0x3af/0x500 [ 39.074766] do_syscall_64+0x3f/0x90 [ 39.075236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.075874] RIP: 0033:0x7f0b71175d82 [ 39.076326] 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 [ 39.078448] RSP: 002b:00007ffff8592de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.079370] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b71175d82 [ 39.080433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b705af000 [ 39.081511] RBP: 00007f0b705af000 R08: 0000000000000009 R09: 0000000000001000 [ 39.082584] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b678111ec0 [ 39.083449] R13: 00007ffff8592e00 R14: 00007ffff8592e30 R15: 00007ffff8593190 [ 39.084307] [ 39.084642] [ 39.084860] Allocated by task 213: [ 39.085302] kasan_save_stack+0x22/0x50 [ 39.085822] kasan_set_track+0x25/0x30 [ 39.086355] __kasan_slab_alloc+0x59/0x70 [ 39.086911] kmem_cache_alloc+0x16b/0x370 [ 39.087429] vm_area_dup+0x20/0x160 [ 39.087888] __split_vma+0x170/0x950 [ 39.088355] split_vma+0xc6/0x110 [ 39.088792] mprotect_fixup+0x8d2/0xb30 [ 39.089294] do_mprotect_pkey+0x87e/0xd40 [ 39.089814] __x64_sys_mprotect+0x78/0xc0 [ 39.090348] do_syscall_64+0x3f/0x90 [ 39.090822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.091462] [ 39.091678] Freed by task 210: [ 39.092068] kasan_save_stack+0x22/0x50 [ 39.092568] kasan_set_track+0x25/0x30 [ 39.093061] kasan_save_free_info+0x2b/0x50 [ 39.093593] __kasan_slab_free+0x10a/0x190 [ 39.094125] kmem_cache_free+0x10d/0x4d0 [ 39.094655] rcu_core+0x8c8/0x2860 [ 39.095100] __do_softirq+0x1b7/0x7d4 [ 39.095580] [ 39.095795] Last potentially related work creation: [ 39.096371] kasan_save_stack+0x22/0x50 [ 39.096876] __kasan_record_aux_stack+0x8e/0xa0 [ 39.097449] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.098094] remove_vma+0x139/0x170 [ 39.098572] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.099138] do_vmi_munmap+0x1f1/0x2b0 [ 39.099619] __vm_munmap+0x138/0x3a0 [ 39.100097] __x64_sys_munmap+0x59/0x80 [ 39.100599] do_syscall_64+0x3f/0x90 [ 39.101077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.101760] [ 39.101983] The buggy address belongs to the object at ffff888019f7f828 [ 39.101983] which belongs to the cache vm_area_struct of size 168 [ 39.103486] The buggy address is located 88 bytes inside of [ 39.103486] freed 168-byte region [ffff888019f7f828, ffff888019f7f8d0) [ 39.104918] [ 39.105133] The buggy address belongs to the physical page: [ 39.105850] page:00000000d562507b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7f [ 39.106993] memcg:ffff888019fcee01 [ 39.107440] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.108085] page_type: 0xffffffff() [ 39.108553] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.109508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fcee01 [ 39.110444] page dumped because: kasan: bad access detected [ 39.111101] [ 39.111318] Memory state around the buggy address: [ 39.111898] ffff888019f7f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.112753] ffff888019f7f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.113604] >ffff888019f7f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.114465] ^ [ 39.114872] ffff888019f7f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.115722] ffff888019f7f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.116562] ================================================================== [ 39.117520] Disabling lock debugging due to kernel taint [ 41.501421] BUG: Bad rss-counter state mm:00000000110f5e9b type:MM_FILEPAGES val:33 [ 41.502654] BUG: Bad rss-counter state mm:00000000110f5e9b type:MM_ANONPAGES val:22 [ 41.981350] BUG: Bad rss-counter state mm:00000000dfe50724 type:MM_FILEPAGES val:33 [ 41.982403] BUG: Bad rss-counter state mm:00000000dfe50724 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16686' (ECDSA) to the list of known hosts. 2023/06/19 14:12:44 fuzzer started 2023/06/19 14:12:44 dialing manager at localhost:44161 2023/06/19 14:12:44 checking machine... 2023/06/19 14:12:44 checking revisions... [ 42.697070] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:12:44 testing simple program... [ 42.734681] cgroup: Unknown subsys name 'net' [ 42.788797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:12:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d869a RDX=ffffffff8542a6c0 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c132e RSP=ffff88806ce09958 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b5420 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800c5692e0 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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=00007fb6e993d020 CR3=000000000c5f6000 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=2d2a4c4776984dbd5f4cae928a869282 XMM02=eff9b2d0a8fce9cb000000000011fab0 XMM03=2c67c8bc2e329bc3000000000011fbd8 XMM04=499fec4703d1d68300000000000ae988 XMM05=09c161d785cdf7120000000000134ee8 XMM06=4fda316b135da52b0000000000133cd8 XMM07=fb795ef6d657705600000000001242a0 XMM08=2c67c8bc2e329bc3000000000011fbd8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801ce27970 RCX=ffffffff86137501 RDX=0000000000000000 RSI=ffffffff8180c585 RDI=ffff88801ce2797c RBP=0000000000000001 RSP=ffff88801ce27888 R8 =ffffffff8613751e R9 =ffff88801ce278e8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801ce27970 R13=0000000000000000 R14=ffff88800eff1b40 R15=0000000000092cc0 RIP=ffffffff813ad49e 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 00007f966280a900 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=00007f9662dbf650 CR3=000000000c9f4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000