syzkaller login: [ 38.744316] BUG: Bad rss-counter state mm:00000000e3bf2e46 type:MM_FILEPAGES val:33 [ 38.745294] BUG: Bad rss-counter state mm:00000000e3bf2e46 type:MM_ANONPAGES val:22 [ 38.921457] ================================================================== [ 38.922791] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.924255] Read of size 8 at addr ffff88800f756228 by task sshd/220 [ 38.925263] [ 38.925549] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.926700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.927996] Call Trace: [ 38.928426] [ 38.928801] dump_stack_lvl+0x91/0xf0 [ 38.929433] print_report+0xcc/0x620 [ 38.930061] ? __virt_addr_valid+0x102/0x340 [ 38.930770] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931570] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932398] kasan_report+0xbe/0xf0 [ 38.933016] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.933819] vma_interval_tree_remove+0xc75/0xec0 [ 38.934604] vma_prepare+0xc54/0x11a0 [ 38.935225] __split_vma+0x5af/0x950 [ 38.935839] ? __pfx___split_vma+0x10/0x10 [ 38.936530] ? find_held_lock+0x2c/0x110 [ 38.937197] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.937925] ? lock_is_held_type+0x9f/0x120 [ 38.938623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.939404] ? mtree_range_walk+0x632/0x900 [ 38.940119] ? mas_walk+0x5c7/0x7c0 [ 38.940728] do_vmi_munmap+0x1f1/0x2b0 [ 38.941364] mmap_region+0x1f9/0x2660 [ 38.941987] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.942648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.943583] ? __pfx_lock_acquire+0x10/0x10 [ 38.944295] ? __pfx_mmap_region+0x10/0x10 [ 38.944976] ? security_mmap_addr+0x7d/0xa0 [ 38.945661] ? get_unmapped_area+0x1f5/0x3f0 [ 38.946361] do_mmap+0x854/0xf00 [ 38.946929] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.947560] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.948294] ksys_mmap_pgoff+0x3af/0x500 [ 38.948948] do_syscall_64+0x3f/0x90 [ 38.949562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.950403] RIP: 0033:0x7f3e11b70d82 [ 38.951002] 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 [ 38.953803] RSP: 002b:00007ffcdf1c6af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.954991] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e11b70d82 [ 38.956095] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e10faa000 [ 38.957205] RBP: 00007f3e10faa000 R08: 0000000000000009 R09: 0000000000001000 [ 38.958297] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560171833f70 [ 38.959408] R13: 00007ffcdf1c6b10 R14: 00007ffcdf1c6b40 R15: 00007ffcdf1c6ea0 [ 38.960550] [ 38.960924] [ 38.961200] Allocated by task 213: [ 38.961761] kasan_save_stack+0x22/0x50 [ 38.962410] kasan_set_track+0x25/0x30 [ 38.963046] __kasan_slab_alloc+0x59/0x70 [ 38.963730] kmem_cache_alloc+0x16b/0x370 [ 38.964407] vm_area_dup+0x20/0x160 [ 38.964994] __split_vma+0x170/0x950 [ 38.965602] split_vma+0xc6/0x110 [ 38.966163] mprotect_fixup+0x8d2/0xb30 [ 38.966807] do_mprotect_pkey+0x87e/0xd40 [ 38.967475] __x64_sys_mprotect+0x78/0xc0 [ 38.968166] do_syscall_64+0x3f/0x90 [ 38.968773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969603] [ 38.969889] Freed by task 19: [ 38.970385] kasan_save_stack+0x22/0x50 [ 38.971034] kasan_set_track+0x25/0x30 [ 38.971665] kasan_save_free_info+0x2b/0x50 [ 38.972369] __kasan_slab_free+0x10a/0x190 [ 38.973053] kmem_cache_free+0x10d/0x4d0 [ 38.973711] rcu_core+0x8c8/0x2860 [ 38.974292] __do_softirq+0x1b7/0x7d4 [ 38.974902] [ 38.975180] Last potentially related work creation: [ 38.975947] kasan_save_stack+0x22/0x50 [ 38.976545] __kasan_record_aux_stack+0x8e/0xa0 [ 38.977167] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.977868] remove_vma+0x139/0x170 [ 38.978356] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.978964] do_vmi_munmap+0x1f1/0x2b0 [ 38.979491] __vm_munmap+0x138/0x3a0 [ 38.979992] __x64_sys_munmap+0x59/0x80 [ 38.980543] do_syscall_64+0x3f/0x90 [ 38.981054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.981762] [ 38.981994] The buggy address belongs to the object at ffff88800f7561d0 [ 38.981994] which belongs to the cache vm_area_struct of size 168 [ 38.983569] The buggy address is located 88 bytes inside of [ 38.983569] freed 168-byte region [ffff88800f7561d0, ffff88800f756278) [ 38.985084] [ 38.985315] The buggy address belongs to the physical page: [ 38.986020] page:00000000ee5652e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf756 [ 38.987192] memcg:ffff888015971c01 [ 38.987649] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.988345] page_type: 0xffffffff() [ 38.988849] raw: 0100000000000200 ffff88800879fc80 ffffea00005be140 dead000000000006 [ 38.989874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015971c01 [ 38.990883] page dumped because: kasan: bad access detected [ 38.991617] [ 38.991856] Memory state around the buggy address: [ 38.992529] ffff88800f756100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.993482] ffff88800f756180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.994432] >ffff88800f756200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.995378] ^ [ 38.995994] ffff88800f756280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.996926] ffff88800f756300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.997835] ================================================================== [ 38.998992] Disabling lock debugging due to kernel taint [ 41.178048] BUG: Bad rss-counter state mm:0000000078532e79 type:MM_FILEPAGES val:33 [ 41.179444] BUG: Bad rss-counter state mm:0000000078532e79 type:MM_ANONPAGES val:22 [ 41.672645] BUG: Bad rss-counter state mm:000000004fa19abe type:MM_FILEPAGES val:33 [ 41.674295] BUG: Bad rss-counter state mm:000000004fa19abe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39705' (ECDSA) to the list of known hosts. 2023/06/19 11:37:07 fuzzer started 2023/06/19 11:37:07 dialing manager at localhost:44161 2023/06/19 11:37:07 checking machine... 2023/06/19 11:37:07 checking revisions... [ 42.417724] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:37:08 testing simple program... [ 42.466862] cgroup: Unknown subsys name 'net' [ 42.591176] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:36:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fc1aca9ad77 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007fc1aca9ad77 RSP=ffff88800fbf7a40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=dffffc0000000000 RIP=ffffffff814c851c 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 00007fc1ac5b3900 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=00007fc1acb68650 CR3=00000000103a0000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff8609f901 RDX=ffff888008e57ed8 RSI=0000000000000000 RDI=ffff888008e57988 RBP=ffff888008e57a10 RSP=ffff888008e57968 R8 =ffffffff8609f9be R9 =ffff888008e579b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e57a40 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff888008e57978 RIP=ffffffff81130937 RFL=00000292 [--S-A--] 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 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=00007ffd90746368 CR3=000000000f9a6000 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=37333a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303839 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000