syzkaller login: [ 33.286928] BUG: Bad rss-counter state mm:00000000ccf24fe7 type:MM_FILEPAGES val:33 [ 33.288297] BUG: Bad rss-counter state mm:00000000ccf24fe7 type:MM_ANONPAGES val:22 [ 33.445165] ================================================================== [ 33.446077] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.447025] Read of size 8 at addr ffff88800f1b2798 by task sshd/221 [ 33.447802] [ 33.448023] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.449009] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.450016] Call Trace: [ 33.450343] [ 33.450627] dump_stack_lvl+0x91/0xf0 [ 33.451116] print_report+0xcc/0x620 [ 33.451607] ? __virt_addr_valid+0x102/0x340 [ 33.452160] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.452783] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.453408] kasan_report+0xbe/0xf0 [ 33.453916] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.454539] vma_interval_tree_remove+0xc75/0xec0 [ 33.455152] vma_prepare+0xc54/0x11a0 [ 33.455633] __split_vma+0x5af/0x950 [ 33.456104] ? __pfx___split_vma+0x10/0x10 [ 33.456629] ? find_held_lock+0x2c/0x110 [ 33.457154] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.457715] ? lock_is_held_type+0x9f/0x120 [ 33.458260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.458869] ? mtree_range_walk+0x632/0x900 [ 33.459416] ? mas_walk+0x5c7/0x7c0 [ 33.459887] do_vmi_munmap+0x1f1/0x2b0 [ 33.460377] mmap_region+0x1f9/0x2660 [ 33.460857] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.461375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.462104] ? __pfx_lock_acquire+0x10/0x10 [ 33.462631] ? __pfx_mmap_region+0x10/0x10 [ 33.463157] ? security_mmap_addr+0x7d/0xa0 [ 33.463684] ? get_unmapped_area+0x1f5/0x3f0 [ 33.464230] do_mmap+0x854/0xf00 [ 33.464667] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.465160] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.465730] ksys_mmap_pgoff+0x3af/0x500 [ 33.466244] do_syscall_64+0x3f/0x90 [ 33.466721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.467363] RIP: 0033:0x7f7155da6d82 [ 33.467817] 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 [ 33.469942] RSP: 002b:00007ffcecd88e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.470856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7155da6d82 [ 33.471697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71551e0000 [ 33.472545] RBP: 00007f71551e0000 R08: 0000000000000009 R09: 0000000000001000 [ 33.473394] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea2d3d8980 [ 33.474263] R13: 00007ffcecd88ea0 R14: 00007ffcecd88ed0 R15: 00007ffcecd89230 [ 33.475124] [ 33.475415] [ 33.475630] Allocated by task 214: [ 33.476060] kasan_save_stack+0x22/0x50 [ 33.476562] kasan_set_track+0x25/0x30 [ 33.477056] __kasan_slab_alloc+0x59/0x70 [ 33.477576] kmem_cache_alloc+0x16b/0x370 [ 33.478101] vm_area_dup+0x20/0x160 [ 33.478556] __split_vma+0x170/0x950 [ 33.479022] split_vma+0xc6/0x110 [ 33.479458] mprotect_fixup+0x8d2/0xb30 [ 33.479957] do_mprotect_pkey+0x87e/0xd40 [ 33.480477] __x64_sys_mprotect+0x78/0xc0 [ 33.480998] do_syscall_64+0x3f/0x90 [ 33.481471] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.482129] [ 33.482342] Freed by task 19: [ 33.482725] kasan_save_stack+0x22/0x50 [ 33.483230] kasan_set_track+0x25/0x30 [ 33.483724] kasan_save_free_info+0x2b/0x50 [ 33.484255] __kasan_slab_free+0x10a/0x190 [ 33.484786] kmem_cache_free+0x10d/0x4d0 [ 33.485301] rcu_core+0x8c8/0x2860 [ 33.485762] __do_softirq+0x1b7/0x7d4 [ 33.486243] [ 33.486457] Last potentially related work creation: [ 33.487037] kasan_save_stack+0x22/0x50 [ 33.487540] __kasan_record_aux_stack+0x8e/0xa0 [ 33.488111] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.488753] remove_vma+0x139/0x170 [ 33.489203] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.489765] do_vmi_munmap+0x1f1/0x2b0 [ 33.490253] __vm_munmap+0x138/0x3a0 [ 33.490719] __x64_sys_munmap+0x59/0x80 [ 33.491212] do_syscall_64+0x3f/0x90 [ 33.491686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.492324] [ 33.492538] The buggy address belongs to the object at ffff88800f1b2740 [ 33.492538] which belongs to the cache vm_area_struct of size 168 [ 33.494027] The buggy address is located 88 bytes inside of [ 33.494027] freed 168-byte region [ffff88800f1b2740, ffff88800f1b27e8) [ 33.495416] [ 33.495641] The buggy address belongs to the physical page: [ 33.496315] page:00000000e18755aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1b2 [ 33.497410] memcg:ffff888009a25701 [ 33.497852] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.498502] page_type: 0xffffffff() [ 33.498954] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.499869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a25701 [ 33.500777] page dumped because: kasan: bad access detected [ 33.501451] [ 33.501666] Memory state around the buggy address: [ 33.502251] ffff88800f1b2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.503105] ffff88800f1b2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.503958] >ffff88800f1b2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.504807] ^ [ 33.505296] ffff88800f1b2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.506155] ffff88800f1b2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.507002] ================================================================== [ 33.508077] Disabling lock debugging due to kernel taint [ 36.232690] BUG: Bad rss-counter state mm:00000000162e6dd7 type:MM_FILEPAGES val:33 [ 36.234126] BUG: Bad rss-counter state mm:00000000162e6dd7 type:MM_ANONPAGES val:22 [ 36.744619] BUG: Bad rss-counter state mm:000000001c094af4 type:MM_FILEPAGES val:33 [ 36.745849] BUG: Bad rss-counter state mm:000000001c094af4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14991' (ECDSA) to the list of known hosts. 2023/06/19 18:21:37 fuzzer started 2023/06/19 18:21:37 dialing manager at localhost:44161 2023/06/19 18:21:37 checking machine... 2023/06/19 18:21:37 checking revisions... [ 37.492381] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:21:37 testing simple program... [ 37.519654] cgroup: Unknown subsys name 'net' [ 37.545676] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:21:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f2ca6d65000 CR3=000000000967c000 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=2036333a31323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a31323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9e13a4 RSP=ffff88806cf09d10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff88806cf361a0 R13=ffffffff81830685 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d86e0 RFL=00000046 [---Z-P-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3c55200900 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=000055cf63ad83b0 CR3=000000001a220000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000