syzkaller login: [ 30.955610] BUG: Bad rss-counter state mm:0000000093edfe44 type:MM_FILEPAGES val:33 [ 30.956650] BUG: Bad rss-counter state mm:0000000093edfe44 type:MM_ANONPAGES val:22 [ 31.061950] ================================================================== [ 31.062768] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.063616] Read of size 8 at addr ffff88800dbe3df0 by task sshd/221 [ 31.064325] [ 31.064523] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.065317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.066299] Call Trace: [ 31.066588] [ 31.066836] dump_stack_lvl+0x91/0xf0 [ 31.067281] print_report+0xcc/0x620 [ 31.067716] ? __virt_addr_valid+0x102/0x340 [ 31.068212] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.068762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069315] kasan_report+0xbe/0xf0 [ 31.069735] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.070307] vma_interval_tree_remove+0xc75/0xec0 [ 31.070841] vma_prepare+0xc54/0x11a0 [ 31.071256] __split_vma+0x5af/0x950 [ 31.071663] ? __pfx___split_vma+0x10/0x10 [ 31.072113] ? find_held_lock+0x2c/0x110 [ 31.072561] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.073038] ? lock_is_held_type+0x9f/0x120 [ 31.073501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.074026] ? mtree_range_walk+0x632/0x900 [ 31.074506] ? mas_walk+0x5c7/0x7c0 [ 31.074857] do_vmi_munmap+0x1f1/0x2b0 [ 31.075215] mmap_region+0x1f9/0x2660 [ 31.075561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.075936] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.076455] ? __pfx_lock_acquire+0x10/0x10 [ 31.076847] ? __pfx_mmap_region+0x10/0x10 [ 31.077234] ? security_mmap_addr+0x7d/0xa0 [ 31.077620] ? get_unmapped_area+0x1f5/0x3f0 [ 31.078020] do_mmap+0x854/0xf00 [ 31.078348] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.078706] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.079115] ksys_mmap_pgoff+0x3af/0x500 [ 31.079484] do_syscall_64+0x3f/0x90 [ 31.079839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080315] RIP: 0033:0x7f1da1aeed82 [ 31.080648] 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 [ 31.082206] RSP: 002b:00007fff773a2f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.082863] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1da1aeed82 [ 31.083476] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1da0f28000 [ 31.084087] RBP: 00007f1da0f28000 R08: 0000000000000009 R09: 0000000000001000 [ 31.084705] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632f6b8fec0 [ 31.085320] R13: 00007fff773a2f50 R14: 00007fff773a2f80 R15: 00007fff773a32e0 [ 31.085943] [ 31.086161] [ 31.086316] Allocated by task 214: [ 31.086627] kasan_save_stack+0x22/0x50 [ 31.086995] kasan_set_track+0x25/0x30 [ 31.087355] __kasan_slab_alloc+0x59/0x70 [ 31.087736] kmem_cache_alloc+0x16b/0x370 [ 31.088111] vm_area_dup+0x20/0x160 [ 31.088440] __split_vma+0x170/0x950 [ 31.088777] split_vma+0xc6/0x110 [ 31.089092] mprotect_fixup+0x8d2/0xb30 [ 31.089458] do_mprotect_pkey+0x87e/0xd40 [ 31.089839] __x64_sys_mprotect+0x78/0xc0 [ 31.090224] do_syscall_64+0x3f/0x90 [ 31.090567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091030] [ 31.091186] Freed by task 214: [ 31.091467] kasan_save_stack+0x22/0x50 [ 31.091835] kasan_set_track+0x25/0x30 [ 31.092193] kasan_save_free_info+0x2b/0x50 [ 31.092578] __kasan_slab_free+0x10a/0x190 [ 31.092965] kmem_cache_free+0x10d/0x4d0 [ 31.093336] rcu_core+0x8c8/0x2860 [ 31.093656] __do_softirq+0x1b7/0x7d4 [ 31.094013] [ 31.094180] Last potentially related work creation: [ 31.094608] kasan_save_stack+0x22/0x50 [ 31.094973] __kasan_record_aux_stack+0x8e/0xa0 [ 31.095392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.095855] remove_vma+0x139/0x170 [ 31.096182] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.096587] do_vmi_munmap+0x1f1/0x2b0 [ 31.096943] __vm_munmap+0x138/0x3a0 [ 31.097282] __x64_sys_munmap+0x59/0x80 [ 31.097644] do_syscall_64+0x3f/0x90 [ 31.097985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.098463] [ 31.098619] The buggy address belongs to the object at ffff88800dbe3d98 [ 31.098619] which belongs to the cache vm_area_struct of size 168 [ 31.099692] The buggy address is located 88 bytes inside of [ 31.099692] freed 168-byte region [ffff88800dbe3d98, ffff88800dbe3e40) [ 31.100716] [ 31.100873] The buggy address belongs to the physical page: [ 31.101355] page:0000000047467530 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbe3 [ 31.102161] memcg:ffff88800dc06001 [ 31.102474] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.102982] page_type: 0xffffffff() [ 31.103309] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384280 dead000000000005 [ 31.103975] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc06001 [ 31.104633] page dumped because: kasan: bad access detected [ 31.105113] [ 31.105271] Memory state around the buggy address: [ 31.105696] ffff88800dbe3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.106331] ffff88800dbe3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.106952] >ffff88800dbe3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.107571] ^ [ 31.108166] ffff88800dbe3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.108794] ffff88800dbe3e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.109412] ================================================================== [ 31.110124] Disabling lock debugging due to kernel taint [ 32.831704] BUG: Bad rss-counter state mm:0000000037377ae2 type:MM_FILEPAGES val:33 [ 32.832971] BUG: Bad rss-counter state mm:0000000037377ae2 type:MM_ANONPAGES val:22 [ 33.305441] BUG: Bad rss-counter state mm:00000000f1485dc4 type:MM_FILEPAGES val:33 [ 33.306396] BUG: Bad rss-counter state mm:00000000f1485dc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41799' (ECDSA) to the list of known hosts. 2023/06/20 12:49:58 fuzzer started 2023/06/20 12:49:58 dialing manager at localhost:36067 2023/06/20 12:49:58 checking machine... 2023/06/20 12:49:58 checking revisions... [ 33.999435] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:49:58 testing simple program... [ 34.053382] cgroup: Unknown subsys name 'net' [ 34.090939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:49:58 Registers: info registers vcpu 0 RAX=ffff88800da2b8d0 RBX=ffff88806ce09ee8 RCX=1ffff11001b4571a RDX=ffff88800de84a00 RSI=0000000000000008 RDI=ffff88806ce09ef8 RBP=000000000000001c RSP=ffff88806ce09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffffffff8542a6c0 R15=ffff88800e0c68d0 RIP=ffffffff8137fcd9 RFL=00000246 [---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 =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=00007ffee6616478 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=00007f97abd115100000563694dbd790 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=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100338ef8a RSI=ffffffff81f31a70 RDI=ffff888019c77c50 RBP=0000000000000000 RSP=ffff888019c77a60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888019c77c50 R13=dffffc0000000000 R14=ffff8880090b6008 R15=dffffc0000000000 RIP=ffffffff814c0864 RFL=00000246 [---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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fea33d19900 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=00007fea342d10b0 CR3=000000000b9f2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000