syzkaller login: [ 37.479890] BUG: Bad rss-counter state mm:00000000560602a5 type:MM_FILEPAGES val:33 [ 37.482487] BUG: Bad rss-counter state mm:00000000560602a5 type:MM_ANONPAGES val:22 [ 37.658980] ================================================================== [ 37.660138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.661438] Read of size 8 at addr ffff88800f15d058 by task sshd/219 [ 37.662270] [ 37.662503] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.663424] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.664459] Call Trace: [ 37.664797] [ 37.665110] dump_stack_lvl+0x91/0xf0 [ 37.665635] print_report+0xcc/0x620 [ 37.666164] ? __virt_addr_valid+0x102/0x340 [ 37.666775] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.667458] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.668135] kasan_report+0xbe/0xf0 [ 37.668662] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.669338] vma_interval_tree_remove+0xc75/0xec0 [ 37.669982] vma_prepare+0xc54/0x11a0 [ 37.670500] __split_vma+0x5af/0x950 [ 37.671008] ? __pfx___split_vma+0x10/0x10 [ 37.671586] ? find_held_lock+0x2c/0x110 [ 37.672148] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.672762] ? lock_is_held_type+0x9f/0x120 [ 37.673364] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.674014] ? mtree_range_walk+0x632/0x900 [ 37.674602] ? mas_walk+0x5c7/0x7c0 [ 37.675114] do_vmi_munmap+0x1f1/0x2b0 [ 37.675652] mmap_region+0x1f9/0x2660 [ 37.676172] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.676737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.677507] ? __pfx_lock_acquire+0x10/0x10 [ 37.678085] ? __pfx_mmap_region+0x10/0x10 [ 37.678655] ? security_mmap_addr+0x7d/0xa0 [ 37.679218] ? get_unmapped_area+0x1f5/0x3f0 [ 37.679806] do_mmap+0x854/0xf00 [ 37.680267] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.680798] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.681414] ksys_mmap_pgoff+0x3af/0x500 [ 37.682079] do_syscall_64+0x3f/0x90 [ 37.682600] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.683298] RIP: 0033:0x7fe45ac14d82 [ 37.683795] 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 [ 37.686099] RSP: 002b:00007ffd99267168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.687099] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe45ac14d82 [ 37.688028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe45a04e000 [ 37.688958] RBP: 00007fe45a04e000 R08: 0000000000000009 R09: 0000000000001000 [ 37.689886] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad838e1d90 [ 37.690796] R13: 00007ffd99267180 R14: 00007ffd992671b0 R15: 00007ffd99267510 [ 37.691728] [ 37.692045] [ 37.692276] Allocated by task 212: [ 37.692746] kasan_save_stack+0x22/0x50 [ 37.693321] kasan_set_track+0x25/0x30 [ 37.693867] __kasan_slab_alloc+0x59/0x70 [ 37.694436] kmem_cache_alloc+0x16b/0x370 [ 37.695001] vm_area_dup+0x20/0x160 [ 37.695495] __split_vma+0x170/0x950 [ 37.696012] split_vma+0xc6/0x110 [ 37.696509] mprotect_fixup+0x8d2/0xb30 [ 37.697109] do_mprotect_pkey+0x87e/0xd40 [ 37.697696] __x64_sys_mprotect+0x78/0xc0 [ 37.698263] do_syscall_64+0x3f/0x90 [ 37.698787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.699502] [ 37.699743] Freed by task 13: [ 37.700169] kasan_save_stack+0x22/0x50 [ 37.700731] kasan_set_track+0x25/0x30 [ 37.701306] kasan_save_free_info+0x2b/0x50 [ 37.701905] __kasan_slab_free+0x10a/0x190 [ 37.702498] kmem_cache_free+0x10d/0x4d0 [ 37.703073] rcu_core+0x8c8/0x2860 [ 37.703572] __do_softirq+0x1b7/0x7d4 [ 37.704109] [ 37.704353] Last potentially related work creation: [ 37.705019] kasan_save_stack+0x22/0x50 [ 37.705580] __kasan_record_aux_stack+0x8e/0xa0 [ 37.706226] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.706961] remove_vma+0x139/0x170 [ 37.707486] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.708130] do_vmi_munmap+0x1f1/0x2b0 [ 37.708696] __vm_munmap+0x138/0x3a0 [ 37.709255] __x64_sys_munmap+0x59/0x80 [ 37.709828] do_syscall_64+0x3f/0x90 [ 37.710388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.711137] [ 37.711387] The buggy address belongs to the object at ffff88800f15d000 [ 37.711387] which belongs to the cache vm_area_struct of size 168 [ 37.713120] The buggy address is located 88 bytes inside of [ 37.713120] freed 168-byte region [ffff88800f15d000, ffff88800f15d0a8) [ 37.714767] [ 37.715019] The buggy address belongs to the physical page: [ 37.715791] page:000000009aa9a40f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf15d [ 37.717068] memcg:ffff888015a5e201 [ 37.717568] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.718321] page_type: 0xffffffff() [ 37.718848] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.719926] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015a5e201 [ 37.720985] page dumped because: kasan: bad access detected [ 37.721745] [ 37.721992] Memory state around the buggy address: [ 37.722665] ffff88800f15cf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 37.723666] ffff88800f15cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.724647] >ffff88800f15d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.725643] ^ [ 37.726478] ffff88800f15d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 37.727469] ffff88800f15d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.728447] ================================================================== [ 37.729713] Disabling lock debugging due to kernel taint [ 39.506906] BUG: Bad rss-counter state mm:00000000ec14fcef type:MM_FILEPAGES val:33 [ 39.508141] BUG: Bad rss-counter state mm:00000000ec14fcef type:MM_ANONPAGES val:22 [ 39.901727] BUG: Bad rss-counter state mm:00000000d1a176e2 type:MM_FILEPAGES val:33 [ 39.902756] BUG: Bad rss-counter state mm:00000000d1a176e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58665' (ECDSA) to the list of known hosts. 2023/06/20 06:06:20 fuzzer started 2023/06/20 06:06:20 dialing manager at localhost:44161 2023/06/20 06:06:20 checking machine... 2023/06/20 06:06:20 checking revisions... [ 40.666170] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:06:20 testing simple program... [ 40.720443] cgroup: Unknown subsys name 'net' [ 40.776004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:06:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88801645b680 RSI=ffffffff8113cfd8 RDI=0000000000000006 RBP=ffff8880141fff58 RSP=ffff8880141fff28 R8 =0000000000000006 R9 =00007fa586c1fb30 R10=00007ffffffff000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007fa586c1fb30 R15=0000000000000000 RIP=ffffffff8450b626 RFL=00000093 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa5877c2900 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=00007fa586c1fb30 CR3=000000000c622000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2446a1353a68429b00000000000ae988 XMM05=01c1c00fc6393eb90000000000134dc0 XMM06=dfcdbad4f1609c3700000000001338e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000078 RBX=ffff88801cc5bc48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801cc5bc80 RBP=ffff88800ef510b8 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800ef510b8 R14=ffffffff813782a8 R15=ffff88800ef510b8 RIP=ffffffff8184638b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f20c2e47900 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=00007f20c33fe618 CR3=000000000e270000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000