syzkaller login: [ 50.486420] BUG: Bad rss-counter state mm:00000000ed7f3c78 type:MM_FILEPAGES val:33 [ 50.487482] BUG: Bad rss-counter state mm:00000000ed7f3c78 type:MM_ANONPAGES val:22 [ 50.660144] ================================================================== [ 50.661071] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.661999] Read of size 8 at addr ffff88800df73228 by task sshd/220 [ 50.662850] [ 50.663069] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.663954] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.664940] Call Trace: [ 50.665262] [ 50.665552] dump_stack_lvl+0x91/0xf0 [ 50.666043] print_report+0xcc/0x620 [ 50.666552] ? __virt_addr_valid+0x102/0x340 [ 50.667099] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.667713] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.668328] kasan_report+0xbe/0xf0 [ 50.668800] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.669409] vma_interval_tree_remove+0xc75/0xec0 [ 50.670022] vma_prepare+0xc54/0x11a0 [ 50.670518] __split_vma+0x5af/0x950 [ 50.670993] ? __pfx___split_vma+0x10/0x10 [ 50.671524] ? find_held_lock+0x2c/0x110 [ 50.672047] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.672622] ? lock_is_held_type+0x9f/0x120 [ 50.673163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.673777] ? mtree_range_walk+0x632/0x900 [ 50.674344] ? mas_walk+0x5c7/0x7c0 [ 50.674824] do_vmi_munmap+0x1f1/0x2b0 [ 50.675312] mmap_region+0x1f9/0x2660 [ 50.675798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.676308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.677033] ? __pfx_lock_acquire+0x10/0x10 [ 50.677564] ? __pfx_mmap_region+0x10/0x10 [ 50.678119] ? security_mmap_addr+0x7d/0xa0 [ 50.678647] ? get_unmapped_area+0x1f5/0x3f0 [ 50.679214] do_mmap+0x854/0xf00 [ 50.679662] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.680157] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.680720] ksys_mmap_pgoff+0x3af/0x500 [ 50.681224] do_syscall_64+0x3f/0x90 [ 50.681707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.682355] RIP: 0033:0x7f76d1338d82 [ 50.682813] 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 [ 50.684923] RSP: 002b:00007fff8fb8f908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.685837] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76d1338d82 [ 50.686686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76d0772000 [ 50.687528] RBP: 00007f76d0772000 R08: 0000000000000009 R09: 0000000000001000 [ 50.688374] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563067b55d90 [ 50.689216] R13: 00007fff8fb8f920 R14: 00007fff8fb8f950 R15: 00007fff8fb8fcb0 [ 50.690072] [ 50.690386] [ 50.690602] Allocated by task 213: [ 50.691031] kasan_save_stack+0x22/0x50 [ 50.691535] kasan_set_track+0x25/0x30 [ 50.692027] __kasan_slab_alloc+0x59/0x70 [ 50.692548] kmem_cache_alloc+0x16b/0x370 [ 50.693059] vm_area_dup+0x20/0x160 [ 50.693510] __split_vma+0x170/0x950 [ 50.693982] split_vma+0xc6/0x110 [ 50.694432] mprotect_fixup+0x8d2/0xb30 [ 50.694930] do_mprotect_pkey+0x87e/0xd40 [ 50.695457] __x64_sys_mprotect+0x78/0xc0 [ 50.695980] do_syscall_64+0x3f/0x90 [ 50.696458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.697111] [ 50.697329] Freed by task 19: [ 50.697711] kasan_save_stack+0x22/0x50 [ 50.698232] kasan_set_track+0x25/0x30 [ 50.698735] kasan_save_free_info+0x2b/0x50 [ 50.699268] __kasan_slab_free+0x10a/0x190 [ 50.699800] kmem_cache_free+0x10d/0x4d0 [ 50.700317] rcu_core+0x8c8/0x2860 [ 50.700765] __do_softirq+0x1b7/0x7d4 [ 50.701243] [ 50.701461] Last potentially related work creation: [ 50.702050] kasan_save_stack+0x22/0x50 [ 50.702559] __kasan_record_aux_stack+0x8e/0xa0 [ 50.703144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.703799] remove_vma+0x139/0x170 [ 50.704258] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.704818] do_vmi_munmap+0x1f1/0x2b0 [ 50.705303] __vm_munmap+0x138/0x3a0 [ 50.705775] __x64_sys_munmap+0x59/0x80 [ 50.706281] do_syscall_64+0x3f/0x90 [ 50.706751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.707396] [ 50.707610] The buggy address belongs to the object at ffff88800df731d0 [ 50.707610] which belongs to the cache vm_area_struct of size 168 [ 50.709083] The buggy address is located 88 bytes inside of [ 50.709083] freed 168-byte region [ffff88800df731d0, ffff88800df73278) [ 50.710516] [ 50.710736] The buggy address belongs to the physical page: [ 50.711388] page:00000000a71565c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf73 [ 50.712485] memcg:ffff88801696a401 [ 50.712916] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.713556] page_type: 0xffffffff() [ 50.714009] raw: 0100000000000200 ffff88800879fc80 ffffea00005a5a40 0000000000000008 [ 50.714931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801696a401 [ 50.715842] page dumped because: kasan: bad access detected [ 50.716498] [ 50.716715] Memory state around the buggy address: [ 50.717295] ffff88800df73100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.718172] ffff88800df73180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 50.719033] >ffff88800df73200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 50.719883] ^ [ 50.720438] ffff88800df73280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 50.721296] ffff88800df73300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 50.722218] ================================================================== [ 50.723241] Disabling lock debugging due to kernel taint [ 52.626727] BUG: Bad rss-counter state mm:000000006724c7e7 type:MM_FILEPAGES val:33 [ 52.627879] BUG: Bad rss-counter state mm:000000006724c7e7 type:MM_ANONPAGES val:22 [ 53.070292] BUG: Bad rss-counter state mm:00000000424b8024 type:MM_FILEPAGES val:33 [ 53.071313] BUG: Bad rss-counter state mm:00000000424b8024 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8794' (ECDSA) to the list of known hosts. 2023/06/20 05:30:08 fuzzer started 2023/06/20 05:30:08 dialing manager at localhost:44161 2023/06/20 05:30:08 checking machine... 2023/06/20 05:30:08 checking revisions... [ 53.800983] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:30:08 testing simple program... [ 53.848921] cgroup: Unknown subsys name 'net' [ 53.893193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:29:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011aff37 RSI=ffffffff8118d7d9 RDI=ffff888008d7f978 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f9b9 R15=ffff888008d7f978 RIP=ffffffff811306da RFL=00000212 [----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 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=00007ffee2c1e000 CR3=0000000016a6c000 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=0000000000000000 RCX=ffffffff81710fc3 RDX=fffff940000d5649 RSI=0000000000000008 RDI=ffffea00006ab240 RBP=ffff888006957d90 RSP=ffff888006957c00 R8 =0000000000000001 R9 =fffff940000d5648 R10=ffffea00006ab247 R11=0000000000000000 R12=ffffea00006ab240 R13=ffff88800d5ac828 R14=ffff888006957db8 R15=ffffea00006ab274 RIP=ffffffff81710fca 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1d5a851900 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=00007f1d5b3c331c CR3=0000000016a6c000 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