syzkaller login: [ 32.255851] sshd (220) used greatest stack depth: 24128 bytes left [ 32.257562] BUG: Bad rss-counter state mm:00000000cd7bb8cb type:MM_FILEPAGES val:33 [ 32.258537] BUG: Bad rss-counter state mm:00000000cd7bb8cb type:MM_ANONPAGES val:22 [ 32.423998] ================================================================== [ 32.425047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.425972] Read of size 8 at addr ffff88800fc35140 by task sshd/227 [ 32.426818] [ 32.427034] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.427885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.428868] Call Trace: [ 32.429182] [ 32.429463] dump_stack_lvl+0x91/0xf0 [ 32.429950] print_report+0xcc/0x620 [ 32.430428] ? __virt_addr_valid+0x102/0x340 [ 32.430974] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.431585] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.432209] kasan_report+0xbe/0xf0 [ 32.432684] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.433300] vma_interval_tree_remove+0xc75/0xec0 [ 32.433899] vma_prepare+0xc54/0x11a0 [ 32.434373] __split_vma+0x5af/0x950 [ 32.434839] ? __pfx___split_vma+0x10/0x10 [ 32.435363] ? find_held_lock+0x2c/0x110 [ 32.435876] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.436458] ? lock_is_held_type+0x9f/0x120 [ 32.436996] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.437599] ? mtree_range_walk+0x632/0x900 [ 32.438141] ? mas_walk+0x5c7/0x7c0 [ 32.438615] do_vmi_munmap+0x1f1/0x2b0 [ 32.439101] mmap_region+0x1f9/0x2660 [ 32.439577] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.440093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.440800] ? __pfx_lock_acquire+0x10/0x10 [ 32.441321] ? __pfx_mmap_region+0x10/0x10 [ 32.441842] ? security_mmap_addr+0x7d/0xa0 [ 32.442370] ? get_unmapped_area+0x1f5/0x3f0 [ 32.442916] do_mmap+0x854/0xf00 [ 32.443350] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.443849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.444422] ksys_mmap_pgoff+0x3af/0x500 [ 32.444924] do_syscall_64+0x3f/0x90 [ 32.445396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.446031] RIP: 0033:0x7fb778972d82 [ 32.446482] 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 [ 32.448585] RSP: 002b:00007ffc7c399768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.449486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb778972d82 [ 32.450322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb777dac000 [ 32.451160] RBP: 00007fb777dac000 R08: 0000000000000009 R09: 0000000000001000 [ 32.451993] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b89b270f70 [ 32.452835] R13: 00007ffc7c399780 R14: 00007ffc7c3997b0 R15: 00007ffc7c399b10 [ 32.453687] [ 32.453982] [ 32.454194] Allocated by task 220: [ 32.454615] kasan_save_stack+0x22/0x50 [ 32.455113] kasan_set_track+0x25/0x30 [ 32.455613] __kasan_slab_alloc+0x59/0x70 [ 32.456148] kmem_cache_alloc+0x16b/0x370 [ 32.456660] vm_area_dup+0x20/0x160 [ 32.457110] __split_vma+0x170/0x950 [ 32.457572] split_vma+0xc6/0x110 [ 32.458003] mprotect_fixup+0x8d2/0xb30 [ 32.458499] do_mprotect_pkey+0x87e/0xd40 [ 32.459024] __x64_sys_mprotect+0x78/0xc0 [ 32.459540] do_syscall_64+0x3f/0x90 [ 32.460004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.460644] [ 32.460857] Freed by task 220: [ 32.461244] kasan_save_stack+0x22/0x50 [ 32.461745] kasan_set_track+0x25/0x30 [ 32.462231] kasan_save_free_info+0x2b/0x50 [ 32.462756] __kasan_slab_free+0x10a/0x190 [ 32.463285] kmem_cache_free+0x10d/0x4d0 [ 32.463793] rcu_core+0x8c8/0x2860 [ 32.464250] __do_softirq+0x1b7/0x7d4 [ 32.464727] [ 32.464944] Last potentially related work creation: [ 32.465521] kasan_save_stack+0x22/0x50 [ 32.466029] __kasan_record_aux_stack+0x8e/0xa0 [ 32.466601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.467243] remove_vma+0x139/0x170 [ 32.467694] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.468258] do_vmi_munmap+0x1f1/0x2b0 [ 32.468741] __vm_munmap+0x138/0x3a0 [ 32.469199] __x64_sys_munmap+0x59/0x80 [ 32.469692] do_syscall_64+0x3f/0x90 [ 32.470157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.470790] [ 32.471007] The buggy address belongs to the object at ffff88800fc350e8 [ 32.471007] which belongs to the cache vm_area_struct of size 168 [ 32.472470] The buggy address is located 88 bytes inside of [ 32.472470] freed 168-byte region [ffff88800fc350e8, ffff88800fc35190) [ 32.473855] [ 32.474068] The buggy address belongs to the physical page: [ 32.474726] page:00000000b5e188a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc35 [ 32.475803] memcg:ffff888014776801 [ 32.476241] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.476878] page_type: 0xffffffff() [ 32.477324] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.478252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014776801 [ 32.479163] page dumped because: kasan: bad access detected [ 32.479822] [ 32.480038] Memory state around the buggy address: [ 32.480635] ffff88800fc35000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.481495] ffff88800fc35080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.482353] >ffff88800fc35100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.483201] ^ [ 32.483842] ffff88800fc35180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.484718] ffff88800fc35200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.485557] ================================================================== [ 32.486617] Disabling lock debugging due to kernel taint [ 34.431036] BUG: Bad rss-counter state mm:0000000005fded79 type:MM_FILEPAGES val:33 [ 34.432222] BUG: Bad rss-counter state mm:0000000005fded79 type:MM_ANONPAGES val:22 [ 34.926276] BUG: Bad rss-counter state mm:00000000505d585a type:MM_FILEPAGES val:33 [ 34.927446] BUG: Bad rss-counter state mm:00000000505d585a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22496' (ECDSA) to the list of known hosts. 2023/06/19 19:44:13 fuzzer started 2023/06/19 19:44:13 dialing manager at localhost:44161 2023/06/19 19:44:13 checking machine... 2023/06/19 19:44:13 checking revisions... [ 35.572035] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:44:13 testing simple program... [ 35.625953] cgroup: Unknown subsys name 'net' [ 35.665928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:44:12 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=0000000000000001 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=00007fffc382eff8 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=00007fee8d26c51000005570dbae0790 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff8153447a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450bf7c RSP=ffff8880145fff10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=000000000000002e R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8153447a 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 00007fb9f44e4900 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=00007fdb713e7650 CR3=000000000c5f6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=7ee36d3d8824445300000000000ae988 XMM05=d887ac1690f784490000000000135af0 XMM06=16bbfc4fa606b6250000000000134950 XMM07=fb795ef6d65770560000000000124c00 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000