syzkaller login: [ 31.551991] BUG: Bad rss-counter state mm:00000000cd2c78a7 type:MM_FILEPAGES val:33 [ 31.553221] BUG: Bad rss-counter state mm:00000000cd2c78a7 type:MM_ANONPAGES val:22 [ 31.592151] ================================================================== [ 31.593093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.594053] Read of size 8 at addr ffff888018a69c20 by task sshd/220 [ 31.594835] [ 31.595059] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.595956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.596958] Call Trace: [ 31.597283] [ 31.597577] dump_stack_lvl+0x91/0xf0 [ 31.598078] print_report+0xcc/0x620 [ 31.598568] ? __virt_addr_valid+0x102/0x340 [ 31.599138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.599766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600415] kasan_report+0xbe/0xf0 [ 31.600895] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601525] vma_interval_tree_remove+0xc75/0xec0 [ 31.602131] vma_prepare+0xc54/0x11a0 [ 31.602621] __split_vma+0x5af/0x950 [ 31.603105] ? __pfx___split_vma+0x10/0x10 [ 31.603646] ? find_held_lock+0x2c/0x110 [ 31.604174] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.604758] ? lock_is_held_type+0x9f/0x120 [ 31.605304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.605912] ? mtree_range_walk+0x632/0x900 [ 31.606478] ? mas_walk+0x5c7/0x7c0 [ 31.606952] do_vmi_munmap+0x1f1/0x2b0 [ 31.607467] mmap_region+0x1f9/0x2660 [ 31.607962] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.608491] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.609227] ? __pfx_lock_acquire+0x10/0x10 [ 31.609768] ? __pfx_mmap_region+0x10/0x10 [ 31.610304] ? security_mmap_addr+0x7d/0xa0 [ 31.610838] ? get_unmapped_area+0x1f5/0x3f0 [ 31.611392] do_mmap+0x854/0xf00 [ 31.611835] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.612338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.612907] ksys_mmap_pgoff+0x3af/0x500 [ 31.613413] do_syscall_64+0x3f/0x90 [ 31.613891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614534] RIP: 0033:0x7f583abe3d82 [ 31.614992] 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 [ 31.617125] RSP: 002b:00007ffd028e2ec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.618234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f583abe3d82 [ 31.619090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f583a01d000 [ 31.619939] RBP: 00007f583a01d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.620812] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560ee47f7f70 [ 31.621670] R13: 00007ffd028e2ee0 R14: 00007ffd028e2f10 R15: 00007ffd028e3270 [ 31.622548] [ 31.622846] [ 31.623063] Allocated by task 213: [ 31.623497] kasan_save_stack+0x22/0x50 [ 31.624009] kasan_set_track+0x25/0x30 [ 31.624521] __kasan_slab_alloc+0x59/0x70 [ 31.625051] kmem_cache_alloc+0x16b/0x370 [ 31.625584] vm_area_dup+0x20/0x160 [ 31.626053] __split_vma+0x170/0x950 [ 31.626526] split_vma+0xc6/0x110 [ 31.626972] mprotect_fixup+0x8d2/0xb30 [ 31.627476] do_mprotect_pkey+0x87e/0xd40 [ 31.628017] __x64_sys_mprotect+0x78/0xc0 [ 31.628552] do_syscall_64+0x3f/0x90 [ 31.629038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.629687] [ 31.629908] Freed by task 213: [ 31.630300] kasan_save_stack+0x22/0x50 [ 31.630806] kasan_set_track+0x25/0x30 [ 31.631302] kasan_save_free_info+0x2b/0x50 [ 31.631846] __kasan_slab_free+0x10a/0x190 [ 31.632408] kmem_cache_free+0x10d/0x4d0 [ 31.632924] rcu_core+0x8c8/0x2860 [ 31.633374] __do_softirq+0x1b7/0x7d4 [ 31.633860] [ 31.634077] Last potentially related work creation: [ 31.634664] kasan_save_stack+0x22/0x50 [ 31.635166] __kasan_record_aux_stack+0x8e/0xa0 [ 31.635744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.636398] remove_vma+0x139/0x170 [ 31.636858] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.637422] do_vmi_munmap+0x1f1/0x2b0 [ 31.637911] __vm_munmap+0x138/0x3a0 [ 31.638381] __x64_sys_munmap+0x59/0x80 [ 31.638884] do_syscall_64+0x3f/0x90 [ 31.639359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.640007] [ 31.640245] The buggy address belongs to the object at ffff888018a69bc8 [ 31.640245] which belongs to the cache vm_area_struct of size 168 [ 31.641725] The buggy address is located 88 bytes inside of [ 31.641725] freed 168-byte region [ffff888018a69bc8, ffff888018a69c70) [ 31.643139] [ 31.643358] The buggy address belongs to the physical page: [ 31.644023] page:00000000c69cdb73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18a69 [ 31.645136] memcg:ffff88800ef1b001 [ 31.645591] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.646241] page_type: 0xffffffff() [ 31.646692] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.647607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef1b001 [ 31.648519] page dumped because: kasan: bad access detected [ 31.649187] [ 31.649405] Memory state around the buggy address: [ 31.649990] ffff888018a69b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.650848] ffff888018a69b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.651708] >ffff888018a69c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.652566] ^ [ 31.653098] ffff888018a69c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.653956] ffff888018a69d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.654821] ================================================================== [ 31.655847] Disabling lock debugging due to kernel taint [ 33.617063] BUG: Bad rss-counter state mm:000000006cde0853 type:MM_FILEPAGES val:33 [ 33.618255] BUG: Bad rss-counter state mm:000000006cde0853 type:MM_ANONPAGES val:22 [ 34.063935] BUG: Bad rss-counter state mm:00000000d31aba31 type:MM_FILEPAGES val:33 [ 34.064963] BUG: Bad rss-counter state mm:00000000d31aba31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58638' (ECDSA) to the list of known hosts. 2023/06/20 03:22:47 fuzzer started 2023/06/20 03:22:48 dialing manager at localhost:44161 2023/06/20 03:22:48 checking machine... 2023/06/20 03:22:48 checking revisions... [ 34.782253] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:22:48 testing simple program... [ 34.836283] cgroup: Unknown subsys name 'net' [ 34.898353] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:22:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cf2f280 RCX=ffffffff8366c8c8 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800f565960 RBP=0000000000000000 RSP=ffff88800eb47af0 R8 =0000000000000001 R9 =ffffed1001eacb2c R10=ffff88800f565963 R11=00000000000b6996 R12=ffff88800f565960 R13=ffff88800f565940 R14=0000000000000cc0 R15=ffff888008fce000 RIP=ffffffff814c0186 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 00007f0bfdc6f900 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=00007f0bfe226618 CR3=000000000e426000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f957eed9b00 CR3=000000000ea9c000 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=2fd33c26d8f04c8e3b440155c19ee24c XMM02=000000000011c980eff9b2d0a8fce9cb XMM03=000000000011ca502c67c8bc2e329bc3 XMM04=c7c2fcb6cfa8535100000000000ae988 XMM05=19e9129bd510f2350000000000133e20 XMM06=3c195514804905d40000000000132c88 XMM07=e042d86d42eb936e0000000000124518 XMM08=08a188aef3a7ba98000000000011ca50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000