syzkaller login: [ 38.645725] BUG: Bad rss-counter state mm:000000006e503ac2 type:MM_FILEPAGES val:33 [ 38.647990] BUG: Bad rss-counter state mm:000000006e503ac2 type:MM_ANONPAGES val:22 [ 38.824974] ================================================================== [ 38.825957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.826983] Read of size 8 at addr ffff88800c56bd08 by task sshd/227 [ 38.827896] [ 38.828132] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.829059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.830101] Call Trace: [ 38.830458] [ 38.830765] dump_stack_lvl+0x91/0xf0 [ 38.831288] print_report+0xcc/0x620 [ 38.831805] ? __virt_addr_valid+0x102/0x340 [ 38.832391] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833041] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833705] kasan_report+0xbe/0xf0 [ 38.834213] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.834886] vma_interval_tree_remove+0xc75/0xec0 [ 38.835524] vma_prepare+0xc54/0x11a0 [ 38.836035] __split_vma+0x5af/0x950 [ 38.836540] ? __pfx___split_vma+0x10/0x10 [ 38.837099] ? find_held_lock+0x2c/0x110 [ 38.837660] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.838260] ? lock_is_held_type+0x9f/0x120 [ 38.838852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.839501] ? mtree_range_walk+0x632/0x900 [ 38.840094] ? mas_walk+0x5c7/0x7c0 [ 38.840604] do_vmi_munmap+0x1f1/0x2b0 [ 38.841132] mmap_region+0x1f9/0x2660 [ 38.841646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.842189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.842956] ? __pfx_lock_acquire+0x10/0x10 [ 38.843527] ? __pfx_mmap_region+0x10/0x10 [ 38.844094] ? security_mmap_addr+0x7d/0xa0 [ 38.844662] ? get_unmapped_area+0x1f5/0x3f0 [ 38.845251] do_mmap+0x854/0xf00 [ 38.845724] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.846254] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.846859] ksys_mmap_pgoff+0x3af/0x500 [ 38.847403] do_syscall_64+0x3f/0x90 [ 38.847912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.848604] RIP: 0033:0x7f3175ba0d82 [ 38.849090] 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 [ 38.851387] RSP: 002b:00007ffc8814be08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.852356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3175ba0d82 [ 38.853263] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3174fda000 [ 38.854174] RBP: 00007f3174fda000 R08: 0000000000000009 R09: 0000000000001000 [ 38.855082] R10: 0000000000000812 R11: 0000000000000206 R12: 000056407920df70 [ 38.855986] R13: 00007ffc8814be20 R14: 00007ffc8814be50 R15: 00007ffc8814c1b0 [ 38.856884] [ 38.857196] [ 38.857426] Allocated by task 220: [ 38.857884] kasan_save_stack+0x22/0x50 [ 38.858434] kasan_set_track+0x25/0x30 [ 38.858970] __kasan_slab_alloc+0x59/0x70 [ 38.859526] kmem_cache_alloc+0x16b/0x370 [ 38.860079] vm_area_dup+0x20/0x160 [ 38.860570] __split_vma+0x170/0x950 [ 38.861067] split_vma+0xc6/0x110 [ 38.861535] mprotect_fixup+0x8d2/0xb30 [ 38.862071] do_mprotect_pkey+0x87e/0xd40 [ 38.862636] __x64_sys_mprotect+0x78/0xc0 [ 38.863197] do_syscall_64+0x3f/0x90 [ 38.863706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.864390] [ 38.864618] Freed by task 220: [ 38.865036] kasan_save_stack+0x22/0x50 [ 38.865568] kasan_set_track+0x25/0x30 [ 38.866097] kasan_save_free_info+0x2b/0x50 [ 38.866670] __kasan_slab_free+0x10a/0x190 [ 38.867242] kmem_cache_free+0x10d/0x4d0 [ 38.867794] rcu_core+0x8c8/0x2860 [ 38.868273] __do_softirq+0x1b7/0x7d4 [ 38.868786] [ 38.869017] Last potentially related work creation: [ 38.869647] kasan_save_stack+0x22/0x50 [ 38.870190] __kasan_record_aux_stack+0x8e/0xa0 [ 38.870827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.871513] remove_vma+0x139/0x170 [ 38.872000] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.872599] do_vmi_munmap+0x1f1/0x2b0 [ 38.873119] __vm_munmap+0x138/0x3a0 [ 38.873626] __x64_sys_munmap+0x59/0x80 [ 38.874154] do_syscall_64+0x3f/0x90 [ 38.874673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.875364] [ 38.875610] Second to last potentially related work creation: [ 38.876371] kasan_save_stack+0x22/0x50 [ 38.876935] __kasan_record_aux_stack+0x8e/0xa0 [ 38.877576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.878302] remove_vma+0x139/0x170 [ 38.878821] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.879453] do_vmi_munmap+0x1f1/0x2b0 [ 38.880001] mmap_region+0x1f9/0x2660 [ 38.880541] do_mmap+0x854/0xf00 [ 38.881024] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.881576] ksys_mmap_pgoff+0x3af/0x500 [ 38.882140] do_syscall_64+0x3f/0x90 [ 38.882695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.883424] [ 38.883669] The buggy address belongs to the object at ffff88800c56bcb0 [ 38.883669] which belongs to the cache vm_area_struct of size 168 [ 38.885326] The buggy address is located 88 bytes inside of [ 38.885326] freed 168-byte region [ffff88800c56bcb0, ffff88800c56bd58) [ 38.886937] [ 38.887181] The buggy address belongs to the physical page: [ 38.887905] page:0000000082c14190 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc56b [ 38.889042] memcg:ffff88800cc0e601 [ 38.889498] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.890182] page_type: 0xffffffff() [ 38.890682] raw: 0100000000000200 ffff8880087a0c80 ffffea000037d800 dead000000000008 [ 38.891649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc0e601 [ 38.892598] page dumped because: kasan: bad access detected [ 38.893290] [ 38.893522] Memory state around the buggy address: [ 38.894141] ffff88800c56bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.895053] ffff88800c56bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.895962] >ffff88800c56bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.896867] ^ [ 38.897335] ffff88800c56bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.898238] ffff88800c56be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.899144] ================================================================== [ 38.900248] Disabling lock debugging due to kernel taint [ 41.154642] BUG: Bad rss-counter state mm:000000001da396fb type:MM_FILEPAGES val:33 [ 41.156033] BUG: Bad rss-counter state mm:000000001da396fb type:MM_ANONPAGES val:22 [ 41.525620] BUG: Bad rss-counter state mm:0000000038518e7a type:MM_FILEPAGES val:33 [ 41.526364] BUG: Bad rss-counter state mm:0000000038518e7a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39122' (ECDSA) to the list of known hosts. 2023/06/20 12:19:01 fuzzer started 2023/06/20 12:19:01 dialing manager at localhost:36067 2023/06/20 12:19:01 checking machine... 2023/06/20 12:19:01 checking revisions... [ 42.216721] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:19:01 testing simple program... [ 42.270659] cgroup: Unknown subsys name 'net' [ 42.314446] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:19:01 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f108000 RSI=ffffffff81f30b42 RDI=0000000000000004 RBP=ffff8880095275b8 RSP=ffff88801974f9d0 R8 =0000000000000004 R9 =0000000000000480 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000480 R14=0000000000000007 R15=0000000000001032 RIP=ffffffff814c0880 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 00007f5c146d9900 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=00007f5c14c90618 CR3=00000000168c8000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffffffffffffffff XMM02=ffffffffffffff00ffffffffffffffff XMM03=0000000000000000000000005e356692 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffffff00ffffff00ffffff00 XMM08=00000000000000810000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180ce8d RBX=ffffffff85dfe188 RCX=ffffffff8180ce88 RDX=0000000000000000 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe188 RSP=ffff88800fdf6ee0 R8 =ffffffff86139066 R9 =ffff88800fdf6fd8 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe18c R13=ffffffff85dfe158 R14=ffffffff85dfe184 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000293 [--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fca5b90f900 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=00007fca5b8d4008 CR3=000000001c81a000 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=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