syzkaller login: [ 31.242257] BUG: Bad rss-counter state mm:000000003e117c00 type:MM_FILEPAGES val:33 [ 31.243464] BUG: Bad rss-counter state mm:000000003e117c00 type:MM_ANONPAGES val:22 [ 31.290959] ================================================================== [ 31.291873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.292807] Read of size 8 at addr ffff88800dea36b0 by task sshd/220 [ 31.293684] [ 31.293977] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.294846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.295833] Call Trace: [ 31.296164] [ 31.296462] dump_stack_lvl+0x91/0xf0 [ 31.296959] print_report+0xcc/0x620 [ 31.297444] ? __virt_addr_valid+0x102/0x340 [ 31.298017] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.298638] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.299256] kasan_report+0xbe/0xf0 [ 31.299737] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300353] vma_interval_tree_remove+0xc75/0xec0 [ 31.300958] vma_prepare+0xc54/0x11a0 [ 31.301438] __split_vma+0x5af/0x950 [ 31.301944] ? __pfx___split_vma+0x10/0x10 [ 31.302473] ? find_held_lock+0x2c/0x110 [ 31.302999] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.303567] ? lock_is_held_type+0x9f/0x120 [ 31.304108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.304717] ? mtree_range_walk+0x632/0x900 [ 31.305273] ? mas_walk+0x5c7/0x7c0 [ 31.305766] do_vmi_munmap+0x1f1/0x2b0 [ 31.306260] mmap_region+0x1f9/0x2660 [ 31.306745] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.307260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.307984] ? __pfx_lock_acquire+0x10/0x10 [ 31.308519] ? __pfx_mmap_region+0x10/0x10 [ 31.309058] ? security_mmap_addr+0x7d/0xa0 [ 31.309633] ? get_unmapped_area+0x1f5/0x3f0 [ 31.310191] do_mmap+0x854/0xf00 [ 31.310639] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.311140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.311701] ksys_mmap_pgoff+0x3af/0x500 [ 31.312208] do_syscall_64+0x3f/0x90 [ 31.312685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313330] RIP: 0033:0x7f12d9b4fd82 [ 31.313807] 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 [ 31.315919] RSP: 002b:00007ffee7d0c828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.316830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12d9b4fd82 [ 31.317685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12d8f89000 [ 31.318529] RBP: 00007f12d8f89000 R08: 0000000000000009 R09: 0000000000001000 [ 31.319375] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0be15ef70 [ 31.320216] R13: 00007ffee7d0c840 R14: 00007ffee7d0c870 R15: 00007ffee7d0cbd0 [ 31.321073] [ 31.321377] [ 31.321612] Allocated by task 213: [ 31.322037] kasan_save_stack+0x22/0x50 [ 31.322543] kasan_set_track+0x25/0x30 [ 31.323045] __kasan_slab_alloc+0x59/0x70 [ 31.323569] kmem_cache_alloc+0x16b/0x370 [ 31.324090] vm_area_dup+0x20/0x160 [ 31.324545] __split_vma+0x170/0x950 [ 31.325014] split_vma+0xc6/0x110 [ 31.325451] mprotect_fixup+0x8d2/0xb30 [ 31.325961] do_mprotect_pkey+0x87e/0xd40 [ 31.326486] __x64_sys_mprotect+0x78/0xc0 [ 31.327011] do_syscall_64+0x3f/0x90 [ 31.327491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.328134] [ 31.328347] Freed by task 13: [ 31.328734] kasan_save_stack+0x22/0x50 [ 31.329232] kasan_set_track+0x25/0x30 [ 31.329740] kasan_save_free_info+0x2b/0x50 [ 31.330266] __kasan_slab_free+0x10a/0x190 [ 31.330796] kmem_cache_free+0x10d/0x4d0 [ 31.331305] rcu_core+0x8c8/0x2860 [ 31.331748] __do_softirq+0x1b7/0x7d4 [ 31.332232] [ 31.332450] Last potentially related work creation: [ 31.333031] kasan_save_stack+0x22/0x50 [ 31.333567] __kasan_record_aux_stack+0x8e/0xa0 [ 31.334211] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.334858] remove_vma+0x139/0x170 [ 31.335313] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.335885] do_vmi_munmap+0x1f1/0x2b0 [ 31.336375] __vm_munmap+0x138/0x3a0 [ 31.336847] __x64_sys_munmap+0x59/0x80 [ 31.337358] do_syscall_64+0x3f/0x90 [ 31.337853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338505] [ 31.338728] The buggy address belongs to the object at ffff88800dea3658 [ 31.338728] which belongs to the cache vm_area_struct of size 168 [ 31.340219] The buggy address is located 88 bytes inside of [ 31.340219] freed 168-byte region [ffff88800dea3658, ffff88800dea3700) [ 31.341666] [ 31.341887] The buggy address belongs to the physical page: [ 31.342562] page:0000000094945428 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea3 [ 31.343656] memcg:ffff88800a046c01 [ 31.344087] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.344726] page_type: 0xffffffff() [ 31.345184] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.346120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a046c01 [ 31.347036] page dumped because: kasan: bad access detected [ 31.347702] [ 31.347922] Memory state around the buggy address: [ 31.348515] ffff88800dea3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.349387] ffff88800dea3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.350268] >ffff88800dea3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351128] ^ [ 31.351718] ffff88800dea3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.352569] ffff88800dea3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.353418] ================================================================== [ 31.354369] Disabling lock debugging due to kernel taint [ 33.897626] BUG: Bad rss-counter state mm:000000009c7e4e45 type:MM_FILEPAGES val:33 [ 33.898656] BUG: Bad rss-counter state mm:000000009c7e4e45 type:MM_ANONPAGES val:22 [ 34.445106] BUG: Bad rss-counter state mm:00000000e08b1d9c type:MM_FILEPAGES val:33 [ 34.446285] BUG: Bad rss-counter state mm:00000000e08b1d9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2601' (ECDSA) to the list of known hosts. 2023/06/21 02:00:11 fuzzer started 2023/06/21 02:00:11 dialing manager at localhost:36067 2023/06/21 02:00:11 checking machine... 2023/06/21 02:00:11 checking revisions... [ 35.129872] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:00:11 testing simple program... [ 35.183485] cgroup: Unknown subsys name 'net' [ 35.244729] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:00:11 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff88800fed7af0 RSP=ffff88800fed79d8 R8 =0000000000000000 R9 =ffff88800fed7ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88800fed7af8 R13=ffff88800fed7ae0 R14=ffff88800fed7ad9 R15=ffff88800fed7a98 RIP=ffffffff8113077a 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 00007f66ba7dc900 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=00007ffd9aeb9000 CR3=000000000dbce000 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=0000000000000003 RBX=00000000000b4570 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff8880087b8780 RSP=ffff88806cf09dd0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=0000000000000001 R14=ffffffff8186b835 R15=ffff88800d9eaf80 RIP=ffffffff84511935 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 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=00007fae0e505d90 CR3=000000000d872000 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=4aeb3e80da3282b2744bcd3a0ec5c63c XMM02=ec2efd57dc4c00df000000000011a900 XMM03=9735d4b5aa4698c8000000000011a9d0 XMM04=38a9e65003991c6700000000000ae988 XMM05=a39fafe643f1d1cf0000000000132ac8 XMM06=4fda316b135da52b0000000000131b68 XMM07=e042d86d42eb936e0000000000122090 XMM08=9735d4b5aa4698c8000000000011a9d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000