syzkaller login: [ 30.670555] BUG: Bad rss-counter state mm:000000001f1c9022 type:MM_FILEPAGES val:33 [ 30.671560] BUG: Bad rss-counter state mm:000000001f1c9022 type:MM_ANONPAGES val:22 [ 30.829107] ================================================================== [ 30.830029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.830956] Read of size 8 at addr ffff888016849798 by task sshd/222 [ 30.831718] [ 30.831937] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.833002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.833996] Call Trace: [ 30.834323] [ 30.834604] dump_stack_lvl+0x91/0xf0 [ 30.835120] print_report+0xcc/0x620 [ 30.835609] ? __virt_addr_valid+0x102/0x340 [ 30.836162] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.836777] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.837391] kasan_report+0xbe/0xf0 [ 30.837876] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.838525] vma_interval_tree_remove+0xc75/0xec0 [ 30.839174] vma_prepare+0xc54/0x11a0 [ 30.839683] __split_vma+0x5af/0x950 [ 30.840187] ? __pfx___split_vma+0x10/0x10 [ 30.840752] ? find_held_lock+0x2c/0x110 [ 30.841299] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.841899] ? lock_is_held_type+0x9f/0x120 [ 30.842502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.843143] ? mtree_range_walk+0x632/0x900 [ 30.843733] ? mas_walk+0x5c7/0x7c0 [ 30.844234] do_vmi_munmap+0x1f1/0x2b0 [ 30.844763] mmap_region+0x1f9/0x2660 [ 30.845276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.845824] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.846591] ? __pfx_lock_acquire+0x10/0x10 [ 30.847155] ? __pfx_mmap_region+0x10/0x10 [ 30.847720] ? security_mmap_addr+0x7d/0xa0 [ 30.848291] ? get_unmapped_area+0x1f5/0x3f0 [ 30.848873] do_mmap+0x854/0xf00 [ 30.849333] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.849836] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.850425] ksys_mmap_pgoff+0x3af/0x500 [ 30.850964] do_syscall_64+0x3f/0x90 [ 30.851466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.852146] RIP: 0033:0x7f0c6da22d82 [ 30.852632] 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 [ 30.854950] RSP: 002b:00007ffda588d698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.855922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c6da22d82 [ 30.856817] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c6ce5c000 [ 30.857723] RBP: 00007f0c6ce5c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.858631] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618c6861ec0 [ 30.859545] R13: 00007ffda588d6b0 R14: 00007ffda588d6e0 R15: 00007ffda588da40 [ 30.860469] [ 30.860783] [ 30.861012] Allocated by task 215: [ 30.861466] kasan_save_stack+0x22/0x50 [ 30.862018] kasan_set_track+0x25/0x30 [ 30.862552] __kasan_slab_alloc+0x59/0x70 [ 30.863105] kmem_cache_alloc+0x16b/0x370 [ 30.863662] vm_area_dup+0x20/0x160 [ 30.864145] __split_vma+0x170/0x950 [ 30.864637] split_vma+0xc6/0x110 [ 30.865095] mprotect_fixup+0x8d2/0xb30 [ 30.865627] do_mprotect_pkey+0x87e/0xd40 [ 30.866197] __x64_sys_mprotect+0x78/0xc0 [ 30.866750] do_syscall_64+0x3f/0x90 [ 30.867248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867935] [ 30.868161] Freed by task 215: [ 30.868580] kasan_save_stack+0x22/0x50 [ 30.869116] kasan_set_track+0x25/0x30 [ 30.869638] kasan_save_free_info+0x2b/0x50 [ 30.870350] __kasan_slab_free+0x10a/0x190 [ 30.871043] kmem_cache_free+0x10d/0x4d0 [ 30.871686] rcu_core+0x8c8/0x2860 [ 30.872266] __do_softirq+0x1b7/0x7d4 [ 30.872886] [ 30.873164] Last potentially related work creation: [ 30.873928] kasan_save_stack+0x22/0x50 [ 30.874683] __kasan_record_aux_stack+0x8e/0xa0 [ 30.875418] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.876259] remove_vma+0x139/0x170 [ 30.876854] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.877574] do_vmi_munmap+0x1f1/0x2b0 [ 30.878214] __vm_munmap+0x138/0x3a0 [ 30.878816] __x64_sys_munmap+0x59/0x80 [ 30.879451] do_syscall_64+0x3f/0x90 [ 30.880010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880765] [ 30.881018] The buggy address belongs to the object at ffff888016849740 [ 30.881018] which belongs to the cache vm_area_struct of size 168 [ 30.882744] The buggy address is located 88 bytes inside of [ 30.882744] freed 168-byte region [ffff888016849740, ffff8880168497e8) [ 30.884394] [ 30.884647] The buggy address belongs to the physical page: [ 30.885423] page:00000000151f2c7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16849 [ 30.886743] memcg:ffff88800c806301 [ 30.887196] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.887892] page_type: 0xffffffff() [ 30.888371] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.889364] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c806301 [ 30.890335] page dumped because: kasan: bad access detected [ 30.890995] [ 30.891208] Memory state around the buggy address: [ 30.891788] ffff888016849680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.892639] ffff888016849700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.893491] >ffff888016849780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.894343] ^ [ 30.894839] ffff888016849800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.895699] ffff888016849880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.896548] ================================================================== [ 30.897475] Disabling lock debugging due to kernel taint [ 33.344044] BUG: Bad rss-counter state mm:00000000ae5dfb6f type:MM_FILEPAGES val:33 [ 33.345558] BUG: Bad rss-counter state mm:00000000ae5dfb6f type:MM_ANONPAGES val:22 [ 33.817095] BUG: Bad rss-counter state mm:0000000080c932b0 type:MM_FILEPAGES val:33 [ 33.818319] BUG: Bad rss-counter state mm:0000000080c932b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36588' (ECDSA) to the list of known hosts. 2023/06/20 17:38:00 fuzzer started 2023/06/20 17:38:01 dialing manager at localhost:36067 2023/06/20 17:38:01 checking machine... 2023/06/20 17:38:01 checking revisions... [ 34.561316] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:38:01 testing simple program... [ 34.614232] cgroup: Unknown subsys name 'net' [ 34.674278] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:38:00 Registers: info registers vcpu 0 RAX=0000000000000200 RBX=ffff888019a71a70 RCX=00000000fffffe80 RDX=0000000000000005 RSI=ffff88807ffdc000 RDI=ffffffff81839db7 RBP=ffff88800f02d000 RSP=ffff88806ce09dc0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffe80 R15=ffff88800f02d000 RIP=ffffffff815343ab RFL=00000006 [-----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 00007fceac143900 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=00007fceac6fa618 CR3=000000000dde8000 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=563412feff00545000000000000080fe 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fbeb2ff8c40 CR3=000000000c72a000 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=35552e648f996e9f3b49d9c4a2262aeb XMM02=000000000011b340eff9b2d0a8fce9cb XMM03=000000000011b4102c67c8bc2e329bc3 XMM04=9866d9752d8e6c8b00000000000ae988 XMM05=59d5b690e0af863b0000000000131e40 XMM06=03aae77608c670cc0000000000130ca8 XMM07=e042d86d42eb936e0000000000122300 XMM08=af272d2cd7e80a42000000000011b410 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000