syzkaller login: [ 30.430807] BUG: Bad rss-counter state mm:000000001e5d6786 type:MM_FILEPAGES val:33 [ 30.432006] BUG: Bad rss-counter state mm:000000001e5d6786 type:MM_ANONPAGES val:22 [ 30.463948] ================================================================== [ 30.464453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.465012] Read of size 8 at addr ffff88800fbad5c8 by task sshd/220 [ 30.465477] [ 30.465597] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.466068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.466603] Call Trace: [ 30.466776] [ 30.466933] dump_stack_lvl+0x91/0xf0 [ 30.467204] print_report+0xcc/0x620 [ 30.467471] ? __virt_addr_valid+0x102/0x340 [ 30.467782] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.468115] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.468455] kasan_report+0xbe/0xf0 [ 30.468806] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.469145] vma_interval_tree_remove+0xc75/0xec0 [ 30.469471] vma_prepare+0xc54/0x11a0 [ 30.469731] __split_vma+0x5af/0x950 [ 30.469991] ? __pfx___split_vma+0x10/0x10 [ 30.470275] ? find_held_lock+0x2c/0x110 [ 30.470558] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.470878] ? lock_is_held_type+0x9f/0x120 [ 30.471171] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.471502] ? mtree_range_walk+0x632/0x900 [ 30.471823] ? mas_walk+0x5c7/0x7c0 [ 30.472084] do_vmi_munmap+0x1f1/0x2b0 [ 30.472351] mmap_region+0x1f9/0x2660 [ 30.472621] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.472904] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.473301] ? __pfx_lock_acquire+0x10/0x10 [ 30.473609] ? __pfx_mmap_region+0x10/0x10 [ 30.473923] ? security_mmap_addr+0x7d/0xa0 [ 30.474236] ? get_unmapped_area+0x1f5/0x3f0 [ 30.474561] do_mmap+0x854/0xf00 [ 30.474820] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.475115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.475443] ksys_mmap_pgoff+0x3af/0x500 [ 30.475744] do_syscall_64+0x3f/0x90 [ 30.476022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.476413] RIP: 0033:0x7fd6ea940d82 [ 30.476681] 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 [ 30.477954] RSP: 002b:00007ffc53dba0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.478475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6ea940d82 [ 30.478973] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6e9d7a000 [ 30.479482] RBP: 00007fd6e9d7a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.480005] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c40caeec0 [ 30.480515] R13: 00007ffc53dba0d0 R14: 00007ffc53dba100 R15: 00007ffc53dba460 [ 30.481033] [ 30.481206] [ 30.481332] Allocated by task 213: [ 30.481586] kasan_save_stack+0x22/0x50 [ 30.481886] kasan_set_track+0x25/0x30 [ 30.482172] __kasan_slab_alloc+0x59/0x70 [ 30.482480] kmem_cache_alloc+0x16b/0x370 [ 30.482778] vm_area_dup+0x20/0x160 [ 30.483044] __split_vma+0x170/0x950 [ 30.483320] split_vma+0xc6/0x110 [ 30.483589] mprotect_fixup+0x8d2/0xb30 [ 30.483878] do_mprotect_pkey+0x87e/0xd40 [ 30.484179] __x64_sys_mprotect+0x78/0xc0 [ 30.484485] do_syscall_64+0x3f/0x90 [ 30.484765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.485139] [ 30.485265] Freed by task 213: [ 30.485499] kasan_save_stack+0x22/0x50 [ 30.485786] kasan_set_track+0x25/0x30 [ 30.486074] kasan_save_free_info+0x2b/0x50 [ 30.486388] __kasan_slab_free+0x10a/0x190 [ 30.486702] kmem_cache_free+0x10d/0x4d0 [ 30.487007] rcu_core+0x8c8/0x2860 [ 30.487271] __do_softirq+0x1b7/0x7d4 [ 30.487554] [ 30.487680] Last potentially related work creation: [ 30.488036] kasan_save_stack+0x22/0x50 [ 30.488330] __kasan_record_aux_stack+0x8e/0xa0 [ 30.488666] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.489055] remove_vma+0x139/0x170 [ 30.489314] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.489631] do_vmi_munmap+0x1f1/0x2b0 [ 30.489918] __vm_munmap+0x138/0x3a0 [ 30.490196] __x64_sys_munmap+0x59/0x80 [ 30.490491] do_syscall_64+0x3f/0x90 [ 30.490774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.491147] [ 30.491273] The buggy address belongs to the object at ffff88800fbad570 [ 30.491273] which belongs to the cache vm_area_struct of size 168 [ 30.492166] The buggy address is located 88 bytes inside of [ 30.492166] freed 168-byte region [ffff88800fbad570, ffff88800fbad618) [ 30.493002] [ 30.493129] The buggy address belongs to the physical page: [ 30.493528] page:00000000a72c6a1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbad [ 30.494171] memcg:ffff8880199a0901 [ 30.494420] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.494799] page_type: 0xffffffff() [ 30.495071] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.495618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199a0901 [ 30.496170] page dumped because: kasan: bad access detected [ 30.496557] [ 30.496683] Memory state around the buggy address: [ 30.497027] ffff88800fbad480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.497548] ffff88800fbad500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.498070] >ffff88800fbad580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.498568] ^ [ 30.498962] ffff88800fbad600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.499482] ffff88800fbad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.499997] ================================================================== [ 30.500586] Disabling lock debugging due to kernel taint [ 32.714143] BUG: Bad rss-counter state mm:00000000e8171777 type:MM_FILEPAGES val:33 [ 32.715203] BUG: Bad rss-counter state mm:00000000e8171777 type:MM_ANONPAGES val:22 [ 33.149047] BUG: Bad rss-counter state mm:00000000cfef19d3 type:MM_FILEPAGES val:33 [ 33.150033] BUG: Bad rss-counter state mm:00000000cfef19d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45552' (ECDSA) to the list of known hosts. 2023/06/21 01:05:00 fuzzer started 2023/06/21 01:05:00 dialing manager at localhost:36067 2023/06/21 01:05:00 checking machine... 2023/06/21 01:05:00 checking revisions... [ 33.863716] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:05:00 testing simple program... [ 33.917817] cgroup: Unknown subsys name 'net' [ 33.986347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:05:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f126b833470 CR3=000000000c75a000 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=06646cf8b2d83883ca46bb230c785d7d XMM02=000000000011aa88ec2efd57dc4c00df XMM03=0000000000121d309cae3c937fe4fd38 XMM04=906efd714bae558d00000000000ae988 XMM05=1c89687e0490d70f0000000000132038 XMM06=4fda316b135da52b0000000000131cc0 XMM07=e042d86d42eb936e0000000000121fb0 XMM08=9cae3c937fe4fd38000000000011aae8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8450cc8c RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001faff24 RSI=ffffffff8450cc8c RDI=ffff88800fd7f990 RBP=ffff88800fd7f960 RSP=ffff88800fd7f8c0 R8 =0000000000000001 R9 =ffff88800fd7f908 R10=0000000000038001 R11=00000000000b53d8 R12=ffff88800fd7f990 R13=0000000000000000 R14=ffff8880195a8000 R15=ffff88801934a9d8 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007ff1e9f4f900 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=00007ff1ea506618 CR3=000000000fb4c000 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=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