syzkaller login: [ 31.614438] BUG: Bad rss-counter state mm:00000000e9cba832 type:MM_FILEPAGES val:33 [ 31.615783] BUG: Bad rss-counter state mm:00000000e9cba832 type:MM_ANONPAGES val:22 [ 31.656938] ================================================================== [ 31.657918] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.658869] Read of size 8 at addr ffff888016ab2a50 by task sshd/220 [ 31.659712] [ 31.659935] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.660800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.661772] Call Trace: [ 31.662096] [ 31.662384] dump_stack_lvl+0x91/0xf0 [ 31.662872] print_report+0xcc/0x620 [ 31.663353] ? __virt_addr_valid+0x102/0x340 [ 31.663900] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.664510] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.665128] kasan_report+0xbe/0xf0 [ 31.665604] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.666243] vma_interval_tree_remove+0xc75/0xec0 [ 31.666891] vma_prepare+0xc54/0x11a0 [ 31.667405] __split_vma+0x5af/0x950 [ 31.667913] ? __pfx___split_vma+0x10/0x10 [ 31.668483] ? find_held_lock+0x2c/0x110 [ 31.669042] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.669645] ? lock_is_held_type+0x9f/0x120 [ 31.670240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.670894] ? mtree_range_walk+0x632/0x900 [ 31.671483] ? mas_walk+0x5c7/0x7c0 [ 31.671991] do_vmi_munmap+0x1f1/0x2b0 [ 31.672516] mmap_region+0x1f9/0x2660 [ 31.673037] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.673588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.674374] ? __pfx_lock_acquire+0x10/0x10 [ 31.674946] ? __pfx_mmap_region+0x10/0x10 [ 31.675512] ? security_mmap_addr+0x7d/0xa0 [ 31.676091] ? get_unmapped_area+0x1f5/0x3f0 [ 31.676708] do_mmap+0x854/0xf00 [ 31.677162] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.677679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.678287] ksys_mmap_pgoff+0x3af/0x500 [ 31.678826] do_syscall_64+0x3f/0x90 [ 31.679328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.680015] RIP: 0033:0x7fe2420d2d82 [ 31.680494] 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 [ 31.682788] RSP: 002b:00007fffb53d57a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.683743] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2420d2d82 [ 31.684629] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe24150c000 [ 31.685534] RBP: 00007fe24150c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.686474] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fed981d90 [ 31.687385] R13: 00007fffb53d57c0 R14: 00007fffb53d57f0 R15: 00007fffb53d5b50 [ 31.688297] [ 31.688604] [ 31.688832] Allocated by task 213: [ 31.689284] kasan_save_stack+0x22/0x50 [ 31.689810] kasan_set_track+0x25/0x30 [ 31.690344] __kasan_slab_alloc+0x59/0x70 [ 31.690898] kmem_cache_alloc+0x16b/0x370 [ 31.691437] vm_area_dup+0x20/0x160 [ 31.691911] __split_vma+0x170/0x950 [ 31.692399] split_vma+0xc6/0x110 [ 31.692859] mprotect_fixup+0x8d2/0xb30 [ 31.693388] do_mprotect_pkey+0x87e/0xd40 [ 31.693936] __x64_sys_mprotect+0x78/0xc0 [ 31.694497] do_syscall_64+0x3f/0x90 [ 31.694988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695659] [ 31.695888] Freed by task 213: [ 31.696302] kasan_save_stack+0x22/0x50 [ 31.696832] kasan_set_track+0x25/0x30 [ 31.697356] kasan_save_free_info+0x2b/0x50 [ 31.697912] __kasan_slab_free+0x10a/0x190 [ 31.698499] kmem_cache_free+0x10d/0x4d0 [ 31.699028] rcu_core+0x8c8/0x2860 [ 31.699494] __do_softirq+0x1b7/0x7d4 [ 31.699994] [ 31.700217] Last potentially related work creation: [ 31.700839] kasan_save_stack+0x22/0x50 [ 31.701369] __kasan_record_aux_stack+0x8e/0xa0 [ 31.701972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.702667] remove_vma+0x139/0x170 [ 31.703141] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.703731] do_vmi_munmap+0x1f1/0x2b0 [ 31.704243] __vm_munmap+0x138/0x3a0 [ 31.704734] __x64_sys_munmap+0x59/0x80 [ 31.705263] do_syscall_64+0x3f/0x90 [ 31.705761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.706442] [ 31.706665] The buggy address belongs to the object at ffff888016ab29f8 [ 31.706665] which belongs to the cache vm_area_struct of size 168 [ 31.708235] The buggy address is located 88 bytes inside of [ 31.708235] freed 168-byte region [ffff888016ab29f8, ffff888016ab2aa0) [ 31.709732] [ 31.709959] The buggy address belongs to the physical page: [ 31.710678] page:00000000d3614c9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ab2 [ 31.711831] memcg:ffff888019719c01 [ 31.712291] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.712981] page_type: 0xffffffff() [ 31.713457] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.714453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019719c01 [ 31.715413] page dumped because: kasan: bad access detected [ 31.716113] [ 31.716339] Memory state around the buggy address: [ 31.716950] ffff888016ab2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.717861] ffff888016ab2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.718786] >ffff888016ab2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.719690] ^ [ 31.720429] ffff888016ab2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.721337] ffff888016ab2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.722260] ================================================================== [ 31.723330] Disabling lock debugging due to kernel taint [ 33.939933] BUG: Bad rss-counter state mm:0000000046969b17 type:MM_FILEPAGES val:33 [ 33.941000] BUG: Bad rss-counter state mm:0000000046969b17 type:MM_ANONPAGES val:22 [ 34.473864] BUG: Bad rss-counter state mm:000000002aa22df1 type:MM_FILEPAGES val:33 [ 34.475068] BUG: Bad rss-counter state mm:000000002aa22df1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46244' (ECDSA) to the list of known hosts. 2023/06/20 02:49:24 fuzzer started 2023/06/20 02:49:24 dialing manager at localhost:44161 2023/06/20 02:49:24 checking machine... 2023/06/20 02:49:24 checking revisions... [ 35.130775] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:49:25 testing simple program... [ 35.181541] cgroup: Unknown subsys name 'net' [ 35.237514] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff888015d70000 RSI=ffffffff837263a5 RDI=0000000000000005 RBP=0000000000000008 RSP=ffff8880196bf7b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=ffffffff87f96b18 R14=ffff888008fa5800 R15=0000000000000006 RIP=ffffffff814c07e0 RFL=00000286 [--S--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 00007ff3b73f6900 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=00007ff3b79ad618 CR3=0000000018ec6000 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=ffff888008c58400 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=00007f768d1c1040 CR3=000000000ca50000 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=d1f06e21ece1c882804d230e568fde4d XMM02=ec2efd57dc4c00df000000000011f900 XMM03=c3640d1be1a0df81000000000011f9d0 XMM04=2e97c1df2f91795a00000000000ae988 XMM05=04a4d3d350507fda0000000000133da0 XMM06=c291bd5c70af25b90000000000133a28 XMM07=e042d86d42eb936e00000000001242b8 XMM08=c3640d1be1a0df81000000000011f9d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000