syzkaller login: [ 32.239722] BUG: Bad rss-counter state mm:0000000094a4dfc0 type:MM_FILEPAGES val:33 [ 32.241216] BUG: Bad rss-counter state mm:0000000094a4dfc0 type:MM_ANONPAGES val:22 [ 32.401026] ================================================================== [ 32.402163] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.403338] Read of size 8 at addr ffff88800c5d1058 by task sshd/220 [ 32.404506] [ 32.404788] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.405864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.407091] Call Trace: [ 32.407485] [ 32.407850] dump_stack_lvl+0x91/0xf0 [ 32.408460] print_report+0xcc/0x620 [ 32.409067] ? __virt_addr_valid+0x102/0x340 [ 32.409764] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.410527] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.411305] kasan_report+0xbe/0xf0 [ 32.411902] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.412681] vma_interval_tree_remove+0xc75/0xec0 [ 32.413482] vma_prepare+0xc54/0x11a0 [ 32.414110] __split_vma+0x5af/0x950 [ 32.414739] ? __pfx___split_vma+0x10/0x10 [ 32.415424] ? find_held_lock+0x2c/0x110 [ 32.416133] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.416798] ? lock_is_held_type+0x9f/0x120 [ 32.417365] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.418013] ? mtree_range_walk+0x632/0x900 [ 32.418595] ? mas_walk+0x5c7/0x7c0 [ 32.419099] do_vmi_munmap+0x1f1/0x2b0 [ 32.419622] mmap_region+0x1f9/0x2660 [ 32.420149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.420685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.421436] ? __pfx_lock_acquire+0x10/0x10 [ 32.422000] ? __pfx_mmap_region+0x10/0x10 [ 32.422569] ? security_mmap_addr+0x7d/0xa0 [ 32.423132] ? get_unmapped_area+0x1f5/0x3f0 [ 32.423725] do_mmap+0x854/0xf00 [ 32.424186] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.424709] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.425301] ksys_mmap_pgoff+0x3af/0x500 [ 32.425851] do_syscall_64+0x3f/0x90 [ 32.426361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.427052] RIP: 0033:0x7f3917ad3d82 [ 32.427541] 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 [ 32.429834] RSP: 002b:00007ffc643787f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.430798] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3917ad3d82 [ 32.431711] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3916f0d000 [ 32.432621] RBP: 00007f3916f0d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.433522] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf1ffaad90 [ 32.434414] R13: 00007ffc64378810 R14: 00007ffc64378840 R15: 00007ffc64378ba0 [ 32.435330] [ 32.435659] [ 32.435892] Allocated by task 213: [ 32.436349] kasan_save_stack+0x22/0x50 [ 32.436889] kasan_set_track+0x25/0x30 [ 32.437418] __kasan_slab_alloc+0x59/0x70 [ 32.437975] kmem_cache_alloc+0x16b/0x370 [ 32.438528] vm_area_dup+0x20/0x160 [ 32.439008] __split_vma+0x170/0x950 [ 32.439504] split_vma+0xc6/0x110 [ 32.439978] mprotect_fixup+0x8d2/0xb30 [ 32.440499] do_mprotect_pkey+0x87e/0xd40 [ 32.441056] __x64_sys_mprotect+0x78/0xc0 [ 32.441614] do_syscall_64+0x3f/0x90 [ 32.442116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.442790] [ 32.443017] Freed by task 213: [ 32.443436] kasan_save_stack+0x22/0x50 [ 32.443981] kasan_set_track+0x25/0x30 [ 32.444511] kasan_save_free_info+0x2b/0x50 [ 32.445142] __kasan_slab_free+0x10a/0x190 [ 32.445705] kmem_cache_free+0x10d/0x4d0 [ 32.446239] rcu_core+0x8c8/0x2860 [ 32.446705] __do_softirq+0x1b7/0x7d4 [ 32.447210] [ 32.447432] Last potentially related work creation: [ 32.448069] kasan_save_stack+0x22/0x50 [ 32.448603] __kasan_record_aux_stack+0x8e/0xa0 [ 32.449219] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.449907] remove_vma+0x139/0x170 [ 32.450384] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.450980] do_vmi_munmap+0x1f1/0x2b0 [ 32.451496] __vm_munmap+0x138/0x3a0 [ 32.451994] __x64_sys_munmap+0x59/0x80 [ 32.452521] do_syscall_64+0x3f/0x90 [ 32.453036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.453715] [ 32.453942] The buggy address belongs to the object at ffff88800c5d1000 [ 32.453942] which belongs to the cache vm_area_struct of size 168 [ 32.455510] The buggy address is located 88 bytes inside of [ 32.455510] freed 168-byte region [ffff88800c5d1000, ffff88800c5d10a8) [ 32.457055] [ 32.457289] The buggy address belongs to the physical page: [ 32.457996] page:00000000dcb0b8ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5d1 [ 32.459144] memcg:ffff888014760301 [ 32.459600] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.460298] page_type: 0xffffffff() [ 32.460778] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.461772] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014760301 [ 32.462740] page dumped because: kasan: bad access detected [ 32.463438] [ 32.463683] Memory state around the buggy address: [ 32.464299] ffff88800c5d0f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.465219] ffff88800c5d0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.466137] >ffff88800c5d1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.467039] ^ [ 32.467820] ffff88800c5d1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.468723] ffff88800c5d1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.469627] ================================================================== [ 32.470606] Disabling lock debugging due to kernel taint [ 34.282934] BUG: Bad rss-counter state mm:000000007ca77007 type:MM_FILEPAGES val:33 [ 34.283746] BUG: Bad rss-counter state mm:000000007ca77007 type:MM_ANONPAGES val:22 [ 34.829831] BUG: Bad rss-counter state mm:00000000422dde36 type:MM_FILEPAGES val:33 [ 34.831025] BUG: Bad rss-counter state mm:00000000422dde36 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47407' (ECDSA) to the list of known hosts. 2023/06/19 18:57:58 fuzzer started 2023/06/19 18:57:58 dialing manager at localhost:44161 2023/06/19 18:57:58 checking machine... 2023/06/19 18:57:58 checking revisions... [ 35.545454] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:57:58 testing simple program... [ 35.590500] cgroup: Unknown subsys name 'net' [ 35.638026] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:57:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00005591a67d8f40 RCX=0000000000000000 RDX=1ffff11002b7ffb3 RSI=ffffffff8215d438 RDI=ffff888015bffda0 RBP=ffff888015bffd98 RSP=ffff888015bff9a8 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000005 R11=00000000000b6996 R12=0000000000000000 R13=ffff88800ca34400 R14=0000000000000053 R15=ffff888015bffd90 RIP=ffffffff814c07e4 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 00007f2071456900 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=00007f2071a0b650 CR3=0000000019cbc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801cc38260 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806cf09d78 RBP=1ffff1100d9e13ab RSP=ffff88806cf09d50 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=ffff88801cc38268 R13=ffff88801cc38270 R14=ffffffff813782a8 R15=ffff88800ef1d980 RIP=ffffffff812e00f6 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=00007efee21e8dc0 CR3=000000000d718000 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=b4dd02579c0a6fa9e2482d69e2409056 XMM02=2c67c8bc2e329bc3000000000011c7c0 XMM03=fb795ef6d65770560000000000124428 XMM04=b4028e10e61fa63000000000000ae988 XMM05=19e9129bd510f2350000000000133fc8 XMM06=3799a828ebb12ff40000000000132e30 XMM07=e042d86d42eb936e00000000001246a8 XMM08=00870ec8bea40a0e000000000011c820 XMM09=00000000000000000000000000000000 XMM10=20200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000