syzkaller login: [ 30.635162] BUG: Bad rss-counter state mm:000000001aade967 type:MM_FILEPAGES val:33 [ 30.635689] BUG: Bad rss-counter state mm:000000001aade967 type:MM_ANONPAGES val:22 [ 30.786296] ================================================================== [ 30.787241] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.788238] Read of size 8 at addr ffff88800ef3a140 by task sshd/220 [ 30.789198] [ 30.789450] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.790377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.791423] Call Trace: [ 30.791766] <TASK> [ 30.792072] dump_stack_lvl+0x91/0xf0 [ 30.792584] print_report+0xcc/0x620 [ 30.793095] ? __virt_addr_valid+0x102/0x340 [ 30.793724] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794397] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795062] kasan_report+0xbe/0xf0 [ 30.795563] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796215] vma_interval_tree_remove+0xc75/0xec0 [ 30.796838] vma_prepare+0xc54/0x11a0 [ 30.797380] __split_vma+0x5af/0x950 [ 30.797877] ? __pfx___split_vma+0x10/0x10 [ 30.798461] ? find_held_lock+0x2c/0x110 [ 30.799010] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.799598] ? lock_is_held_type+0x9f/0x120 [ 30.800163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.800800] ? mtree_range_walk+0x632/0x900 [ 30.801418] ? mas_walk+0x5c7/0x7c0 [ 30.801933] do_vmi_munmap+0x1f1/0x2b0 [ 30.802460] mmap_region+0x1f9/0x2660 [ 30.802968] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.803498] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.804241] ? __pfx_lock_acquire+0x10/0x10 [ 30.804785] ? __pfx_mmap_region+0x10/0x10 [ 30.805367] ? security_mmap_addr+0x7d/0xa0 [ 30.805942] ? get_unmapped_area+0x1f5/0x3f0 [ 30.806524] do_mmap+0x854/0xf00 [ 30.806984] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.807506] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.808093] ksys_mmap_pgoff+0x3af/0x500 [ 30.808616] do_syscall_64+0x3f/0x90 [ 30.809112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809815] RIP: 0033:0x7f8181b08d82 [ 30.810319] 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 [ 30.812542] RSP: 002b:00007ffeea66bb88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.813529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8181b08d82 [ 30.814425] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8180f42000 [ 30.815318] RBP: 00007f8180f42000 R08: 0000000000000009 R09: 0000000000001000 [ 30.816203] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc9058df70 [ 30.817102] R13: 00007ffeea66bba0 R14: 00007ffeea66bbd0 R15: 00007ffeea66bf30 [ 30.818046] </TASK> [ 30.818351] [ 30.818575] Allocated by task 213: [ 30.819009] kasan_save_stack+0x22/0x50 [ 30.819533] kasan_set_track+0x25/0x30 [ 30.820045] __kasan_slab_alloc+0x59/0x70 [ 30.820582] kmem_cache_alloc+0x16b/0x370 [ 30.821120] vm_area_dup+0x20/0x160 [ 30.821634] __split_vma+0x170/0x950 [ 30.822128] split_vma+0xc6/0x110 [ 30.822594] mprotect_fixup+0x8d2/0xb30 [ 30.823116] do_mprotect_pkey+0x87e/0xd40 [ 30.823663] __x64_sys_mprotect+0x78/0xc0 [ 30.824201] do_syscall_64+0x3f/0x90 [ 30.824717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825418] [ 30.825642] Freed by task 213: [ 30.826065] kasan_save_stack+0x22/0x50 [ 30.826587] kasan_set_track+0x25/0x30 [ 30.827104] kasan_save_free_info+0x2b/0x50 [ 30.827656] __kasan_slab_free+0x10a/0x190 [ 30.828206] kmem_cache_free+0x10d/0x4d0 [ 30.828734] rcu_core+0x8c8/0x2860 [ 30.829204] __do_softirq+0x1b7/0x7d4 [ 30.829728] [ 30.830052] Last potentially related work creation: [ 30.830653] kasan_save_stack+0x22/0x50 [ 30.831176] __kasan_record_aux_stack+0x8e/0xa0 [ 30.831769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.832442] remove_vma+0x139/0x170 [ 30.832910] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.833522] do_vmi_munmap+0x1f1/0x2b0 [ 30.834034] __vm_munmap+0x138/0x3a0 [ 30.834517] __x64_sys_munmap+0x59/0x80 [ 30.835031] do_syscall_64+0x3f/0x90 [ 30.835525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.836197] [ 30.836423] The buggy address belongs to the object at ffff88800ef3a0e8 [ 30.836423] which belongs to the cache vm_area_struct of size 168 [ 30.838019] The buggy address is located 88 bytes inside of [ 30.838019] freed 168-byte region [ffff88800ef3a0e8, ffff88800ef3a190) [ 30.839487] [ 30.839712] The buggy address belongs to the physical page: [ 30.840400] page:000000000d353438 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef3a [ 30.841567] memcg:ffff88800dd7e701 [ 30.842020] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.842688] page_type: 0xffffffff() [ 30.843149] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.844120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd7e701 [ 30.845066] page dumped because: kasan: bad access detected [ 30.845770] [ 30.846010] Memory state around the buggy address: [ 30.846614] ffff88800ef3a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.847495] ffff88800ef3a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.848377] >ffff88800ef3a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.849284] ^ [ 30.849971] ffff88800ef3a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.850853] ffff88800ef3a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.851737] ================================================================== [ 30.852764] Disabling lock debugging due to kernel taint [ 32.527721] BUG: Bad rss-counter state mm:000000003b66980b type:MM_FILEPAGES val:33 [ 32.528896] BUG: Bad rss-counter state mm:000000003b66980b type:MM_ANONPAGES val:22 [ 33.000453] BUG: Bad rss-counter state mm:00000000e5dbab66 type:MM_FILEPAGES val:33 [ 33.002024] BUG: Bad rss-counter state mm:00000000e5dbab66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20082' (ECDSA) to the list of known hosts. 2023/06/20 15:57:49 fuzzer started 2023/06/20 15:57:49 dialing manager at localhost:36067 2023/06/20 15:57:49 checking machine... 2023/06/20 15:57:49 checking revisions... [ 33.863447] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:57:49 testing simple program... [ 33.928657] cgroup: Unknown subsys name 'net' [ 34.005390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:57:48 Registers: info registers vcpu 0 RAX=00000000000000e5 RBX=ffff88801612c300 RCX=0000000000000000 RDX=0000000000000cc0 RSI=0000000000000001 RDI=0000000000000cc0 RBP=ffff8880087b83c0 RSP=ffff88800c647cd8 R8 =ffff88801612b300 R9 =0000000000000000 R10=ffffed1002c25660 R11=0000000000000000 R12=ffff88801612b300 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff8180c700 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 00007fec04a52900 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=00007fec0500a0b0 CR3=0000000018a7c000 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=0000000000000286 RBX=ffff888019387be8 RCX=00000000fffffe80 RDX=0000000000000005 RSI=ffff88807ffdc000 RDI=ffff88800e241600 RBP=ffff88800e241600 RSP=ffff88806cf09dd8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000fffffe80 R15=ffff88800e241600 RIP=ffffffff818398f1 RFL=00000086 [--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 00007f4afa5e4900 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=00007f4af9a74a38 CR3=000000000c7ce000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f3b530dad040d88100000000000ae988 XMM05=c5e513f322a91d210000000000132f98 XMM06=4fda316b135da52b0000000000131d88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000