syzkaller login: [ 30.222065] sshd (213) used greatest stack depth: 24128 bytes left [ 30.224015] BUG: Bad rss-counter state mm:000000000206aaaa type:MM_FILEPAGES val:33 [ 30.225769] BUG: Bad rss-counter state mm:000000000206aaaa type:MM_ANONPAGES val:22 [ 30.390235] ================================================================== [ 30.391157] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.392111] Read of size 8 at addr ffff88800e080058 by task sshd/220 [ 30.392875] [ 30.393101] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.394078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.394992] Call Trace: [ 30.395292] [ 30.395598] dump_stack_lvl+0x91/0xf0 [ 30.396066] print_report+0xcc/0x620 [ 30.396527] ? __virt_addr_valid+0x102/0x340 [ 30.397049] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.397632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.398219] kasan_report+0xbe/0xf0 [ 30.398674] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.399269] vma_interval_tree_remove+0xc75/0xec0 [ 30.399850] vma_prepare+0xc54/0x11a0 [ 30.400308] __split_vma+0x5af/0x950 [ 30.400756] ? __pfx___split_vma+0x10/0x10 [ 30.401260] ? find_held_lock+0x2c/0x110 [ 30.401754] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.402286] ? lock_is_held_type+0x9f/0x120 [ 30.402797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.403384] ? mtree_range_walk+0x632/0x900 [ 30.403938] ? mas_walk+0x5c7/0x7c0 [ 30.404399] do_vmi_munmap+0x1f1/0x2b0 [ 30.404885] mmap_region+0x1f9/0x2660 [ 30.405354] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.405862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.406570] ? __pfx_lock_acquire+0x10/0x10 [ 30.407098] ? __pfx_mmap_region+0x10/0x10 [ 30.407634] ? security_mmap_addr+0x7d/0xa0 [ 30.408155] ? get_unmapped_area+0x1f5/0x3f0 [ 30.408685] do_mmap+0x854/0xf00 [ 30.409118] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.409600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.410148] ksys_mmap_pgoff+0x3af/0x500 [ 30.410649] do_syscall_64+0x3f/0x90 [ 30.411125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.411768] RIP: 0033:0x7f0067de9d82 [ 30.412218] 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 [ 30.414299] RSP: 002b:00007ffe94904ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.415194] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0067de9d82 [ 30.416048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0067223000 [ 30.416873] RBP: 00007f0067223000 R08: 0000000000000009 R09: 0000000000001000 [ 30.417690] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ab5d7aec0 [ 30.418523] R13: 00007ffe94904ae0 R14: 00007ffe94904b10 R15: 00007ffe94904e70 [ 30.419376] [ 30.419665] [ 30.419878] Allocated by task 213: [ 30.420293] kasan_save_stack+0x22/0x50 [ 30.420789] kasan_set_track+0x25/0x30 [ 30.421270] __kasan_slab_alloc+0x59/0x70 [ 30.421781] kmem_cache_alloc+0x16b/0x370 [ 30.422290] vm_area_dup+0x20/0x160 [ 30.422728] __split_vma+0x170/0x950 [ 30.423186] split_vma+0xc6/0x110 [ 30.423637] mprotect_fixup+0x8d2/0xb30 [ 30.424135] do_mprotect_pkey+0x87e/0xd40 [ 30.424647] __x64_sys_mprotect+0x78/0xc0 [ 30.425156] do_syscall_64+0x3f/0x90 [ 30.425625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.426247] [ 30.426455] Freed by task 213: [ 30.426835] kasan_save_stack+0x22/0x50 [ 30.427327] kasan_set_track+0x25/0x30 [ 30.427816] kasan_save_free_info+0x2b/0x50 [ 30.428334] __kasan_slab_free+0x10a/0x190 [ 30.428854] kmem_cache_free+0x10d/0x4d0 [ 30.429338] rcu_core+0x8c8/0x2860 [ 30.429774] __do_softirq+0x1b7/0x7d4 [ 30.430242] [ 30.430451] Last potentially related work creation: [ 30.431020] kasan_save_stack+0x22/0x50 [ 30.431515] __kasan_record_aux_stack+0x8e/0xa0 [ 30.432083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.432713] remove_vma+0x139/0x170 [ 30.433157] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.433706] do_vmi_munmap+0x1f1/0x2b0 [ 30.434180] __vm_munmap+0x138/0x3a0 [ 30.434733] __x64_sys_munmap+0x59/0x80 [ 30.435217] do_syscall_64+0x3f/0x90 [ 30.435688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.436314] [ 30.436524] The buggy address belongs to the object at ffff88800e080000 [ 30.436524] which belongs to the cache vm_area_struct of size 168 [ 30.437943] The buggy address is located 88 bytes inside of [ 30.437943] freed 168-byte region [ffff88800e080000, ffff88800e0800a8) [ 30.439315] [ 30.439530] The buggy address belongs to the physical page: [ 30.440174] page:00000000dad6f987 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe080 [ 30.441238] memcg:ffff8880169a9e01 [ 30.441663] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.442287] page_type: 0xffffffff() [ 30.442727] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.443638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169a9e01 [ 30.444530] page dumped because: kasan: bad access detected [ 30.445170] [ 30.445380] Memory state around the buggy address: [ 30.445945] ffff88800e07ff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.446795] ffff88800e07ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.447637] >ffff88800e080000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.448467] ^ [ 30.449177] ffff88800e080080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.450036] ffff88800e080100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.450955] ================================================================== [ 30.451936] Disabling lock debugging due to kernel taint [ 32.676211] BUG: Bad rss-counter state mm:000000000f21e099 type:MM_FILEPAGES val:33 [ 32.677280] BUG: Bad rss-counter state mm:000000000f21e099 type:MM_ANONPAGES val:22 [ 33.109531] BUG: Bad rss-counter state mm:000000007def4667 type:MM_FILEPAGES val:33 [ 33.110673] BUG: Bad rss-counter state mm:000000007def4667 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37127' (ECDSA) to the list of known hosts. 2023/06/21 06:20:32 fuzzer started 2023/06/21 06:20:33 dialing manager at localhost:36067 2023/06/21 06:20:33 checking machine... 2023/06/21 06:20:33 checking revisions... [ 33.844419] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:20:33 testing simple program... [ 33.897655] cgroup: Unknown subsys name 'net' [ 33.936437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:20:32 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007feb43cc3dad RCX=ffffffff813a0add RDX=ffff8880145e9b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88800f02f428 R8 =0000000000000006 R9 =00007feb43cc3dad R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff8880145e9b40 R15=ffff88800cfc7260 RIP=ffffffff814c086b 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 00007feb43681700 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=00007f0b0f249740 CR3=000000001582e000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36313835332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363138 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88801007fe20 RCX=0000000000000000 RDX=ffff8880164351c0 RSI=ffffffff844a5c88 RDI=ffff88801007fe30 RBP=ffff88800e04b00c RSP=ffff88801007fd88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888018d503a0 R13=ffffed100200ffcb R14=ffff88800e04ba1c R15=ffff88801007fe59 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f74a15bb900 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=000055cbbad8b744 CR3=0000000009454000 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=0000000000000000000055cbb9e3f060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000