syzkaller login: [ 31.576571] BUG: Bad rss-counter state mm:00000000bbf423ee type:MM_FILEPAGES val:33 [ 31.577792] BUG: Bad rss-counter state mm:00000000bbf423ee type:MM_ANONPAGES val:22 [ 31.673858] ================================================================== [ 31.674760] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.675691] Read of size 8 at addr ffff88800eaf7c20 by task sshd/220 [ 31.676459] [ 31.676679] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.677549] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.678549] Call Trace: [ 31.678878] [ 31.679158] dump_stack_lvl+0x91/0xf0 [ 31.679655] print_report+0xcc/0x620 [ 31.680134] ? __virt_addr_valid+0x102/0x340 [ 31.680689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.681295] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.681913] kasan_report+0xbe/0xf0 [ 31.682392] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.683022] vma_interval_tree_remove+0xc75/0xec0 [ 31.683617] vma_prepare+0xc54/0x11a0 [ 31.684092] __split_vma+0x5af/0x950 [ 31.684560] ? __pfx___split_vma+0x10/0x10 [ 31.685099] ? find_held_lock+0x2c/0x110 [ 31.685620] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.686205] ? lock_is_held_type+0x9f/0x120 [ 31.686742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.687348] ? mtree_range_walk+0x632/0x900 [ 31.687902] ? mas_walk+0x5c7/0x7c0 [ 31.688375] do_vmi_munmap+0x1f1/0x2b0 [ 31.688866] mmap_region+0x1f9/0x2660 [ 31.689349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.689853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.690577] ? __pfx_lock_acquire+0x10/0x10 [ 31.691108] ? __pfx_mmap_region+0x10/0x10 [ 31.691632] ? security_mmap_addr+0x7d/0xa0 [ 31.692167] ? get_unmapped_area+0x1f5/0x3f0 [ 31.692715] do_mmap+0x854/0xf00 [ 31.693152] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.693641] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.694199] ksys_mmap_pgoff+0x3af/0x500 [ 31.694709] do_syscall_64+0x3f/0x90 [ 31.695187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.695828] RIP: 0033:0x7f6f23e19d82 [ 31.696283] 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 [ 31.698404] RSP: 002b:00007ffd024f7a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.699306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f23e19d82 [ 31.700147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f23253000 [ 31.700983] RBP: 00007f6f23253000 R08: 0000000000000009 R09: 0000000000001000 [ 31.701824] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563212236ec0 [ 31.702678] R13: 00007ffd024f7ab0 R14: 00007ffd024f7ae0 R15: 00007ffd024f7e40 [ 31.703532] [ 31.703823] [ 31.704041] Allocated by task 213: [ 31.704465] kasan_save_stack+0x22/0x50 [ 31.704965] kasan_set_track+0x25/0x30 [ 31.705453] __kasan_slab_alloc+0x59/0x70 [ 31.705975] kmem_cache_alloc+0x16b/0x370 [ 31.706567] vm_area_dup+0x20/0x160 [ 31.707026] __split_vma+0x170/0x950 [ 31.707520] split_vma+0xc6/0x110 [ 31.707962] mprotect_fixup+0x8d2/0xb30 [ 31.708480] do_mprotect_pkey+0x87e/0xd40 [ 31.709005] __x64_sys_mprotect+0x78/0xc0 [ 31.709616] do_syscall_64+0x3f/0x90 [ 31.710121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.710770] [ 31.710993] Freed by task 213: [ 31.711404] kasan_save_stack+0x22/0x50 [ 31.711908] kasan_set_track+0x25/0x30 [ 31.712415] kasan_save_free_info+0x2b/0x50 [ 31.712961] __kasan_slab_free+0x10a/0x190 [ 31.713518] kmem_cache_free+0x10d/0x4d0 [ 31.714024] rcu_core+0x8c8/0x2860 [ 31.714507] __do_softirq+0x1b7/0x7d4 [ 31.714990] [ 31.715236] Last potentially related work creation: [ 31.715813] kasan_save_stack+0x22/0x50 [ 31.716329] __kasan_record_aux_stack+0x8e/0xa0 [ 31.716899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.717568] remove_vma+0x139/0x170 [ 31.718022] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.718606] do_vmi_munmap+0x1f1/0x2b0 [ 31.719094] __vm_munmap+0x138/0x3a0 [ 31.719574] __x64_sys_munmap+0x59/0x80 [ 31.720068] do_syscall_64+0x3f/0x90 [ 31.720557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.721226] [ 31.721445] The buggy address belongs to the object at ffff88800eaf7bc8 [ 31.721445] which belongs to the cache vm_area_struct of size 168 [ 31.722955] The buggy address is located 88 bytes inside of [ 31.722955] freed 168-byte region [ffff88800eaf7bc8, ffff88800eaf7c70) [ 31.724383] [ 31.724600] The buggy address belongs to the physical page: [ 31.725276] page:00000000a8f7753b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeaf7 [ 31.726381] memcg:ffff88800c643301 [ 31.726809] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.727470] page_type: 0xffffffff() [ 31.727919] raw: 0100000000000200 ffff8880087a0c80 ffffea0000354a00 dead000000000002 [ 31.728853] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c643301 [ 31.729781] page dumped because: kasan: bad access detected [ 31.730474] [ 31.730692] Memory state around the buggy address: [ 31.731290] ffff88800eaf7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.732161] ffff88800eaf7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.733013] >ffff88800eaf7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.733887] ^ [ 31.734445] ffff88800eaf7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.735318] ffff88800eaf7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.736188] ================================================================== [ 31.737218] Disabling lock debugging due to kernel taint [ 33.806142] BUG: Bad rss-counter state mm:00000000d8d868e0 type:MM_FILEPAGES val:33 [ 33.807121] BUG: Bad rss-counter state mm:00000000d8d868e0 type:MM_ANONPAGES val:22 [ 34.292203] BUG: Bad rss-counter state mm:0000000093f11afa type:MM_FILEPAGES val:33 [ 34.293138] BUG: Bad rss-counter state mm:0000000093f11afa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27132' (ECDSA) to the list of known hosts. 2023/06/21 06:44:12 fuzzer started 2023/06/21 06:44:12 dialing manager at localhost:36067 2023/06/21 06:44:12 checking machine... 2023/06/21 06:44:12 checking revisions... [ 34.988356] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:44:12 testing simple program... [ 35.036893] cgroup: Unknown subsys name 'net' [ 35.106273] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:44:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018387868 RCX=0000000000000001 RDX=1ffff11003070f0e RSI=ffffffff8186c9c4 RDI=ffff888018387870 RBP=0000000000000002 RSP=ffff888018387780 R8 =0000000000000001 R9 =ffff8880183877e0 R10=0000000000038001 R11=0000000000022987 R12=ffff888018387868 R13=0000000000000000 R14=ffff88800f21b680 R15=ffff88800c5c8000 RIP=ffffffff813ad4be RFL=00000212 [----A--] 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 00007fd5da73c900 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=00007fd5dacf40b0 CR3=000000000fb26000 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=1ffffffff0bc0479 RBX=ffffffff85e023cc RCX=ffffffff81846193 RDX=0000000000000000 RSI=ffffffff8613f3f6 RDI=ffffffff85e023b8 RBP=ffffffff85e023cc RSP=ffff88806cf099e0 R8 =ffffffff8613f3f6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000021e7d R12=ffffffff85e023d0 R13=ffffffff85e023b8 R14=ffffffff85e023c8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f1badae7900 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=00007f1bacf62d40 CR3=000000000ed70000 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=0c43563cd1688be400000000000ae988 XMM05=fe5471d3477978620000000000133c30 XMM06=19e9129bd510f2350000000000132ac8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000