syzkaller login: [ 30.605348] BUG: Bad rss-counter state mm:00000000b155c041 type:MM_FILEPAGES val:33 [ 30.606709] BUG: Bad rss-counter state mm:00000000b155c041 type:MM_ANONPAGES val:22 [ 30.773491] ================================================================== [ 30.774510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.775566] Read of size 8 at addr ffff888017399798 by task sshd/220 [ 30.776497] [ 30.776712] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.777516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.778461] Call Trace: [ 30.778764] [ 30.779032] dump_stack_lvl+0x91/0xf0 [ 30.779501] print_report+0xcc/0x620 [ 30.779962] ? __virt_addr_valid+0x102/0x340 [ 30.780494] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781085] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781670] kasan_report+0xbe/0xf0 [ 30.782123] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782721] vma_interval_tree_remove+0xc75/0xec0 [ 30.783300] vma_prepare+0xc54/0x11a0 [ 30.783766] __split_vma+0x5af/0x950 [ 30.784219] ? __pfx___split_vma+0x10/0x10 [ 30.784748] ? find_held_lock+0x2c/0x110 [ 30.785247] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.785784] ? lock_is_held_type+0x9f/0x120 [ 30.786298] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.786876] ? mtree_range_walk+0x632/0x900 [ 30.787409] ? mas_walk+0x5c7/0x7c0 [ 30.787867] do_vmi_munmap+0x1f1/0x2b0 [ 30.788337] mmap_region+0x1f9/0x2660 [ 30.788814] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.789299] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.789982] ? __pfx_lock_acquire+0x10/0x10 [ 30.790499] ? __pfx_mmap_region+0x10/0x10 [ 30.791004] ? security_mmap_addr+0x7d/0xa0 [ 30.791503] ? get_unmapped_area+0x1f5/0x3f0 [ 30.792030] do_mmap+0x854/0xf00 [ 30.792442] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.792935] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.793474] ksys_mmap_pgoff+0x3af/0x500 [ 30.793966] do_syscall_64+0x3f/0x90 [ 30.794425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795047] RIP: 0033:0x7f00069e6d82 [ 30.795479] 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 [ 30.797523] RSP: 002b:00007ffdeab1ff28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.798380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00069e6d82 [ 30.799195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0005e20000 [ 30.800010] RBP: 00007f0005e20000 R08: 0000000000000009 R09: 0000000000001000 [ 30.800827] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a2bf65ec0 [ 30.801635] R13: 00007ffdeab1ff40 R14: 00007ffdeab1ff70 R15: 00007ffdeab202d0 [ 30.802459] [ 30.802745] [ 30.802953] Allocated by task 213: [ 30.803357] kasan_save_stack+0x22/0x50 [ 30.803837] kasan_set_track+0x25/0x30 [ 30.804305] __kasan_slab_alloc+0x59/0x70 [ 30.804830] kmem_cache_alloc+0x16b/0x370 [ 30.805329] vm_area_dup+0x20/0x160 [ 30.805770] __split_vma+0x170/0x950 [ 30.806211] split_vma+0xc6/0x110 [ 30.806635] mprotect_fixup+0x8d2/0xb30 [ 30.807113] do_mprotect_pkey+0x87e/0xd40 [ 30.807609] __x64_sys_mprotect+0x78/0xc0 [ 30.808104] do_syscall_64+0x3f/0x90 [ 30.808560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.809174] [ 30.809386] Freed by task 213: [ 30.809763] kasan_save_stack+0x22/0x50 [ 30.810238] kasan_set_track+0x25/0x30 [ 30.810712] kasan_save_free_info+0x2b/0x50 [ 30.811224] __kasan_slab_free+0x10a/0x190 [ 30.811731] kmem_cache_free+0x10d/0x4d0 [ 30.812219] rcu_core+0x8c8/0x2860 [ 30.812652] __do_softirq+0x1b7/0x7d4 [ 30.813204] [ 30.813421] Last potentially related work creation: [ 30.814000] kasan_save_stack+0x22/0x50 [ 30.814686] __kasan_record_aux_stack+0x8e/0xa0 [ 30.815352] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.815994] remove_vma+0x139/0x170 [ 30.816455] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.817201] do_vmi_munmap+0x1f1/0x2b0 [ 30.817786] __vm_munmap+0x138/0x3a0 [ 30.818354] __x64_sys_munmap+0x59/0x80 [ 30.818961] do_syscall_64+0x3f/0x90 [ 30.819536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820317] [ 30.820593] The buggy address belongs to the object at ffff888017399740 [ 30.820593] which belongs to the cache vm_area_struct of size 168 [ 30.822421] The buggy address is located 88 bytes inside of [ 30.822421] freed 168-byte region [ffff888017399740, ffff8880173997e8) [ 30.824150] [ 30.824404] The buggy address belongs to the physical page: [ 30.825218] page:000000003f6ca467 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17399 [ 30.826564] memcg:ffff88800debcc01 [ 30.827092] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.827882] page_type: 0xffffffff() [ 30.828435] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.829592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800debcc01 [ 30.830705] page dumped because: kasan: bad access detected [ 30.831516] [ 30.831780] Memory state around the buggy address: [ 30.832501] ffff888017399680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.833554] ffff888017399700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.834608] >ffff888017399780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.835658] ^ [ 30.836262] ffff888017399800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.837323] ffff888017399880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.838373] ================================================================== [ 30.839725] Disabling lock debugging due to kernel taint [ 32.839291] BUG: Bad rss-counter state mm:000000005e17ce11 type:MM_FILEPAGES val:33 [ 32.840861] BUG: Bad rss-counter state mm:000000005e17ce11 type:MM_ANONPAGES val:22 [ 33.309819] BUG: Bad rss-counter state mm:00000000770a4ea4 type:MM_FILEPAGES val:33 [ 33.310808] BUG: Bad rss-counter state mm:00000000770a4ea4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21536' (ECDSA) to the list of known hosts. 2023/06/20 18:29:17 fuzzer started 2023/06/20 18:29:17 dialing manager at localhost:36067 2023/06/20 18:29:17 checking machine... 2023/06/20 18:29:17 checking revisions... [ 34.030495] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:29:17 testing simple program... [ 34.081124] cgroup: Unknown subsys name 'net' [ 34.131707] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888008f7a000 RCX=0000000000000000 RDX=ffff8880169a8000 RSI=ffffffff818d98a8 RDI=0000000000000005 RBP=ffff88800893e280 RSP=ffff888009997d80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800893e4a8 R15=0000000000000000 RIP=ffffffff814c086b RFL=00000207 [-----PC] 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 00007f303a503900 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=00007f303aabb0b0 CR3=000000000d94e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=d3fdd5f48436fbd7 RBX=000055b745dec290 RCX=00007f4c50355ad0 RDX=00000000000aead0 RSI=0000000000000017 RDI=00007fff9fd12850 RBP=00007fff9fd12a90 RSP=00007fff9fd12850 R8 =0000000000000053 R9 =00007fff9fd127e8 R10=0000000000000002 R11=0000000000656434 R12=000055b745dec290 R13=d96303afecf11689 R14=00007fff9fd129c8 R15=00007fff9fd12a38 RIP=00007f4c51a41bb5 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4c50ebc900 00000000 00000000 GS =0000 0000000000000000 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=00007f4c502e7c38 CR3=0000000013a0c000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=deaa236271db4ea700000000000ae988 XMM05=daed095f999bfe5000000000001332e8 XMM06=19e9129bd510f2350000000000132180 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000