syzkaller login: [ 36.006484] BUG: Bad rss-counter state mm:00000000c992ba4a type:MM_FILEPAGES val:33 [ 36.007805] BUG: Bad rss-counter state mm:00000000c992ba4a type:MM_ANONPAGES val:22 [ 36.167365] ================================================================== [ 36.168311] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.169235] Read of size 8 at addr ffff88800daf6058 by task sshd/220 [ 36.169992] [ 36.170205] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.171237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.172212] Call Trace: [ 36.172531] [ 36.172813] dump_stack_lvl+0x91/0xf0 [ 36.173315] print_report+0xcc/0x620 [ 36.173798] ? __virt_addr_valid+0x102/0x340 [ 36.174347] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.174972] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.175584] kasan_report+0xbe/0xf0 [ 36.176051] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.176667] vma_interval_tree_remove+0xc75/0xec0 [ 36.177266] vma_prepare+0xc54/0x11a0 [ 36.177742] __split_vma+0x5af/0x950 [ 36.178211] ? __pfx___split_vma+0x10/0x10 [ 36.178736] ? find_held_lock+0x2c/0x110 [ 36.179274] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.179837] ? lock_is_held_type+0x9f/0x120 [ 36.180375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.180979] ? mtree_range_walk+0x632/0x900 [ 36.181526] ? mas_walk+0x5c7/0x7c0 [ 36.181995] do_vmi_munmap+0x1f1/0x2b0 [ 36.182490] mmap_region+0x1f9/0x2660 [ 36.182980] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.183490] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.184198] ? __pfx_lock_acquire+0x10/0x10 [ 36.184728] ? __pfx_mmap_region+0x10/0x10 [ 36.185251] ? security_mmap_addr+0x7d/0xa0 [ 36.185778] ? get_unmapped_area+0x1f5/0x3f0 [ 36.186324] do_mmap+0x854/0xf00 [ 36.186772] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.187290] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.187850] ksys_mmap_pgoff+0x3af/0x500 [ 36.188355] do_syscall_64+0x3f/0x90 [ 36.188827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.189470] RIP: 0033:0x7fd5be5bed82 [ 36.189924] 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 [ 36.192071] RSP: 002b:00007ffe9c850f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.192972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5be5bed82 [ 36.193809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5bd9f8000 [ 36.194644] RBP: 00007fd5bd9f8000 R08: 0000000000000009 R09: 0000000000001000 [ 36.195503] R10: 0000000000000812 R11: 0000000000000206 R12: 00005650babefec0 [ 36.196342] R13: 00007ffe9c850f60 R14: 00007ffe9c850f90 R15: 00007ffe9c8512f0 [ 36.197193] [ 36.197490] [ 36.197704] Allocated by task 213: [ 36.198137] kasan_save_stack+0x22/0x50 [ 36.198647] kasan_set_track+0x25/0x30 [ 36.199149] __kasan_slab_alloc+0x59/0x70 [ 36.199665] kmem_cache_alloc+0x16b/0x370 [ 36.200178] vm_area_dup+0x20/0x160 [ 36.200633] __split_vma+0x170/0x950 [ 36.201104] split_vma+0xc6/0x110 [ 36.201543] mprotect_fixup+0x8d2/0xb30 [ 36.202042] do_mprotect_pkey+0x87e/0xd40 [ 36.202560] __x64_sys_mprotect+0x78/0xc0 [ 36.203093] do_syscall_64+0x3f/0x90 [ 36.203565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.204204] [ 36.204417] Freed by task 213: [ 36.204811] kasan_save_stack+0x22/0x50 [ 36.205313] kasan_set_track+0x25/0x30 [ 36.205805] kasan_save_free_info+0x2b/0x50 [ 36.206351] __kasan_slab_free+0x10a/0x190 [ 36.206885] kmem_cache_free+0x10d/0x4d0 [ 36.207394] rcu_core+0x8c8/0x2860 [ 36.207838] __do_softirq+0x1b7/0x7d4 [ 36.208313] [ 36.208529] Last potentially related work creation: [ 36.209108] kasan_save_stack+0x22/0x50 [ 36.209616] __kasan_record_aux_stack+0x8e/0xa0 [ 36.210192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.210845] remove_vma+0x139/0x170 [ 36.211298] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.211903] do_vmi_munmap+0x1f1/0x2b0 [ 36.212393] __vm_munmap+0x138/0x3a0 [ 36.212854] __x64_sys_munmap+0x59/0x80 [ 36.213344] do_syscall_64+0x3f/0x90 [ 36.213814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.214460] [ 36.214678] The buggy address belongs to the object at ffff88800daf6000 [ 36.214678] which belongs to the cache vm_area_struct of size 168 [ 36.216143] The buggy address is located 88 bytes inside of [ 36.216143] freed 168-byte region [ffff88800daf6000, ffff88800daf60a8) [ 36.217545] [ 36.217765] The buggy address belongs to the physical page: [ 36.218444] page:0000000099b00498 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaf6 [ 36.219568] memcg:ffff88800fc37b01 [ 36.220005] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.220668] page_type: 0xffffffff() [ 36.221127] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.222076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc37b01 [ 36.223026] page dumped because: kasan: bad access detected [ 36.223708] [ 36.223924] Memory state around the buggy address: [ 36.224511] ffff88800daf5f00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.225394] ffff88800daf5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.226279] >ffff88800daf6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.227173] ^ [ 36.227923] ffff88800daf6080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 36.228806] ffff88800daf6100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.229685] ================================================================== [ 36.230850] Disabling lock debugging due to kernel taint [ 38.172608] BUG: Bad rss-counter state mm:00000000a4a022cb type:MM_FILEPAGES val:33 [ 38.173929] BUG: Bad rss-counter state mm:00000000a4a022cb type:MM_ANONPAGES val:22 [ 38.617066] BUG: Bad rss-counter state mm:000000009a2c2188 type:MM_FILEPAGES val:33 [ 38.618241] BUG: Bad rss-counter state mm:000000009a2c2188 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48572' (ECDSA) to the list of known hosts. 2023/06/20 07:02:14 fuzzer started 2023/06/20 07:02:14 dialing manager at localhost:44161 2023/06/20 07:02:14 checking machine... 2023/06/20 07:02:14 checking revisions... [ 39.331546] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:02:15 testing simple program... [ 39.376591] cgroup: Unknown subsys name 'net' [ 39.422602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:02:14 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f3e0b80 RCX=1ffff11001e7c261 RDX=1ffff11001e7c1b6 RSI=0000000000000004 RDI=ffff88800f3e1308 RBP=1ffff110011aaf76 RSP=ffff888008d57b38 R8 =0000000000000001 R9 =ffffed10011aaf55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f3e0d98 R13=0000000000000003 R14=ffff88800f3e0000 R15=ffff88800f3e0b80 RIP=ffffffff8302e573 RFL=00000006 [-----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 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=00007ffc665ba000 CR3=000000001a312000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888014611b40 RCX=1ffff110028c2387 RDX=ffff88806cf395c0 RSI=ffff88806ce395c0 RDI=ffff888014611bc0 RBP=0000000000000008 RSP=ffff88806cf09c50 R8 =ffffffff870a3fe0 R9 =ffffed10028c25e5 R10=ffff888014612f2f R11=0000000000000001 R12=0000000000000001 R13=ffffffff870a3ec0 R14=ffff888014611b54 R15=ffff888014611c38 RIP=ffffffff81267fa4 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=00007f59afebab40 CR3=00000000101e2000 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=a202050283b65a93a04f3c3934d6fc1c XMM02=2c67c8bc2e329bc3000000000011d740 XMM03=fb795ef6d657705600000000001240e0 XMM04=de6507565b11d70e00000000000ae988 XMM05=19e9129bd510f2350000000000133a20 XMM06=4fda316b135da52b00000000001338a8 XMM07=e042d86d42eb936e0000000000124360 XMM08=fe222f64ed9e4c5e000000000011d7a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000