syzkaller login: [ 32.601444] BUG: Bad rss-counter state mm:000000001c731c96 type:MM_FILEPAGES val:33 [ 32.603027] BUG: Bad rss-counter state mm:000000001c731c96 type:MM_ANONPAGES val:22 [ 32.766511] ================================================================== [ 32.767418] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.768392] Read of size 8 at addr ffff88800f0f33f8 by task sshd/222 [ 32.769262] [ 32.769489] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.770352] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.771353] Call Trace: [ 32.771674] [ 32.771979] dump_stack_lvl+0x91/0xf0 [ 32.772470] print_report+0xcc/0x620 [ 32.772956] ? __virt_addr_valid+0x102/0x340 [ 32.773505] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.774126] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.774747] kasan_report+0xbe/0xf0 [ 32.775220] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.775861] vma_interval_tree_remove+0xc75/0xec0 [ 32.776467] vma_prepare+0xc54/0x11a0 [ 32.776948] __split_vma+0x5af/0x950 [ 32.777419] ? __pfx___split_vma+0x10/0x10 [ 32.777945] ? find_held_lock+0x2c/0x110 [ 32.778471] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.779031] ? lock_is_held_type+0x9f/0x120 [ 32.779574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.780194] ? mtree_range_walk+0x632/0x900 [ 32.780742] ? mas_walk+0x5c7/0x7c0 [ 32.781216] do_vmi_munmap+0x1f1/0x2b0 [ 32.781714] mmap_region+0x1f9/0x2660 [ 32.782195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.782706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.783426] ? __pfx_lock_acquire+0x10/0x10 [ 32.783976] ? __pfx_mmap_region+0x10/0x10 [ 32.784505] ? security_mmap_addr+0x7d/0xa0 [ 32.785030] ? get_unmapped_area+0x1f5/0x3f0 [ 32.785581] do_mmap+0x854/0xf00 [ 32.786024] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.786515] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.787079] ksys_mmap_pgoff+0x3af/0x500 [ 32.787589] do_syscall_64+0x3f/0x90 [ 32.788076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.788727] RIP: 0033:0x7f4cf8339d82 [ 32.789186] 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 [ 32.791312] RSP: 002b:00007ffefe503098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.792261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cf8339d82 [ 32.793117] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cf7773000 [ 32.793969] RBP: 00007f4cf7773000 R08: 0000000000000009 R09: 0000000000001000 [ 32.794813] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609d31eed90 [ 32.795665] R13: 00007ffefe5030b0 R14: 00007ffefe5030e0 R15: 00007ffefe503440 [ 32.796554] [ 32.796846] [ 32.797064] Allocated by task 215: [ 32.797494] kasan_save_stack+0x22/0x50 [ 32.798001] kasan_set_track+0x25/0x30 [ 32.798495] __kasan_slab_alloc+0x59/0x70 [ 32.799019] kmem_cache_alloc+0x16b/0x370 [ 32.799534] vm_area_dup+0x20/0x160 [ 32.799996] __split_vma+0x170/0x950 [ 32.800467] split_vma+0xc6/0x110 [ 32.800907] mprotect_fixup+0x8d2/0xb30 [ 32.801411] do_mprotect_pkey+0x87e/0xd40 [ 32.801937] __x64_sys_mprotect+0x78/0xc0 [ 32.802462] do_syscall_64+0x3f/0x90 [ 32.802941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.803585] [ 32.803798] Freed by task 215: [ 32.804215] kasan_save_stack+0x22/0x50 [ 32.804718] kasan_set_track+0x25/0x30 [ 32.805215] kasan_save_free_info+0x2b/0x50 [ 32.805753] __kasan_slab_free+0x10a/0x190 [ 32.806289] kmem_cache_free+0x10d/0x4d0 [ 32.806806] rcu_core+0x8c8/0x2860 [ 32.807246] __do_softirq+0x1b7/0x7d4 [ 32.807720] [ 32.807943] Last potentially related work creation: [ 32.808535] kasan_save_stack+0x22/0x50 [ 32.809038] __kasan_record_aux_stack+0x8e/0xa0 [ 32.809616] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.810264] remove_vma+0x139/0x170 [ 32.810711] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.811269] do_vmi_munmap+0x1f1/0x2b0 [ 32.811751] __vm_munmap+0x138/0x3a0 [ 32.812229] __x64_sys_munmap+0x59/0x80 [ 32.812723] do_syscall_64+0x3f/0x90 [ 32.813196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.813841] [ 32.814056] The buggy address belongs to the object at ffff88800f0f33a0 [ 32.814056] which belongs to the cache vm_area_struct of size 168 [ 32.815524] The buggy address is located 88 bytes inside of [ 32.815524] freed 168-byte region [ffff88800f0f33a0, ffff88800f0f3448) [ 32.816956] [ 32.817171] The buggy address belongs to the physical page: [ 32.817834] page:000000006edc6901 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0f3 [ 32.818924] memcg:ffff88800f290b01 [ 32.819350] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.820006] page_type: 0xffffffff() [ 32.820458] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.821386] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f290b01 [ 32.822304] page dumped because: kasan: bad access detected [ 32.822964] [ 32.823178] Memory state around the buggy address: [ 32.823757] ffff88800f0f3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.824618] ffff88800f0f3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.825477] >ffff88800f0f3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.826335] ^ [ 32.827186] ffff88800f0f3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.828063] ffff88800f0f3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.828921] ================================================================== [ 32.830166] Disabling lock debugging due to kernel taint [ 34.701975] BUG: Bad rss-counter state mm:000000001ad51fa2 type:MM_FILEPAGES val:33 [ 34.702890] BUG: Bad rss-counter state mm:000000001ad51fa2 type:MM_ANONPAGES val:22 [ 35.190402] BUG: Bad rss-counter state mm:0000000058dfa3c3 type:MM_FILEPAGES val:33 [ 35.191539] BUG: Bad rss-counter state mm:0000000058dfa3c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17495' (ECDSA) to the list of known hosts. 2023/06/20 08:25:25 fuzzer started 2023/06/20 08:25:25 dialing manager at localhost:44161 2023/06/20 08:25:25 checking machine... 2023/06/20 08:25:25 checking revisions... [ 35.995674] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:25:25 testing simple program... [ 36.040865] cgroup: Unknown subsys name 'net' [ 36.102532] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:25:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8609fb04 RDX=1ffff1100d9c1353 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff8609fb08 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ff8 R15=ffff88806ce09a98 RIP=ffffffff81131271 RFL=00000216 [----AP-] 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=00007fc2462ebd50 CR3=0000000013f50000 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=9209435d6cbefe8b1644cc6a9e01e713 XMM02=000000000011c870eff9b2d0a8fce9cb XMM03=000000000011c9402c67c8bc2e329bc3 XMM04=8c1d60fe31ac684a00000000000ae988 XMM05=731680e021e14e690000000000134e50 XMM06=00c3ffa147b8d8570000000000133ef0 XMM07=e042d86d42eb936e0000000000124770 XMM08=d05abb1a5995ff78000000000011c940 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801584f8c8 RCX=0000000000000000 RDX=ffff88800ef10000 RSI=ffffffff838736e1 RDI=ffffffff85ba4a00 RBP=ffff888015bb3000 RSP=ffff88801584f778 R8 =0000000000000001 R9 =ffffed1002b76642 R10=ffff888015bb3213 R11=00000000000b6996 R12=0000000000000000 R13=1ffff11002b09ef3 R14=ffff88800fd00a00 R15=ffff888015bb3238 RIP=ffffffff814c081b 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 00007fa1de87f900 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=00007ffed4f85000 CR3=000000000d9b2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000