syzkaller login: [ 32.248022] BUG: Bad rss-counter state mm:00000000bcf4bbdc type:MM_FILEPAGES val:33 [ 32.248766] BUG: Bad rss-counter state mm:00000000bcf4bbdc type:MM_ANONPAGES val:22 [ 32.278707] ================================================================== [ 32.279486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.280257] Read of size 8 at addr ffff888019c1e798 by task sshd/222 [ 32.280890] [ 32.281069] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.281741] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.282535] Call Trace: [ 32.282850] [ 32.283071] dump_stack_lvl+0x91/0xf0 [ 32.283574] print_report+0xcc/0x620 [ 32.283937] ? __virt_addr_valid+0x102/0x340 [ 32.284362] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.284893] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.285416] kasan_report+0xbe/0xf0 [ 32.285827] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.286307] vma_interval_tree_remove+0xc75/0xec0 [ 32.286733] vma_prepare+0xc54/0x11a0 [ 32.287212] __split_vma+0x5af/0x950 [ 32.287575] ? __pfx___split_vma+0x10/0x10 [ 32.287971] ? find_held_lock+0x2c/0x110 [ 32.288367] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.288862] ? lock_is_held_type+0x9f/0x120 [ 32.289303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.289745] ? mtree_range_walk+0x632/0x900 [ 32.290196] ? mas_walk+0x5c7/0x7c0 [ 32.290581] do_vmi_munmap+0x1f1/0x2b0 [ 32.290967] mmap_region+0x1f9/0x2660 [ 32.291370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.291757] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.292307] ? __pfx_lock_acquire+0x10/0x10 [ 32.292758] ? __pfx_mmap_region+0x10/0x10 [ 32.293255] ? security_mmap_addr+0x7d/0xa0 [ 32.293634] ? get_unmapped_area+0x1f5/0x3f0 [ 32.294002] do_mmap+0x854/0xf00 [ 32.294283] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.294612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.295021] ksys_mmap_pgoff+0x3af/0x500 [ 32.295382] do_syscall_64+0x3f/0x90 [ 32.295710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.296184] RIP: 0033:0x7f13bfe4ed82 [ 32.296505] 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 [ 32.297951] RSP: 002b:00007ffe8e799d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.298584] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f13bfe4ed82 [ 32.299108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f13bf288000 [ 32.299719] RBP: 00007f13bf288000 R08: 0000000000000009 R09: 0000000000001000 [ 32.300353] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d419d28ec0 [ 32.300981] R13: 00007ffe8e799da0 R14: 00007ffe8e799dd0 R15: 00007ffe8e79a130 [ 32.301567] [ 32.301764] [ 32.301912] Allocated by task 215: [ 32.302202] kasan_save_stack+0x22/0x50 [ 32.302557] kasan_set_track+0x25/0x30 [ 32.302894] __kasan_slab_alloc+0x59/0x70 [ 32.303218] kmem_cache_alloc+0x16b/0x370 [ 32.303557] vm_area_dup+0x20/0x160 [ 32.303878] __split_vma+0x170/0x950 [ 32.304216] split_vma+0xc6/0x110 [ 32.304522] mprotect_fixup+0x8d2/0xb30 [ 32.304879] do_mprotect_pkey+0x87e/0xd40 [ 32.305230] __x64_sys_mprotect+0x78/0xc0 [ 32.305555] do_syscall_64+0x3f/0x90 [ 32.305856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.306287] [ 32.306433] Freed by task 204: [ 32.306694] kasan_save_stack+0x22/0x50 [ 32.307031] kasan_set_track+0x25/0x30 [ 32.307356] kasan_save_free_info+0x2b/0x50 [ 32.307707] __kasan_slab_free+0x10a/0x190 [ 32.308056] kmem_cache_free+0x10d/0x4d0 [ 32.308447] rcu_core+0x8c8/0x2860 [ 32.308742] __do_softirq+0x1b7/0x7d4 [ 32.309055] [ 32.309195] Last potentially related work creation: [ 32.309577] kasan_save_stack+0x22/0x50 [ 32.309916] __kasan_record_aux_stack+0x8e/0xa0 [ 32.310294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.310712] remove_vma+0x139/0x170 [ 32.311014] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.311379] do_vmi_munmap+0x1f1/0x2b0 [ 32.311699] __vm_munmap+0x138/0x3a0 [ 32.312016] __x64_sys_munmap+0x59/0x80 [ 32.312370] do_syscall_64+0x3f/0x90 [ 32.312677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.313097] [ 32.313235] The buggy address belongs to the object at ffff888019c1e740 [ 32.313235] which belongs to the cache vm_area_struct of size 168 [ 32.314161] The buggy address is located 88 bytes inside of [ 32.314161] freed 168-byte region [ffff888019c1e740, ffff888019c1e7e8) [ 32.315040] [ 32.315179] The buggy address belongs to the physical page: [ 32.315598] page:0000000034d002a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c1e [ 32.316343] memcg:ffff88800d9e6201 [ 32.316616] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.317057] page_type: 0xffffffff() [ 32.317372] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.318116] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9e6201 [ 32.318807] page dumped because: kasan: bad access detected [ 32.319319] [ 32.319463] Memory state around the buggy address: [ 32.319883] ffff888019c1e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.320493] ffff888019c1e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.321114] >ffff888019c1e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.321674] ^ [ 32.322002] ffff888019c1e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.322597] ffff888019c1e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.323200] ================================================================== [ 32.323977] Disabling lock debugging due to kernel taint [ 34.276350] BUG: Bad rss-counter state mm:00000000df9c6f84 type:MM_FILEPAGES val:33 [ 34.277161] BUG: Bad rss-counter state mm:00000000df9c6f84 type:MM_ANONPAGES val:22 [ 34.645150] BUG: Bad rss-counter state mm:00000000b8964f58 type:MM_FILEPAGES val:33 [ 34.645916] BUG: Bad rss-counter state mm:00000000b8964f58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47738' (ECDSA) to the list of known hosts. 2023/06/20 08:57:52 fuzzer started 2023/06/20 08:57:52 dialing manager at localhost:44161 2023/06/20 08:57:52 checking machine... 2023/06/20 08:57:52 checking revisions... [ 35.218518] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:57:52 testing simple program... [ 35.249852] cgroup: Unknown subsys name 'net' [ 35.323776] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ff4c8daecb0 CR3=000000000c76e000 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=e914ab64c33b168a5349087fa5d8b41f XMM02=2c67c8bc2e329bc3000000000011d1c8 XMM03=fb795ef6d65770560000000000124740 XMM04=b63ad284dc4b81cc00000000000ae988 XMM05=59d5b690e0af863b0000000000134228 XMM06=2be25430ed0f50c00000000000133090 XMM07=e042d86d42eb936e00000000001249c0 XMM08=0065531d74defb23000000000011d228 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff8452fffc RSP=ffff88800fb473a8 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000007 R13=0000000000000000 R14=0000000000002800 R15=0000000000000000 RIP=ffffffff81534240 RFL=00000002 [-------] 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 00007feb0cfba900 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=00007feb0cf99020 CR3=00000000181ce000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000