syzkaller login: [ 38.904500] BUG: Bad rss-counter state mm:0000000074fe3f32 type:MM_FILEPAGES val:33 [ 38.905659] BUG: Bad rss-counter state mm:0000000074fe3f32 type:MM_ANONPAGES val:22 [ 39.070789] ================================================================== [ 39.071660] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.072550] Read of size 8 at addr ffff88800caa0968 by task sshd/219 [ 39.073276] [ 39.073591] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.074403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.075319] Call Trace: [ 39.075624] [ 39.075895] dump_stack_lvl+0x91/0xf0 [ 39.076355] print_report+0xcc/0x620 [ 39.076837] ? __virt_addr_valid+0x102/0x340 [ 39.077356] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.077940] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.078520] kasan_report+0xbe/0xf0 [ 39.078972] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.079558] vma_interval_tree_remove+0xc75/0xec0 [ 39.080119] vma_prepare+0xc54/0x11a0 [ 39.080585] __split_vma+0x5af/0x950 [ 39.081032] ? __pfx___split_vma+0x10/0x10 [ 39.081533] ? find_held_lock+0x2c/0x110 [ 39.082024] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.082559] ? lock_is_held_type+0x9f/0x120 [ 39.083072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.083644] ? mtree_range_walk+0x632/0x900 [ 39.084166] ? mas_walk+0x5c7/0x7c0 [ 39.084628] do_vmi_munmap+0x1f1/0x2b0 [ 39.085094] mmap_region+0x1f9/0x2660 [ 39.085553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.086035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.086709] ? __pfx_lock_acquire+0x10/0x10 [ 39.087225] ? __pfx_mmap_region+0x10/0x10 [ 39.087726] ? security_mmap_addr+0x7d/0xa0 [ 39.088225] ? get_unmapped_area+0x1f5/0x3f0 [ 39.088766] do_mmap+0x854/0xf00 [ 39.089180] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.089647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.090177] ksys_mmap_pgoff+0x3af/0x500 [ 39.090661] do_syscall_64+0x3f/0x90 [ 39.091113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.091724] RIP: 0033:0x7f48298fad82 [ 39.092153] 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 [ 39.094150] RSP: 002b:00007ffeddc893f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.095001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48298fad82 [ 39.095796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4828d34000 [ 39.096611] RBP: 00007f4828d34000 R08: 0000000000000009 R09: 0000000000001000 [ 39.097402] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602742fcd90 [ 39.098193] R13: 00007ffeddc89410 R14: 00007ffeddc89440 R15: 00007ffeddc897a0 [ 39.098997] [ 39.099276] [ 39.099481] Allocated by task 212: [ 39.099883] kasan_save_stack+0x22/0x50 [ 39.100360] kasan_set_track+0x25/0x30 [ 39.100841] __kasan_slab_alloc+0x59/0x70 [ 39.101334] kmem_cache_alloc+0x16b/0x370 [ 39.101819] vm_area_dup+0x20/0x160 [ 39.102247] __split_vma+0x170/0x950 [ 39.102686] split_vma+0xc6/0x110 [ 39.103098] mprotect_fixup+0x8d2/0xb30 [ 39.103569] do_mprotect_pkey+0x87e/0xd40 [ 39.104060] __x64_sys_mprotect+0x78/0xc0 [ 39.104578] do_syscall_64+0x3f/0x90 [ 39.105025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.105628] [ 39.105834] Freed by task 212: [ 39.106206] kasan_save_stack+0x22/0x50 [ 39.106686] kasan_set_track+0x25/0x30 [ 39.107152] kasan_save_free_info+0x2b/0x50 [ 39.107660] __kasan_slab_free+0x10a/0x190 [ 39.108163] kmem_cache_free+0x10d/0x4d0 [ 39.108655] rcu_core+0x8c8/0x2860 [ 39.109071] __do_softirq+0x1b7/0x7d4 [ 39.109527] [ 39.109731] Last potentially related work creation: [ 39.110277] kasan_save_stack+0x22/0x50 [ 39.110753] __kasan_record_aux_stack+0x8e/0xa0 [ 39.111290] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.111895] remove_vma+0x139/0x170 [ 39.112318] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.112860] do_vmi_munmap+0x1f1/0x2b0 [ 39.113321] __vm_munmap+0x138/0x3a0 [ 39.113767] __x64_sys_munmap+0x59/0x80 [ 39.114236] do_syscall_64+0x3f/0x90 [ 39.114688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.115381] [ 39.115586] The buggy address belongs to the object at ffff88800caa0910 [ 39.115586] which belongs to the cache vm_area_struct of size 168 [ 39.116973] The buggy address is located 88 bytes inside of [ 39.116973] freed 168-byte region [ffff88800caa0910, ffff88800caa09b8) [ 39.118298] [ 39.118504] The buggy address belongs to the physical page: [ 39.119123] page:00000000aa3fecf2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcaa0 [ 39.120137] memcg:ffff88800e8de301 [ 39.120552] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.121215] page_type: 0xffffffff() [ 39.121649] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384fc0 dead000000000005 [ 39.122532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8de301 [ 39.123436] page dumped because: kasan: bad access detected [ 39.124094] [ 39.124313] Memory state around the buggy address: [ 39.124940] ffff88800caa0800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.125802] ffff88800caa0880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.126659] >ffff88800caa0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.127517] ^ [ 39.128296] ffff88800caa0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.129163] ffff88800caa0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.130025] ================================================================== [ 39.130941] Disabling lock debugging due to kernel taint [ 41.528454] BUG: Bad rss-counter state mm:0000000041eb4fc1 type:MM_FILEPAGES val:33 [ 41.529615] BUG: Bad rss-counter state mm:0000000041eb4fc1 type:MM_ANONPAGES val:22 [ 41.902701] BUG: Bad rss-counter state mm:00000000e7293f8a type:MM_FILEPAGES val:33 [ 41.903670] BUG: Bad rss-counter state mm:00000000e7293f8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61895' (ECDSA) to the list of known hosts. 2023/06/20 16:36:44 fuzzer started 2023/06/20 16:36:45 dialing manager at localhost:36067 2023/06/20 16:36:45 checking machine... 2023/06/20 16:36:45 checking revisions... [ 42.621229] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:36:45 testing simple program... [ 42.668071] cgroup: Unknown subsys name 'net' [ 42.706270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:36:44 Registers: info registers vcpu 0 RAX=1ffff11001a54769 RBX=ffff88800d2a3b18 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d2a3b48 RBP=ffff8880160193e0 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =ffffed100d9c13a9 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888015c41c80 R14=ffffffff811f7e84 R15=ffff88800dc17c00 RIP=ffffffff818464e2 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 00007f167d4bb900 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=00007f167da72618 CR3=00000000191dc000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f5cd8ddf220 CR3=000000000c72e000 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=6391ee0af49164ac3a42d859916a8a6b XMM02=000000000011b140ec2efd57dc4c00df XMM03=0000000000121ae082720ca7312e5f40 XMM04=bd3efcb1c3c85fa300000000000ae988 XMM05=dfcdbad4f1609c370000000000131600 XMM06=5ba551e3c9c31b8b00000000001307d8 XMM07=e042d86d42eb936e0000000000121db8 XMM08=82720ca7312e5f40000000000011b1a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000