syzkaller login: [ 30.271303] BUG: Bad rss-counter state mm:0000000081128ab6 type:MM_FILEPAGES val:33 [ 30.272290] BUG: Bad rss-counter state mm:0000000081128ab6 type:MM_ANONPAGES val:22 [ 30.442614] ================================================================== [ 30.443531] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.444490] Read of size 8 at addr ffff88801691cc20 by task sshd/219 [ 30.445366] [ 30.445589] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.446459] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.447468] Call Trace: [ 30.447792] [ 30.448077] dump_stack_lvl+0x91/0xf0 [ 30.448573] print_report+0xcc/0x620 [ 30.449064] ? __virt_addr_valid+0x102/0x340 [ 30.449632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.450262] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.450880] kasan_report+0xbe/0xf0 [ 30.451362] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.451986] vma_interval_tree_remove+0xc75/0xec0 [ 30.452592] vma_prepare+0xc54/0x11a0 [ 30.453099] __split_vma+0x5af/0x950 [ 30.453579] ? __pfx___split_vma+0x10/0x10 [ 30.454113] ? find_held_lock+0x2c/0x110 [ 30.454645] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.455216] ? lock_is_held_type+0x9f/0x120 [ 30.455762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.456377] ? mtree_range_walk+0x632/0x900 [ 30.456935] ? mas_walk+0x5c7/0x7c0 [ 30.457429] do_vmi_munmap+0x1f1/0x2b0 [ 30.457926] mmap_region+0x1f9/0x2660 [ 30.458417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.458931] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.459653] ? __pfx_lock_acquire+0x10/0x10 [ 30.460198] ? __pfx_mmap_region+0x10/0x10 [ 30.460732] ? security_mmap_addr+0x7d/0xa0 [ 30.461289] ? get_unmapped_area+0x1f5/0x3f0 [ 30.461842] do_mmap+0x854/0xf00 [ 30.462288] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.462785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.463350] ksys_mmap_pgoff+0x3af/0x500 [ 30.463858] do_syscall_64+0x3f/0x90 [ 30.464341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.464999] RIP: 0033:0x7f5b45122d82 [ 30.465462] 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 [ 30.467662] RSP: 002b:00007ffe8e4e5568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.468578] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b45122d82 [ 30.469437] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b4455c000 [ 30.470293] RBP: 00007f5b4455c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.471191] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e899365f70 [ 30.472043] R13: 00007ffe8e4e5580 R14: 00007ffe8e4e55b0 R15: 00007ffe8e4e5910 [ 30.472907] [ 30.473218] [ 30.473437] Allocated by task 212: [ 30.473864] kasan_save_stack+0x22/0x50 [ 30.474372] kasan_set_track+0x25/0x30 [ 30.474876] __kasan_slab_alloc+0x59/0x70 [ 30.475408] kmem_cache_alloc+0x16b/0x370 [ 30.475925] vm_area_dup+0x20/0x160 [ 30.476379] __split_vma+0x170/0x950 [ 30.476850] split_vma+0xc6/0x110 [ 30.477307] mprotect_fixup+0x8d2/0xb30 [ 30.477806] do_mprotect_pkey+0x87e/0xd40 [ 30.478343] __x64_sys_mprotect+0x78/0xc0 [ 30.478863] do_syscall_64+0x3f/0x90 [ 30.479336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.479979] [ 30.480195] Freed by task 19: [ 30.480585] kasan_save_stack+0x22/0x50 [ 30.481115] kasan_set_track+0x25/0x30 [ 30.481617] kasan_save_free_info+0x2b/0x50 [ 30.482151] __kasan_slab_free+0x10a/0x190 [ 30.482689] kmem_cache_free+0x10d/0x4d0 [ 30.483208] rcu_core+0x8c8/0x2860 [ 30.483657] __do_softirq+0x1b7/0x7d4 [ 30.484137] [ 30.484357] Last potentially related work creation: [ 30.484955] kasan_save_stack+0x22/0x50 [ 30.485470] __kasan_record_aux_stack+0x8e/0xa0 [ 30.486054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.486704] remove_vma+0x139/0x170 [ 30.487156] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.487718] do_vmi_munmap+0x1f1/0x2b0 [ 30.488207] __vm_munmap+0x138/0x3a0 [ 30.488674] __x64_sys_munmap+0x59/0x80 [ 30.489192] do_syscall_64+0x3f/0x90 [ 30.489667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.490327] [ 30.490546] The buggy address belongs to the object at ffff88801691cbc8 [ 30.490546] which belongs to the cache vm_area_struct of size 168 [ 30.492018] The buggy address is located 88 bytes inside of [ 30.492018] freed 168-byte region [ffff88801691cbc8, ffff88801691cc70) [ 30.493436] [ 30.493657] The buggy address belongs to the physical page: [ 30.494319] page:0000000058ccbf6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1691c [ 30.495413] memcg:ffff88801691b001 [ 30.495839] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.496479] page_type: 0xffffffff() [ 30.496936] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.497854] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801691b001 [ 30.498757] page dumped because: kasan: bad access detected [ 30.499421] [ 30.499638] Memory state around the buggy address: [ 30.500226] ffff88801691cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.501099] ffff88801691cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.501978] >ffff88801691cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.502831] ^ [ 30.503366] ffff88801691cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.504227] ffff88801691cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.505103] ================================================================== [ 30.506470] Disabling lock debugging due to kernel taint [ 32.907449] BUG: Bad rss-counter state mm:00000000b95a4354 type:MM_FILEPAGES val:33 [ 32.908461] BUG: Bad rss-counter state mm:00000000b95a4354 type:MM_ANONPAGES val:22 [ 33.449885] BUG: Bad rss-counter state mm:00000000ca419327 type:MM_FILEPAGES val:33 [ 33.451061] BUG: Bad rss-counter state mm:00000000ca419327 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65006' (ECDSA) to the list of known hosts. 2023/06/20 17:24:32 fuzzer started 2023/06/20 17:24:32 dialing manager at localhost:36067 2023/06/20 17:24:32 checking machine... 2023/06/20 17:24:32 checking revisions... [ 34.101306] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:24:32 testing simple program... [ 34.145024] cgroup: Unknown subsys name 'net' [ 34.195976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:24:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000080000000 RSI=000000000000026e RDI=ffff8880159924c0 RBP=ffff888015d89a70 RSP=ffff888016907d88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888015d89b00 R13=ffffffff818cf389 R14=ffff888015d89ab8 R15=ffff88801a8f7980 RIP=ffffffff818cf4f7 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 00007fc638911900 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=00007fc638ec8618 CR3=000000000eee6000 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=563412feff00545000000000000080fe 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=ffff88806cf0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09d01 RSI=ffff88806cf09de0 RDI=ffff88806cf09a88 RBP=ffff88806cf09de0 RSP=ffff88806cf099e0 R8 =ffffffff86139748 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020f03 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09de8 R15=ffff88806cf09a78 RIP=ffffffff811304ce RFL=00000286 [--S--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=00007f230a072460 CR3=000000000c75c000 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=2299134f2381458188405b2c1a3df016 XMM02=2c67c8bc2e329bc3000000000011a388 XMM03=fb795ef6d65770560000000000121d08 XMM04=41976254b8d14bbf00000000000ae988 XMM05=dfcdbad4f1609c370000000000131b68 XMM06=107ba1dc2e79acdb00000000001309d0 XMM07=e042d86d42eb936e0000000000121f88 XMM08=7c04655ac391c3cb000000000011a3e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000