syzkaller login: [ 31.413263] BUG: Bad rss-counter state mm:00000000f3b00b26 type:MM_FILEPAGES val:33 [ 31.414064] BUG: Bad rss-counter state mm:00000000f3b00b26 type:MM_ANONPAGES val:22 [ 31.444043] ================================================================== [ 31.444752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.445524] Read of size 8 at addr ffff88800999bdf0 by task sshd/220 [ 31.446221] [ 31.446450] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.447177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.448014] Call Trace: [ 31.448248] [ 31.448454] dump_stack_lvl+0x91/0xf0 [ 31.448872] print_report+0xcc/0x620 [ 31.449286] ? __virt_addr_valid+0x102/0x340 [ 31.449873] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.450389] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.450832] kasan_report+0xbe/0xf0 [ 31.451177] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.451625] vma_interval_tree_remove+0xc75/0xec0 [ 31.452059] vma_prepare+0xc54/0x11a0 [ 31.452423] __split_vma+0x5af/0x950 [ 31.452770] ? __pfx___split_vma+0x10/0x10 [ 31.453154] ? find_held_lock+0x2c/0x110 [ 31.453557] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.453969] ? lock_is_held_type+0x9f/0x120 [ 31.454369] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.454810] ? mtree_range_walk+0x632/0x900 [ 31.455218] ? mas_walk+0x5c7/0x7c0 [ 31.455557] do_vmi_munmap+0x1f1/0x2b0 [ 31.455912] mmap_region+0x1f9/0x2660 [ 31.456509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.456935] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.457450] ? __pfx_lock_acquire+0x10/0x10 [ 31.457891] ? __pfx_mmap_region+0x10/0x10 [ 31.458280] ? security_mmap_addr+0x7d/0xa0 [ 31.458695] ? get_unmapped_area+0x1f5/0x3f0 [ 31.459097] do_mmap+0x854/0xf00 [ 31.459407] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.459755] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.460182] ksys_mmap_pgoff+0x3af/0x500 [ 31.460555] do_syscall_64+0x3f/0x90 [ 31.460892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.461344] RIP: 0033:0x7ffb8e069d82 [ 31.461688] 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 [ 31.463251] RSP: 002b:00007fff4224dfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.463901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb8e069d82 [ 31.464511] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb8d4a3000 [ 31.465233] RBP: 00007ffb8d4a3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.465864] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6ddb9fb20 [ 31.466445] R13: 00007fff4224e000 R14: 00007fff4224e030 R15: 00007fff4224e390 [ 31.467085] [ 31.467293] [ 31.467445] Allocated by task 213: [ 31.467746] kasan_save_stack+0x22/0x50 [ 31.468100] kasan_set_track+0x25/0x30 [ 31.468447] __kasan_slab_alloc+0x59/0x70 [ 31.468823] kmem_cache_alloc+0x16b/0x370 [ 31.469178] vm_area_dup+0x20/0x160 [ 31.469533] __split_vma+0x170/0x950 [ 31.469858] split_vma+0xc6/0x110 [ 31.470155] mprotect_fixup+0x8d2/0xb30 [ 31.470503] do_mprotect_pkey+0x87e/0xd40 [ 31.470871] __x64_sys_mprotect+0x78/0xc0 [ 31.471236] do_syscall_64+0x3f/0x90 [ 31.471574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.472031] [ 31.472185] Freed by task 213: [ 31.472466] kasan_save_stack+0x22/0x50 [ 31.472813] kasan_set_track+0x25/0x30 [ 31.473154] kasan_save_free_info+0x2b/0x50 [ 31.473547] __kasan_slab_free+0x10a/0x190 [ 31.473917] kmem_cache_free+0x10d/0x4d0 [ 31.474268] rcu_core+0x8c8/0x2860 [ 31.474578] __do_softirq+0x1b7/0x7d4 [ 31.474916] [ 31.475071] Last potentially related work creation: [ 31.475481] kasan_save_stack+0x22/0x50 [ 31.475834] __kasan_record_aux_stack+0x8e/0xa0 [ 31.476227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.476683] remove_vma+0x139/0x170 [ 31.476999] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.477393] do_vmi_munmap+0x1f1/0x2b0 [ 31.477754] __vm_munmap+0x138/0x3a0 [ 31.478085] __x64_sys_munmap+0x59/0x80 [ 31.478434] do_syscall_64+0x3f/0x90 [ 31.478768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.479213] [ 31.479366] The buggy address belongs to the object at ffff88800999bd98 [ 31.479366] which belongs to the cache vm_area_struct of size 168 [ 31.480393] The buggy address is located 88 bytes inside of [ 31.480393] freed 168-byte region [ffff88800999bd98, ffff88800999be40) [ 31.481367] [ 31.481547] The buggy address belongs to the physical page: [ 31.482003] page:00000000dcf04b9d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x999b [ 31.482740] memcg:ffff88800ed43101 [ 31.483046] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.483495] page_type: 0xffffffff() [ 31.483814] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.484454] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed43101 [ 31.485088] page dumped because: kasan: bad access detected [ 31.485566] [ 31.485717] Memory state around the buggy address: [ 31.486110] ffff88800999bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.486707] ffff88800999bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.487315] >ffff88800999bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.487916] ^ [ 31.488475] ffff88800999be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.489073] ffff88800999be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.489680] ================================================================== [ 31.490445] Disabling lock debugging due to kernel taint [ 33.022054] BUG: Bad rss-counter state mm:0000000063d8fc7c type:MM_FILEPAGES val:33 [ 33.023294] BUG: Bad rss-counter state mm:0000000063d8fc7c type:MM_ANONPAGES val:22 [ 33.456735] BUG: Bad rss-counter state mm:00000000f2dca126 type:MM_FILEPAGES val:33 [ 33.457554] BUG: Bad rss-counter state mm:00000000f2dca126 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46331' (ECDSA) to the list of known hosts. 2023/06/21 09:10:08 fuzzer started 2023/06/21 09:10:08 dialing manager at localhost:36067 2023/06/21 09:10:08 checking machine... 2023/06/21 09:10:08 checking revisions... [ 33.971203] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:10:08 testing simple program... [ 34.008044] cgroup: Unknown subsys name 'net' [ 34.041041] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:10:08 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016a673a0 RCX=0000000000000000 RDX=1ffffffff0ba7c92 RSI=0000000000000000 RDI=ffffffff87f956e0 RBP=ffff888016a673b8 RSP=ffff8880102ffcc8 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87f956e0 R13=0000000000000000 R14=ffffffff87b6a200 R15=0000000000000001 RIP=ffffffff812db5c9 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 00007f5c55ab7900 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=00007ffc54e10000 CR3=000000000f836000 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=0000000000000000 RBX=ffffed100d9e1368 RCX=0000000000000000 RDX=ffff888008d951c0 RSI=ffff88806cf09b60 RDI=ffffffff813ad470 RBP=ffffffff813782f8 RSP=ffff88806cf09b38 R8 =0000000000000130 R9 =0000000000000000 R10=ffffed1001d8d1c8 R11=0000000000000000 R12=0000000000000000 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800ec68ec0 RIP=ffffffff810bcfd4 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 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=00007fed61e66000 CR3=000000000d9c4000 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=2038303a30313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a30313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000