syzkaller login: [ 38.788929] BUG: Bad rss-counter state mm:00000000d20a6f9e type:MM_FILEPAGES val:33 [ 38.790296] BUG: Bad rss-counter state mm:00000000d20a6f9e type:MM_ANONPAGES val:22 [ 38.943303] ================================================================== [ 38.944377] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.945510] Read of size 8 at addr ffff88800c3add08 by task sshd/220 [ 38.946298] [ 38.946513] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.947408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.948403] Call Trace: [ 38.948734] [ 38.949017] dump_stack_lvl+0x91/0xf0 [ 38.949520] print_report+0xcc/0x620 [ 38.950013] ? __virt_addr_valid+0x102/0x340 [ 38.950565] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.951198] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.951837] kasan_report+0xbe/0xf0 [ 38.952324] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.952959] vma_interval_tree_remove+0xc75/0xec0 [ 38.953600] vma_prepare+0xc54/0x11a0 [ 38.954090] __split_vma+0x5af/0x950 [ 38.954567] ? __pfx___split_vma+0x10/0x10 [ 38.955111] ? find_held_lock+0x2c/0x110 [ 38.955654] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.956373] ? lock_is_held_type+0x9f/0x120 [ 38.957062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.957845] ? mtree_range_walk+0x632/0x900 [ 38.958538] ? mas_walk+0x5c7/0x7c0 [ 38.959152] do_vmi_munmap+0x1f1/0x2b0 [ 38.959778] mmap_region+0x1f9/0x2660 [ 38.960402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.961047] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.961847] ? __pfx_lock_acquire+0x10/0x10 [ 38.962383] ? __pfx_mmap_region+0x10/0x10 [ 38.962928] ? security_mmap_addr+0x7d/0xa0 [ 38.963461] ? get_unmapped_area+0x1f5/0x3f0 [ 38.964032] do_mmap+0x854/0xf00 [ 38.964482] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.964990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.965572] ksys_mmap_pgoff+0x3af/0x500 [ 38.966102] do_syscall_64+0x3f/0x90 [ 38.966581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.967244] RIP: 0033:0x7f95873f8d82 [ 38.967716] 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 [ 38.969898] RSP: 002b:00007ffe68147028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.970839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95873f8d82 [ 38.971700] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9586832000 [ 38.972550] RBP: 00007f9586832000 R08: 0000000000000009 R09: 0000000000001000 [ 38.973420] R10: 0000000000000812 R11: 0000000000000206 R12: 000056316878cec0 [ 38.974300] R13: 00007ffe68147040 R14: 00007ffe68147070 R15: 00007ffe681473d0 [ 38.975173] [ 38.975467] [ 38.975700] Allocated by task 212: [ 38.976143] kasan_save_stack+0x22/0x50 [ 38.976653] kasan_set_track+0x25/0x30 [ 38.977164] __kasan_slab_alloc+0x59/0x70 [ 38.977724] kmem_cache_alloc+0x16b/0x370 [ 38.978253] vm_area_dup+0x20/0x160 [ 38.978722] __split_vma+0x170/0x950 [ 38.979189] split_vma+0xc6/0x110 [ 38.979627] mprotect_fixup+0x8d2/0xb30 [ 38.980233] do_mprotect_pkey+0x87e/0xd40 [ 38.980811] __x64_sys_mprotect+0x78/0xc0 [ 38.981392] do_syscall_64+0x3f/0x90 [ 38.981925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.982589] [ 38.982838] Freed by task 212: [ 38.983244] kasan_save_stack+0x22/0x50 [ 38.983791] kasan_set_track+0x25/0x30 [ 38.984431] kasan_save_free_info+0x2b/0x50 [ 38.985019] __kasan_slab_free+0x10a/0x190 [ 38.985575] kmem_cache_free+0x10d/0x4d0 [ 38.986118] rcu_core+0x8c8/0x2860 [ 38.986564] __do_softirq+0x1b7/0x7d4 [ 38.987082] [ 38.987300] Last potentially related work creation: [ 38.987914] kasan_save_stack+0x22/0x50 [ 38.988433] __kasan_record_aux_stack+0x8e/0xa0 [ 38.989028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.989717] remove_vma+0x139/0x170 [ 38.990176] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.990771] do_vmi_munmap+0x1f1/0x2b0 [ 38.991285] __vm_munmap+0x138/0x3a0 [ 38.991767] __x64_sys_munmap+0x59/0x80 [ 38.992270] do_syscall_64+0x3f/0x90 [ 38.992763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.993444] [ 38.993675] The buggy address belongs to the object at ffff88800c3adcb0 [ 38.993675] which belongs to the cache vm_area_struct of size 168 [ 38.995173] The buggy address is located 88 bytes inside of [ 38.995173] freed 168-byte region [ffff88800c3adcb0, ffff88800c3add58) [ 38.996618] [ 38.996852] The buggy address belongs to the physical page: [ 38.997519] page:0000000025b6ae29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc3ad [ 38.998639] memcg:ffff888008cc3901 [ 38.999102] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.999794] page_type: 0xffffffff() [ 39.000251] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.001205] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008cc3901 [ 39.002167] page dumped because: kasan: bad access detected [ 39.002857] [ 39.003073] Memory state around the buggy address: [ 39.003678] ffff88800c3adc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.004568] ffff88800c3adc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.005462] >ffff88800c3add00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.006329] ^ [ 39.006785] ffff88800c3add80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.007651] ffff88800c3ade00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.008519] ================================================================== [ 39.009535] Disabling lock debugging due to kernel taint [ 40.703798] BUG: Bad rss-counter state mm:00000000ee357a86 type:MM_FILEPAGES val:33 [ 40.704978] BUG: Bad rss-counter state mm:00000000ee357a86 type:MM_ANONPAGES val:22 [ 41.063189] BUG: Bad rss-counter state mm:00000000183b78fa type:MM_FILEPAGES val:33 [ 41.063856] BUG: Bad rss-counter state mm:00000000183b78fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18566' (ECDSA) to the list of known hosts. 2023/06/20 13:03:38 fuzzer started 2023/06/20 13:03:38 dialing manager at localhost:36067 2023/06/20 13:03:39 checking machine... 2023/06/20 13:03:39 checking revisions... [ 41.742349] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:03:39 testing simple program... [ 41.803232] cgroup: Unknown subsys name 'net' [ 41.850226] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:03:38 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc6ddeaf88 CR3=0000000005482000 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=00007f76e3e2b510000055d9a1eea790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000003f RBX=00005574455453f0 RCX=00007ffc692be1a8 RDX=00007ffc692be1b0 RSI=0000000000000000 RDI=00005574455453f0 RBP=0000000000000008 RSP=00007ffc692be198 R8 =0000557445525ce0 R9 =00000000ffffffff R10=000055744551feb0 R11=0000000000000000 R12=00005574455453f0 R13=00007ffc692be260 R14=0000557445548480 R15=00007ffc692be260 RIP=00007fcecdc57100 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcecd77b900 00000000 00000000 GS =0000 0000000000000000 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=00007fcecdd330b0 CR3=000000000c700000 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=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