syzkaller login: [ 33.980080] BUG: Bad rss-counter state mm:000000000b525a22 type:MM_FILEPAGES val:33 [ 33.981285] BUG: Bad rss-counter state mm:000000000b525a22 type:MM_ANONPAGES val:22 [ 34.022934] ================================================================== [ 34.023935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.024937] Read of size 8 at addr ffff88800ff5d968 by task sshd/220 [ 34.025850] [ 34.026109] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.027081] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.028131] Call Trace: [ 34.028519] [ 34.028816] dump_stack_lvl+0x91/0xf0 [ 34.029351] print_report+0xcc/0x620 [ 34.029831] ? __virt_addr_valid+0x102/0x340 [ 34.030518] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.031137] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.031751] kasan_report+0xbe/0xf0 [ 34.032221] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.032841] vma_interval_tree_remove+0xc75/0xec0 [ 34.033437] vma_prepare+0xc54/0x11a0 [ 34.033914] __split_vma+0x5af/0x950 [ 34.034380] ? __pfx___split_vma+0x10/0x10 [ 34.034943] ? find_held_lock+0x2c/0x110 [ 34.035456] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.036028] ? lock_is_held_type+0x9f/0x120 [ 34.036558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.037161] ? mtree_range_walk+0x632/0x900 [ 34.037711] ? mas_walk+0x5c7/0x7c0 [ 34.038185] do_vmi_munmap+0x1f1/0x2b0 [ 34.038681] mmap_region+0x1f9/0x2660 [ 34.039158] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.039670] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.040401] ? __pfx_lock_acquire+0x10/0x10 [ 34.040929] ? __pfx_mmap_region+0x10/0x10 [ 34.041470] ? security_mmap_addr+0x7d/0xa0 [ 34.041998] ? get_unmapped_area+0x1f5/0x3f0 [ 34.042545] do_mmap+0x854/0xf00 [ 34.043015] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.043516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.044049] ksys_mmap_pgoff+0x3af/0x500 [ 34.044529] do_syscall_64+0x3f/0x90 [ 34.044988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.045628] RIP: 0033:0x7fba3721cd82 [ 34.046080] 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 [ 34.048214] RSP: 002b:00007ffe04dff438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.049113] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba3721cd82 [ 34.049972] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba36656000 [ 34.050893] RBP: 00007fba36656000 R08: 0000000000000009 R09: 0000000000001000 [ 34.051699] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b6e191ec0 [ 34.052500] R13: 00007ffe04dff450 R14: 00007ffe04dff480 R15: 00007ffe04dff7e0 [ 34.053353] [ 34.053628] [ 34.053830] Allocated by task 213: [ 34.054234] kasan_save_stack+0x22/0x50 [ 34.054727] kasan_set_track+0x25/0x30 [ 34.055195] __kasan_slab_alloc+0x59/0x70 [ 34.055748] kmem_cache_alloc+0x16b/0x370 [ 34.056260] vm_area_dup+0x20/0x160 [ 34.056718] __split_vma+0x170/0x950 [ 34.057186] split_vma+0xc6/0x110 [ 34.057633] mprotect_fixup+0x8d2/0xb30 [ 34.058143] do_mprotect_pkey+0x87e/0xd40 [ 34.058678] __x64_sys_mprotect+0x78/0xc0 [ 34.059204] do_syscall_64+0x3f/0x90 [ 34.059687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.060337] [ 34.060556] Freed by task 213: [ 34.060966] kasan_save_stack+0x22/0x50 [ 34.061467] kasan_set_track+0x25/0x30 [ 34.061974] kasan_save_free_info+0x2b/0x50 [ 34.062497] __kasan_slab_free+0x10a/0x190 [ 34.063231] kmem_cache_free+0x10d/0x4d0 [ 34.063870] rcu_core+0x8c8/0x2860 [ 34.064450] __do_softirq+0x1b7/0x7d4 [ 34.065050] [ 34.065316] Last potentially related work creation: [ 34.066034] kasan_save_stack+0x22/0x50 [ 34.066676] __kasan_record_aux_stack+0x8e/0xa0 [ 34.067397] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.068209] remove_vma+0x139/0x170 [ 34.068765] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.069422] do_vmi_munmap+0x1f1/0x2b0 [ 34.069996] __vm_munmap+0x138/0x3a0 [ 34.070552] __x64_sys_munmap+0x59/0x80 [ 34.071167] do_syscall_64+0x3f/0x90 [ 34.071707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.072345] [ 34.072560] The buggy address belongs to the object at ffff88800ff5d910 [ 34.072560] which belongs to the cache vm_area_struct of size 168 [ 34.074010] The buggy address is located 88 bytes inside of [ 34.074010] freed 168-byte region [ffff88800ff5d910, ffff88800ff5d9b8) [ 34.075393] [ 34.075611] The buggy address belongs to the physical page: [ 34.076272] page:00000000fb2d9a79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff5d [ 34.077358] memcg:ffff88800dfede01 [ 34.077778] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.078431] page_type: 0xffffffff() [ 34.078889] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.079818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfede01 [ 34.080721] page dumped because: kasan: bad access detected [ 34.081383] [ 34.081598] Memory state around the buggy address: [ 34.082224] ffff88800ff5d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.083095] ffff88800ff5d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.083946] >ffff88800ff5d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.084794] ^ [ 34.085570] ffff88800ff5d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.086423] ffff88800ff5da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.087279] ================================================================== [ 34.088235] Disabling lock debugging due to kernel taint [ 36.352928] BUG: Bad rss-counter state mm:000000005e6089f8 type:MM_FILEPAGES val:33 [ 36.354103] BUG: Bad rss-counter state mm:000000005e6089f8 type:MM_ANONPAGES val:22 [ 36.808699] BUG: Bad rss-counter state mm:00000000b5cea5ac type:MM_FILEPAGES val:33 [ 36.809875] BUG: Bad rss-counter state mm:00000000b5cea5ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3279' (ECDSA) to the list of known hosts. 2023/06/19 14:11:52 fuzzer started 2023/06/19 14:11:53 dialing manager at localhost:44161 2023/06/19 14:11:53 checking machine... 2023/06/19 14:11:53 checking revisions... [ 37.489670] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:11:53 testing simple program... [ 37.541717] cgroup: Unknown subsys name 'net' [ 37.598069] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:11:49 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff88800fca76e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008fce000 R13=0000000000000000 R14=00000000000128c0 R15=00000000000128c0 RIP=ffffffff81534263 RFL=00000047 [---Z-PC] 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 00007f65e5425900 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=00007f65e59dc618 CR3=000000000edcc000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f3d39f8eb10 CR3=000000001458a000 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=e89ce4567f8fc592a640b42ff1438827 XMM02=2c67c8bc2e329bc3000000000011fea0 XMM03=fb795ef6d65770560000000000124640 XMM04=ad9549f03a273eb800000000000ae988 XMM05=19e9129bd510f23500000000001341e8 XMM06=e9f5f96af7d77e2f0000000000133050 XMM07=e042d86d42eb936e00000000001248c0 XMM08=08f0a758e15574dd000000000011ff00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000