syzkaller login: [ 38.832913] BUG: Bad rss-counter state mm:00000000aa79c742 type:MM_FILEPAGES val:33 [ 38.834576] BUG: Bad rss-counter state mm:00000000aa79c742 type:MM_ANONPAGES val:22 [ 39.006457] ================================================================== [ 39.007485] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.008517] Read of size 8 at addr ffff88800d93c058 by task sshd/219 [ 39.009552] [ 39.009795] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.010737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.011861] Call Trace: [ 39.012221] <TASK> [ 39.012553] dump_stack_lvl+0x91/0xf0 [ 39.013105] print_report+0xcc/0x620 [ 39.013653] ? __virt_addr_valid+0x102/0x340 [ 39.014278] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.014980] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.015685] kasan_report+0xbe/0xf0 [ 39.016223] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.016946] vma_interval_tree_remove+0xc75/0xec0 [ 39.017634] vma_prepare+0xc54/0x11a0 [ 39.018185] __split_vma+0x5af/0x950 [ 39.018715] ? __pfx___split_vma+0x10/0x10 [ 39.019313] ? find_held_lock+0x2c/0x110 [ 39.019937] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.020719] ? lock_is_held_type+0x9f/0x120 [ 39.021341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.022053] ? mtree_range_walk+0x632/0x900 [ 39.022815] ? mas_walk+0x5c7/0x7c0 [ 39.023358] do_vmi_munmap+0x1f1/0x2b0 [ 39.023912] mmap_region+0x1f9/0x2660 [ 39.024465] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.025043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.025856] ? __pfx_lock_acquire+0x10/0x10 [ 39.026457] ? __pfx_mmap_region+0x10/0x10 [ 39.027045] ? security_mmap_addr+0x7d/0xa0 [ 39.027637] ? get_unmapped_area+0x1f5/0x3f0 [ 39.028259] do_mmap+0x854/0xf00 [ 39.028772] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.029338] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.029970] ksys_mmap_pgoff+0x3af/0x500 [ 39.030549] do_syscall_64+0x3f/0x90 [ 39.031089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.031819] RIP: 0033:0x7fed8ac3ed82 [ 39.032316] 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 [ 39.034797] RSP: 002b:00007ffeb6988c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.035793] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed8ac3ed82 [ 39.036731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed8a078000 [ 39.037664] RBP: 00007fed8a078000 R08: 0000000000000009 R09: 0000000000001000 [ 39.038594] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f17850980 [ 39.039512] R13: 00007ffeb6988c70 R14: 00007ffeb6988ca0 R15: 00007ffeb6989000 [ 39.040485] </TASK> [ 39.040824] [ 39.041065] Allocated by task 212: [ 39.041548] kasan_save_stack+0x22/0x50 [ 39.042115] kasan_set_track+0x25/0x30 [ 39.042672] __kasan_slab_alloc+0x59/0x70 [ 39.043266] kmem_cache_alloc+0x16b/0x370 [ 39.043848] vm_area_dup+0x20/0x160 [ 39.044356] __split_vma+0x170/0x950 [ 39.044895] split_vma+0xc6/0x110 [ 39.045393] mprotect_fixup+0x8d2/0xb30 [ 39.045966] do_mprotect_pkey+0x87e/0xd40 [ 39.046556] __x64_sys_mprotect+0x78/0xc0 [ 39.047260] do_syscall_64+0x3f/0x90 [ 39.047820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.048571] [ 39.048806] Freed by task 212: [ 39.049251] kasan_save_stack+0x22/0x50 [ 39.049817] kasan_set_track+0x25/0x30 [ 39.050376] kasan_save_free_info+0x2b/0x50 [ 39.050981] __kasan_slab_free+0x10a/0x190 [ 39.051576] kmem_cache_free+0x10d/0x4d0 [ 39.052153] rcu_core+0x8c8/0x2860 [ 39.052662] __do_softirq+0x1b7/0x7d4 [ 39.053198] [ 39.053441] Last potentially related work creation: [ 39.054104] kasan_save_stack+0x22/0x50 [ 39.054670] __kasan_record_aux_stack+0x8e/0xa0 [ 39.055311] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.056026] remove_vma+0x139/0x170 [ 39.056533] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.057155] do_vmi_munmap+0x1f1/0x2b0 [ 39.057695] __vm_munmap+0x138/0x3a0 [ 39.058217] __x64_sys_munmap+0x59/0x80 [ 39.058806] do_syscall_64+0x3f/0x90 [ 39.059338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.060049] [ 39.060289] The buggy address belongs to the object at ffff88800d93c000 [ 39.060289] which belongs to the cache vm_area_struct of size 168 [ 39.061963] The buggy address is located 88 bytes inside of [ 39.061963] freed 168-byte region [ffff88800d93c000, ffff88800d93c0a8) [ 39.063542] [ 39.063785] The buggy address belongs to the physical page: [ 39.064531] page:000000008f01e8df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd93c [ 39.065747] memcg:ffff88800c4b3801 [ 39.066223] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.066941] page_type: 0xffffffff() [ 39.067452] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7b00 dead000000000004 [ 39.068486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4b3801 [ 39.069510] page dumped because: kasan: bad access detected [ 39.070263] [ 39.070506] Memory state around the buggy address: [ 39.071158] ffff88800d93bf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 39.072113] ffff88800d93bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.073085] >ffff88800d93c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.074028] ^ [ 39.074843] ffff88800d93c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.075794] ffff88800d93c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.076756] ================================================================== [ 39.078167] Disabling lock debugging due to kernel taint [ 41.371891] BUG: Bad rss-counter state mm:000000005898e146 type:MM_FILEPAGES val:33 [ 41.373213] BUG: Bad rss-counter state mm:000000005898e146 type:MM_ANONPAGES val:22 [ 41.934051] BUG: Bad rss-counter state mm:00000000e3ccd892 type:MM_FILEPAGES val:33 [ 41.935283] BUG: Bad rss-counter state mm:00000000e3ccd892 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42376' (ECDSA) to the list of known hosts. 2023/06/20 22:04:58 fuzzer started 2023/06/20 22:04:58 dialing manager at localhost:36067 2023/06/20 22:04:58 checking machine... 2023/06/20 22:04:58 checking revisions... [ 42.687613] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:04:58 testing simple program... [ 42.726944] cgroup: Unknown subsys name 'net' [ 42.802264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:04:57 Registers: info registers vcpu 0 RAX=00007fcb03879868 RBX=0000000069561344 RCX=00007fcb0369aa98 RDX=0000000000000000 RSI=5a7622a34edf1a00 RDI=00007fcb0369b555 RBP=00007ffed0552a00 RSP=00007ffed0552820 R8 =00007fcb032c6c48 R9 =00007fcb03e63440 R10=00007fcb0369f060 R11=00007fcb03879500 R12=00007fcb0369b555 R13=00007ffed0552988 R14=00007fcb0369aa98 R15=00007fcb03879500 RIP=00007fcb03e41c72 RFL=00000202 [-------] 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 00007fcb032c0900 00000000 00000000 GS =0000 0000000000000000 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=00007fe2e53b3450 CR3=0000000016698000 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=00000000000000ff0000000000000000 XMM01=ffffffffffffff00ffffffffffffffff XMM02=5f4c534e42494c00302e315f4c534e42 XMM03=00000000000000000000000000000000 XMM04=617272615f72647800746e695f726478 XMM05=00007fcb03879f6000007fcb03a33950 XMM06=00007fcb03a3344000007fcb03a32f20 XMM07=00007fcb0337d12000007fcb0337cb10 XMM08=00007fcb0337c5f000007fcb0337c060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880169976da RSP=ffff888016997628 R8 =ffffffff864bbb58 R9 =ffff8880169976d8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff8880169976f8 R13=ffff8880169976e0 R14=ffff888016997f58 R15=ffff888016997698 RIP=ffffffff81131928 RFL=00000297 [--S-APC] 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 00007f66d88be900 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=00007f66d889d020 CR3=000000000e7f2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000