syzkaller login: [ 31.253003] BUG: Bad rss-counter state mm:00000000170661cc type:MM_FILEPAGES val:33 [ 31.254849] BUG: Bad rss-counter state mm:00000000170661cc type:MM_ANONPAGES val:22 [ 31.428086] ================================================================== [ 31.429005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.429978] Read of size 8 at addr ffff88800d655a50 by task sshd/219 [ 31.430858] [ 31.431085] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.431966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.433019] Call Trace: [ 31.433350] <TASK> [ 31.433656] dump_stack_lvl+0x91/0xf0 [ 31.434148] print_report+0xcc/0x620 [ 31.434638] ? __virt_addr_valid+0x102/0x340 [ 31.435184] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.435799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.436412] kasan_report+0xbe/0xf0 [ 31.436894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.437524] vma_interval_tree_remove+0xc75/0xec0 [ 31.438131] vma_prepare+0xc54/0x11a0 [ 31.438613] __split_vma+0x5af/0x950 [ 31.439085] ? __pfx___split_vma+0x10/0x10 [ 31.439613] ? find_held_lock+0x2c/0x110 [ 31.440130] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.440690] ? lock_is_held_type+0x9f/0x120 [ 31.441232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.441849] ? mtree_range_walk+0x632/0x900 [ 31.442413] ? mas_walk+0x5c7/0x7c0 [ 31.442901] do_vmi_munmap+0x1f1/0x2b0 [ 31.443399] mmap_region+0x1f9/0x2660 [ 31.443883] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.444395] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.445106] ? __pfx_lock_acquire+0x10/0x10 [ 31.445660] ? __pfx_mmap_region+0x10/0x10 [ 31.446203] ? security_mmap_addr+0x7d/0xa0 [ 31.446734] ? get_unmapped_area+0x1f5/0x3f0 [ 31.447294] do_mmap+0x854/0xf00 [ 31.447738] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.448233] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.448806] ksys_mmap_pgoff+0x3af/0x500 [ 31.449320] do_syscall_64+0x3f/0x90 [ 31.449808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450460] RIP: 0033:0x7f4fc7f76d82 [ 31.450919] 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 [ 31.453041] RSP: 002b:00007ffe4aad4218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.453959] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4fc7f76d82 [ 31.454807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4fc73b0000 [ 31.455656] RBP: 00007f4fc73b0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.456498] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564c2c0d3ec0 [ 31.457344] R13: 00007ffe4aad4230 R14: 00007ffe4aad4260 R15: 00007ffe4aad45c0 [ 31.458221] </TASK> [ 31.458517] [ 31.458732] Allocated by task 212: [ 31.459163] kasan_save_stack+0x22/0x50 [ 31.459674] kasan_set_track+0x25/0x30 [ 31.460172] __kasan_slab_alloc+0x59/0x70 [ 31.460702] kmem_cache_alloc+0x16b/0x370 [ 31.461219] vm_area_dup+0x20/0x160 [ 31.461685] __split_vma+0x170/0x950 [ 31.462155] split_vma+0xc6/0x110 [ 31.462594] mprotect_fixup+0x8d2/0xb30 [ 31.463099] do_mprotect_pkey+0x87e/0xd40 [ 31.463619] __x64_sys_mprotect+0x78/0xc0 [ 31.464135] do_syscall_64+0x3f/0x90 [ 31.464616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.465261] [ 31.465482] Freed by task 202: [ 31.465902] kasan_save_stack+0x22/0x50 [ 31.466409] kasan_set_track+0x25/0x30 [ 31.466905] kasan_save_free_info+0x2b/0x50 [ 31.467443] __kasan_slab_free+0x10a/0x190 [ 31.467990] kmem_cache_free+0x10d/0x4d0 [ 31.468501] rcu_core+0x8c8/0x2860 [ 31.468948] __do_softirq+0x1b7/0x7d4 [ 31.469430] [ 31.469654] Last potentially related work creation: [ 31.470231] kasan_save_stack+0x22/0x50 [ 31.470739] __kasan_record_aux_stack+0x8e/0xa0 [ 31.471314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.471954] remove_vma+0x139/0x170 [ 31.472409] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.472971] do_vmi_munmap+0x1f1/0x2b0 [ 31.473462] __vm_munmap+0x138/0x3a0 [ 31.473937] __x64_sys_munmap+0x59/0x80 [ 31.474442] do_syscall_64+0x3f/0x90 [ 31.474920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.475570] [ 31.475788] The buggy address belongs to the object at ffff88800d6559f8 [ 31.475788] which belongs to the cache vm_area_struct of size 168 [ 31.477251] The buggy address is located 88 bytes inside of [ 31.477251] freed 168-byte region [ffff88800d6559f8, ffff88800d655aa0) [ 31.478671] [ 31.478891] The buggy address belongs to the physical page: [ 31.479544] page:0000000026832268 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd655 [ 31.480623] memcg:ffff888013ff7a01 [ 31.481055] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.481769] page_type: 0xffffffff() [ 31.482221] raw: 0100000000000200 ffff8880087a0c80 ffffea0000392680 dead000000000003 [ 31.483134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ff7a01 [ 31.484035] page dumped because: kasan: bad access detected [ 31.484700] [ 31.484917] Memory state around the buggy address: [ 31.485495] ffff88800d655900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.486374] ffff88800d655980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.487237] >ffff88800d655a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.488090] ^ [ 31.488790] ffff88800d655a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.489650] ffff88800d655b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.490502] ================================================================== [ 31.491471] Disabling lock debugging due to kernel taint [ 33.494916] BUG: Bad rss-counter state mm:00000000ce5cc1fc type:MM_FILEPAGES val:33 [ 33.495959] BUG: Bad rss-counter state mm:00000000ce5cc1fc type:MM_ANONPAGES val:22 [ 34.062951] BUG: Bad rss-counter state mm:0000000078676210 type:MM_FILEPAGES val:33 [ 34.064141] BUG: Bad rss-counter state mm:0000000078676210 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22573' (ECDSA) to the list of known hosts. 2023/06/21 00:59:23 fuzzer started 2023/06/21 00:59:23 dialing manager at localhost:36067 2023/06/21 00:59:23 checking machine... 2023/06/21 00:59:23 checking revisions... [ 34.647412] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:59:23 testing simple program... [ 34.704973] cgroup: Unknown subsys name 'net' [ 34.759198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:59:22 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff8880167a3680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff8880167a3a74 RBP=ffff8880167a3680 RSP=ffff88800f77f828 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880167a3680 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff888016159e58 RIP=ffffffff813745aa RFL=00000202 [-------] 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 00007fb6b64e2900 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=00007fb6b6a99618 CR3=000000000c832000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f27b4fc4720 CR3=000000000970c000 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=8395384d0384d995ba40d7d0d34f1a93 XMM02=ec2efd57dc4c00df000000000011cad0 XMM03=95c972889db43e93000000000011cba0 XMM04=3c4671e3477690bb00000000000ae988 XMM05=dfcdbad4f1609c370000000000133318 XMM06=0bc8913001c63b9e0000000000132180 XMM07=e042d86d42eb936e0000000000123718 XMM08=95c972889db43e93000000000011cba0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000