syzkaller login: [ 35.288178] BUG: Bad rss-counter state mm:000000006941d8b6 type:MM_FILEPAGES val:33 [ 35.289394] BUG: Bad rss-counter state mm:000000006941d8b6 type:MM_ANONPAGES val:22 [ 35.403560] ================================================================== [ 35.404552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.405540] Read of size 8 at addr ffff88800db6c4e0 by task sshd/220 [ 35.406353] [ 35.406583] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.407625] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.408663] Call Trace: [ 35.408989] [ 35.409308] dump_stack_lvl+0x91/0xf0 [ 35.409798] print_report+0xcc/0x620 [ 35.410339] ? __virt_addr_valid+0x102/0x340 [ 35.410898] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.411552] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.412213] kasan_report+0xbe/0xf0 [ 35.412707] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.413360] vma_interval_tree_remove+0xc75/0xec0 [ 35.413975] vma_prepare+0xc54/0x11a0 [ 35.414502] __split_vma+0x5af/0x950 [ 35.414987] ? __pfx___split_vma+0x10/0x10 [ 35.415546] ? find_held_lock+0x2c/0x110 [ 35.416100] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.416682] ? lock_is_held_type+0x9f/0x120 [ 35.417268] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.417885] ? mtree_range_walk+0x632/0x900 [ 35.418469] ? mas_walk+0x5c7/0x7c0 [ 35.418955] do_vmi_munmap+0x1f1/0x2b0 [ 35.419467] mmap_region+0x1f9/0x2660 [ 35.419964] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.420503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.421251] ? __pfx_lock_acquire+0x10/0x10 [ 35.421790] ? __pfx_mmap_region+0x10/0x10 [ 35.422369] ? security_mmap_addr+0x7d/0xa0 [ 35.422911] ? get_unmapped_area+0x1f5/0x3f0 [ 35.423495] do_mmap+0x854/0xf00 [ 35.423950] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.424492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.425090] ksys_mmap_pgoff+0x3af/0x500 [ 35.425634] do_syscall_64+0x3f/0x90 [ 35.426149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.426810] RIP: 0033:0x7f3433a2ad82 [ 35.427293] 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 [ 35.429469] RSP: 002b:00007ffe9c0a1328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.430427] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3433a2ad82 [ 35.431301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3432e64000 [ 35.432182] RBP: 00007f3432e64000 R08: 0000000000000009 R09: 0000000000001000 [ 35.433046] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fbc4d2ec0 [ 35.433936] R13: 00007ffe9c0a1340 R14: 00007ffe9c0a1370 R15: 00007ffe9c0a16d0 [ 35.434815] [ 35.435113] [ 35.435330] Allocated by task 213: [ 35.435766] kasan_save_stack+0x22/0x50 [ 35.436284] kasan_set_track+0x25/0x30 [ 35.436791] __kasan_slab_alloc+0x59/0x70 [ 35.437328] kmem_cache_alloc+0x16b/0x370 [ 35.437843] vm_area_dup+0x20/0x160 [ 35.438319] __split_vma+0x170/0x950 [ 35.438798] split_vma+0xc6/0x110 [ 35.439252] mprotect_fixup+0x8d2/0xb30 [ 35.439769] do_mprotect_pkey+0x87e/0xd40 [ 35.440298] __x64_sys_mprotect+0x78/0xc0 [ 35.440835] do_syscall_64+0x3f/0x90 [ 35.441318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.441993] [ 35.442226] Freed by task 203: [ 35.442631] kasan_save_stack+0x22/0x50 [ 35.443142] kasan_set_track+0x25/0x30 [ 35.443644] kasan_save_free_info+0x2b/0x50 [ 35.444186] __kasan_slab_free+0x10a/0x190 [ 35.444742] kmem_cache_free+0x10d/0x4d0 [ 35.445263] rcu_core+0x8c8/0x2860 [ 35.445726] __do_softirq+0x1b7/0x7d4 [ 35.446223] [ 35.446447] Last potentially related work creation: [ 35.447040] kasan_save_stack+0x22/0x50 [ 35.447548] __kasan_record_aux_stack+0x8e/0xa0 [ 35.448130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.448790] remove_vma+0x139/0x170 [ 35.449250] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.449813] do_vmi_munmap+0x1f1/0x2b0 [ 35.450334] __vm_munmap+0x138/0x3a0 [ 35.450808] __x64_sys_munmap+0x59/0x80 [ 35.451313] do_syscall_64+0x3f/0x90 [ 35.451796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.452446] [ 35.452664] The buggy address belongs to the object at ffff88800db6c488 [ 35.452664] which belongs to the cache vm_area_struct of size 168 [ 35.454175] The buggy address is located 88 bytes inside of [ 35.454175] freed 168-byte region [ffff88800db6c488, ffff88800db6c530) [ 35.455613] [ 35.455831] The buggy address belongs to the physical page: [ 35.456494] page:000000006f4b4029 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb6c [ 35.457617] memcg:ffff88800e23f701 [ 35.458091] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.458758] page_type: 0xffffffff() [ 35.459215] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.460150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e23f701 [ 35.461070] page dumped because: kasan: bad access detected [ 35.461752] [ 35.461971] Memory state around the buggy address: [ 35.462577] ffff88800db6c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.463442] ffff88800db6c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.464305] >ffff88800db6c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.465170] ^ [ 35.465942] ffff88800db6c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.466820] ffff88800db6c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.467695] ================================================================== [ 35.468915] Disabling lock debugging due to kernel taint [ 37.830082] BUG: Bad rss-counter state mm:0000000045dd13e5 type:MM_FILEPAGES val:33 [ 37.831357] BUG: Bad rss-counter state mm:0000000045dd13e5 type:MM_ANONPAGES val:22 [ 38.232138] BUG: Bad rss-counter state mm:000000000b4454d3 type:MM_FILEPAGES val:33 [ 38.233352] BUG: Bad rss-counter state mm:000000000b4454d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63816' (ECDSA) to the list of known hosts. 2023/06/19 19:57:40 fuzzer started 2023/06/19 19:57:40 dialing manager at localhost:44161 2023/06/19 19:57:40 checking machine... 2023/06/19 19:57:40 checking revisions... [ 38.954947] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:57:41 testing simple program... [ 39.005854] cgroup: Unknown subsys name 'net' [ 39.045848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:57:35 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880180dc000 RCX=0000000000000000 RDX=ffff888015c2b680 RSI=ffffffff8386d447 RDI=ffffffff87f94640 RBP=1ffff11002b7ff50 RSP=ffff888015bffa78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff87f94640 R15=ffff88800ee013c0 RIP=ffffffff814c0800 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 00007f59f0e48900 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=00007f59f13ff618 CR3=000000000fb38000 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=0000000000000001 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=00007febc4dd8600 CR3=000000000d9a6000 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=af55e9105ea99bb5d74863125a324f50 XMM02=2c67c8bc2e329bc3000000000011c8e0 XMM03=fb795ef6d65770560000000000123d48 XMM04=8742537f4ed3302600000000000ae988 XMM05=19e9129bd510f23500000000001338b0 XMM06=4fda316b135da52b0000000000133738 XMM07=e042d86d42eb936e0000000000123fc8 XMM08=ddef586ccf25aba1000000000011c940 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000