syzkaller login: [ 33.261202] BUG: Bad rss-counter state mm:00000000784e58bd type:MM_FILEPAGES val:33 [ 33.262351] BUG: Bad rss-counter state mm:00000000784e58bd type:MM_ANONPAGES val:22 [ 33.441665] ================================================================== [ 33.442683] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.443716] Read of size 8 at addr ffff888019d166b0 by task sshd/219 [ 33.444687] [ 33.444927] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.445888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.446964] Call Trace: [ 33.447318] [ 33.447633] dump_stack_lvl+0x91/0xf0 [ 33.448173] print_report+0xcc/0x620 [ 33.448706] ? __virt_addr_valid+0x102/0x340 [ 33.449316] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.450028] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.450710] kasan_report+0xbe/0xf0 [ 33.451238] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.451929] vma_interval_tree_remove+0xc75/0xec0 [ 33.452597] vma_prepare+0xc54/0x11a0 [ 33.453128] __split_vma+0x5af/0x950 [ 33.453653] ? __pfx___split_vma+0x10/0x10 [ 33.454252] ? find_held_lock+0x2c/0x110 [ 33.454833] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.455461] ? lock_is_held_type+0x9f/0x120 [ 33.456059] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.456731] ? mtree_range_walk+0x632/0x900 [ 33.457343] ? mas_walk+0x5c7/0x7c0 [ 33.457874] do_vmi_munmap+0x1f1/0x2b0 [ 33.458422] mmap_region+0x1f9/0x2660 [ 33.458956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.459526] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.460317] ? __pfx_lock_acquire+0x10/0x10 [ 33.460920] ? __pfx_mmap_region+0x10/0x10 [ 33.461517] ? security_mmap_addr+0x7d/0xa0 [ 33.462130] ? get_unmapped_area+0x1f5/0x3f0 [ 33.462747] do_mmap+0x854/0xf00 [ 33.463236] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.463790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.464417] ksys_mmap_pgoff+0x3af/0x500 [ 33.464985] do_syscall_64+0x3f/0x90 [ 33.465519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.466251] RIP: 0033:0x7f195e069d82 [ 33.466763] 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 [ 33.469171] RSP: 002b:00007ffc74cbe7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.470207] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f195e069d82 [ 33.471162] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f195d4a3000 [ 33.472114] RBP: 00007f195d4a3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.473066] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c02e607f70 [ 33.474030] R13: 00007ffc74cbe7f0 R14: 00007ffc74cbe820 R15: 00007ffc74cbeb80 [ 33.474995] [ 33.475322] [ 33.475564] Allocated by task 212: [ 33.476044] kasan_save_stack+0x22/0x50 [ 33.476612] kasan_set_track+0x25/0x30 [ 33.477166] __kasan_slab_alloc+0x59/0x70 [ 33.477756] kmem_cache_alloc+0x16b/0x370 [ 33.478344] vm_area_dup+0x20/0x160 [ 33.478856] __split_vma+0x170/0x950 [ 33.479380] split_vma+0xc6/0x110 [ 33.479872] mprotect_fixup+0x8d2/0xb30 [ 33.480432] do_mprotect_pkey+0x87e/0xd40 [ 33.481017] __x64_sys_mprotect+0x78/0xc0 [ 33.481602] do_syscall_64+0x3f/0x90 [ 33.482151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.482871] [ 33.483111] Freed by task 212: [ 33.483550] kasan_save_stack+0x22/0x50 [ 33.484112] kasan_set_track+0x25/0x30 [ 33.484666] kasan_save_free_info+0x2b/0x50 [ 33.485261] __kasan_slab_free+0x10a/0x190 [ 33.485864] kmem_cache_free+0x10d/0x4d0 [ 33.486434] rcu_core+0x8c8/0x2860 [ 33.486929] __do_softirq+0x1b7/0x7d4 [ 33.487464] [ 33.487703] Last potentially related work creation: [ 33.488357] kasan_save_stack+0x22/0x50 [ 33.488921] __kasan_record_aux_stack+0x8e/0xa0 [ 33.489570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.490219] remove_vma+0x139/0x170 [ 33.490672] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.491235] do_vmi_munmap+0x1f1/0x2b0 [ 33.491725] __vm_munmap+0x138/0x3a0 [ 33.492194] __x64_sys_munmap+0x59/0x80 [ 33.492695] do_syscall_64+0x3f/0x90 [ 33.493171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.493811] [ 33.494052] The buggy address belongs to the object at ffff888019d16658 [ 33.494052] which belongs to the cache vm_area_struct of size 168 [ 33.495506] The buggy address is located 88 bytes inside of [ 33.495506] freed 168-byte region [ffff888019d16658, ffff888019d16700) [ 33.496912] [ 33.497135] The buggy address belongs to the physical page: [ 33.497831] page:000000004cff8256 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d16 [ 33.499040] memcg:ffff88800d8a2601 [ 33.499490] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.500168] page_type: 0xffffffff() [ 33.500646] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.501691] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8a2601 [ 33.502707] page dumped because: kasan: bad access detected [ 33.503434] [ 33.503670] Memory state around the buggy address: [ 33.504318] ffff888019d16580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.505269] ffff888019d16600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.506242] >ffff888019d16680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.507180] ^ [ 33.507826] ffff888019d16700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.508780] ffff888019d16780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.509720] ================================================================== [ 33.510833] Disabling lock debugging due to kernel taint [ 35.432790] BUG: Bad rss-counter state mm:0000000030c94ba1 type:MM_FILEPAGES val:33 [ 35.433563] BUG: Bad rss-counter state mm:0000000030c94ba1 type:MM_ANONPAGES val:22 [ 35.835781] BUG: Bad rss-counter state mm:00000000f8d57916 type:MM_FILEPAGES val:33 [ 35.836566] BUG: Bad rss-counter state mm:00000000f8d57916 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26011' (ECDSA) to the list of known hosts. 2023/06/19 17:46:41 fuzzer started 2023/06/19 17:46:41 dialing manager at localhost:44161 2023/06/19 17:46:41 checking machine... 2023/06/19 17:46:41 checking revisions... [ 36.520808] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:46:41 testing simple program... [ 36.567296] cgroup: Unknown subsys name 'net' [ 36.615351] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:38 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000890e646f RCX=ffff88806cb32378 RDX=000000000000000a RSI=0000000000000002 RDI=000000004acde210 RBP=ffff8880101e8700 RSP=ffff8880142c7a58 R8 =000000006d016e5d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000cc0 R14=ffff8880142c7ac0 R15=000000000000000a RIP=ffffffff82270f2d 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 00007f18eac42900 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=00007f18eb1fa0b0 CR3=000000000ebfe000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007fb471ede000 CR3=0000000009704000 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=2ca95930c7227eb7734cf822935edb59 XMM02=000000000011f680ec2efd57dc4c00df XMM03=0000000000123e2093a8d27d0bcc8a55 XMM04=38ad642384740b5300000000000ae988 XMM05=f651bc26d56e59700000000000134760 XMM06=806171799158d9670000000000133800 XMM07=e042d86d42eb936e00000000001240a0 XMM08=93a8d27d0bcc8a55000000000011f6e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000